Note: Ingredients listed on restricted chemical lists
EC/CAS
123-31-9
Name of the chemical
1,4-Dihydroxybenzol (790/2009)
Concentration
<=100
General Information
Version
5
Revision date
2026-07-25
Product name
Hydroquinone
Product Synonyms
1,4-Dihydroxybenzene; 1,4-Benzenediol
CAS No.
123-31-9
supplier name
Avocado Research Chemicals Ltd
Emergency telephone
001-201-796-7100, +32 14 57 52 99, 001-800-424-9300, 001-703-527-3887
Icons in SDS
Company Information
company name
Avocado Research Chemicals Ltd
e-mail address of the competent person responsible for the Safety Data Sheet
begel.sdsdesk@thermofisher.com
GHS Information
Signal word
Danger
Hazard Codes
Hazard statements (CLP)
H302, H317, H318, H341, H351, H410
Hazard statements
Code
Statements
H302
Harmful if swallowed
Section 2
SECTION 2: Hazards identification
Physical State
Appearance/Odor
Solid Off-white Odorless Emergency Overview May cause an allergic skin reaction. Causes serious eye damage. Suspected of causing genetic defects. Harmful to aquatic life. Very toxic to aquatic life with long lasting effects. Harmful if swallowed. Suspected of causing cancer. May form combustible dust concentrations in air. Classification of the substance or mixture Acute Oral Toxicity Category 4 Serious Eye Damage/Eye Irritation Category 1 Skin Sensitization Category 1 Germ Cell Mutagenicity Category 2 Carcinogenicity Category 2 Acute aquatic toxicity Category 1 Category 3 Chronic aquatic toxicity Category 1 Label Elements
Signal word
Danger Hazard Statements H317 - May cause an allergic skin reaction H318 - Causes serious eye damage H341 - Suspected of causing genetic defects H410 - Very toxic to aquatic life with long lasting effects H302 - Harmful if swallowed H351 - Suspected of causing cancer
Prevention
P201 - Obtain special instructions before use P202 - Do not handle until all safety precautions have been read and understood P261 - Avoid breathing dust/fume/gas/mist/vapors/spray P264 - Wash face, hands and any exposed skin thoroughly after handling P270 - Do not eat, drink or smoke when using this product P272 - Contaminated work clothing should not be allowed out of the workplace P280 - Wear protective gloves/protective clothing/eye protection/face protection
Response
P302 + P352 - IF ON SKIN: Wash with plenty of soap and water P305 + P351 + P338 - IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing P310 - Immediately call a POISON CENTER or doctor P330 - Rinse mouth P363 - Wash contaminated clothing before reuse
Storage
P403 + P233 - Store in a well-ventilated place. Keep container tightly closed
Disposal
P501 - Dispose of contents/ container to an approved waste disposal plant
Other physicochemical hazards
None identified. May form combustible dust concentrations in air.
Health hazards
May cause an allergic skin reaction. Causes serious eye damage. Suspected of causing genetic defects. Harmful if swallowed. Suspected of causing cancer.
Environmental hazards
Harmful to aquatic life. Very toxic to aquatic life with long lasting effects. . Will likely be mobile in the environment due to its water solubility. The product is water soluble, and may spread in water systems.
2.3 Other hazards
Toxic to terrestrial vertebrates. This product does not contain any known or suspected endocrine disruptors. May form explosible dust-air mixture if dispersed.
2.1 Classification of the substance or mixture
Acute Oral Toxicity Category 4 Serious Eye Damage/Eye Irritation Category 1 Skin Sensitization Category 1 Germ Cell Mutagenicity Category 2 Carcinogenicity Category 2 Acute aquatic toxicity Category 1 Category 3 Chronic aquatic toxicity