α-methylstyrene

Modify Date: 2025-08-20 16:10:31

α-methylstyrene Structure
α-methylstyrene structure
 Common Name α-methylstyrene
CAS Number 98-83-9 Molecular Weight 118.176
Density 0.9±0.1 g/cm3 Boiling Point 162.5±7.0 °C at 760 mmHg
Molecular Formula C9H10 Melting Point −24 °C(lit.)
MSDS Chinese USA Flash Point 45.6±0.0 °C
Symbol GHS02 GHS07 GHS09
GHS02, GHS07, GHS09		 Signal Word Warning

 Names

Name 2-Phenyl-1-propene
Synonym More Synonyms

 Chemical & Physical Properties

Density 0.9±0.1 g/cm3
Boiling Point 162.5±7.0 °C at 760 mmHg
Melting Point −24 °C(lit.)
Molecular Formula C9H10
Molecular Weight 118.176
Flash Point 45.6±0.0 °C
Exact Mass 118.078247
LogP 3.25
Vapour density 4.1 (vs air)
Vapour Pressure 2.8±0.1 mmHg at 25°C
Index of Refraction 1.510
Water Solubility insoluble

 Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :
WL5075300
CHEMICAL NAME :
Styrene, alpha-methyl-
CAS REGISTRY NUMBER :
98-83-9
LAST UPDATED :
199712
DATA ITEMS CITED :
40
MOLECULAR FORMULA :
C9-H10
MOLECULAR WEIGHT :
118.19
WISWESSER LINE NOTATION :
1YR&U1

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
Standard Draize test
ROUTE OF EXPOSURE :
Administration onto the skin
SPECIES OBSERVED :
Rodent - rabbit
TYPE OF TEST :
Standard Draize test
ROUTE OF EXPOSURE :
Administration into the eye
SPECIES OBSERVED :
Rodent - rabbit
TYPE OF TEST :
TCLo - Lowest published toxic concentration
ROUTE OF EXPOSURE :
Inhalation
SPECIES OBSERVED :
Human
DOSE/DURATION :
600 ppm
TOXIC EFFECTS :
Sense Organs and Special Senses (Olfaction) - effect, not otherwise specified Sense Organs and Special Senses (Eye) - effect, not otherwise specified
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
4900 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 :
3000 ppm
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 :
4500 mg/kg
TOXIC EFFECTS :
Behavioral - convulsions or effect on seizure threshold Lungs, Thorax, or Respiration - cyanosis Nutritional and Gross Metabolic - body temperature decrease
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Administration onto the skin
SPECIES OBSERVED :
Rodent - rabbit
DOSE/DURATION :
16 mL/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 - guinea pig
DOSE/DURATION :
3000 ppm
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 :
15 gm/kg/30D-I
TOXIC EFFECTS :
Kidney, Ureter, Bladder - proteinuria Blood - changes in leukocyte (WBC) count
TYPE OF TEST :
TCLo - Lowest published toxic concentration
ROUTE OF EXPOSURE :
Inhalation
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
50 mg/m3/6H/22W-I
TOXIC EFFECTS :
Behavioral - muscle contraction or spasticity Vascular - BP lowering not characterized in autonomic section Nutritional and Gross Metabolic - weight loss or decreased weight gain
TYPE OF TEST :
TCLo - Lowest published toxic concentration
ROUTE OF EXPOSURE :
Inhalation
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
5 mg/m3/24H/13W-C
TOXIC EFFECTS :
Brain and Coverings - recordings from specific areas of CNS Kidney, Ureter, Bladder - other changes in urine composition Blood - other changes
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
15 gm/kg/30D-I
TOXIC EFFECTS :
Nutritional and Gross Metabolic - weight loss or decreased weight gain

