Polyethylene Glycol 6000(PEG-6000)
Polyethylene Glycol 6000 (PEG-6000) is a polymer of ethylene oxide, a type of polyethylene glycol (PEG) with an average molecular weight of 6000 g/mol. PEGs are available in various molecular weights, with PEG-6000 being one of the higher molecular weight varieties.
Applications of Polyethylene Glycol 6000
- Pharmaceuticals: Used as a base for ointments, creams, and as a solvent or stabilizer in drug formulations.
- Cosmetics: Functions as a humectant, lubricant, and thickener in skincare products.
- Industrial Uses: Serves as a lubricant, dispersing agent, and in the production of plastic films and sheets.
- Biotechnology: Employed in processes like protein purification and in cryopreservation.
Properties of PEG-6000:
- Molecular Formula: H(OCH₂CH₂)nOH
- Molecular Weight: Approximately 6000 g/mol
- Appearance: White, waxy solid or flakes
- Solubility: Soluble in water and various organic solvents (e.g., ethanol, acetone)
Specific Uses of PEG-6000
- Pharmaceuticals:
– Tablet Coating and Binding: PEG-6000 is often used in solid dosage forms like tablets and capsules. It acts as a binder, helping to hold the tablet components together, and as a coating agent to improve the appearance and control the release of the active ingredient.
– Drug Solubility and Stability: It can enhance the solubility of poorly water-soluble drugs and stabilize formulations by preventing the crystallization of drug substances.
– Suppositories: Due to its solid state at room temperature and ability to melt at body temperature, PEG-6000 is used in the production of suppositories, ensuring proper release of the active ingredients. - Cosmetics:
– Moisturizers and Lotions: PEG-6000 acts as a humectant, drawing moisture to the skin and enhancing hydration. It’s also used as a thickening agent in lotions, creams, and other skincare products to improve texture and consistency.
– Hair Care Products: In shampoos and conditioners, PEG-6000 helps in thickening the product, providing a smoother application, and acting as a conditioning agent. - Industrial Uses:
– Plastic Production: PEG-6000 is used as a plasticizer in the production of plastics and resins, improving flexibility and workability.
– Lubricants: It serves as a lubricant in various mechanical and industrial applications, reducing friction between surfaces and improving the lifespan of machinery parts.
– Paints and Coatings: In the manufacturing of paints and varnishes, PEG-6000 is used to control viscosity and improve the spreadability of the product. - Biotechnology:
– Protein Purification: PEG-6000 is employed in the purification of proteins through a process called “PEG precipitation,” where it helps in selectively precipitating proteins from solution.
– Cryopreservation: It is used as a cryoprotectant to protect biological tissues and cells during freezing, preventing ice crystal formation that can damage cell structure.

Safety Guidelines
- General Safety:
– PEG-6000 is generally considered non-toxic and safe for use in pharmaceuticals, cosmetics, and food products.
– It is non-irritating and non-sensitizing in most cases, though high concentrations or prolonged exposure can lead to skin irritation, particularly in individuals with sensitive skin. - Handling and Storage:
– Store in a cool, dry place away from direct sunlight and moisture to maintain its stability and prevent degradation.
– Use personal protective equipment (gloves, goggles) when handling large quantities to avoid prolonged skin or eye contact. - Environmental Impact:
– PEG-6000 is biodegradable, and its environmental impact is relatively low. However, proper disposal according to local regulations should be followed to minimize any potential environmental harm. - Regulatory Considerations:
– PEG-6000 is approved for use by various regulatory bodies, including the FDA, for specific applications in food, cosmetics, and pharmaceuticals.
– It is important to adhere to the concentration limits set by these regulatory authorities to ensure safety and efficacy in its intended use.
Technical Data Sheet PEG-6000
| TEST | STANDARD | RESULT | Unit | Ref |
| Description | practically odortess and tasteless , white ,waxy, plastic material having a consistency similar to beeswax, or as creamy white flakes, beads, or powders | Camplies | – | USP43-NF38 |
| Solubility | freely soluble in water, soluble in acetone, alcohol, chloroforrn .ethylene glycol monomethyl ether , ethyl acetate, and in toluene; insoluble in ether and in hexane | Camplies | – | USP43-NF38 |
| Color of Solution, 5g/50ml of Water | Slightly Hazy | Slightly Hazy | – | USP43-NF38 |
| Viscosity @98.9 | 250-390 | 312.6 | Cst | USP43-NF38 |
| PH, 5% Solution in Water | 4.5-7.5 | 6.4 | – | USP43-NF38 |
| Residue on ignition | Max 0.1 | 0.05 | %wt | USP43-NF38 |
| Assayn(Averege Molecular Weight) | 5400-6600 | 62.36 | g/mol | USP43-NF38 |
| Ethylene Oxide @ 1.4-Dioxane | Ethylene Oxide NMT 10.0 | 0.9 | mg/g | USP43-NF38 |
| 1.4-Dioxane NMT 10.0 | 2 | USP43-NF38 | ||
| Residual solvents | Defined as Organic volatile chemicals | Not Used | ppm | USP43-NF38 |



