Magnesium hydroxide

Name: Magnesium hydroxide
Brand: Vaqora Chemicals
SKU: VQ-014438

About Magnesium hydroxide

Magnesium hydroxide is an alkaline earth compound in Extra Pure grade carrying the CAS registry number 1309-42-8 with a typical assay of 95.0–100.5%. The compound has the formula H2MgO2, corresponding to a molecular weight of 58.32 g/mol. Systematically, it is named magnesium dihydroxide. Alternative names: Milk of magnesia and Magnesium hydrate.

The material typically appears as a powder, white, passes test. Store sealed in a dry, well-ventilated location away from incompatible materials. Handle it with standard laboratory precautions and appropriate personal protective equipment.

Key uses span materials research and chemical synthesis. Buyers come mainly from academic and industrial research.

Standard pack sizes are 500 g, 1 kg, 5 x 1 kg and 4 x 25 kg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

Materials research
Chemical synthesis

Industries

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	Magnesium hydroxide
Catalogue No.	VQ-014438
CAS Number	1309-42-8
IUPAC name	magnesium dihydroxide
Molecular formula	H₂MgO₂
Molecular weight	58.32 g/mol
Exact mass	57.9905
Grade	Extra Pure
Purity / assay	95.0–100.5%
HSN code	28161010
InChIKey	VTHJTEIRLNZDEV-UHFFFAOYSA-L
SMILES	[OH-].[OH-].[Mg+2]
PubChem CID	73981

Physical properties
Physical form	Powder
Appearance	Powder, white, passes test
H-bond donors / acceptors	2 / 2
TPSA	2 Å²
Synonyms	Milk of magnesia, Magnesium hydrate, Magnesium hydroxide (Mg(OH)2), Magnesium(II) hydroxide, Phillips magnesia tablets, Magnesium (as hydroxide), Magnesii hydroxidum, INS NO.528, Phillips milk of magnesia liquid, INS-528, Hydrate, Magnesium, Hydroxide, Magnesium

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 1309-42-8

Magnesium hydroxide, 95%

CAS: 1309-42-8
Formula: H₂MgO₂
MW: 58.32 g/mol

VQ-014439

Magnesium hydroxide, nanopowder, APS 10 nm, 99%

CAS: 1309-42-8
Formula: H₂MgO₂
MW: 58.32 g/mol

VQ-017490

Frequently asked questions

What is the CAS number of Magnesium hydroxide?

The CAS Registry Number of Magnesium hydroxide is 1309-42-8. It is also known as Milk of magnesia, Magnesium hydrate, Magnesium hydroxide (Mg(OH)2).

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

Magnesium hydroxide has the molecular formula H2MgO2 and a molecular weight of 58.32 g/mol. Its IUPAC name is magnesium dihydroxide.

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

We supply Magnesium hydroxide in Extra Pure (95.0–100.5%) grade, in 500 g, 1 kg, 5 x 1 kg, 4 x 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Magnesium hydroxide?

Yes. Every lot of Magnesium hydroxide 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 hydroxide be shipped internationally?

Yes. We export Magnesium hydroxide worldwide by air and sea freight or express courier, on EXW, FOB, CIF, CFR or DAP Incoterms, with full export documentation.