Cetostearyl alcohol, often seen in pharmaceutical circles under names like cetearyl alcohol, stearyl alcohol, or cetyl-stearyl alcohol, took shape as the chemical industry advanced through the early-to-mid 20th century. The compound presented itself during a time when fats and oils started shifting from animal-based sources to vegetable-derived alternatives. In early applications, pharmacists and chemists aimed to use it as an emollient and stabilizer, drawn by its combination of long hydrocarbon chains. Over decades, companies responded to consumer requirements for improved texture in creams and ointments, so production scaled up. This boom for cetostearyl alcohol in beauty and pharmaceutical goods reflects broader shifts in trade regulations and reliance on plant-based resources. Its trajectory shows that once obscure industry inputs can gain prominence as demands in personal care and medicine evolve in tandem with advances in chemistry and regulatory standards.
The compound itself is a fatty alcohol blend, mainly a mix of cetyl (hexadecanol, C16) and stearyl (octadecanol, C18) alcohols, recognized in BP, EP, and USP pharmacopoeias. No consumer asks for “cetostearyl alcohol” at the pharmacy counter, but behind everyday lotions and hair conditioners sits this white, waxy solid, sometimes in flake or pellet form. As someone who’s read ingredient labels with skepticism, I appreciate the transparency that pharmacopoeia standards bring. Their inclusion means chemists and doctors can trust specific performance and safety benchmarks. The substance resists water, making it an ideal thickener, yet it slips easily onto skin without that heavy, greasy feeling. It feels clean and non-irritating compared with some of the old petroleum-based stabilizers that used to line medicine cabinets.
Standing up close, cetostearyl alcohol’s main claim to fame arises from two properties: its melting point, which typically falls between 50 and 60°C, and its insolubility in water. The compound appears white and solid at room temperature, blending only with heat. Each batch produced must hit specifications for assay (purity), saponification value, acid value, and iodine value. These numbers signal, for example, the proportion of fatty acid chains and potential for oxidization, all of which matter for product shelf-life and compound safety. In practice, chemists track these qualities to avoid degraded or impure materials entering medicines and cosmetics. What matters in a lab or manufacturing plant often comes down to reliable, proven consistency, and cetostearyl alcohol keeps showing up for this reason.
Cetostearyl alcohol meeting BP, EP, and USP grades must respect limits on heavy metals, microbial contamination, and particulates. Labels on bags or drums declare origin, batch, and analysis certificates. Lax quality can ruin entire product lots, so rigorous controls avoid chloride or sulfate residues and microbial hazards. The presence of a standardized certificate doesn’t just mark compliance; it builds the trust needed for reliable global supply chains. Technical sheets from top manufacturers provide the key specs—melting range, assay percentage, identifying test results—and often include production origins, whether coconut oil, palm oil, or synthetic processes.
Most cetostearyl alcohol today comes from fatty acids separated out of coconut or palm kernel oils. The process runs through hydrogenation, turning unsaturated hydrocarbons into saturated alcohols, which get isolated by distillation and cooling. In some regions, stearyl and cetyl alcohol are produced entirely by chemical synthesis from petroleum or plant feedstocks, depending on cost and environmental pressures. Refining methods keep evolving, driven by the need for low residual impurities and energy efficiency. The production chain involves not just technical chemistry but also attention to sustainability, especially in markets that scrutinize palm oil sourcing and waste streams.
Although cetostearyl alcohol looks chemically simple, it responds to a wide range of modifiers. Acid-catalyzed reactions can turn it into ethoxylated forms, which boost solubility and mildness in personal care formulas. Other common derivatizations tweak hydrophilic-lipophilic balance, letting manufacturers fine-tune how the molecule will work as an emulsifier or stabilizer. Standard esters, surfactants, and lubricants all stem from modifications that start with this base compound. Formulation chemists leverage these reactions to build custom solutions for everything from eye creams to topical antibiotics, pushing at the boundaries of what a fatty alcohol can do in the hands of creative researchers.
