According to the product database of Guoli Chemical, Polyethylene Glycol PEG-4000/6000 (CAS No.: 25322-68-3) is a non-ionic high molecular polymer, whose chemical essence is a linear polyether formed by the polymerization reaction of ethylene oxide (C₂H₄O). The molecular structure has hydroxyl groups (-OH) at both ends and repeating ethoxy units (-CH₂CH₂O-) in the middle, with the general formula HO(C₂H₄O)nH. Among them, the degree of polymerization n for PEG-4000 is approximately 70~85, with an average molecular weight in the range of 3400~4000; for PEG-6000, the degree of polymerization n is approximately 130~200, with an average molecular weight in the range of 5400~6600.
This product has extremely high purity, with an active content of ≥99%, and is a high-purity single-component polymer material. In terms of product composition, besides the main polymer component, it only contains trace impurities, including free alcohols (≤0.5%) and moisture (≤1.0%). The product does not contain components such as phosphate monoesters, phosphate diesters, or free phosphoric acid, nor does it contain tertiary amine components. It is a high-purity industrial raw material with a simple and clear chemical composition.
| Parameter Item | PEG-4000/6000 Indicator |
|---|---|
| Main Component | Polyethylene Glycol (Ethylene Oxide Polymer) |
| CAS No. | 25322-68-3 |
| Molecular Formula | HO(C₂H₄O)nH |
| Degree of Polymerization n | ≈70~200 |
| Average Molecular Weight | 3400~6600 |
| Active Content | ≥99% |
| Free Alcohols | ≤0.5% |
| Moisture | ≤1.0% |
| Ionic Type | Non-ionic |
| Appearance | White waxy solid or granules |
| Heat Resistance (Flash Point) | >240℃ |
| Heavy Metals (as Pb) | ≤10 mg/kg |
| Arsenic (As) | ≤2 mg/kg |
Due to its main component being high-purity polyethylene glycol polymer with clear functionality and extremely low impurity content, PEG-4000/6000 has good formulation controllability in the following application areas: in the pharmaceutical field as ointment bases, suppository bases, and pill carriers; in daily chemical products as toothpaste humectants and skincare excipients; in the textile industry as antistatic agents and lubricants; in the rubber and plastics industry as mold release agents; in the paper industry as coating lubricants. Because the content of heavy metals and arsenic is extremely low (≤10 mg/kg and ≤2 mg/kg respectively), it is particularly suitable for fields with strict purity requirements such as pharmaceuticals and personal care products.