MUTATION DATA

TYPE OF TEST :
Sister chromatid exchange
TEST SYSTEM :
Human Lymphocyte
REFERENCE :
MUREAV Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 1964- Volume(issue)/page/year: 116,379,1983 *** REVIEWS *** ACGIH TLV-STEL 483 mg/m3 (100 ppm) DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: TLV/BEI,1997 ACGIH TLV-TWA 242 mg/m3 (50 ppm) DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: TLV/BEI,1997 *** U.S. STANDARDS AND REGULATIONS *** MSHA STANDARD:air-CL 100 ppm (480 mg/m3) DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: 3,170,1971 OSHA PEL (Gen Indu):CL 100 ppm (480 mg/m3) CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1910.1000,1994 OSHA PEL (Construc):CL 100 ppm (480 mg/m3) CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1926.55,1994 OSHA PEL (Shipyard):CL 100 ppm (480 mg/m3) CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1915.1000,1993 OSHA PEL (Fed Cont):CL 100 ppm (480 mg/m3) CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 41,50-204.50,1994 *** OCCUPATIONAL EXPOSURE LIMITS *** OEL-AUSTRALIA:TWA 50 ppm (240 mg/m3);STEL 100 ppm (485 mg/m3) JAN 1993 OEL-BELGIUM:TWA 50 ppm (242 mg/m3);STEL 100 ppm (484 mg/m3) JAN 1993 OEL-DENMARK:TWA 50 ppm (240 mg/m3) JAN 1993 OEL-FINLAND:TWA 100 ppm (480 mg/m3);STEL 150 ppm (720 mg/m3) JAN 1993 OEL-FRANCE:TWA 59 ppm (240 mg/m3) JAN 1993 OEL-GERMANY:TWA 100 ppm (480 mg/m3) JAN 1993 OEL-RUSSIA:STEL 5 mg/m3 JAN 1993 OEL-SWITZERLAND:TWA 50 ppm (240 mg/m3) JAN 1993 OEL-THAILAND:TWA 100 ppm (480 mg/m3) JAN 1993 OEL-UNITED KINGDOM:TWA 100 ppm (480 mg/m3);STEL 100 ppm JAN 1993 OEL IN BULGARIA, COLOMBIA, JORDAN, KOREA check ACGIH TLV OEL IN NEW ZEALAND, SINGAPORE, VIETNAM check ACGIH TLV *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH RECOMMENDED EXPOSURE LEVEL (REL) : NIOSH REL TO alpha-METHYLSTYRENE-air:10H TWA 50 ppm;STEL 100 ppm REFERENCE : NIOSH* National Institute for Occupational Safety and Health, U.S. Dept. of Health, Education, and Welfare, Reports and Memoranda. Volume(issue)/page/year: DHHS #92-100,1992 NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - M1533 No. of Facilities: 1933 (estimated) No. of Industries: 20 No. of Occupations: 32 No. of Employees: 24824 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - M1533 No. of Facilities: 354 (estimated) No. of Industries: 3 No. of Occupations: 4 No. of Employees: 3214 (estimated)

 Safety Information

Symbol GHS02 GHS07 GHS09
GHS02, GHS07, GHS09
Signal Word Warning
Hazard Statements H226-H319-H335-H411
Precautionary Statements P273-P305 + P351 + P338-P370 + P378-P391-P403 + P235-P501
Personal Protective Equipment Eyeshields;Faceshields;full-face respirator (US);Gloves;multi-purpose combination respirator cartridge (US);type ABEK (EN14387) respirator filter
Hazard Codes Xi:Irritant;
Risk Phrases R10;R36/37;R51/53
Safety Phrases S61
RIDADR UN 2303 3/PG 3
WGK Germany 2
RTECS WL5075300
Packaging Group III
Hazard Class 3
HS Code 2902909090

 Synthetic Route

 Customs

HS Code 2902909090
Summary 2902909090 other aromatic hydrocarbons。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:2.0%。General tariff:30.0%

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 Synonyms

2-Phenyl-2-propene
Prop-1-en-2-ylbenzene
2-methyl-2-phenylethene
α-methyl-styrene
AMS
A-METHYL STYRENE
1-methyl-1-phenyl-ethylene
2-Phenylpropylene
2-Phenylpropene
Benzene, isopropenyl-
Styrene, α-methyl-
UNII-D46R9753IK
β-Phenylpropene
2-phenyl-1-propen
β-Phenylpropylene
1-methyl-1-phenylethene
MFCD00008859
Benzene, (1-methylethenyl)-
α-methyl styrene
Isopropenylbenzene
α-Methylstyrene
EINECS 202-705-0
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