AMS MSDS

MDL INFORMATION SYSTEMS, INC.
1281 Murfreesboro Road, Suite 300
Nashville, TN 37217-2423
1-615-366-2000

EMERGENCY TELEPHONE NUMBER:
1-800-424-9300 (NORTH AMERICA)
1-703-527-3887 (INTERNATIONAL)

SUBSTANCE: ALPHA-METHYL STYRENE

TRADE NAMES/SYNONYMS:
1-METHYLETHENYL BENZINE; 1-METHYL-1-PHENYLETHENE; ISOPROPENYLBENZENE;
PHENYLPROPYLENE; 1-METHYL-1-PHENYLETHYLENE; AS-METHYLPHENYLETHYLENE;
2-PHENYLPROPENE; BETA-PHENYLPROPENE; 2-PHENYLPROPYLENE; BETA-PHENYLPROPYLENE;
C9H10; OHS00810; RTECS WL5075300

CHEMICAL FAMILY: styrene

CREATION DATE: Apr 30 1985

REVISION DATE: Sep 10 1998

CAS NUMBER: 98-83-9

EC NUMBER (EINECS): 202-705-0

EC INDEX NUMBER: 601-027-00-6

PERCENTAGE: 100

OTHER CONTAMINANTS:
10-20 PPM TERT-BUTYLCATECHOL AS POLYMERIZATION INHIBITOR

EC CLASSIFICATION (ASSIGNED):
Flammable
Xi Irritant

R 10-36/37

EC Classification may be inconsistent with independently-researched data.

EMERGENCY OVERVIEW:

COLOR: colorless
PHYSICAL FORM: liquid
ODOR: distinct odor
MAJOR HEALTH HAZARDS:
respiratory tract irritation, skin irritation, eye
irritation, central nervous system depression
PHYSICAL HAZARDS: Flash back hazard. Combustible liquid and vapor. May
polymerize. Containers may rupture or explode.

POTENTIAL HEALTH EFFECTS:

INHALATION:
SHORT TERM EXPOSURE:

irritation, difficulty breathing, headache, symptoms of drunkenness, kidney damage, liver damage

LONG TERM EXPOSURE: nausea, vomiting
SKIN CONTACT:
SHORT TERM EXPOSURE: irritation
LONG TERM EXPOSURE: blisters, rash
EYE CONTACT:
SHORT TERM EXPOSURE: irritation, tearing
LONG TERM EXPOSURE: same as effects reported in short term exposure
INGESTION:
SHORT TERM EXPOSURE: no information on significant adverse effects
LONG TERM EXPOSURE: nausea, vomiting, headache, symptoms of drunkenness

CARCINOGEN STATUS:
OSHA: N
NTP: N
IARC: N

When safe to enter area, remove from exposure. Use a bag valve mask or similar device to perform artificial respiration (rescue breathing) if needed. Keep warm and at rest. Get medical attention immediately.

SKIN CONTACT:

Remove contaminated clothing, jewelry, and shoes immediately.
Wash with soap or mild detergent and large amounts of water until no evidence of chemical remains (at least 15-20 minutes). Get medical attention, if needed.

EYE CONTACT:

Wash eyes immediately with large amounts of water or normal saline, occasionally lifting upper and lower lids, until no evidence of chemical remains. Get medical attention immediately.

INGESTION:

Never make an unconscious person vomit or drink fluids. Give large amounts of water or milk. Do not induce vomiting. If vomiting occurs, keep head lower than hips to help prevent aspiration. If person is unconscious, turn head to side. Get medical attention immediately.

NOTE TO PHYSICIAN:

For inhalation, consider oxygen. Avoid gastric lavage or emesis.

Moderate fire hazard. Vapor/air mixtures are explosive above flash point. The vapor is heavier than air. Vapors or gases may ignite at distant ignition sources and flash back.

EXTINGUISHING MEDIA:

regular dry chemical, carbon dioxide, water, regular foam

Large fires: Use regular foam or flood with fine water spray.

FIRE FIGHTING:

Move container from fire area if it can be done without risk.
Cool containers with water spray until well after the fire is out. Stay away from the ends of tanks. For fires in cargo or storage area: Cool containers with water from unmanned hose holder or monitor nozzles until well after fire is out. If this is impossible then take the following precautions: Keep unnecessary people away, isolate hazard area and deny entry. Let the fire burn. Withdraw immediately in case of rising sound from venting safety device or any discoloration of tanks due to fire. For tank, rail car or tank truck: Evacuation radius: 800 meters (1/2 mile). Do not attempt to extinguish fire unless flow of material can be stopped first. Flood with fine water spray. Do not scatter spilled material with high-pressure water streams. Cool containers with water spray until well after the fire is out. Apply water from a protected location or from a safe distance. Avoid inhalation of material or combustion by-products. Stay upwind and keep out of low areas.

FLASH POINT: 129 F (54 C) (CC)
LOWER FLAMMABLE LIMIT: 1.9%
UPPER FLAMMABLE LIMIT: 6.1%
AUTOIGNITION: 1065 F (574 C)
FLAMMABILITY CLASS (OSHA): II

Avoid heat, flames, sparks and other sources of ignition. Stop leak if
possible without personal risk. Reduce vapors with water spray. Small spills: Absorb with sand or other non-combustible material. Collect spilled material in appropriate container for disposal. Large spills: Dike for later disposal. Remove sources of ignition. Keep unnecessary people away, isolate hazard area
and deny entry.

