How is Glycerol Monostearate made? Home News Industry News
How is Glycerol Monostearate made?
GMS can be synthesized in two ways as mentioned in the manufacturing processes of mono- and diglycerides:

Transesterification process: glycerolysis reaction between fats/oils (hydrogenated oil included) and glycerol (3)
Direct esterification process: esterification between glycerol and the fatty acid – stearic acid
The above raw materials are from the edible sources: animal fats/oils or vegetable oils, especially from the latter, such as palm, rapeseed, soya bean and sunflower oil.

Other Names   
Glyceryl monostearate
Mono and diglycerides of fatty acids
CAS Number    123-94-4
Chemical formula    C21H42O4
Molecular Weight    358.56
White powder, flake or bead with a slight acidic smell.

Solubility and HLB
GMS has a low HLB value 3-4, it is insoluble in water; soluble in hot oils, hot organic solvents.

As its low HLB property, it is lipophilic and forms water-in-oil emulsions (w/o).

There are two chemical structures of GMS due to the two places of OH-, and the first isomer takes large part in the final GMS product.

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