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Carboxylic acids and anhydrides

p-Hydroxybenzoate

Also known as Benzoic acid, 4-hydroxy-, ion(1-), p-Hydroxybenzoate anion, 4-Hydroxybenzoate ion

CAS 456-23-5Formula C7H5O3-Molar mass 137.11 g/molEC 202-804-9
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p-Hydroxybenzoate chemical structure, C7H5O3-, CAS 456-23-5
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
456-23-5
Formula
C7H5O3-
Molar mass
137.11 g/mol
EC number
202-804-9
HS code
291829
Category
Carboxylic acids and anhydrides

What is p-Hydroxybenzoate?

Plain description, key identifiers and synonyms

4-hydroxybenzoate is the conjugate base of 4-hydroxybenzoic acid, comprising a 4-hydroxybenzoic acid core with a proton missing to give a charge of -1. It has a role as a Saccharomyces cerevisiae metabolite and a plant metabolite. It is functionally related to a benzoate. It is a conjugate base of a 4-hydroxybenzoic acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
4-carboxyphenolate
CAS number
456-23-5 CAS number cross-checked
EC number
202-804-9
Molecular formula
C7H5O3-
UNII
8MJB9HSC8Q
InChIKey
FJKROLUGYXJWQN-UHFFFAOYSA-M
InChI
InChI=1S/C7H6O3/c8-6-3-1-5(2-4-6)7(9)10/h1-4,8H,(H,9,10)/p-1
SMILES (canonical and isomeric)
C1=CC(=CC=C1C(=O)O)[O-]

Synonyms

  • Benzoic acid, 4-hydroxy-, ion(1-)
  • p-Hydroxybenzoate anion
  • 4-Hydroxybenzoate ion
  • 4-carboxyphenolate
  • Benzoic acid, p-hydroxy-, ion(1-)
  • p-Hydroxybenzoic acid monoanion
  • p-Hydroxybenzoic acid ion(1-)
  • 3pcc
  • 3pch
  • 4-hydroxy-benzoate
  • Benzoic acid, p-hydroxy
  • parahydroxybenzoate
  • para-hydroxybenzoate
  • 4e3g
  • PHB
  • W398608_aldrich
  • 240141_Aldrich
  • 54630_FLUKA
  • 4-hydroxybenzoic acid, ion(1-)
  • p-Hydroxybenzenecarboxylic acid

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
137.11 g/molcalc.
Exact mass
137.0244 Dacalc.
LogP (octanol/water)
0.46calc.
Topological polar surface area
60.36 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
1calc.
Heavy atoms
10calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0calc.
Formal charge
-1calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1ccccc1

c1ccccc1

1 ring, 6 atoms, the Benzene ring system.

485,677 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

p-Hydroxybenzoate suppliers

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Where suppliers are based

1 supplier in 1 country

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p-Hydroxybenzoate price

Indicative price range per kg from live supplier offers

No published prices right now

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Uses and applications

What the substance is used for, by industry and function

Roles

  • Saccharomyces cerevisiae metabolite
  • eukaryotic metabolite
  • fungal metabolite
  • metabolite
  • plant metabolite

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code p-Hydroxybenzoate is traded under.

HS 2918.29Indicative HS code

Carboxylic acids, (with phenol function but without other oxygen function), their anhydrides, halides…

World exports in 2024
$861M
+0.9% vs 2023, imports $892M
2019 to 2024
Top exporters
  1. China30.5%
  2. South Korea18.3%
  3. Switzerland * partner reported13.3%
Top importers
  1. United States14.7%
  2. Germany13.3%
  3. Japan10.3%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for p-Hydroxybenzoate is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about p-Hydroxybenzoate, based on the data on this page

What is p-Hydroxybenzoate?

4-hydroxybenzoate is the conjugate base of 4-hydroxybenzoic acid, comprising a 4-hydroxybenzoic acid core with a proton missing to give a charge of -1. It has a role as a Saccharomyces cerevisiae metabolite and a plant metabolite. It is functionally related to a benzoate.

What is the CAS number of p-Hydroxybenzoate?

The CAS registry number of p-Hydroxybenzoate is 456-23-5.

What is the molecular formula and weight of p-Hydroxybenzoate?

The molecular formula of p-Hydroxybenzoate is C7H5O3- and its molar mass is 137.11 g/mol.

What is p-Hydroxybenzoate used for?

Known uses and roles of p-Hydroxybenzoate include building blocks in research and laboratory, screening compounds in research and laboratory, saccharomyces cerevisiae metabolite, eukaryotic metabolite, fungal metabolite and 2 more.

Is p-Hydroxybenzoate hazardous?

No GHS hazard classification for p-Hydroxybenzoate is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of p-Hydroxybenzoate?

p-Hydroxybenzoate is usually classified under HS code 291829 (Carboxylic acids with phenol function but without other oxygen function, their…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy p-Hydroxybenzoate?

CompoundList lists 1 supplier of p-Hydroxybenzoate in China. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of p-Hydroxybenzoate?

Suppliers quote p-Hydroxybenzoate on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle p-Hydroxybenzoate

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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