People know cetostearyl alcohol by several synonyms across regions and industries. “Cetearyl alcohol” sees most common use on cosmetic labels, while “cetyl-stearyl alcohol” or simply “stearyl alcohol” might appear in pharmaceutical records. Many suppliers sell under branded names to distinguish small differences linked to source purity or region, yet the chemistry remains consistent within global pharmacopoeias. Awareness of these variations proves helpful to anyone reading up on product safety records, exploring supply lists, or troubleshooting a formulation gone wrong.
Experience in production and lab spaces teaches that even “mild” ingredients demand respect. Cetostearyl alcohol enjoys a reputation for safety, but dust inhalation or skin contact over long hours can lead to mild irritation. Operators require gloves, safety glasses, and dust masks while transferring the raw material in bulk. Storage away from high heat and moisture avoids solidification problems and contamination. Regulatory agencies emphasize handling according to Hazard Communication Standards, promoting clear, unbroken chains of custody from supplier to end product. Safety Data Sheets (SDS) serve as essential references, summarizing risks and antidotes in case of accidental exposure or fire.
Drug and personal care product developers lean on cetostearyl alcohol for an unmatched balance between texture, consistency, and safety. Its role as a stabilizer and thickener shows up in ointments, creams, tablets, and countless gel forms. It locks in moisture in skin creams, provides structure in pharmaceutical lotions, and keeps water and oil from separating in emulsions. In tablet manufacture, it can also act as a binding or anti-stick agent. Food and industrial sectors have started using the compound too—in coating, release agents, and specialty lubricants—driven by its biocompatibility and long shelf life. If you rub a lotion into your hands or swallow a coated pill, there’s a strong chance this substance is behind the scenes, lending the finished product both its form and its long-term stability.
Industry R&D teams do not rest on tradition. Labs around the globe test greener extraction methods, look for ways to track and trace every drop back to its plant source, and continually screen for any residue that could undermine product purity. In consumer-driven markets, demand runs high for fully sustainable, RSPO-certified palm derivatives. Meanwhile, pharmaceutical teams dig into impurity profiles, checking for micro-contaminants that may slip through if the refining process cuts corners. Every incremental improvement in sustainability or chemical assay boosts global competitiveness, strengthens consumer trust, and supports a future where fatty alcohols uplift rather than exploit the environments from where they are sourced.
Toxicity studies across animal models and in vitro systems confirm that cetostearyl alcohol poses minimal threat at concentrations used in drugs and skincare goods. Extensive records show it triggers no major irritation or allergic response in most users. Still, researchers keep the spotlight on trace byproducts and degraded batches, aware that any synthetic chemical can go sour in the wrong hands. Regulators watch for evidence of chronic effects, including reproductive toxicity or environmental persistence. These large-scale studies set the guardrails for clinical safety and direct how new production sites train staff and design emergency protocols.
Markets change their tune each year, especially as consumers call out palm oil or synthetic ingredients with a record of deforestation or health risks. Next-generation cetostearyl alcohol leans harder on traceability and fermentation-derived feedstocks, which limit legacy environmental impacts. Biotechnologists in several countries seek enzyme catalysts that can replace old chemical reactors, cutting down energy and water use. Data transparency—not just purity—rises as a central expectation from product buyers and regulators alike. The chemical’s future sits in smart sourcing, scaled bio-production, and collaborative oversight linking environmental stewards, corporate chemists, and medical researchers. Meeting those demands will signal not just industry maturity but a real step forward for sustainable chemistry that puts both people and the planet first.
Walk into any pharmacy or pick up a lotion bottle, and you’re likely holding something made with cetostearyl alcohol. The name might sound intimidating, almost like something you’d expect to find inside a chemistry lab rather than in skincare or medicines. But it’s basically a mix of two fatty alcohols—cetyl and stearyl—sourced from coconut or palm oil. Over years spent working in pharmaceutical R&D, I’ve seen how this ingredient doesn’t just help make products creamy. It shapes how medicines work, how they feel, and how people use them.
Some people see the word ‘alcohol’ and worry about drying or irritation. Cetostearyl alcohol, though, acts differently. It’s a waxy solid, not a harsh liquid. Its real talent comes from its texture. Rub a cream containing it between your fingers and notice how it feels smooth, never greasy or sticky. This texture comes from its ability to form emulsions, letting oil and water mix together and stay that way. Medicines need stable emulsions, especially in creams for eczema or pain. If you’ve ever had a lotion separate or go watery, it probably didn’t have enough stabilizer like cetostearyl alcohol.