EXPOSURE LIMITS:

ALPHA-METHYL STYRENE:

100 ppm (480 mg/m3) OSHA ceiling
50 ppm (242 mg/m3) OSHA TWA (vacated by 58 FR 35338, June 30, 1993)
100 ppm (483 mg/m3) OSHA STEL (vacated by 58 FR 35338, June 30, 1993)
50 ppm (242 mg/m3) ACGIH TWA
100 ppm (483 mg/m3) ACGIH STEL
50 ppm (242 mg/m3) NIOSH recommended TWA 10 hour(s)
100 ppm (483 mg/m3) NIOSH recommended STEL

VENTILATION:

Provide local exhaust ventilation system. Ventilation equipment should be explosion-resistant if explosive concentrations of material are present. Ensure compliance with applicable exposure limits.

EYE PROTECTION:

Wear splash resistant safety goggles. Provide an emergency eye
wash fountain and quick drench shower in the immediate work area.

CLOTHING: Wear appropriate chemical resistant clothing.

GLOVES: Wear appropriate chemical resistant gloves.

RESPIRATOR:

The following respirators and maximum use concentrations are drawn
from NIOSH and/or OSHA.

500 ppm
Any chemical cartridge respirator with organic vapor cartridge(s).
Any supplied-air respirator.

700 ppm
Any supplied-air respirator.
Any chemical cartridge respirator with a full facepiece and organic vapor
cartridge(s).
Any air-purifying respirator with a full facepiece and an organic vapor
canister.
Any powered, air-purifying respirator with organic vapor cartridge(s).
Any self-contained breathing apparatus with a full facepiece.
Any supplied-air respirator with a full facepiece.

Escape -
Any air-purifying respirator with a full facepiece and an organic vapor
canister.
Any appropriate escape-type, self-contained breathing apparatus.

For Unknown Concentrations or Immediately Dangerous to Life or Health -
Any supplied-air respirator with full facepiece and operated in a
pressure-demand or other positive-pressure mode in combination with a
separate escape supply.
Any self-contained breathing apparatus with a full facepiece.

APPEARANCE: clear

COLOR: colorless

ODOR: distinct odor

MOLECULAR WEIGHT: 118.19

MOLECULAR FORMULA: C9-H10

BOILING POINT: 329 F (165 C)

FREEZING POINT: -9 F (-23 C)

VAPOR PRESSURE: 2 mmHg @ 20 C

VAPOR DENSITY (air=1): 4.1

SPECIFIC GRAVITY (water=1): 0.9

WATER SOLUBILITY: insoluble

PH: Not available

VOLATILITY: Not available

ODOR THRESHOLD: <10 ppm

EVAPORATION RATE: Not available

COEFFICIENT OF WATER/OIL DISTRIBUTION: Not available

SOLVENT SOLUBILITY: Soluble: alcohol, ether

May polymerize. Avoid contact with light or storage and use above
room temperature.

CONDITIONS TO AVOID:

Avoid heat, flames, sparks and other sources of ignition.
Containers may rupture or explode if exposed to heat. Keep out of water supplies and sewers.

INCOMPATIBILITIES:

metals, halogens, metal salts, oxidizing materials, peroxides, combustible materials

HAZARDOUS DECOMPOSITION:

Thermal decomposition products: miscellaneous decomposition products

POLYMERIZATION:

Avoid contact with heat, air, light, initiators or curing agents. May polymerize with evolution of heat. Closed containers may rupture violently.

IRRITATION DATA:
100 percent skin-rabbit moderate; 91 mg eyes-rabbit mild

TOXICITY DATA: 4900 mg/kg oral-rat LD50

LOCAL EFFECTS: Irritant: inhalation, skin, eye

ACUTE TOXICITY LEVEL: Moderately Toxic: ingestion

TARGET ORGANS: central nervous system

MEDICAL CONDITIONS AGGRAVATED BY EXPOSURE:

respiratory disorders, skin disorders and allergies

MUTAGENIC DATA: Available.

TSCA INVENTORY STATUS: Y

TSCA 12(b) EXPORT NOTIFICATION: Not listed.
CERCLA SECTION 103 (40CFR302.4): N
SARA SECTION 302 (40CFR355.30): N
SARA SECTION 304 (40CFR355.40): N
SARA SECTION 313 (40CFR372.65): N
SARA HAZARD CATEGORIES, SARA SECTIONS 311/312 (40CFR370.21):

ACUTE: Y
CHRONIC: N
FIRE: Y
REACTIVE: Y
SUDDEN RELEASE: N
OSHA PROCESS SAFETY (29CFR1910.119): N

STATE REGULATIONS:
California Proposition 65: N

EUROPEAN REGULATIONS:

EC NUMBER (EINECS): 202-705-0
EC RISK AND SAFETY PHRASES:
R 10 Flammable.
R 36/37 Irritating to eyes and respiratory system.

S 2 Keep out of reach of children.

CONCENTRATION LIMITS:
C>=25% Xi R 36/37

BITEK CHEMS Inc
Software Division
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