Arsenopyrite
A sulfide mineral with formula AsFeS. It is the most abundant and widespread arsenic mineral. — ChEBI
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Identity & molecular properties
Source-linked values| CAS number | 1303-18-0 | ChEBI ↗ |
| Molecular formula | As.Fe.S | ChEBI ↗ |
| Molar mass | 162.834 g/mol | ChEBI ↗ |
| Monoisotopic mass | 162.82861 Da | ChEBI ↗ |
| Formal charge | 0 | ChEBI ↗ |
| ChEBI identifier | CHEBI:75861 | ChEBI ↗ |
Names & structural identifiers
Copy any identifierarsenopyriteMJLGNAGLHAQFHV-UHFFFAOYSA-N[As-].[Fe+3].[S-2]InChI=1S/As.Fe.S/q-1;+3;-2Classification & relationships
ChEBI ontologyMass ↔ amount of substance
Calculated from sourced massUses 162.834 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.
Elemental composition
Theoretical mass fractionsAsFeSCalculated 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.