Protocatechuic Acid
Preliminary reference disclaimer
This preliminary safety reference is generated from structured MolGraph catalog fields and public reference-style data. It is not a supplier-issued Safety Data Sheet and should not be used as a substitute for supplier-issued documentation, workplace safety review, transport classification, or regulatory compliance decisions. For supplier SDS or COA, submit a documentation request through MolGraph.
Preliminary safety reference
Available
Supplier-issued SDS
Available by request
COA
Available by RFQ / lot confirmation
Transport classification
Requires shipment review
CAS Number
99-50-3
Chemical name
Protocatechuic Acid
Molecular formula
C7H6O4
Molecular weight
154.12 g/mol
Synonyms
4-Carboxy-1,2-dihydroxybenzene; Protocatehuic acid; 4,5-Dihydroxybenzoic acid; FEMA NO. 4430; protocatechuate; Benzoic acid, 3,4-dihydroxy-; 3,4-Dihydroxy Benzoic Acid; protocatechuicacid; Carbohydroquinonic acid; CCRIS 6291; 3,4-dihydroxy-benzoic acid; Catechol-4-carboxylic Acid
InChIKey
YQUVCSBJEUQKSH-UHFFFAOYSA-N
PubChem CID
72
Signal word
Warning
Catalog reference cue; confirm supplier documentation before use.
Hazard statements
H315, H319, H335
Catalog reference cue; confirm supplier documentation before use.
Melting Point
221.0 °C
Catalog reference value; verify against supplier SDS before use.
pKa
4.26
Catalog reference value; verify against supplier SDS before use.
Vapor Pressure
Estimated very low; unit not specified
Catalog reference value; verify against supplier SDS before use.
XLogP
1.1
Catalog reference value; verify against supplier SDS before use.
Shipment review
Shipment details require review before fulfillment.
Transport classification must be confirmed using supplier SDS and shipment documentation before dispatch.