C6H6O2
110.11 g/mol
Industrial ChemicalDanger
Catechol
CAS120-80-9EC204-427-5
Category
Industrial Chemical
Compound Class
Aromatic
Primary Use
antioxidant intermediate and photographic developer
Catechol is an organic compound used primarily as an intermediate in the production of antioxidants and as a photographic developer. According to the International Agency for Research on Cancer (IARC), catechol can cause cancer.
antioxidant intermediate in rubber and lubricating oilsphotographic developerdeveloper for fur dyes
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.
Restricted or banned substances
Substances on this list are banned or restricted under the named regulation. This page is a compliance reference — verify your obligations under applicable law.
Relevant lists:California Proposition 65
CAS 120-80-9
Related Compounds
ReferenceSame Category
1,2,4-trichlorobenzene
CAS120-82-1
Solvent and chemical intermediate
ReferenceSame Category
2,4-dichlorophenol
CAS120-83-2
Intermediate for herbicides and biocides
ReferenceSame Category
Cyclopentanone
CAS120-92-3
Solvent and intermediate for pharmaceuticals and insecticides
ReferenceSame Category
2-imidazolidinone
CAS120-93-4
Industrial chemical for polymers and coatings
Referencestereoisomer of
1,2-Dihydroxybenzene-d6
CAS202656-22-2
research compound
Referencestereoisomer of
1,2-Dihydroxybenzene-1-13c
CAS334974-04-8
research compound
Referencestereoisomer of
3,4,5,6-Tetradeuteriobenzene-1,2-diol
CAS103963-58-2
research compound
Safety Reference
Danger
H301Toxic if swallowed
H311Toxic in contact with skin
H315Causes skin irritation
H319Causes serious eye irritation
H341Suspected of causing genetic defects
H350May cause cancer
H302Harmful if swallowed
H312Harmful in contact with skin
H317May cause an allergic skin reaction
H412Harmful to aquatic life with long lasting effects
H318Causes serious eye damage
H335May cause respiratory irritation
H351Suspected of causing cancer
H361Suspected of damaging fertility or the unborn child
H370Causes damage to organs
H401Toxic to aquatic life
H314Causes severe skin burns and eye damage
H372Causes damage to organs through prolonged or repeated exposure
H373May cause damage to organs through prolonged or repeated exposure
H332Harmful if inhaled
Customs Tariff Classification
The international HS code for Catechol (CAS 120-80-9) is 2907.29.
HS code (international, 6-digit)
2907.29
EU CN code (8-digit)
2907 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
benzene-1,2-diol
InChIKey
YCIMNLLNPGFGHC-UHFFFAOYSA-N
SMILES
C1=CC=C(C(=C1)O)O
Synonyms (71)
- CAQ
- Pyrocatechol; Guaiacol EP Impurity A
- 1,2-Benzenediol; Catechol
- 1,2-Dihydroxybenzene, XI
- 1,2-benzenediol
- 1,2-dihydroxybenzene
- 1,a2-aBenzenediol
- 2-hydroxyphenol
- 3fw4
- 4k7i
- 4oow
- Benzene, o-dihydroxy-
- Brenzcatechin
- C.I. Oxidation Base 26
- Catechin (phenol)
- Catechol (phenol)
- Catechol-pyrocatechol
- Durafur developer C
- Fouramine PCH
- Fourrine 68
- Guaifenesin Impurity 7
- Kachin
- Katechol
- Katechol [Czech]
- Oxyphenate
- Oxyphenic acid
- Pelagol Grey C
- Phthalhydroquinone
- Phthalic alcohol
- Pyrocatechine
- Pyrocatechinic acid
- Pyrocatechol, p.a.
- Pyrokatechin
- Pyrokatechin [Czech]
- Pyrokatechol
- Pyrokatechol [Czech]
- alpha-hydroxyphenol
- benzene-1,2-diol
- benzenediol
- catechol
- o-Benzenediol
- o-Dihydroxybenzene
- o-Dioxybenzene
- o-Diphenol
- o-Hydroquinone
- o-Hydroxyphenol
- o-Phenylenediol
- ortho-Benzenediol
- ortho-Dihydroxybenzene
- ortho-Dioxybenzene
- ortho-Hydroquinone
- ortho-Hydroxyphenol
- ortho-Phenylenediol
- ortho-Quinol
- ortho-diphenol
- phenol derivative, 2
- pyrocatechin
- pyrocatechol