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Charcoal, especially in its medicinal form, goes back centuries. Ancient Egyptians swore by it for treating stomach problems. Greeks and Romans turned to charcoal to downplay food poisoning and filter water. Not until the 19th century did the modern drug industry take the primitive wisdom and turn it into the fine-grade powders we see today. Regulatory bodies in Europe (EP), Britain (BP), and the United States (USP) built standards to make sure charcoal used for medicine is safe. They pushed for elimination of impurities, tighter grade control, and traceable origins. In hospitals around the world, medical professionals reached for pharmaceutical charcoal to help treat overdoses and poisonings long before anyone published clinical trials. The battle between practical experience and strict documentation shaped the medicine cabinet staple. Going back, early apothecaries prepared their own versions from wood carefully burnt without oxygen. Now, pharmaceutical companies churn out precisely-calibrated powders in sterile plants, far from the smoky hearths of old.
Medicinal Charcoal BP EP USP Pharma Grade means more than just a black powder. These grades spell out the difference between coal ground by amateurs and a controlled, tested product suitable for swallowing or even for intricate medical devices. Companies select specific woods (often birch, coconut shell, or willow) since different sources change the resulting carbon structure. Activation gives the product its signature porousness—one teaspoon holds the surface area of a tennis court. Meeting the badge of BP, EP, or USP means passing a battery of tests for purity, absorption ability, absence of toxic residues, and bacterial safety. You won’t find sand, dirt, or splinters. Only the clean, superfine, highly absorbent carbon powder leaves the factory, and it carries a certificate tracing its origins and properties.
Charcoal’s magic lies in its structure. It's almost pure carbon, riddled with minuscule holes that trap molecules through a process called adsorption (not absorption—this is surface-based chemical binding). The particles look like jet-black dust or granules with a peculiar silken feel. High-grade pharma carbon runs to about 95-99% elemental carbon. The powder floats lightly on the breeze, mixes well in water, and never quite dissolves. Instead, it creates a dense suspension—perfect for gastrointestinal use. The material shows thermal resistance and stays inert with most substances, except strong oxidizers. Moisture content hovers around 12%, and pH checks land between 4.5 and 7.5. Pharmaceutical-grade powder must screen out heavy metals, tar, and residual hydrocarbons, ensuring no chance of unwanted reactions upon ingestion or contact.
Regulatory standards lay out clear technical specs. Each batch must show the right mesh size—usually below 100 microns for powder. Surface area needs to reach at least 1000 square meters per gram, verified using nitrogen BET testing. Heavy metal content cannot cross the minuscule amounts demanded by official pharmacopeia. The label must name the source wood or raw material, production method (such as “steam-activated” or “phosphoric acid-activated”), and rigorous lot numbers for traceability. Water solubles and acid solubles stay under prescribed limits. These details matter because inconsistency can compromise patient care. For toxic ingestions, dose accuracy and quick action mean the difference between full recovery and lingering harm. Medical staff can only trust a product marked by that BP, EP, or USP stamp of quality.
Producers source hardwood, bamboo, or coconut shells, then dry and carbonize them under low-oxygen conditions so they don’t catch fire. This turns the material into char. Next, comes activation—superheating the char in steam, carbon dioxide, or activating chemicals. This process cracks open micro-pores, multiplying the surface area a thousand-fold. Afterwards, manufacturers grind the activated carbon, sieve out unwanted particle sizes, then sterilize the powder. Some forms even get additional acid or base washing to clean off any lingering impurities. Samples from every batch hit the testing lab before shipping. Over the years, insulin-tight manufacturing processes have replaced fireplaces and guesswork, yielding powders that behave predictably for life-saving situations.
Medicinal charcoal avoids most reactions because of its stability. Still, chemical tweaks exist to boost performance. Oxygen treatments add polar groups like carboxyl or hydroxyl to increase binding of certain toxins. Acid-washed forms strip away metallic or mineral contaminants. Pharmaceutical chemists also explore blending charcoal with enzymes or resins to home in on targets like urea, pesticides, or even viral byproducts. These modifications push beyond the entry-level uses and open possibilities for precise, personalized treatments. The industry chases after new coating technologies so charcoal can better survive passage through the harsh gastric environment.
