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An allotropic form of the element carbon consisting of layers of hexagonally arranged carbon atoms in a planar condensed ring system (graphene layers). The layers are stacked parallel to each other in a three-dimensional crystalline long-range order. There are two allotropic forms with different stacking arrangements, hexagonal and rhombohedral. The chemical bonds within the layers are covalent with sp2 hybridization and with a C—C distance of 141.7 pm. The weak bonds between the layers are metallic with a strength comparable to van der Waals bonding only. — ChEBI
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Identity & molecular properties
Source-linked values| CAS number | 7782-42-5 | ChEBI ↗ |
| Molecular formula | C | ChEBI ↗ |
| Molar mass | 1056.968 g/mol | ChEBI ↗ |
| Monoisotopic mass | 1056.0 Da | ChEBI ↗ |
| Formal charge | 0 | ChEBI ↗ |
| ChEBI identifier | CHEBI:33418 | ChEBI ↗ |
Names & structural identifiers
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ChEBI ontologyMass ↔ amount of substance
Calculated from sourced massUses 1056.968 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.
Elemental composition
Theoretical mass fractionsCCalculated theoretical mass fractions from the reported formula and PubChem periodic-table atomic masses. These are not assay or purity results.
Research & patent references
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Sources & 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. Several CAS cross-references occur in this ChEBI entry; this page uses 7782-42-5. Check the original record for identity context.