Common Name	tert-Butylhydroquinone
CAS Number	1948-33-0
Molecular Weight	166.217
Density	1.1±0.1 g/cm3
Boiling Point	291.4±20.0 °C at 760 mmHg
Molecular Formula	C10H14O2
Melting Point	127-129 °C(lit.)
MSDS	Chinese USA
Flash Point	138.7±16.4 °C
Symbol	GHS07
Signal Word	Warning

Density	1.1±0.1 g/cm3
Boiling Point	291.4±20.0 °C at 760 mmHg
Melting Point	127-129 °C(lit.)
Molecular Formula	C10H14O2
Molecular Weight	166.217
Flash Point	138.7±16.4 °C
Exact Mass	166.099380
PSA	40.46000
LogP	2.33
Vapour Pressure	0.0±0.6 mmHg at 25°C
Index of Refraction	1.545
Stability	Stable. Incompatible with strong bases, strong oxidizing agents.

CHEMICAL IDENTIFICATION
RTECS NUMBER :
MX4375000
CHEMICAL NAME :
Hydroquinone, tert-butyl-
CAS REGISTRY NUMBER :
1948-33-0
BEILSTEIN REFERENCE NO. :
0637923
LAST UPDATED :
199712
DATA ITEMS CITED :
24
MOLECULAR FORMULA :
C10-H14-O2
MOLECULAR WEIGHT :
166.24
WISWESSER LINE NOTATION :
QR DQ BX1&1&1
HEALTH HAZARD DATA
ACUTE TOXICITY DATA
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
700 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LCLo - Lowest published lethal concentration
ROUTE OF EXPOSURE :
Inhalation
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
2900 mg/m3/4H
TOXIC EFFECTS :
Sense Organs and Special Senses (Eye) - effect, not otherwise specified Behavioral - ataxia Lungs, Thorax, or Respiration - dyspnea
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
300 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
1 gm/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
144 mg/kg
TOXIC EFFECTS :
Behavioral - tremor Behavioral - muscle weakness
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - guinea pig
DOSE/DURATION :
790 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
16250 mg/kg/13W-C
TOXIC EFFECTS :
Blood - changes in spleen Nutritional and Gross Metabolic - weight loss or decreased weight gain
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
10054 ng/kg/12D-I
TOXIC EFFECTS :
Liver - other changes Liver - changes in liver weight Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - hepatic microsomal mixed oxidase (dealkylation, hydroxylation, etc.)
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
78 gm/kg/13W-C
TOXIC EFFECTS :
Sense Organs and Special Senses (Olfaction) - effect, not otherwise specified Gastrointestinal - other changes Skin and Appendages - dermatitis, other (after systemic exposure)
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
DOSE :
32500 mg/kg
SEX/DURATION :
female 13 week(s) pre-mating
TOXIC EFFECTS :
Reproductive - Maternal Effects - other effects Reproductive - Effects on Newborn - viability index (e.g., # alive at day 4 per # born alive)
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
DOSE :
39 gm/kg
SEX/DURATION :
male 13 week(s) pre-mating
TOXIC EFFECTS :
Reproductive - Paternal Effects - testes, epididymis, sperm duct
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
DOSE :
39 gm/kg
SEX/DURATION :
male 13 week(s) pre-mating
TOXIC EFFECTS :
Reproductive - Fertility - mating performance (e.g. # sperm positive females per # females mated; # copulations per # estrus cycles)
TYPE OF TEST :
Unscheduled DNA synthesis
TYPE OF TEST :
Cytogenetic analysis
TYPE OF TEST :
Sister chromatid exchange
MUTATION DATA
TYPE OF TEST :
Mutation in mammalian somatic cells
TEST SYSTEM :
Rodent - hamster Lung
DOSE/DURATION :
1700 ug/L
REFERENCE :
MUREAV Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 1964- Volume(issue)/page/year: 280,17,1992 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - X7157 No. of Facilities: 892 (estimated) No. of Industries: 12 No. of Occupations: 21 No. of Employees: 18166 (estimated) No. of Female Employees: 3687 (estimated)

Symbol	GHS07
Signal Word	Warning
Hazard Statements	H302-H315-H319-H335
Precautionary Statements	P261-P305 + P351 + P338
Personal Protective Equipment	dust mask type N95 (US);Eyeshields;Gloves
Hazard Codes	Xn:Harmful
Risk Phrases	R22
Safety Phrases	S26-S36-S28A
RIDADR	UN3077
WGK Germany	3
RTECS	MX4375000
Packaging Group	III
Hazard Class	9
HS Code	29072900

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