This substance wears many names in different settings. Pharmacists write “Activated Carbon” or “Carbo Activatus”. Older pharmacopoeias distinguished “Carbo Ligni” (from wood) versus “Carbo Animalis” (from bones). Some medical depots simply list “Medicinal Charcoal” because it’s so established. Brand names, which hop from language to language, include Carbo medicinalis, Norit, Charcodote, or even more regionally-flavored titles. Despite the alphabet soup, all refer to the same stuff—highly-proven, purified, activated carbon powder built for life-and-death applications.
Charcoal seems humble, but misuse or low-quality material brings real risks. Strict tests weed out coliforms, salmonella, or spores. Drug standards also cut the risk of silica, glass, or heavy metals, even at microgram levels. Any facility packaging or blending pharma carbon must operate under GMP (Good Manufacturing Practices) rules and possess regular audit certificates. Medical grade carbon powders can’t mingle with industrial batches since contamination from solvents or oils would destroy clinical trust. Pharma supply chains map out every step from farm to bottle, reducing the risk of counterfeit materials. In field hospitals—or on pharmacy shelves—this lets doctors and patients relax about what goes into the body at crucial moments.
Activated medicinal charcoal entered mainstream hospitals as a detox agent for overdoses or poisonings. Emergency room teams give a syrupy suspension down an NG tube or by mouth to mop up toxins—think acetaminophen, many over-the-counter pills, and even some pesticides. Its role stretches into water purification for kidney dialysis. In some GI procedures, clinicians use it to filter gases and reduce bloating. Outside the ER, research investigates links between charcoal and cholesterol-lowering, improved gut health, and even treatment for chronic kidney failure. Some air filter mask designs line the inside with medical-grade carbon, intercepting allergens or industrial fumes before they get a chance.
The world’s research labs dig into ways to make pharmaceutical charcoal smarter and more specialized. Ongoing studies target selectivity—hoping to bind drugs but spare vitamins or electrolytes. Teams investigate embedding carbon into polymers, creating slow-release carriers or wound dressings. Researchers adapt the pore structure for better performance against bacterial toxins like Clostridium difficile. New advances bring biotechnological twists: microbiome-friendly charcoal, plant-based formulations, and nano-activated carbons. Data continues to pour in comparing grades, shelf life, and the best ways to install charcoal into smart medical devices. Clinical trials aim to build the data backbone missing in the 20th century, giving modern medicine the solid numbers regulators now demand.
Despite its reputation for binding up toxins, charcoal cannot claim total innocuousness. Standard toxicology studies weigh in on rare side effects like constipation, aspiration pneumonia, or blockage of medical feeding tubes. Swallowing sharp-edged, raw carbon brings GI injury, so pharmaceutical powder tries for smooth micro-spheres. Recent animal work has sought to define whether binding up nutrients could starve gut bacteria or inadvertently lower absorption of essential medications. The consensus so far supports its safety, but new use cases mean the toxicology file grows thicker, not thinner. Safety monitoring and detailed post-market surveillance remain standard.
Medicinal charcoal faces a bright but challenging future. Innovation won’t come from just making it blacker or finer. The drive now focuses on disease-specific formulations, such as beads for gut-targeted detox or smart carbons that change shape in response to pH. Regulatory expectations will only toughen as personalized medicine pushes for targeted interventions. Charcoal’s broad safety profile gives it a foundation, yet new delivery methods and combination products will need careful study. The push for greener, renewable sources—bamboo, coconut, even algae—ties carbon medicine into the larger environmental responsibility conversation. Research grows on linking this ancient remedy to 21st-century treatments for metabolic disease, cancer, and even post-viral syndromes. Whether as a frontline ER antidote or a component of next-generation medtech, pharmaceutical charcoal’s evolution continues under the eyes of regulators, clinicians, and researchers chasing more precise, reliable patient care.
Pharma grade medicinal charcoal, especially the 767 variety that matches the British, European, and US Pharmacopeia standards, stands out for its high purity and controlled production. Unlike regular activated charcoal you find in air filters or water purification products, 767 grade aims squarely at medical safety. The particles reach a fine, almost powdery texture, making it much more suited for ingestion or topical applications.
One of the reasons pharmacists and hospitals insist on this grade comes down to strict quality control. Contaminants can cause harm, so manufacturers go to great lengths to keep this material free of heavy metals, microbes, and unreacted chemicals. This attention to purity also speaks to people’s rising concerns about adulteration in health supplements and medicines.
