Magnesium dihydroxide
A magnesium hydroxide in which the magnesium atom is bound to two hydroxide groups. — ChEBI
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Identity & molecular properties
Source-linked values| CAS number | 1309-42-8 | ChEBI ↗ |
| Molecular formula | 2HO.Mg | ChEBI ↗ |
| Molar mass | 58.319 g/mol | ChEBI ↗ |
| Monoisotopic mass | 57.99052 Da | ChEBI ↗ |
| Formal charge | 0 | ChEBI ↗ |
| ChEBI identifier | CHEBI:6637 | ChEBI ↗ |
Cross-source molecular data
PubChem| Molar mass | 58.320 g/mol | PubChem ↗ |
| Exact mass | 57.9905210 Da | PubChem ↗ |
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 identifiermagnesium dihydroxidemagnesium dihydroxideVTHJTEIRLNZDEV-UHFFFAOYSA-L[Mg+2].[OH-].[OH-]InChI=1S/Mg.2H2O/h;2*1H2/q+2;;/p-2Names & synonyms
Names are supplied by ChEBI. Trade names and related synonyms may describe a broader product context.
Classification & relationships
ChEBI ontologyRoles recorded in ChEBI
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 massUses 58.319 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.
Research & patent references
Selected source associationsSources & record history
Checked 27 Sep 2026Release 255, 9 September 2026. ChEBI three-star (manually annotated) source entry. View original record ↗ · CC BY 4.0
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.