Not all cetostearyl alcohol is the same. Pharmacies and labs only trust batches that meet strict purity standards. BP, EP, and USP are three pharmacopoeias—rulebooks for quality—across Britain, Europe, and the US. These standards ensure that traces of impurities or leftover plant oils don’t sneak through. From my years in pharma supply chains, I learned that switching to a lower grade can lead to recalls from problems ranging from batch separation to allergic reactions.
Doctors and pharmacists always look for ingredients with a solid safety track record. Cetostearyl alcohol rarely triggers allergic reactions compared to other additives. Still, nothing is completely risk-free; some rare cases of contact dermatitis show up, usually in people with ultra-sensitive skin. The medical field relies on decades of data, showing that this ingredient doesn’t enter the bloodstream through the skin nor interact with active pharmaceutical compounds. That kind of safety, confirmed through extensive studies and reporting, puts patients—and prescribers—at ease.
Daily, millions use creams, ointments, tablets, and capsules built around cetostearyl alcohol. Topical drugs count on its solidifying and emulsifying powers, giving ointments the right firmness so they stay on skin longer. In pills, it stops things from crumbling or clumping, so each dose remains consistent. Over-the-counter pain creams, antifungals, and simple moisturizers all lever cetostearyl alcohol for its reliable physical properties.
Sourcing and sustainability have become big topics in every pharmaceutical boardroom. The next challenge won’t just focus on purity or function, but on how ingredients like cetostearyl alcohol are made. Plant oils should come from ethical, environmentally sound sources. Good suppliers provide traceability paperwork proving they protect rainforests and treat workers fairly. By choosing the right partners, the pharmaceutical world can keep making safe, quality medicines without cutting corners on people or the planet.
Cetostearyl alcohol, which blends cetyl and stearyl alcohols, pops up everywhere—from creams to shampoos, and even in tablet coatings. It acts as both an emollient and an emulsifier, giving products their texture and helping keep oil and water together. Every time someone applies a moisturizer or swallows a coated pill, this ingredient pulls its weight, but not all cetostearyl alcohol works the same. The standards set in the British Pharmacopoeia (BP), European Pharmacopoeia (EP), and United States Pharmacopeia (USP) keep this raw material up to snuff, protecting both users and manufacturers.
All three pharmacopoeias expect cetostearyl alcohol to contain a careful balance of cetyl (about C16) and stearyl (about C18) alcohols. This balance decides how well it performs in different settings. The BP, for example, wants to see a composition of 40–70% cetyl alcohol and 20–50% stearyl alcohol. The EP holds similar values, focusing on a 50:50 blend, but both pharmacopeias let some flexibility in the precise ratio, so manufacturers can tailor batches to different formulations. The USP lands in a similar neighborhood with its ratio.
Color and appearance get close attention, too, for good reason. No one wants unexpected coloration or clumping in a lotion or medicine. BP and EP agree on cetostearyl alcohol arriving as white, waxy flakes, pellets, or granules. To ensure consistent outcomes, the “acid value” (a measure of any free acids) stays tightly limited, always under 0.5. Too much acid and a cream spoils or a medicine sours.
Heavy metals pose another concern. BP and EP both hold the line at no more than 10 ppm. This level keeps contaminants from sneaking into health products, which could otherwise build up or cause allergic reactions. The USP raises the bar on heavy metals, aiming for under 0.001%—an even stricter safeguard.
Water content matters because too much moisture invites bacteria or ruins the final feel and function. BP and EP set a 0.5% moisture ceiling, using Karl Fischer titration for accuracy. Samples with too much water never pass.
Different pharmacopoeias set their own minimum levels for what they regard as “pure” cetostearyl alcohol, but all require not less than 98.0% pure material, measured by gas chromatography. This leaves little room for impurities, ensuring the alcohol doesn’t carry unwanted chemicals into creams and tablets. Deviating from these figures risks unpredictable reactions or loss of product performance.
Sulphated ash—a measure of inorganic residues after burning—gets capped at 0.1% by BP, EP, and USP. This standard roots out trace contaminants from manufacturing, like leftover catalysts or mineral dust.
