1-Monostearin (CAS 123-94-4), also known as α-glyceryl monostearate, is a high purity single-component glycerol fatty-acid ester, distinguished from commercial mixed‑glyceride GMS (CAS 31566-31-1). It is lipophilic non-ionic surfactant with defined chemical structure, delivering stable emulsification, thickening and emollient effects for premium cosmetic, pharmaceutical excipient and high‑end food applications. TNJ Chemical is a professional manufacturer and exporter since 2001. We guarantee high-quality products, competitive prices and thoughtful service. If you want to buy or have any other inquiries, please contact sales@tnjchem.com
Key distinction reminder:
✅ CAS 123‑94‑4: Pure single‑component α‑monostearin ≥98 %
✅ CAS 31566‑31‑1: Commercial mixed mono‑/di‑/triglycerides (GMS‑40‑55 / GMS‑90)
General Product Data
Chemical Name 1-Monostearin / α-Glyceryl Monostearate
CAS Number 123-94-4
EINECS‑EC 204-664-4
INCI Designation Glyceryl Stearate
Synonyms Glycerol-1-monostearate; Octadecanoic acid 2,3-dihydroxypropyl ester; α-MonostearinMolecular Formula C21H42O4
Molecular Weight 358.56 g/mol
Chemical Family Glycerol fatty acid mono-ester (single component)
Source Vegetable palm-based; animal-derived upon request
Regulatory Status Complies with USP-NF, EP; Non-CMR, Non-PFAS, Non-nano; REACH registered
Physical & Chemical Characteristics
Physical form White to off-white waxy flakes / pastilles
Odour Mild faint fatty odour, practically tasteless
Melting range 63-65 °CSolubility in water Insoluble in cold water; dispersible under hot vigorous agitation
Solubility in oils Soluble in hot vegetable oils, mineral oil, hot ethanol and chloroform
HLB 3.8 (W/O emulsifier)
Processing hint Add to oil phase, melt at 65-75 °C; avoid prolonged exposure to strong acid or alkali
Quality Requirements (High Purity Pharma‑Cosmetic Grade)
| Test Parameter | Specification | Test Method |
|---|---|---|
| α‑Monostearin Assay | ≥98.0 % | Size‑exclusion HPLC‑RI (THF) |
| Diglycerides | ≤1.5 % | HPLC‑RI |
| Triglycerides | ≤0.5 % | HPLC‑RI |
| Acid Value, mg KOH/g | ≤2.0 | Titration |
| Iodine Value, g I₂/100g | ≤2.0 | Titration |
| Saponification Value, mg KOH/g | 165‑175 | Titration |
| Free Glycerol | ≤0.5 % | GC |
| Loss on Drying | ≤1.0 % | Gravimetric |
| Residue on Ignition | ≤0.1 % | Gravimetric |
| Heavy Metals (Pb+Cd+Hg+As) | Max 10 ppm | AAS |
Main Functions & Recommended Applications
Premium Cosmetics: High‑end creams, ointments, lip care products. Acts as emulsifier, consistency agent and skin emollient.
Suggested dosage: 1‑4 %. Provides more stable emulsion performance versus mixed‑glyceride GMS 31566‑31‑1.
Pharmaceutical: Ointment base, topical cream excipient, suppository raw material. Suitable for compendia‑compliant pharmaceutical formulation.
High‑grade food: Special dietary food additive (E471), used for high‑standard bakery and dairy systems.
Special polymer processing: High‑purity lubricant & anti‑static additive for fine polymer formulations.Important note: This material is single‑component α‑monostearin, not equivalent to mixed‑glyceride commercial GMS (CAS 31566‑31‑1). End‑user shall validate suitability for own formulation and final application. Refer to SDS for full safety guidance.
Logistics & Storage Information
Packaging options: 25 kg fibre‑drum with inner PE liner; 1 kg /5 kg test samples in aluminium foil bags.
Lead‑time: Samples: 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.
chemical.tnj
+8618949823763
tnjchem
2881500864