Is Glycerol Monostearate the same as Glyceryl Monostearate?

These names are commonly used for the same CAS identity, 31566-31-1. They do not make every commercial grade equivalent: monoglyceride content, fatty-acid profile, physical form and application-specific controls can differ. Confirm the offered specification rather than relying only on the name or CAS number.

Can GMS flakes and powder be substituted directly in a processing line?

Not automatically. They may represent the same chemical identity, but feed behaviour, dust generation, melting and dispersion can vary. Check the physical form, particle-size expectation and addition method against the actual equipment and formulation before changing from one form to another.

What should an industrial GMS specification include?

Specify the intended physical form, monoglyceride content, appearance or colour, acid value, iodine value, melting range, pack size and release test methods. When GMS is used in polymers, identify the resin and conversion process so suitability is assessed against the real production conditions.

Glycerol Monostearate (GMS) CAS 31566-31-1

Glycerol Monostearate (glyceryl monostearate, GMS), CAS 31566-31-1, is a nonionic monoglyceride used in polymer-processing and industrial-emulsion systems. Grade selection can cover physical form, monoglyceride content, colour, acid value and melting range. Shipment documents include COA, TDS and SDS.

CAS: 31566-31-1
Synonyms: Glyceryl Monostearate; Glycerol Mono Stearate; GMS; Monostearin
Einecs: Not specified
Molecular Formula: C21H42O4
Grade: Industrial glycerol monostearate for polymer-processing and industrial-emulsion applications; grade agreed for the intended formulation
Package: Typically 25 kg multi-wall kraft bags with PE liner; final pack, label and pallet configuration confirmed before release

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Product Description

Glycerol Monostearate (GMS) CAS 31566-31-1 is glyceryl monostearate (monostearin), with molecular formula C21H42O4.

Synonyms: Glyceryl monostearate; glycerol mono stearate; GMS; monostearin.

CAS: 31566-31-1.

Molecular formula: C21H42O4.

It is supplied as powder or flakes.

It is used as an emulsifying, processing-lubricant or antistatic component in industrial formulations.

It is evaluated in PVC compounds, extrusion and moulding for internal lubrication and release behaviour.

It is also used in polyolefin and thermoplastic compounding, wax and industrial-emulsion systems.

Performance depends on monoglyceride content, fatty-acid profile, resin, dosage and processing temperature.

Grades are selected by form, monoglyceride content, colour, acid value and melting range.

GMS flakes and powder are not automatically interchangeable on a processing line.

State physical form, monoglyceride content, appearance, acid value, iodine value, melting range and the intended formulation.

For purchasing, specify powder or flake form, then compare monoglyceride content, colour, acid value, iodine value, melting range and particle handling.

Keep containers closed and follow the current SDS for storage and handling.

Use suitable PPE and exposure controls when handling the material.

Confirm physical form, monoglyceride content, colour, acid value and melting range on the COA.

Confirm grade, packaging, and specification as required.

The page is an RFQ entry point and does not state stock, price, MOQ, or fixed lead time.

For an RFQ, state the intended application, required grade, quantity, packaging, destination, and document needs.

FAQ - Technical & Supply Chain

Q:
Is Glycerol Monostearate the same as Glyceryl Monostearate?

A: These names are commonly used for the same CAS identity, 31566-31-1. They do not make every commercial grade equivalent: monoglyceride content, fatty-acid profile, physical form and application-specific controls can differ. Confirm the offered specification rather than relying only on the name or CAS number.
Q:
Can GMS flakes and powder be substituted directly in a processing line?

A: Not automatically. They may represent the same chemical identity, but feed behaviour, dust generation, melting and dispersion can vary. Check the physical form, particle-size expectation and addition method against the actual equipment and formulation before changing from one form to another.
Q:
What should an industrial GMS specification include?

A: Specify the intended physical form, monoglyceride content, appearance or colour, acid value, iodine value, melting range, pack size and release test methods. When GMS is used in polymers, identify the resin and conversion process so suitability is assessed against the real production conditions.

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