For doctors in emergency rooms, medicinal charcoal isn’t some exotic remedy. It sits on the shelf as a frontline tool, often used in cases where someone swallows a toxic substance or drug overdose occurs. Thanks to its porous surface, this charcoal locks harmful chemicals inside its structure, stopping the poisons from sneaking into the bloodstream through the gut.
Drugs like acetaminophen, aspirin, and even certain pesticides often respond well to this method if caught quickly. Every year, Poison Control Centers across the globe recommend it in thousands of acute poisonings. The World Health Organization includes it on important lists for essential emergency medicines. That trust comes from decades of clinical evidence showing how quickly it reduces absorption of toxins in a crisis.
Beyond emergencies, pharmacists sometimes suggest medicinal charcoal for bloating, flatulence, or diarrhea. Again, the same porous texture is key—gas molecules and some irritants stick to the surface, which brings relief as the body passes them out. This isn’t a universal cure, but for people struggling with occasional digestive flare-ups, some doctors see it as a gentle solution with a long track record.
A word of warning comes naturally here: Not every stomach ache needs charcoal, and it can interfere with medicines like antibiotics or birth control pills by absorbing them as well. Patients need to check with their healthcare provider so they won’t blunt the effect of their routine medication.
The Pharma Grade label means something real for anyone who works with this material. Reputable manufacturers stick with BP, EP, and USP rules as a baseline—these cover everything from ash content and moisture down to how finely ground the powder is. Each batch goes through testing because a batch that falls out of bounds carries serious risks if swallowed or applied to wounds.
A few years ago, a local clinic shared a story about receiving a shipment with particles much larger than advertised, leading to blocked feeding tubes in several cases. That shipment got pulled instantly. Scenarios like this underline why tight standards and regular audits can’t be skipped.
Today, most hospitals and clinics source their charcoal from certified suppliers and demand a full chain of documentation. Clinics focus on training staff and providing clear information to patients, so errors around dosage or timing are less likely. Inspection agencies and healthcare providers have tightened oversight. These steps increase safety and support the push for better patient outcomes.
Medicinal charcoal has held its place for generations because it brings real, evidence-based value to emergency care. Strong, transparent supply chains and committed quality testing protect people in vulnerable moments, turning a black powder into a safeguard trusted across continents.
It’s easy to walk through a pharmacy aisle, see bottles labeled “medicinal charcoal,” and never give a second thought to the complex process of making something safe enough to swallow. People use it for a range of reasons: to treat poisoning, for upset stomach, or as part of a detox routine. For products like 767 Medicinal Charcoal to be trusted, they have to meet certain standards—no shortcuts, no cutting corners. In my experience working alongside pharmacists and lab techs, I’ve learned it takes layers of diligence to keep people safe. Every bottle on the shelf stands on the back of careful measurement and honest science.
Let’s break it down. This charcoal isn’t the powder you scrape out of a barbecue grill. The starting material usually comes from plant sources—often coconut shells or hardwood. These get superheated in an environment with very little oxygen, a process known as “activation.” At the end, the powder has countless microscopic pores that can trap toxins and gases.
Pharmacopoeias set the benchmarks. For instance, the United States Pharmacopeia (USP) and European Pharmacopeia (Ph. Eur.) define what “medicinal grade” means—so we’re not left guessing. For 767 Medicinal Charcoal, the focus stays sharp on purity, particle size, and safety.
If you were to peek into the purity requirements, you’d see heavy metals must fit inside tight limits. Lead, arsenic, and mercury—these have to be practically undetectable. Moisture content also gets watched. Too much water in the powder means the risk of spoilage and loss of effectiveness. That’s tested by loss on drying, and the number should typically stay below 15%.
Acid-insoluble ash gives another layer of assurance. That’s a check for leftover mineral grit or sand that wouldn’t do much good in your digestive tract. For 767 Medicinal Charcoal, this measure keeps the “junk” content low. A solid product would show less than 4% acid-insoluble ash—anything more raises concern.
Some people think all black powders are the same. That’s just not true. Microbiological purity matters, especially in products you take internally. Manufacturers keep bacteria, yeast, and mold counts as close to zero as possible. The process often uses steam or high heat to keep things clean without adding unwanted chemicals. In the labs I’ve visited, the teams run repeated microbial tests, not just on the finished product, but along each step.
