MSDS Magnesium Sulfate (MgSO4) – Safety Data Sheet & GHS Hazards

Summary MSDS for Magnesium Sulfate (MgSO4), CAS 7487-88-9: substance identity, GHS hazard classification, hazard and precautionary statements, and links to the manufacturer's official SDS.

Identity summary

Name	Magnesium Sulfate
Other names (IUPAC)	Sulfuric acid magnesium salt (1:1)
Molecular formula	MgSO4
CAS number	7487-88-9
Molar mass	120.37 g/mol
PubChem CID	24083

Molar mass of MgSO4 and how to calculate it

The molar mass of MgSO4 is 120.37 g/mol, the sum of the relative atomic masses of all atoms in the formula: 24.305 + 32.065 + 4 × 15.999 = 120.37 g/mol.

Element	Atoms	Atomic mass	Contribution	Mass %
Mg	1	24.305	24.30	20.19%
S	1	32.065	32.06	26.64%
O	4	15.999	64.00	53.17%

So 1 mol of MgSO4 weighs 120.37 g, and 1 L of a 0.1 M solution needs 12.037 g of pure MgSO4. For liquid or concentrated reagents, work from assay and density with the dilution formula. Calculate other compounds with the molar mass calculator.

Hazard identification (GHS)

This substance does not meet the GHS hazard criteria according to TCI official data. Still follow good laboratory practice: wear a lab coat and safety glasses and keep it in a closed, labelled container.

The GHS classification above matches TCI (Tokyo Chemical Industry) official data for product M1890 Magnesium Sulfate Anhydrous. Substance identity from PubChem CID 24083.

Download the official SDS & CoA

The applicable Safety Data Sheet is the manufacturer's SDS for the product and lot you purchase. For products available from AMI Scientific:

TCI M1890 – Magnesium Sulfate Anhydrous	Official SDS & CoA (TCI)
TCI M1890 – Magnesium Sulfate Anhydrous	View product

SDS and lot-specific CoA are sent with the quotation/order or on request.

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What is an MSDS/SDS?

An MSDS (Material Safety Data Sheet), now called an SDS (Safety Data Sheet), is a 16-section document describing the hazards, handling, storage, first aid, and disposal of a chemical. Read the full MSDS guide and other MSDS pages.

This summary was compiled by AMI Scientific from TCI official GHS data for information purposes. Classification may differ by concentration, form, and supplier. Always refer to the manufacturer's official SDS for the product and lot you use. Updated: 06-11-2026.