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Chemical Datasheet
P-CYMENE |
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Chemical Identifiers
CAS Number |
UN/NA Number |
DOT Hazard Label |
USCG CHRIS Code |
- 99-87-6
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|
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NIOSH Pocket Guide |
International Chem Safety Card |
none
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NFPA 704
General Description
Colorless liquid with a mild pleasant odor. Floats on water. (USCG, 1999)
Hazards
Reactivity Alerts
none
Air & Water Reactions
Insoluble in water.
Fire Hazard
Excerpt from 130
[Flammable Liquids (Water-Immiscible / Noxious)]:
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas (sewers, basements, tanks, etc.). Vapor explosion hazard indoors, outdoors or in sewers. Those substances designated with a (P) may polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids will float on water. (ERG, 2020)
Health Hazard
Inhalation causes impairment of coordination, headache. Contact with liquid causes mild irritation of eyes and skin. Ingestion causes irritation of mouth and stomach. (USCG, 1999)
Reactivity Profile
Vigorous reactions, sometimes amounting to explosions, can result from the contact between aromatic hydrocarbons, such as P-CYMENE, and strong oxidizing agents. They can react exothermically with bases and with diazo compounds. Substitution at the benzene nucleus occurs by halogenation (acid catalyst), nitration, sulfonation, and the Friedel-Crafts reaction.
Belongs to the Following Reactive Group(s)
Potentially Incompatible Absorbents
No information available.
Response Recommendations
Isolation and Evacuation
Excerpt from 130
[Flammable Liquids (Water-Immiscible / Noxious)]:
IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area for at least 50 meters (150 feet) in all directions.
LARGE SPILL: Consider initial downwind evacuation for at least 300 meters (1000 feet).
FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2020)
Firefighting
Fire Extinguishing Agents Not to Be Used: Water may be ineffective.
Fire Extinguishing Agents: Foam, dry chemical, carbon dioxide (USCG, 1999)
Non-Fire Response
Excerpt from 130
[Flammable Liquids (Water-Immiscible / Noxious)]:
ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area. All equipment used when handling the product must be grounded. Do not touch or walk through spilled material. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements or confined areas. A vapor-suppressing foam may be used to reduce vapors. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. Use clean, non-sparking tools to collect absorbed material.
LARGE SPILL: Dike far ahead of liquid spill for later disposal. Water spray may reduce vapor, but may not prevent ignition in closed spaces. (ERG, 2020)
Protective Clothing
Self-contained or air-line breathing apparatus; solvent- resistant rubber gloves; chemical splash goggles. (USCG, 1999)
DuPont Tychem® Suit Fabrics
No information available.
First Aid
INHALATION: remove victim from contaminated area; administer artificial respiration if necessary; call physician.
EYES: flush with water for 15 min.; call a physician.
SKIN: wipe off liquid; wash well with soap and water.
INGESTION: induce vomiting; get medical attention. (USCG, 1999)
Physical Properties
Flash Point:
117°F
(USCG, 1999)
Lower Explosive Limit (LEL):
0.7 %
(USCG, 1999)
Upper Explosive Limit (UEL):
5.6 %
(USCG, 1999)
Autoignition Temperature:
817°F
(USCG, 1999)
Melting Point:
-90.2°F
(USCG, 1999)
Vapor Pressure: data unavailable
Vapor Density (Relative to Air): data unavailable
Specific Gravity:
0.857
at 68°F
(USCG, 1999)
- Less dense than water; will float
Boiling Point:
351°F
at 760 mmHg
(USCG, 1999)
Molecular Weight:
134.2
(USCG, 1999)
Water Solubility: data unavailable
Ionization Energy/Potential: data unavailable
IDLH: data unavailable
AEGLs (Acute Exposure Guideline Levels)
No AEGL information available.
ERPGs (Emergency Response Planning Guidelines)
No ERPG information available.
PACs (Protective Action Criteria)
Chemical |
PAC-1 |
PAC-2 |
PAC-3 |
|
Isopropyltoluene, 4-; (p-Cymene) (99-87-6)
|
120 mg/m3 |
1300 mg/m3 |
1900 mg/m3 |
LEL = 7000 ppm |
(DOE, 2018)
Regulatory Information
EPA Consolidated List of Lists
No regulatory information available.
CISA Chemical Facility Anti-Terrorism Standards (CFATS)
No regulatory information available.
OSHA Process Safety Management (PSM) Standard List
No regulatory information available.
Alternate Chemical Names
- CYMENE
- CYMOL
- ISOPROPYLTOLUOL
- 1-METHYL-4-ISOPROPYLBENZENE
- METHYLPROPYLBENZENE
- P-CYMENE
- P-ISOPROPYLTOLUENE