Imagine having to swallow gravel. Particle size affects how the charcoal mixes, dissolves, or suspends in water, which in turn shapes how folks can take it—especially children or anyone who struggles with pills. For 767 grade, most of the powder should pass through a sieve of 75 microns, with only a small fraction left behind. That keeps the texture smooth and reduces the risk of an unpleasant sensation or poor effectiveness.
Every lot of medicinal charcoal goes through a batch-specific certificate of analysis—real paperwork produced and made available to anyone who inquires. The dose that’s safe for one product can be risky for another if the charcoal hides contaminants or inconsistencies. That’s why reputable makers stick to stringent standards and let doctors and pharmacists see exactly what’s inside each batch.
If I could change one thing, it would be stronger oversight and more frequent checks—especially for brands sold online. Counterfeit or subpar batches aren’t just a headache; they risk patient safety. Better public education helps, too. Few people outside of pharmacy or toxicology know what defines “pharmaceutical grade.” Campaigns aimed at both consumers and health professionals can keep everyone on the same page. Accessible, verified lab results online would make it easier for buyers to trust what they’re taking home.
The detail behind 767 Medicinal Charcoal highlights an important truth: safety comes from transparency and hard science in every dose. The tough standards exist for a reason, and cutting corners here just isn’t worth the gamble.
There’s plenty to unpack in a seemingly simple bag of medicinal charcoal. Sometimes people think, “Charcoal is charcoal.” Anyone standing in front of the pharmacy shelf might blend the black powders in their mind. Yet, labels matter a lot. Products like 767 Medicinal Charcoal often list themselves as “industrial” or “technical” grade. That should set off an alarm bell or two. What works to trap toxins in water filters or in air masks might not belong in the body.
Human consumption calls for more than just grinding down charcoal. Pharmaceutical and food codes set benchmarks for purity and contaminants. I once asked a pharmacist about picking charcoal for mild poisoning or digestive issues at home. Her answer cut right through: “Look for USP or BP pharmacopeia grades. Everything else might carry risks.” Industrial batches like 767 typically skip many checks for bacteria, heavy metals, or leftover solvents.
The food and drug regulators keep a watchful eye. Each charcoal batch for medicine goes through multiple rounds of tests. These tests weed out stuff like arsenic, lead, or mercury—a big deal for anyone actually swallowing a product. Compare that to some industrial charcoals made for things like gas masks or water filters. Those manufacturers dial up absorption power, but no one swears by its safety if you sip it. Several cases have popped up worldwide where people consumed non-pharma charcoal and reported nausea, abdominal pain, or worse, metal poisoning.
The World Health Organization points out, pharmaceutical charcoal only qualifies after purity tests and microbe screening. A 2020 review by the European Medicines Agency highlighted that side products during charcoal activation can slip through without strict oversight. Such risks grow sharper because charcoal pulls in particles, including nasty ones, into its many pores. If it’s not cleaned for humans, contaminants get invited along for the ride.
I’ve met a few herbalists who swear by charcoal’s value for stomach troubles or accidental overdoses. One said, “People have used charcoal for centuries—but getting it pure meant burning clean wood and never mixing ashes.” Today, picking non-pharma grades throws out those hard-learned lessons. A factory claim that reads “medicinal” doesn’t guarantee it passes the bar for pills or food supplements.
People trust natural solutions more lately, and activated charcoal feels “old-school safe.” It makes sense to want a simple answer to bloating or mild poisoning. Still, buying anything vaguely labeled “medicinal” or “activated” from industrial suppliers isn’t worth the risk. Pharmacies and trustworthy herbal shops will have products with USP, BP, or EP stamps—those letters mean specific, rigorous checks.
It pays to ask questions at the counter. If in doubt, ask where it meets pharmaceutical standards or request the analysis certificate. Even online, reputable sellers will show paperwork for purity and safety. Regulators and manufacturers ought to push for clearer labeling across the board, so nobody ends up swallowing something meant for smoke filters or factory use. When health’s on the line, it never hurts to play it safe.
Charcoal sounds simple. Most people picture some black powder, maybe remember that it gets tossed on to counteract certain kinds of poisoning. Yet, after seeing how lax storage can mess up medications—from moisture loss to cross-contamination—the risks become pretty clear. Medicinal charcoal, especially the kind labeled 767, absorbs more than just stomach toxins. Humidity from leaky cabinets, chemical residues from poorly chosen containers, and curious hands all cause the charcoal to lose its punch.