Years of working with personal care and pharma companies taught me that even small failures in these specs cause headaches down the line. Cutting corners or letting in off-spec batches shortchanges everyone. Patients and consumers trust that creams, lotions, and pills are safe and stable. If the raw alcohol brings hidden impurities, odd scents, or excess metals, it’s not just a product loss—it undercuts trust in whole categories of goods.
Solid answers start by demanding certificates of analysis from suppliers. Walking through the supply chain, the best labs test every batch for all the key values—purity, acid content, water, and heavy metals. Pharmacopeial monographs don’t just act as paperwork; they give technical teams the numbers they must actually see in their reports. Where possible, third-party audits of suppliers create a check on the system, finding weak points before products reach customers.
Each time a supplier gets pressed on test results or documentation, it strengthens the whole industry. People behind the scenes—the chemists, quality managers, importers—carry a responsibility not only to a list of standards but to every person putting cream on a baby’s skin or taking a daily medication. That sense of duty keeps the focus on doing things right, not just meeting baseline numbers.
Cetostearyl alcohol shows up a lot in creams, ointments, and even a few oral medications. Most people hear the word “alcohol” and get nervous, thinking of harsh or drying effects. Cetostearyl alcohol works quite differently. This ingredient comes from vegetable oils and is actually a mix of two fatty alcohols—cetyl and stearyl. It gives lotions that silky, spreadable feel and keeps water and oil from separating, creating a stable, pleasant product.
Pharmaceutical and cosmetic scientists have checked out cetostearyl alcohol for years. Bodies like the U.S. Food and Drug Administration and the European Medicines Agency authorize it for topical use in both prescription formulas and over-the-counter creams and lotions. Researchers haven’t turned up solid evidence linking cetostearyl alcohol to toxicity when used externally or in regulated quantities in oral products.
In topical products, people with especially sensitive skin sometimes experience mild irritation or an allergic reaction. The American Contact Dermatitis Society lists cetostearyl alcohol as a “fatty alcohol,” which helps skin instead of stripping it. For most, it causes no harm and actually softens and protects the skin barrier. Data shows that less than 2% of people tested react to it unfavorably. Those with eczema or atopic dermatitis should still pay attention to ingredient lists and talk to a dermatologist before trying new creams.
Oral medications use cetostearyl alcohol to help active ingredients dissolve or to create controlled-release formulations. These products undergo strict testing before approval. The body doesn’t absorb much of this ingredient, so it passes through without breaking down into harmful compounds. The U.S. Pharmacopeia monograph on cetostearyl alcohol provides quality and safety standards that manufacturers must follow.
A few studies focus on patients who ingest larger quantities continuously, like those taking special dietary supplements or medications in waxy tablet forms. Toxicologists note these doses remain low, and the body handles them without evidence of buildup or damage.
Quality and regulation make a real difference. Reputable brands test their products and follow limits set by health authorities. Sensitive individuals can watch for signs of irritation or allergies and try patch-testing unfamiliar products. Health professionals play a big role in educating patients and reporting rare problems, which helps improve product quality for everyone.
Calling something “natural” or “synthetic” doesn’t paint the whole picture. Cetostearyl alcohol proves that ingredients from either source can be both effective and low-risk when developed responsibly. For anyone managing sensitive skin or new prescriptions, an open conversation with a doctor or pharmacist offers a smart way forward.
Manufacturers keep seeking milder, plant-based ingredients with transparent sourcing. Public interest in allergen-free and low-irritant formulas pushes the industry to stay current on research. Consumers who care about skin health, safety, and trustworthy pharmaceutical products benefit from these improvements. The history and research behind cetostearyl alcohol show that not all “alcohols” in medicine or cosmetics create problems—many actually offer safe, gentle benefits that help people manage daily skin and health needs.
Cetostearyl alcohol plays a crucial role in pharmaceutical and personal care products. In production settings I’ve seen, packaging size remains a big deal for both cost and efficiency. Manufacturers ship cetostearyl alcohol pharma grade in bags of 25 kilograms more often than other sizes. These woven polypropylene sacks, lined with plastic, guard the product from moisture and dust during transport. Drums, usually plastic or sometimes fiber, offer a 50-kilogram size as the next step up. For bulk buyers, high-volume amounts move in lined jumbo bags—think 500 or even 1,000 kilograms—supported by a pallet for logistics. These bulk bags work best in factory environments with the gear to handle large weights.
