Glycerol Monostearate (AS)

Overview

Glycerol Monostearate (AS), commonly known as GMS (AS) or Glyceryl Stearate (and) Stearamide AMP (a common INCI for a self-emulsifying form), is a highly versatile and widely utilized non-ionic emulsifier derived from natural sources, specifically the esterification of glycerol and stearic acid. As a monoester, GMS (AS) plays a crucial role in various industrial applications, particularly where stable emulsions, efficient dispersion, and enhanced product texture are paramount. CanCastor, leveraging decades of expertise in oleochemicals, supplies premium GMS (AS) that meets stringent quality benchmarks, ensuring consistent performance for our global clientele.

Our GMS (AS) is characterized by its excellent emulsifying, stabilizing, and opacifying properties. With a typical HLB (Hydrophilic-Lipophilic Balance) value around 3.8-4.2 for the pure monoester, it primarily functions as a water-in-oil (W/O) emulsifier or a co-emulsifier for oil-in-water (O/W) systems, often in conjunction with other surfactants to achieve desired emulsion stability. For the 'AS' variant (often implying 'auto-emulsifying' or 'acid stable'), it may incorporate a small percentage of an anionic co-surfactant to enhance its emulsifying power and broaden its applicability across varying pH ranges. This adaptability makes it an indispensable ingredient in pharmaceuticals, food processing, cosmetics, and specialty industrial formulations globally.

CanCastor's commitment to E-E-A-T is reflected in our rigorous adherence to global quality standards. Our GMS (AS) is manufactured under ISO 9001:2015 certified processes, ensuring full traceability and batch-to-batch consistency. We proudly offer grades compliant with major pharmacopoeias like USP (United States Pharmacopeia) and BP (British Pharmacopoeia), as well as food-grade specifications adhering to Codex Alimentarius and FDA 21 CFR regulations. For a comprehensive list of our offerings, please explore our full catalog.

Key Physical & Chemical Properties

• INCI Name: Glyceryl Stearate (for pure GMS); often Glyceryl Stearate (and) Stearamide AMP for AS grade
• CAS Number: 123-94-4 (for Glyceryl Monostearate)
• Appearance: White to off-white flakes or powder
• Monoester Content: Min. 40% - 60% (depending on specific AS grade; often blend with di- and triesters)
• Acid Value: Max. 3.0 mg KOH/g
• Iodine Value: Max. 3.0 g I2/100g
• Saponification Value: 160-170 mg KOH/g
• Melting Point: Approx. 55-60°C
• Heavy Metals: Max. 10 ppm
• HLB Value: ~3.8 - 4.2 (for GMS SE, Self-Emulsifying, higher effective HLB due to co-emulsifiers)