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Chemical substance record

Magnesium sulfate

7487-88-9Mg.O4S120.368 g/mol
MineralChEBI source record

A magnesium salt having sulfate as the counterion. — ChEBI

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Identity & molecular properties

Source-linked values
CAS number7487-88-9ChEBI ↗
Molecular formulaMg.O4SChEBI ↗
Molar mass120.368 g/molChEBI ↗
Monoisotopic mass119.93677 DaChEBI ↗
Formal charge0ChEBI ↗
ChEBI identifierCHEBI:32599ChEBI ↗

Cross-source molecular data

PubChem
Molar mass120.37 g/molPubChem ↗
Exact mass119.9367713 DaPubChem ↗

PubChem computed values are shown separately from the ChEBI record. An exact InChIKey match was used to connect the records. Molecular descriptors do not describe a supplied product’s purity, particle size or performance.

Names & structural identifiers

Copy any identifier
magnesium sulfate
magnesium sulfate
CSNNHWWHGAXBCP-UHFFFAOYSA-L
O=S(=O)([O-])[O-].[Mg+2]
InChI=1S/Mg.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2

Classification & relationships

ChEBI ontology

Roles recorded in ChEBI

fertilizeranalgesiccardiovascular drugantineoplastic agentanticonvulsantanti-arrhythmia drugcalcium channel blockeranaestheticantidoteneuroprotective agent

Database role annotations describe reported biological or chemical roles; they are not product approvals or recommendations for use.

Mass ↔ amount of substance

Calculated from sourced mass
Equivalent amount
0.00830786 mol

Uses 120.368 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.

Elemental composition

Theoretical mass fractions
O
Oxygen · 4 atoms
53.17%
S
Sulfur · 1 atom
26.64%
Mg
Magnesium · 1 atom
20.19%

Calculated theoretical mass fractions from the reported formula and PubChem periodic-table atomic masses. These are not assay or purity results.

Research & patent references

Selected source associations

Sources & record history

Checked 27 Sep 2026
EMBL-EBI ChEBI · CHEBI:32599

Release 255, 9 September 2026. ChEBI three-star (manually annotated) source entry. View original record ↗ · CC BY 4.0

NCBI PubChem · CID 24083 · retrieved 2026-09-27

PubCAS formats source data, connects references and computes explicitly labelled conversions. CAS cross-references are supplied by ChEBI; they do not constitute CAS verification or endorsement.