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more general categories information about this item 08. Chemical Category 08. Chemical Category elemental molecular entity [CHEBI:33259] (221) elemental carbon [CHEBI:33415] (9) diatomic carbon [CHEBI:33420] (4) dicarbide(2-) [CHEBI:30081] (1) main group molecular entity [CHEBI:33579] (25650) p-block molecular entity [CHEBI:33675] (25343) carbon group molecular entity [CHEBI:33582] (23847) organic molecular entity [CHEBI:50860] (23769) elemental carbon [CHEBI:33415] (9) diatomic carbon [CHEBI:33420] (4) dicarbide(2-) [CHEBI:30081] (1) ChEBI Compound Accession Identifier: [CHEBI:30081] ChEBI Compound Description: The dianion formed by loss of the two protons from acetylene (ethyne). ChEBI Compound Identification Number: 30081 ChEBI InChI Value: InChI=1S/C2/c1-2/q-2 ChEBI InChIKey Value: VWWMOACCGFHMEV-UHFFFAOYSA-N ChEBI Compound Name: dicarbide(2-) ChEBI SMILES Value: [C-]#[C-] ChEBI Substance ID: 0 ChEBI URL: ChEBI:30081 ChemSpider ID: NS Ontomatica Chemical Accession Key (OnChAKey): VWWMOACCGFHMEV_UHFFFAOYSA_N_000_000000 PubChem Compound ID: NS