Methoxypolyethylene Glycol 500 (MPEG 500)
Methoxypolyethylene Glycol 500 (MPEG 500)
CAS No.:9004-74-4
Molecular Formula:CH₃O-(C₂H₄O)ₙ-OH, average n≈11
Average Molecular Weight:~500 g/mol
1. Product Identification
- Product Name:Methoxypolyethylene Glycol 500
- Synonyms:MPEG 500, Poly(ethylene glycol) methyl ether 500, mPEG 500
- Appearance:Clear, colorless to pale yellow viscous liquid
- Grade:Industrial grade
2. Physical and Chemical Properties
- Physical State:Liquid
- Hydroxyl Value:105–115 mg KOH/g
- pH (5% aqueous solution):5.0–7.0
- Moisture:≤0.5%
- Color (APHA):≤50
- Solubility:Soluble in water, ethanol, acetone and many organic solvents
- Flash Point:>150 °C (closed cup)
- Viscosity:Low viscosity liquid at room temperature
- Storage Conditions:Store in dry, cool, well-ventilated area; keep containers tightly sealed; avoid moisture and direct sunlight
3. Hazard Identification
- GHS Classification:Not classified as hazardous
- Skin/eye Contact:Mildly irritating; avoid prolonged contact
- Environmental Hazard:Not classified as hazardous to aquatic environment
4. Packaging
- Standard Packaging:25 kg drum, 50 kg drum, 200 kg drum
- Custom Packaging:Available upon request
5. Application
- Used as emulsifier, dispersant, wetting agent
- Intermediate for chemical synthesis
- Used in cosmetics, detergents, lubricants and polymer modification
6. Stability and Reactivity
- Stability:Stable under normal storage and handling conditions
- Incompatibility:Strong oxidizing agents
- Hazardous Decomposition Products:No hazardous decomposition under normal conditions
7. Handling and Storage
- Handling:Use in well-ventilated area; avoid contact with eyes and skin
- Storage:Store between 5–35 °C; protect from moisture and heat; keep away from strong oxidizers
8. Typical Specifications
| Item | Specification |
|---|---|
| Appearance | Clear liquid, colorless to pale yellow |
| Average Molecular Weight | 480–520 g/mol |
| Moisture | ≤0.5% |
| pH (5% H₂O) | 5.0–7.0 |
| Color (APHA) | ≤50 |

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