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Polyethylene Glycol Stearate BP EP USP Pharma Grade stands out as a non-ionic surfactant with a dual nature, combining the properties of polyethylene glycol with stearic acid. This chemical forms through the esterification of stearic acid and polyethylene glycol, blending their strengths into a material known for its gentle surfactant and emulsifying characteristics. You find it everywhere from pharmaceuticals to cosmetics, where its texture, solubility, and safety record give it a real-world edge over harsher or less predictable alternatives.
This compound usually appears in the market either as a white, waxy solid, pearly flakes, powder, or sometimes as soft pearls. Its physical state shifts depending on the grade and specified molecular weight—lower weights might dissolve into liquid at slightly higher temperatures than the solid flakes or crystal powders. Polyethylene Glycol Stearate remains stable under room conditions, resisting breakdown or drastic change in reasonable humidity or light exposure.
Structurally, it falls into the chemical class of esters, with a backbone derived from long polyethylene glycol chains capped with a stearic acid group. The general formula follows (C2H4O)nC18H36O2, where “n” indicates the repeating units typical of the polyethylene glycol portion. This configuration gives it water-dispersibility without losing the thickening or emulsifying effect needed in creams, ointments, and other drug delivery systems.
Polyethylene Glycol Stearate blends in well with both water and lipid environments thanks to its dual molecular character—part water-loving, part oil-loving. This amphiphilic property translates into easy dispersion in solutions, which matters when producing finished pharmaceutical materials or mixing stable cosmetic emulsions. Its density ranges around 0.95 to 1.05 g/cm³, and it melts at about 50-60°C, allowing for flexibility in how it gets processed, from a heat-melt step to a cold-mix method if the process lines dictate.
This material works as an effective solubilizer and thickener, too, helping boost consistency in ointments and suspensions. In tablet making, it can jump in as a lubricant or a coating agent, controlling how a pill dissolves or how quickly it slips through packaging machinery. Because it absorbs some water, it helps keep finished products moist and shelf-stable, resisting drying and cracking in both food and pharma applications.
Quality standards for Polyethylene Glycol Stearate BP EP USP Pharma Grade follow pharmacopeial requirements, tracking assays, viscosity, and purity. You’ll see grades classified by the molecular weight of the PEG chain: PEG-8 Stearate, PEG-32 Stearate, and others. Each brings different melting, solubility, and thickening qualities—the higher the PEG number, the more water it attracts and the thicker it gets.
You’ll also encounter packaging forms meant to ease dosing and mixing: 25kg fiber drums or lined polyethylene bags, with safety and labeling supporting regulated pharmaceutical or food-contact use. Its HS Code lands under 34021300, a categorization that helps customs and regulators track its cross-border use for industrial, personal care, and medical applications.
Polyethylene Glycol Stearate’s safety record sits strong, with a low toxicity profile documented across regulatory reviews. It is not considered hazardous under most global standards and doesn’t irritate skin or mucous membranes in normal concentrations. During handling, smart practice means avoiding excessive dust generation—breathing powder can cause some discomfort, like with many fine substances.
It lacks strong reactivity, and under proper storage conditions—sealed, in cool and dry spaces—it resists degradation and spoilage. Clean water or mild detergents will remove residues from surfaces or equipment. Polyethylene Glycol Stearate does not fall under special hazardous goods regulations for shipping.
In my experience across industrial labs and manufacturing sites, Polyethylene Glycol Stearate brings value through its ability to stabilize difficult mixtures. In tablet production, it prevents sticking to molds and supplies a smooth finish, supporting fast, consistent output. In creams and lotions, it keeps oil and water phases tied together, holding up after months on a store shelf without splitting or turning grainy.
Pharmaceutical companies pick this ingredient because it supports reproducible outcomes at scale—dissolving fast, resisting breakdown in storage, holding its viscosity under different temperatures, and not leaving behind a chemical aftertaste or odor. Using this compound takes the guesswork out of formulation design, translating directly into better, safer, and more predictable medicine and supplement production.
The key comes down to awareness and training—teaching mixers and formulators what to expect from different molecular weights, knowing how much water to add, and monitoring blending temperatures. Applying facts and established guidelines from BP, EP, and USP monographs, teams avoid common headaches that come from switching between batches or suppliers. With this approach, Polyethylene Glycol Stearate steps up as a raw material that stands behind reliable, quality-first production tailored for regulated markets.
Chengguan District, Lanzhou, Gansu, China
