Copper(II) sulfate pentahydrate
The pentahydrate of copper(2+) sulfate. A bright blue crystalline solid. — ChEBI
Safety documents & references
1 indexed referencesFind a product-specific SDS
Safety guides and government classification records are not a manufacturer’s SDS. Match supplier, product number, concentration, physical form, region and revision before using a document.
Identity & molecular properties
Source-linked values| CAS number | 7758-99-8 | ChEBI ↗ |
| Molecular formula | Cu.5H2O.O4S | ChEBI ↗ |
| Molar mass | 249.684 g/mol | ChEBI ↗ |
| Monoisotopic mass | 248.93415 Da | ChEBI ↗ |
| Formal charge | 0 | ChEBI ↗ |
| ChEBI identifier | CHEBI:31440 | ChEBI ↗ |
Cross-source molecular data
PubChem| Molar mass | 249.69 g/mol | PubChem ↗ |
| Exact mass | 248.934150 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 identifiercopper(II) sulfate pentahydratecopper(2+) sulfate pentahydrateJZCCFEFSEZPSOG-UHFFFAOYSA-LO=S(=O)([O-])[O-].[Cu+2].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H]InChI=1S/Cu.H2O4S.5H2O/c;1-5(2,3)4;;;;;/h;(H2,1,2,3,4);5*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 ontologySafety classification · Japan
NITE / Japanese governmentCopper(II) sulfate pentahydrate · R06-C-107-JNIOSH
| Endpoint | Reported classification |
|---|---|
| Serious eye damage/eye irritation | Category 1 |
Selected source-reported endpoints. Other endpoints, rationales and conditions remain in the original classification. Missing or unlisted information does not mean non-hazardous. This is not a global classification or transport decision.
Read the original NITE classificationMass ↔ amount of substance
Calculated from sourced massUses 249.684 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.
Elemental composition
Theoretical mass fractionsCuOSHCalculated 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 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.