Primary curated chemical record: www.ebi.ac.uk/chebi/CHEBI:33404 . CHEBI:33404, 3-hydroxypropionic acid; CAS 503-66-2. Definition, structure and formula identify a terminal hydroxy group on propionic acid, with formula C3H6O3 and SMILES O=C(O)CCO. The ontology classifies the compound as a 3-hydroxy monocarboxylic acid, CHEBI:35969; the Names section gives 3-hydroxypropanoic acid. Last Modified is 24 January 2023; no publication date or individual authorship is inferred.
The same CHEBI:33404 record, www.ebi.ac.uk/chebi/CHEBI:33404 , gives Average Mass 90.078 and lists the conjugate-base relation to 3-hydroxypropionate, CHEBI:16510, in the Ontology section. These support the species distinction and the mass-to-molar concentration conversion in 3-hydroxypropionic acid.
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