C7H6O3
138.12 g/mol
Food AdditiveDanger
4-HYDROXYBENZOIC ACID
CAS99-96-7EC202-804-9
Category
Food Additive
Compound Class
Organic Acid
Primary Use
intermediate for food preservatives
4-Hydroxybenzoic acid is a monohydroxybenzoic acid derived from benzoic acid, featuring a hydroxy group at the para position of the benzene ring. It serves as a plant and algal metabolite and is primarily used as an intermediate in the production of food preservatives.
intermediate for food preservativesintermediate for synthetic drugsintermediate for fungicides
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
SimilarStructure SimilarSimilarity 0.84
4'-Hydroxy-4-biphenylcarboxylic acid
CAS58574-03-1
research compound
ReferenceSame Category
Sodium isobutyrate
CAS996-30-5
food preservative and flavoring agent
ReferenceSame Category
Glyceryl dibehenate
CAS99880-64-5
fat ingredient in cosmetics and foods
ReferenceSame Category
Methylparaben
CAS99-76-3
preservative in foods and cosmetics
ReferenceSame Category
Methyl gallate
CAS99-24-1
antioxidant
Referencestereoisomer of
4-Hydroxy(²H₄)benzoic acid
CAS152404-47-2
research compound
Referencestereoisomer of
Potassium paraben
CAS16782-08-4
preservative in cosmetics and food
Safety Reference
Danger
H315Causes skin irritation
H318Causes serious eye damage
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for 4-HYDROXYBENZOIC ACID (CAS 99-96-7) is 2918.29.
HS code (international, 6-digit)
2918.29
EU CN code (8-digit)
2918 29 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
4-hydroxybenzoic acid
InChIKey
FJKROLUGYXJWQN-UHFFFAOYSA-N
SMILES
C1=CC(=CC=C1C(=O)O)O
Synonyms (51)
- 4-HBA
- PHB
- Sodium Ethyl Parahydroxybenzoate EP Impurity A; Aspirin Impurity A; Acetylsalicylic Acid EP Impurity A; Propyl Parahydroxybenzoate EP Impurity A
- 3pcc
- 3pch
- 4-Carboxyphenol
- 4-HYDROXYBENZOIC ACID
- 4-Hydroxybenzoate
- 4-Hydroxybenzoate, III
- 4-Hydroxybenzoesaeure
- 4-OH benzoic acid
- 4-hydoxybenzoic acid
- 4-hydroxy-benzoicaci
- 4-hydroxylbenzoic acid
- 4-hyroxybenzoic acid
- 4beta-hydroxybenzoic acid
- Acido p-idrossibenzoico
- Aspirin Impurity A
- Benzoic acid, 4-hydroxy-
- Benzoic acid, p-hydroxy-
- HYDROXYBENZOIC ACID, PARA
- Hydroxybenzenecarboxylic acid
- Hydroxybenzoic acid
- Kyselina 4-hydroxybenzoova
- Paraben-acid
- SALICYLIC ACID IMPURITY A
- p-Hydroxybenzoic
- p-Hydroxybenzoic acid
- p-Oxybenzoesaure
- p-Oxybenzoesaure [German]
- p-Salicylate
- p-Salicylic acid
- p-carboxyphenol
- p-hydroxy-Benzoate
- p-hydroxy-bezoic acid
- para-Hydroxybenzoic acid
- phenol derivative, 8
- rho-hydroxybenzoic acid
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