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Substance Name: Hydroquinone [USP]
RN: 123-31-9
UNII: XV74C1N1AE
InChIKey: QIGBRXMKCJKVMJ-UHFFFAOYSA-N
Molecular Formula
- C6-H6-O2
Molecular Weight
- 110.1114
- All
- Classifications
- Links to Resources
- Names & Synonyms
- Registry Numbers
- Structure Descriptors
- Toxicity
- Physical Properties
Classification Codes
Classification Codes
- Antioxidants
- Depigmentor
- Human Data
- Mutagens
- Mutation Data
- Noxae
- Protective Agents
- Radiation-Protective Agents
- Reproductive Effect
- Skin / Eye Irritant
- Tumor Data
Superlist Classification Codes
- Overall Carcinogenic Evaluation: Group 3
- Reportable Quantity (RQ) = 100 lb
- Threshold Planning Quantity (TPQ) = 500/10000 lb
- TWA 2 mg/m3
- TWA 2 mg/m3; Confirmed animal carcinogen with unknown relevance to humans
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Other Resources (Internet Locators)
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Names and Synonyms
Name of Substance
- 1,4-Benzenediol
- Hydroquinone
- Hydroquinone [USP]
- p-Hydroxyphenol
Synonyms
- 1,4-Benzenediol
- 1,4-Dihydroxy-benzeen
- 1,4-Dihydroxy-benzeen [Dutch]
- 1,4-Dihydroxy-benzol
- 1,4-Dihydroxy-benzol [German]
- 1,4-Dihydroxybenzen
- 1,4-Dihydroxybenzen [Czech]
- 1,4-Dihydroxybenzene
- 1,4-Diidrobenzene
- 1,4-Diidrobenzene [Italian]
- 4-Hydroxyphenol
- AI3-00072
- Arctuvin
- Benzene, p-dihydroxy-
- Benzohydroquinone
- Benzoquinol
- Black and White Bleaching Cream
- CCRIS 714
- Derma-Blanch
- Diak 5
- EC 204-617-8
- EINECS 204-617-8
- Eldopaque
- Eldopaque Forte
- Eldoquin
- Eldoquin Forte
- Epiquin
- HE 5
- Hidroquinone
- HSDB 577
- Hydrochinon
- Hydrochinon [Czech, Polish]
- Hydroquinol
- Hydroquinole
- Hydroquinone
- Idrochinone
- Idrochinone [Italian]
- NCI-C55834
- NSC 9247
- p-Benzenediol
- p-Dihydroxybenzene
- p-Dioxybenzene
- p-Hydroquinone
- p-Hydroxyphenol
- para-Dihydroxybenzene
- para-Dioxybenzene
- para-Hydroquinone
- Phiaquin
- Pyrogentistic acid
- Quinol
- Solaquin Forte
- Sunvanish
- Tecquinol
- Tenox HQ
- Tequinol
- UNII-XV74C1N1AE
- USAF EK-356
Systematic Names
- 1,4-Benzenediol
- Hydroquinone
Superlist Names
- Dihydroxybenzene
- Hydroquinone
- Hydroquinone [UN2662] [Poison]
- UN2662
Mixture Name
- Artra
Registry Numbers
CAS Registry Number
- 123-31-9
FDA UNII
- XV74C1N1AE
Other Registry Numbers
- 57534-13-1
- 8027-02-9
System Generated Number
- 0000123319
Structure Descriptors
InChI
InChI=1S/C6H6O2/c7-5-1-2-6(8)4-3-5/h1-4,7-8HInChIKey
QIGBRXMKCJKVMJ-UHFFFAOYSA-NSmiles
Oc1ccc(O)Toxicity
Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
---|---|---|---|---|---|
cat | LD50 | oral | 50mg/kg (50mg/kg) | National Technical Information Service. Vol. OTS0555537, | |
cat | LDLo | subcutaneous | 50mg/kg (50mg/kg) | BEHAVIORAL: TREMOR VASCULAR: REGIONAL OR GENERAL ARTERIOLAR OR VENOUS DILATION BLOOD: METHEMOGLOBINEMIA-CARBOXYHEMOGLOBIN | Archiv fuer Experimentelle Pathologie und Pharmakologie. Vol. 72, Pg. 241, 1913. |
dog | LD50 | oral | 200mg/kg (200mg/kg) | GASTROINTESTINAL: NAUSEA OR VOMITING BEHAVIORAL: EXCITEMENT BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD | Federation Proceedings, Federation of American Societies for Experimental Biology. Vol. 8, Pg. 348, 1949. |
dog | LDLo | intravenous | 80mg/kg (80mg/kg) | "Handbook of Toxicology," 4 vols., Philadelphia, W.B. Saunders Co., 1956-59Vol. 1, Pg. 162, 1955. | |
dog | LDLo | subcutaneous | 100mg/kg (100mg/kg) | Naunyn-Schmiedeberg's Archiv fuer Experimentelle Pathologie und Pharmakologie. Vol. 183, Pg. 319, 1936. | |
frog | LDLo | parenteral | 190mg/kg (190mg/kg) | PERIPHERAL NERVE AND SENSATION: SPASTIC PARALYSIS WITH OR WITHOUT SENSORY CHANGE CARDIAC: OTHER CHANGES BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD | Naunyn-Schmiedeberg's Archiv fuer Experimentelle Pathologie und Pharmakologie. Vol. 166, Pg. 437, 1932. |
frog | LDLo | subcutaneous | 190mg/kg (190mg/kg) | "Handbook of Toxicology," 4 vols., Philadelphia, W.B. Saunders Co., 1956-59Vol. 1, Pg. 160, 1955. | |
