Magnesium Stearate

Name: Magnesium Stearate
Brand: Vaqora Chemicals
SKU: VQ-008529

About Magnesium Stearate

Magnesium Stearate is a carboxylic acid carrying the CAS registry number 557-04-0. The compound has the formula C36H70MgO4, corresponding to a molecular weight of 591.2 g/mol. Systematically, it is named magnesium bis(octadecanoate). Common synonyms include Octadecanoic Acid Magnesium Salt and Stearic Acid Magnesium Salt.

Keep the container tightly sealed and store it in a cool, dry area. It carries the GHS signal word “Warning” with 4 hazard statements. Review the Safety Data Sheet before use.

Typical applications include organic synthesis and API synthesis. Our customers for this product work in pharmaceutical manufacturing and academic and industrial research.

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide. This item is currently in stock for prompt dispatch.

Typical applications

Organic synthesis
API synthesis

Industries

Specifications & identifiers

Chemical identifiers
Product name	Magnesium Stearate
Catalogue No.	VQ-008529
CAS Number	557-04-0
IUPAC name	magnesium bis(octadecanoate)
Molecular formula	C₃₆H₇₀MgO₄
Molecular weight	591.2 g/mol
Exact mass	590.5125
Grade	Reference Standard
InChIKey	HQKMJHAJHXVSDF-UHFFFAOYSA-L
SMILES	CCCCCCCCCCCCCCCCCC(=O)[O-].CCCCCCCCCCCCCCCCCC(=O)[O-].[Mg+2]
PubChem CID	11177

Physical properties
Physical form	Other
H-bond donors / acceptors	0 / 4
TPSA	80.3 Å²
Synonyms	Octadecanoic Acid Magnesium Salt, Stearic Acid Magnesium Salt, AFCO-Chem MGS, Aurabrite MA 76, Daiwax M, Daiwax SMO, Dibasic magnesium stearate, EM 100, EM 100 (salt), EM 112, EM 144, EM 612

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
H413May cause long lasting harmful effects to aquatic life

Precautionary statements: P261, P264, P264 + P265, P271, P273, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Other grades of CAS 557-04-0

Magnesium stearate, precipitated

CAS: 557-04-0
Formula: C₃₆H₇₀MgO₄
MW: 591.2 g/mol

VQ-014454

BP/USP/EP

Magnesium stearate, precipitated, BP/USP/EP

CAS: 557-04-0
Formula: C₃₆H₇₀MgO₄
MW: 591.2 g/mol

VQ-046482

Frequently asked questions

What is the CAS number of Magnesium Stearate?

The CAS Registry Number of Magnesium Stearate is 557-04-0. It is also known as Octadecanoic Acid Magnesium Salt, Stearic Acid Magnesium Salt, AFCO-Chem MGS.

What is the molecular formula and molecular weight of Magnesium Stearate?

Magnesium Stearate has the molecular formula C36H70MgO4 and a molecular weight of 591.2 g/mol. Its IUPAC name is magnesium bis(octadecanoate).

Which grade and pack sizes of Magnesium Stearate can I order?

We supply Magnesium Stearate in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg, 250 mg, 500 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Magnesium Stearate?

Yes. Every lot of Magnesium Stearate is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Magnesium Stearate be shipped internationally?

Yes. Magnesium Stearate is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.