Large-scale producers sometimes use custom packaging upon request. Still, the 25-kilogram sack mostly rules—easy to lift, stack, and count. Distributors often remark that having the right size package cuts warehouse waste and makes traceability more straightforward, which helps during FDA inspections or customer audits.
Cetostearyl alcohol acts like a white, waxy solid at room temperature, giving a false sense of security. Too much heat or sunlight can weaken it before manufacturing even starts. Warehouses lacking climate control often deal with softening, sticking, or caking, all of which bring processing headaches. That frustrates everyone in the supply chain from mill to mixing room. I’ve walked into storerooms where poor packaging let ambient humidity cause clumping—small mistakes like that turn into rejections or, worse, contaminated batches.
Smart storage focuses on cool, dry, and shaded areas—ideally below 30°C, away from sunlight or any heat source. This keeps the product solid and easy to weigh. Dryness trumps everything: cetostearyl alcohol attracts water from the air and gains weight in the process, which can throw off dosing and, ultimately, product consistency. Sealed containers, stacked off the floor, foil the creeping effects of dampness and accidental spills. Pest-free, well-ventilated rooms also help, particularly in climates where monsoon season brings sudden jumps in humidity.
GMP and pharmacopeial standards dictate not only purity but also packaging and storage rules. Auditors pay close attention to labeled weights and intact packaging as points of quality control. Reusing bags or letting seals break can compromise the whole batch's integrity. Forgetting a small hole in the liner or scraping open a sack with a knife allows contamination or air ingress. In regulated industries, that equals lost money and possible recalls.
By sticking with tested packaging sizes and proven storage conditions, companies support patient safety as well as regulatory compliance. Adopting humidity logging, steel shelving, regular stock checks, and clear labeling build a strong foundation. This doesn’t just check boxes for certification—it actually lowers loss rates and upholds medication quality.
Suppliers, manufacturers, and distributors all have a role in chasing higher standards. Simple solutions carry weight: regular staff training on packaging handling, moisture-proofing storerooms with dehumidifiers, and better rotation practices all help. Retailers who pass along storage instructions to the next step keep problems from cropping up downstream. Using transparent supplier audits ensures everyone follows the rules—tracing quality from refinery to finished product.
A Certificate of Analysis (COA) and a Material Safety Data Sheet (MSDS) are more than paperwork for pharmaceutical-grade chemicals like Cetostearyl Alcohol. They signal that a supplier stands by its product. Pharmacies, formulators, and manufacturers don’t just ask for these out of habit but out of necessity. These documents lay out a foundation for accountability, clarity, and traceability.
A COA should never be an afterthought. This sheet spells out the chemical’s physical and chemical properties, purity, and test results, mapped against the reference standards of BP (British Pharmacopoeia), EP (European Pharmacopoeia), and USP (United States Pharmacopeia). For Cetostearyl Alcohol, COAs typically list content range, say, 95-100%, limits for impurities, melting point, acid value, saponification value, and appearance. A COA that matches regulatory standards gives purchasing teams and quality control experts the confidence to move forward.
Every time our lab sources Cetostearyl Alcohol, a COA comes with each batch. Sometimes differences in melting point or pH surface between batches. Without batch-specific documentation, tracking issues back to their source would turn into a guessing game. Relying on consistent documentation from vendors creates a safety net.
Safety in handling, transporting, and storing chemicals gets the spotlight in an MSDS. These sheets break up information by exposure risk, fire-fighting measures, disposal protocols, physical hazards, and personal protective gear suggestions. In some environments, a slip in understanding fire risk or inhalation hazards can cause real harm. Even with its low toxicity, Cetostearyl Alcohol needs clear handling instructions because skin and eye irritation are common issues when working with raw chemical powders.
If you’ve trained new staff in a production facility, you’ve likely walked them through reading an MSDS line by line. Workers shouldn’t rely on memory alone or underplay risks they haven’t seen up close. During a routine inspection, having an MSDS on hand isn’t just expected; inspectors will shut down operations until it surfaces. I’ve seen entire production runs delayed this way.