Medical-grade charcoal, like 767, gets used in emergencies for a reason—it’s all about absorption. In hospitals, professionals depend on this simple powder to snatch up toxins fast, before the body does. If the charcoal absorbs water or household odors because someone left the tin open in a humid bathroom, its power gets wasted long before a patient ever gets a chance to use it.
One mistake I saw in a clinic involved storing several canisters with the lids cracked open, right next to bottles of solvents and cleaning sprays. Staff believed the charcoal worked just the same, but that batch ended up full of odd smells and clumps, no longer trustworthy for dosing.
A dry, cool environment comes before anything else. Do not stash medicinal charcoal next to a sink or anywhere with heavy condensation—the charcoal will grab moisture out of the air and turn lumpy before you notice. Choose a tight container with a solid seal—glass or hard plastic does the job, as long as the lid sits on tight after each use. Metal works too, but avoid rust-prone or dented tins that can shed particles.
Charcoal must stay away from chemicals. Scented cleaning supplies, perfumes, and even strong spices in a kitchen storage area leave behind residues or smells. Charcoal works almost like a sponge, sucking these up from the air if exposed.
Label every container, even if you buy pre-packed jars. Include the lot number, expiration date, and instructions for use. Storing a scoop with the powder helps, but only if you clean and dry it after each use. In homes with kids, treat medicinal charcoal like other medical supplies—keep it out of reach, secured on a high shelf or in a locked cabinet.
One overlooked habit in clinics involves caregivers pouring from original canisters into smaller unlabeled jars for "convenience." Out of sight often means out of mind, and that’s how expired or contaminated batches end up accidentally used. Consistency with labeling and discipline around tracking batches protects everyone.
Clean, dry hands or gloves before handling. Use a dedicated scoop; never scoop from the jar with a spoon freshly used for food or water. Any spill should be cleaned right away—charcoal stains clothing and makes floors slick. I’ve slipped on a patch of spilt powder before, so now I always brush it up right away.
If you work with medicinal charcoal regularly, educate everyone in the home or workplace about its proper handling. Print instructions and tape them inside the storage cupboard. If exposure to humidity occurs—say from a flood or major leak—throw out that batch and start fresh. The stakes run too high to gamble with contaminated supplies.
Treating medicinal charcoal with respect takes little effort. Stick to strong, sealed containers, keep the powder dry, and keep it far from chemicals and careless hands.
Safe storage seems like a small step, but it’s a simple act that protects the value of every batch—something I’ve seen reinforced every time poorly stored charcoal fails at the moment patients need it most.
People know medicinal charcoal as a natural remedy for digestive issues like gas, upset stomach, or food poisoning. Doctors and pharmacists trust it because activated charcoal binds toxins and chemicals in the gut, stopping them from getting absorbed. Though it sounds simple, figuring out the right dosage isn’t always straightforward. Taking too little might not do anything, while too much can lead to constipation or interfere with your body’s ability to absorb nutrients and medications.
Most adults who use medicinal charcoal for upset stomach or accidental ingestion of certain toxins take between 500 mg and 1,000 mg per dose. For minor digestive problems, a typical approach is to take one or two capsules or tablets (250 mg each) after meals or at the onset of symptoms. Some sources, including the U.S. National Poison Control Center, recommend doses up to 50 grams for poisonings, but that’s under medical supervision only. The everyday user should never self-administer high doses without medical advice. Splitting into two smaller doses over a few hours may help limit digestive side effects.
Charcoal comes in capsules, tablets, and as a fine powder. People who take it as a capsule just swallow with water. For powder, mix the recommended amount into a full glass of water and drink quickly—charcoal doesn’t dissolve, so you’ll notice some gritty texture. Swallowing charcoal on an empty stomach helps it trap more unwanted material before food slows absorption. Avoid combining with dairy or fatty foods, since they can coat the charcoal and keep it from working properly. Some experts recommend taking charcoal tablets at least two hours apart from other medications or supplements. Charcoal easily sticks to other substances and can make drugs like birth control or heart pills useless if taken together.
