PEG
- Createtime： 2026-06-22
- Updatetime： 2026-07-24
Product Details
| useage |
Industrial use
|
| deliveryInfo |
|
| appearance |
liquid
|
| aliasen |
|
| supplyCapacity |
5000MT/Month
|
| harbor |
Qingdao,China
|
| minorder |
1KG
|
| Molecular Formula |
HO(C2H4O)nH
|
| Appearance |
Colorless transparent viscous liquid
|
1. Basic Product Profile
- Full Name: Polyethylene Glycol
- Aliases: Macrogol, Polyoxyethylene glycol
- CAS Number: 25322-68-3
- EINECS: N/A
- Molecular Formula: HO(C2H4O)nH
- Chemical Classification: Nonionic polyether polymer, pharmaceutical excipient, cosmetic humectant, chemical solvent, food additive
- Core Advantages
Water-soluble, low toxicity, good biocompatibility, wide viscosity range from liquid to solid wax. Excellent solubilizing, moisturizing, lubricating and dispersing performance, widely used in pharmacy, cosmetics, food, coating, textile and fine chemical industries.
2. Physical & Chemical Properties
2.1 Physical Index
- Appearance： Colorless transparent viscous liquid
- Odor: Odorless
- Solubility: Fully miscible with water, methanol, ethanol; partially soluble in acetone; insoluble in aliphatic hydrocarbon, mineral oil
- pH (5% aqueous solution): 5.0 ~ 7.0 neutral
- Hygroscopy: Liquid PEG strong hygroscopicity; solid PEG slight hygroscopicity
- Melting point: Rise with molecular weight, PEG4000 ~ 53–56℃, PEG6000 ~ 58–62℃
2.2 Chemical Properties
- Polyether chain structure: Contains terminal hydroxyl groups, can conduct esterification, etherification reaction to synthesize PEG derivatives (MPEG, PEGDMA etc.)
- Thermal stability: Stable below 120℃; above 200℃ thermal oxidative degradation, generates aldehyde and acid impurities
- Acid & alkali resistance: Stable in weak acid, neutral and weak alkali medium; concentrated strong alkali under high temperature accelerates chain breaking
- Compatibility: Compatible with most surfactants, oils, inorganic salts; compatible with many resin raw materials
3. Main Application Fields
3.1 Pharmaceutical Industry (Core Usage)
Ointment base, suppository matrix, tablet binder, solubilizer for injections, coating agent for sustained release tablets, solvent for oral liquid; meets USP/EP/FCC medical grade standard.
3.2 Cosmetic & Personal Care
Humectant for facial cream, essence, shampoo; lubricant for makeup; solubilizer for essence oil, improves skin softness and moisture retention.
3.3 Food Additive
Food grade PEG as lubricant for candy, anti-caking agent for food powder, coating agent for food preservation.
3.4 Fine Chemical & Textile
Dispersant for pigment, lubricant for fiber spinning, plasticizer for resin, mold release agent for casting.
3.5 Biological Experiment Reagent
Phase separation medium for protein purification, cryoprotectant for cell preservation.
4. Quality Specification Table
| Test Item | Standard Index |
| CAS No. | 25322-68-3 |
| Molecular Formula | HO(C2H4O)nH |
| Appearance | Liquid / White waxy solid (depends on molecular weight) |
| Average Molecular Weight | 200 / 400 / 600 / 1000 / 4000 / 6000 customizable |
| pH (5% Water Solution) | 5.0 ~ 7.0 |
| Water Content (KF) | ≤0.50% |
| Heavy Metals (Pb) | ≤10 ppm (Pharm/Food Grade) |
| Residue on Ignition | ≤0.10% |
| Bulk Package | 200L plastic drum (liquid); 25kg woven bag with PE liner (solid) |
| Sample Package | 1L / 5L bottle (liquid); 1kg / 5kg plastic bag (solid) |
| Storage Requirements | Sealed cool dry warehouse ≤30℃; isolate high temperature and strong oxidants |
| Transportation Rule | Non-hazardous general chemical, waterproof packaging required |
| Shelf Life | 24 months under intact sealed packaging |