Requests for COA and MSDS for Cetostearyl Alcohol are just as important as the product sample. Regulatory bodies like the FDA and EMA mandate these documents for good reason. Companies that try to cut corners, skipping proper documentation, run the risk of fines, recalls, and worse, loss of public trust. Mistakes can damage reputation quickly, and in the pharma world, trust builds slowly but falls fast.
Companies strengthen their processes by integrating documentation requests into all procurement and quality control protocols. Train staff to read and question every detail in a COA and MSDS. Digital inventory systems can attach documents batch-by-batch, making them available for every audit or internal review. Suppliers who hesitate or delay in providing these documents often raise a red flag—it pays to forge relationships with those who meet documentation requests openly, promptly, and accurately.
In laboratory and manufacturing environments, these papers serve as more than compliance tools—they protect people, keep records reliable, and make it clear that safety isn’t just a line in a handbook, but a practiced value.
Names | |
Preferred IUPAC name | hexadecan-1-ol and octadecan-1-ol |
Other names |
Cetearyl Alcohol Cetylstearyl Alcohol C16-18 Alcohols Cetyl/Stearyl Alcohol Alcohols, C16-18 |
Pronunciation | /ˌsiːtəʊˌstiːriːl ˈælkəhɒl/ |
Identifiers | |
CAS Number | 67762-27-0 |
Beilstein Reference | 1772326 |
ChEBI | CHEBI:53050 |
ChEMBL | CHEBI:53039 |
ChemSpider | 54649 |
DrugBank | DB06750 |
ECHA InfoCard | 08aab7a3-bd34-420a-b964-b341c29c6d31 |
EC Number | 200-677-5 |
Gmelin Reference | 13610 |
KEGG | C01356 |
MeSH | D002456 |
PubChem CID | 8221 |
RTECS number | GV9840000 |
UNII | YA7E5R7S5R |
UN number | UN1993 |
CompTox Dashboard (EPA) | DTXSID3087266 |
Properties | |
Chemical formula | C16H34O·C18H38O |
Molar mass | 284.48 g/mol |
Appearance | White, waxy solid flakes or granules |
Odor | Characteristic |
Density | 0.81 g/cm³ |
Solubility in water | Insoluble in water |
log P | 4.5 |
Vapor pressure | Negligible |
Acidity (pKa) | pKa > 14 |
Basicity (pKb) | pKb: 15.0 |
Magnetic susceptibility (χ) | Diamagnetic |
Refractive index (nD) | 1.428 |
Viscosity | Viscosity: 20-30 cP (at 70°C) |
Dipole moment | 1.69 D |
Thermochemistry | |
Std molar entropy (S⦵298) | Std molar entropy (S⦵298) of Cetostearyl Alcohol: 510 J·mol⁻¹·K⁻¹ |
Std enthalpy of combustion (ΔcH⦵298) | -3620 kJ/mol |
Pharmacology | |
ATC code | D04AA20 |
Hazards | |
Main hazards | May cause eye and skin irritation. |
GHS labelling | GHS labelling: Not classified as hazardous according to GHS. |
Pictograms | GHS07 |
Signal word | Non-hazardous |
Hazard statements | Hazard statements: Not a hazardous substance or mixture according to Regulation (EC) No. 1272/2008. |
Precautionary statements | Precautionary statements: P261, P305+P351+P338, P337+P313, P264, P280, P302+P352, P332+P313, P362+P364 |
NFPA 704 (fire diamond) | 1-1-0 |
Flash point | > 200 °C |
Autoignition temperature | > 365°C |
Lethal dose or concentration | LD50 (Rat, oral) > 5,000 mg/kg |
LD50 (median dose) | LD50 (median dose): >5000 mg/kg (oral, rat) |
NIOSH | 8005-44-5 |
PEL (Permissible) | 10 mg/m³ |
REL (Recommended) | 5 mg/kg bw |
IDLH (Immediate danger) | Not established |
Related compounds | |
Related compounds |
Stearyl alcohol Cetyl alcohol Ceteareth Cetearyl glucoside Lanolin alcohols Ethoxylated cetostearyl alcohol |