Folks with slow digestion, chronic constipation, or gastrointestinal blockages should talk to their doctors before reaching for charcoal. People with allergies to charcoal or any of the tablet’s other ingredients need to avoid it altogether. There are some risks for children—dosing is much lower, about 10-25 grams for poisonings, and always requires a doctor’s approval. Pregnant or nursing women should double check with their healthcare provider.
Drinking enough water makes a difference. Charcoal absorbs water along with toxins. If your body isn’t well hydrated, side effects like constipation and dehydration can get worse. I once tried activated charcoal for stomach bugs after a bad meal, and the gritty taste caught me off guard, but the worst part came from not chasing it with a second glass of water. Things got uncomfortable. Since then, I always make sure to follow recommendations and read dosing instructions carefully; little habits like this keep mistakes to a minimum.
The World Health Organization and the U.S. Food and Drug Administration both acknowledge medicinal charcoal as a safe over-the-counter remedy for certain digestive issues, as long as dosing guidelines are respected. Poison Control Centers list charcoal as a front-line treatment in emergencies, but only within a hospital. For day-to-day use—like with upset stomach—proper timing, spacing away from medications, and moderating the dose all prevent more harm than good. Using clean, pharmaceutical-grade charcoal puts your mind at ease when swallowing something black and gritty. Trust verified advice, stay hydrated, and err on the side of caution.
| Names | |
| Preferred IUPAC name | wood charcoal |
| Other names |
Activated Charcoal Activated Carbon Carbo Activatus Medicinal Carbon Vegetable Carbon |
| Pronunciation | /ˈmɛdɪsɪnəl ˈtʃɑːkəl/ |
| Identifiers | |
| CAS Number | 7440-44-0 |
| Beilstein Reference | 1721646 |
| ChEBI | CHEBI:33144 |
| ChEMBL | CHEMBL1209632 |
| ChemSpider | 31140421 |
| DrugBank | DB09278 |
| ECHA InfoCard | '100043-07-6' |
| EC Number | 215-609-9 |
| Gmelin Reference | 13793 |
| KEGG | C07245 |
| MeSH | D04AX—Charcoal |
| PubChem CID | 3571493 |
| RTECS number | FF6180000 |
| UNII | J2Z13MOL45 |
| UN number | UN3077 |
| CompTox Dashboard (EPA) | CompTox Dashboard (EPA) of product 767 Medicinal Charcoal BP EP USP Pharma Grade is DTXSID7020572 |
| Properties | |
| Chemical formula | C |
| Molar mass | 12.01 g/mol |
| Appearance | Black, fine, odorless, tasteless powder |
| Odor | Odorless |
| Density | 0.46 g/cm³ |
| Solubility in water | Insoluble in water |
| log P | 1.5 |
| Basicity (pKb) | 7.0 (pKb) |
| Magnetic susceptibility (χ) | Diamagnetic |
| Dipole moment | 0 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 105.0 J·K⁻¹·mol⁻¹ |
| Std enthalpy of formation (ΔfH⦵298) | 0 kJ/mol |
| Std enthalpy of combustion (ΔcH⦵298) | -393.5 kJ/mol |
| Pharmacology | |
| ATC code | A07BA01 |
| Hazards | |
| GHS labelling | GHS07, Warning, H319, Causes serious eye irritation. |
| Pictograms | GHS07,GHS08 |
| Signal word | Warning |
| Hazard statements | No hazard statements. |
| Precautionary statements | IF SWALLOWED: Rinse mouth. IF exposed or concerned: Get medical advice/attention. Store in a dry place. Keep container tightly closed. Dispose of contents/container in accordance with local/regional/national/international regulations. |
| NFPA 704 (fire diamond) | Health: 1, Flammability: 1, Instability: 0, Special: - |
| Explosive limits | No explosive limits were identified. |
| LD50 (median dose) | > 10,000 mg/kg (oral, rat) |
| PEL (Permissible) | PEL (Permissible Exposure Limit): 10 mg/m³ |
| REL (Recommended) | REL (Recommended Exposure Limit) for 767 Medicinal Charcoal BP EP USP Pharma Grade: 3 mg/m³ (respirable fraction), 10 mg/m³ (total dust) |
| Related compounds | |
| Related compounds |
Activated Carbon Carbon Black Bone Char Wood Charcoal |
Chengguan District, Lanzhou, Gansu, China
