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Pharmaceutical Intermediates
Polyoxyethylene Stearate
Polyoxyethylene (100) Stearate / PEG-100 Stearate (S100)
1. Product Identification
- Product Name: Polyoxyethylene (100) Stearate (S100)
- Synonyms: PEG-100 Stearate, Polyethylene Glycol Monostearate, Myrj S100, Polyoxyl 100 Stearate
- CAS No. : 9004-99-3
- HS Code : 3402.13.0090
- Chemical Type : Non-ionic surfactant (Polyethylene glycol ester)
- Formula : (C₂H₄O)nC₁₈H₃₆O₂ (n≈100)
- Average Molecular Weight : ~4,670 g/mol
2. Specifications (Typical)
| Item | Specification | Test Method |
|---|---|---|
| Active Content | 98.0% min. | Titration/HPLC |
| Appearance (25°C) | White to off-white waxy solid, flakes or beads | Visual |
| Melting Point | 48–60 °C | Capillary method |
| HLB Value | 16–18 | Calculation |
| pH (1% aqueous) | 5.0–7.0 | pH meter |
| Moisture | ≤1.0% | Karl Fischer |
| Acid Value | ≤5.0 mg KOH/g | Titration |
| Saponification Value | 5–25 mg KOH/g | Titration |
| Hydroxyl Value | 13–25 mg KOH/g | Titration |
| Heavy Metals (Pb) | ≤10 ppm | AAS/ICP |
3. Physical & Chemical Properties
- Physical State : Solid (waxy flakes/beads)
- Odor : Mild, characteristic fatty odor
- Solubility : Soluble in water, ethanol, methanol; Slightly soluble in oils; Insoluble in xylene, propylene glycol
- Density : ~1.1 g/mL (25°C)
- Flash Point : >150 °C (closed cup)
- Cloud Point (1% aq.) : >100 °C
- Stability : Stable under normal conditions; Incompatible with strong oxidizing agents
- Storage : Cool, dry place; Sealed container; Avoid moisture & heat
- Shelf Life : 24 months (unopened)
4. Applications
- Cosmetics & Personal Care : O/W emulsifier, thickener, emollient in creams, lotions, ointments
- Pharmaceuticals : Excipient, emulsifier, solubilizer in topical formulations
- Food : Emulsifier, antifoaming agent
- Industrial : Lubricant, dispersant, plasticizer
5. Safety & Handling
- Hazards : Non-hazardous for transport; May cause mild eye/skin irritation
- PPE : Gloves, safety glasses
- Handling : Avoid dust inhalation; Wash after handling
- Spill : Sweep up; Collect for disposal
6. Packaging
- Standard : 25 kg fiber drum / 50 kg bag
- Custom : 1 kg, 5 kg, 10 kg available
