Polyethylene Glycol CAS 25322-68-3, Polyethylene Glycol, CAS 25322-68-3
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Polyethylene Glycol CAS 25322-68-3 relationship between molecular weight and state of matter.
25322-68-3
HO(CH₂CH₂O)ₙH
0
500-038-2
| CAS | 25322-68-3 |
| Molecular formula | HO(CH₂CH₂O)ₙH |
| Molecular weight | 0 |
| EIENCS | 500-038-2 |
| Form | waxy solid |
| Melting point | 64-66 °C |
| boling point | >250°C |
| Density | 1.27 g/mL at 25 °C |
| Solubility | H2O: 50 mg/mL, clear, colorless |
| PKA | / |
| Color | White to very pale yellow |
| Storage temp |
The relationship between molecular weight and state of matter
Liquids: PEG-200, 400, 600 (Molecular weight 200-600)
Semi-solid/waxy: PEG-800 to 6000 (molecular weight 800-7500)
Solid: PEG-8000 or above (molecular weight > 7500).
Medicine and Cosmetics
Drug carrier: Used as the base of ointment and plasticizer for suppositories (PEG-4000/6000).
Moisturizer: Replace glycerin in skin care products to enhance flexibility (PEG-200-1000).
Industrial field
Lubricant: High-temperature lubrication in metal processing and rubber vulcanization (PEG-1500~6000).
Dispersants/emulsifiers: Pesticides, coatings, textile auxiliaries (molecular weight selected as required).
Others: Papermaking auxiliaries, ceramic molding agents, antistatic agents for food processing, etc.
Health risk
Low toxicity: The oral LD₅₀ of rats is 28,000-33,750 mg/kg, which belongs to the actual non-toxic level.
Irritation: Contact with mucous membranes may cause mild irritation (such as in the eyes and respiratory tract), but skin contact is safe.
Special note: When the concentration of the injection exceeds 40%, hemolysis may occur. Oral administration of large doses can cause diarrhea.
Environment and Operation
Environmental risk: Toxic to aquatic organisms. Avoid release into water bodies.
Protective measures: Wear gloves/goggles during operation and store in a sealed container in a cool and well-ventilated place (≤40℃).
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