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Impurities and reference standards

3-Hydroxybenzoic acid

Also known as m-Hydroxybenzoic acid, m-Salicylic acid, 3-Carboxyphenol

CAS 99-06-9Formula C7H6O3Molar mass 138.12 g/molEC 202-726-5
GHS signal word: Warning. Pictograms: Harmful or irritant 39 suppliers listed
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3-Hydroxybenzoic acid chemical structure, C7H6O3, CAS 99-06-9
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
99-06-9
Formula
C7H6O3
Molar mass
138.12 g/mol
EC number
202-726-5
HS code
291829
Category
Impurities and reference standards

What is 3-Hydroxybenzoic acid?

Plain description, key identifiers and synonyms

3-hydroxybenzoic acid is a monohydroxybenzoic acid that is benzoic acid substituted by a hydroxy group at position 3. It has been isolated from Taxus baccata. It is used as an intermediate in the synthesis of plasticisers, resins, pharmaceuticals, etc. It has a role as a plant metabolite and a bacterial metabolite. It is functionally related to a benzoic acid. It is a conjugate acid of a 3-hydroxybenzoate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
3-hydroxybenzoic acid
CAS number
99-06-9 CAS number cross-checkedOther or deprecated CAS: 25302-76-5
EC number
202-726-5
Molecular formula
C7H6O3
UNII
2ZFW40OJ7U
MDL number
MFCD00002506
INCI name
3-HYDROXYBENZOIC ACID
InChIKey
IJFXRHURBJZNAO-UHFFFAOYSA-N
InChI
InChI=1S/C7H6O3/c8-6-3-1-2-5(4-6)7(9)10/h1-4,8H,(H,9,10)
SMILES (canonical and isomeric)
C1=CC(=CC(=C1)O)C(=O)O

Synonyms

  • m-Hydroxybenzoic acid
  • m-Salicylic acid
  • 3-Carboxyphenol
  • Benzoic acid, 3-hydroxy-
  • Benzoic acid, m-hydroxy-
  • AC PE 3HB
  • 3-hydroxybenzoic acid, monosodium salt
  • m-Hba
  • 3-Hydroxy benzoic acid
  • Acido m-idrossibenzoico
  • meta-Hydroxybenzoic acid
  • Kyselina 3-hydroxybenzoova
  • 3-hydroxy-benzoic acid
  • m-hydroxybenzoate
  • m-carboxyphenol
  • m-salicylate
  • 3pcb
  • 3-hydroxy benzoate
  • Aspirin Impurity C
  • meta-hydroxybenzoate
  • 3-Hydroxybenzoicacid
  • 3-OH benzoic acid
  • 3-hydroxybenzoic-acid
  • metahydroxybenzoic acid
  • Kyselina3-hydroxybenzoova
Show all 30 synonyms
  • 3-Hydroxybenzoic acid, analytical standard
  • 3-Hydroxybenzoic acid, ReagentPlus(R), 99%
  • doi:10.14272/IJFXRHURBJZNAO-UHFFFAOYSA-N.1
  • 3-Hydroxybenzoic acid, Vetec(TM) reagent grade, 98%
  • m-Hydroxybenzoic acid Solution in Methanol, 100ug/mL

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
138.12 g/molcalc.
Exact mass
138.0317 Dacalc.
LogP (octanol/water)
1.09calc.
Topological polar surface area
57.53 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
1calc.
Heavy atoms
10calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
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

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H302Harmful if swallowed.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (19)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

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

Full safety data and first aid

3-Hydroxybenzoic acid suppliers

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All 39 suppliers
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Where suppliers are based

39 suppliers in 12 countries

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3-Hydroxybenzoic acid price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Cosmetic ingredient, INCI name 3-HYDROXYBENZOIC ACID(skin conditioning)

Roles

  • bacterial metabolite
  • eukaryotic metabolite
  • metabolite
  • plant metabolite
  • prokaryotic metabolite

Functional uses

  • Flavouring and nutrient
  • Softener and conditioner

Cosmetic functions

  • Skin conditioning

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code 3-Hydroxybenzoic acid 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 3-Hydroxybenzoic acid is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about 3-Hydroxybenzoic acid, based on the data on this page

What is 3-Hydroxybenzoic acid?

3-hydroxybenzoic acid is a monohydroxybenzoic acid that is benzoic acid substituted by a hydroxy group at position 3. It has been isolated from Taxus baccata. It is used as an intermediate in the synthesis of plasticisers, resins, pharmaceuticals, etc. It has a role as a plant metabolite and a bacterial metabolite.

What is the CAS number of 3-Hydroxybenzoic acid?

The CAS registry number of 3-Hydroxybenzoic acid is 99-06-9. Other or deprecated CAS numbers: 25302-76-5.

What is the molecular formula and weight of 3-Hydroxybenzoic acid?

The molecular formula of 3-Hydroxybenzoic acid is C7H6O3 and its molar mass is 138.12 g/mol.

What is 3-Hydroxybenzoic acid used for?

Known uses and roles of 3-Hydroxybenzoic acid include skin conditioning agents in cosmetics and personal care, bacterial metabolite, eukaryotic metabolite, metabolite, plant metabolite and 4 more.

Is 3-Hydroxybenzoic acid hazardous?

3-Hydroxybenzoic acid carries the GHS signal word "Warning". Main hazards: harmful if swallowed, causes skin irritation, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of 3-Hydroxybenzoic acid?

3-Hydroxybenzoic acid 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 3-Hydroxybenzoic acid?

CompoundList lists 39 suppliers of 3-Hydroxybenzoic acid in China, United States, Germany, India and 8 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy 3-Hydroxybenzoic acid in India?

4 suppliers in India list 3-Hydroxybenzoic acid on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of 3-Hydroxybenzoic acid?

Suppliers quote 3-Hydroxybenzoic acid 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 3-Hydroxybenzoic acid

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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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