guinea pig | LD50 | oral | 550mg/kg (550mg/kg) | BEHAVIORAL: TREMOR BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD BEHAVIORAL: EXCITEMENT | Federation Proceedings, Federation of American Societies for Experimental Biology. Vol. 8, Pg. 348, 1949. |
guinea pig | LDLo | intraperitoneal | 200mg/kg (200mg/kg) | "Handbook of Toxicology," 4 vols., Philadelphia, W.B. Saunders Co., 1956-59Vol. 1, Pg. 162, 1955. | |
guinea pig | LDLo | subcutaneous | 300mg/kg (300mg/kg) | "Handbook of Toxicology," 4 vols., Philadelphia, W.B. Saunders Co., 1956-59Vol. 1, Pg. 162, 1955. | |
human | LDLo | oral | 29mg/kg (29mg/kg) | "Toxicology of Drugs and Chemicals," Deichmann, W.B., New York, Academic Press, Inc., 1969Vol. -, Pg. 321, 1969. | |
human | TDLo | oral | 170mg/kg (170mg/kg) | LUNGS, THORAX, OR RESPIRATION: CYANOSIS CARDIAC: PULSE RATE INCREASE WITHOUT FALL IN BP BEHAVIORAL: COMA | Annales de Medecine Legale. Criminologie, Police Scientifique et Toxicologie. Vol. 7, Pg. 79, 1927. |
mammal (species unspecified) | LD50 | oral | 480mg/kg (480mg/kg) | LUNGS, THORAX, OR RESPIRATION: DYSPNEA BEHAVIORAL: MUSCLE CONTRACTION OR SPASTICITY) BEHAVIORAL: CHANGES IN MOTOR ACTIVITY (SPECIFIC ASSAY) | Toksikologiya Novykh Promyshlennykh Khimicheskikh Veshchestv. Toxicology of New Industrial Chemical Substances. For English translation, see TNICS*. Vol. 15, Pg. 136, 1979. |
mammal (species unspecified) | LD50 | skin | 5970mg/kg (5970mg/kg) | Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 45(10), Pg. 16, 1980. | |
mouse | LD50 | intraperitoneal | 100mg/kg (100mg/kg) | National Technical Information Service. Vol. AD414-344, | |
mouse | LD50 | oral | 245mg/kg (245mg/kg) | Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 38(8), Pg. 6, 1973. | |
mouse | LD50 | subcutaneous | 182mg/kg (182mg/kg) | Zeitschrift fuer die Gesamte Innere Medizin und Ihre Grenzgebiete. Vol. 2, Pg. 333, 1947. | |
mouse | LD50 | unreported | 150mg/kg (150mg/kg) | British Journal of Cancer. Vol. 6, Pg. 160, 1952. | |
pigeon | LD50 | oral | 300mg/kg (300mg/kg) | GASTROINTESTINAL: NAUSEA OR VOMITING BEHAVIORAL: EXCITEMENT BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD | Federation Proceedings, Federation of American Societies for Experimental Biology. Vol. 8, Pg. 348, 1949. |
rabbit | LD50 | intraperitoneal | 125mg/kg (125mg/kg) | Ecotoxicology and Environmental Safety. Vol. 19, Pg. 327, 1990. | |
rabbit | LD50 | oral | 200mg/kg (200mg/kg) | International Polymer Science and Technology. Vol. 3, Pg. 93, 1976. | |
rabbit | LDLo | intravenous | 100mg/kg (100mg/kg) | Agressologie. Revue Internationale de Physio-Biologie et de Pharmacologie Appliquees aux Effets de l'Agression. Vol. 3, Pg. 311, 1962. | |
rat | LD50 | intraperitoneal | 170mg/kg (170mg/kg) | Ecotoxicology and Environmental Safety. Vol. 19, Pg. 327, 1990. | |
rat | LD50 | intravenous | 115mg/kg (115mg/kg) | BEHAVIORAL: TREMOR BEHAVIORAL: EXCITEMENT BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD | Federation Proceedings, Federation of American Societies for Experimental Biology. Vol. 8, Pg. 348, 1949. |
rat | LD50 | oral | 302mg/kg (302mg/kg) | National Technical Information Service. Vol. OTS0555537, | |
rat | LD50 | unreported | 720mg/kg (720mg/kg) | Gigiena Truda i Professional'naya Patologiya v Estonskoi SSR. Labor Hygiene and Occupational Pathology in the Estonian SSR. Vol. 8, Pg. 145, 1972. | |
rat | LDLo | subcutaneous | 300mg/kg (300mg/kg) | "Handbook of Toxicology," 4 vols., Philadelphia, W.B. Saunders Co., 1956-59Vol. 1, Pg. 162, 1955. |
Physical Properties
Physical Property | Value | Units | Temp (deg C) | Source |
---|---|---|---|---|
Melting Point | 172.3 | deg C | EXP | |
Boiling Point | 287 | deg C | EXP | |
pKa Dissociation Constant | 10.85 | (none) | 25 | EXP |
log P (octanol-water) | 0.59 | (none) | EXP | |
Water Solubility | 7.20E+04 | mg/L | 25 | EXP |
Henry's Law Constant | 4.73E-11 | atm-m3/mole | 25 | EST |
Atmospheric OH Rate Constant | 2.32E-11 | cm3/molecule-sec | 25 | EST |
Physical property data is provided to ChemIDplus by SRC, Inc.