Glycerol Monostearate (GMS 40% 90%, CAS 31566-31-1) is a mixed glycerol ester produced by esterification reaction of glycerin and stearic acid. This multi-functional non-ionic surfactant exists in two commercial grades: conventional GMS-40-55 and molecular-distilled GMS-90. It delivers emulsifying, thickening, stabilizing and emollient performance for food, personal-care, pharmaceutical excipient and polymer processing sectors. TNJ Chemical is a professional manufacturer and exporter since 2001. We guarantee high quality GMS USP-NF or E471, competitive prices and thoughtful service. If you want to buy or have any other inquiries, please contact sales@tnjchem.com
General Product Data
Chemical Name Glyceryl Monostearate
CAS Number 31566-31-1EINECS‑EC 250-705-4
INCI Designation Glyceryl Stearate
Food Additive Code E471Chemical Family Glycerol fatty acid ester
Source Vegetable palm-based; animal-derived upon request
Regulatory Status Complies with Ph.Eur, USP-NF, FDA GRAS, REACH; Non-CMR, Non-PFAS, Non‑nano
Physical & Chemical Characteristics
Physical form White to off-white waxy flakes / pastilles
Odour Mild fatty odour, practically tastelessMelting range 54-66 °C
Solubility in water Insoluble in cold water; dispersible under hot agitation
Solubility in oils Soluble in hot vegetable oils, mineral oil, hot ethanol
HLB 3.6-4.2 (W/O emulsifier)
Processing hint Add to oil phase, melt at 60-70 °C; avoid prolonged strong acid / alkali exposure
Quality Requirements
| Test Parameter | GMS‑40‑55 (Conventional Grade, Ph.Eur 0495) | GMS‑90 (Distilled Grade, USP‑NF) | Test Method |
|---|---|---|---|
| Monoglycerides (total) | 40.0‑55.0 % | Min 90.0 % | Size‑exclusion HPLC‑RI (THF) |
| Diglycerides | 30.0‑45.0 % | Max 8.0 % | HPLC‑RI |
| Triglycerides | 5.0‑15.0 % | Max 2.0 % | HPLC‑RI |
| Acid Value, mg KOH/g | Max 3.0 | Max 5.0 | Titration |
| Iodine Value, g I₂/100g | Max 3.0 | Max 3.0 | Titration |
| Saponification Value, mg KOH/g | 158‑177 | 150‑165 | Titration |
| Free Glycerol | Max 6.0 % | Max 1.2 % | GC |
| Loss on Drying | Max 1.0 % | Max 1.0 % | Gravimetric |
| Residue on Ignition | Max 0.1 % | Max 0.5 % | Gravimetric |
| Heavy Metals (Pb+Cd+Hg+As) | Max 10 ppm | Max 10 ppm | AAS |
Main Functions & Recommended Applications
Cosmetics: Oil-in-water & water-in-oil creams, lotions, ointments, lip care items. Function: emulsifier, consistency agent, skin-emollient. Suggested dosage: 1-5 %.
Food industry (E471): Bakery anti-staling, ice-cream stabilizer, margarine, dairy fat modification.
Pharmaceutical: Ointment bases, suppository excipient, topical cream emulsifier.
Plastics processing: Anti-static additive, anti-fog agent for polyolefin materials.Important note: End-user shall validate suitability for own formulation and final application. Not for direct oral consumption as raw material. Refer to SDS for full safety guidance.
Logistics & Storage Information
Packaging options: 25 kg paper bag / fibre-drum with inner PE liner; 1 kg /5 kg test samples in aluminium foil bags.
Lead-time: 7-15 working days against deposit. Shipment modes: sea freight, air freight, international courier.
Storage condition: Keep container tightly closed. Store in cool, dry warehouse, shield from sunlight and excessive heat.
Shelf-life: 24 months under original sealed storage.
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