P-XYLENE | CAMEO Chemicals | NOAA (2024)


Chemical Datasheet

P-XYLENE | CAMEO Chemicals | NOAA (1)

ChemicalIdentifiers | Hazards | ResponseRecommendations |PhysicalProperties |RegulatoryInformation | AlternateChemicalNames

Chemical Identifiers

What is this information?

The Chemical Identifier fields include common identification numbers, theNFPA diamond U.S. Department of Transportation hazard labels, and a general description of the chemical. The information in CAMEO Chemicals comes from a variety of data sources.

CAS Number UN/NA Number DOT Hazard Label USCG CHRIS Code
  • 106-42-3 P-XYLENE | CAMEO Chemicals | NOAA (2)
  • 1307
  • Flammable Liquid
  • P-XYLENE | CAMEO Chemicals | NOAA (3) XLP
NIOSH Pocket Guide International Chem Safety Card
p-XyleneP-XYLENE | CAMEO Chemicals | NOAA (4)

NFPA 704

Diamond Hazard Value Description
P-XYLENE | CAMEO Chemicals | NOAA (6) Health 2 Can cause temporary incapacitation or residual injury.
P-XYLENE | CAMEO Chemicals | NOAA (7) Flammability 3 Can be ignited under almost all ambient temperature conditions.
P-XYLENE | CAMEO Chemicals | NOAA (8) Instability 0 Normally stable, even under fire conditions.
P-XYLENE | CAMEO Chemicals | NOAA (9) Special

(NFPA, 2010)

General Description

A colorless watery liquid with a sweet odor. Less dense than water. Insoluble in water. Irritating vapor. Freezing point is 56°F. (USCG, 1999)


What is this information?

The Hazard fields include special hazard alerts air and water reactions, fire hazards, health hazards, a reactivity profile, and details about reactive groups assignments and potentially incompatible absorbents. The information in CAMEO Chemicals comes from a variety of data sources.

Reactivity Alerts

  • Highly Flammable

Air & Water Reactions

Highly flammable. Insoluble in water.

Fire Hazard

Behavior in Fire: Vapor is heavier than air and may travel considerable distance to a source of ignition and flash back. (USCG, 1999)

Health Hazard

Vapors cause headache and dizziness. Liquid irritates eyes and skin. If taken into lungs, causes severe coughing, distress, and rapidly developing pulmonary edema. If ingested, causes nausea, vomiting, cramps, headache, and coma. Can be fatal. Kidney and liver damage can occur. (USCG, 1999)

Reactivity Profile

P-XYLENE may react with oxidizing materials. (NTP, 1992). Acetic acid forms explosive mixtures with p-xylene and air (Shraer, B.I. 1970. Khim. Prom. 46(10):747-750.).

Belongs to the Following Reactive Group(s)

  • Hydrocarbons, Aromatic

Potentially Incompatible Absorbents

No information available.

Response Recommendations

What is this information?

The Response Recommendation fields include isolation and evacuation distances, as well as recommendations for firefighting, non-fire response, protective clothing, and first aid. The information in CAMEO Chemicals comes from a variety of data sources.

Isolation and Evacuation

Excerpt from ERG Guide 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 tank car or highway tank 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, 2024)


Fire Extinguishing Agents Not to Be Used: Water may be ineffective.

Fire Extinguishing Agents: Foam, dry chemical, or carbon dioxide (USCG, 1999)

Non-Fire Response

SMALL SPILLS AND LEAKAGE: If you should spill this chemical, use absorbent paper to pick up all liquid spill material. Your contaminated clothing and absorbent paper should be sealed in a vapor-tight plastic bag for eventual disposal. Solvent wash all contaminated surfaces with acetone followed by washing with a strong soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.

STORAGE PRECAUTIONS: You should store this material in a refrigerator. (NTP, 1992)

Protective Clothing

Excerpt from NIOSH Pocket Guide for p-XyleneP-XYLENE | CAMEO Chemicals | NOAA (10):

Skin: PREVENT SKIN CONTACT - Wear appropriate personal protective clothing to prevent skin contact.

Eyes: PREVENT EYE CONTACT - Wear appropriate eye protection to prevent eye contact.

Wash skin: WHEN CONTAMINATED - The worker should immediately wash the skin when it becomes contaminated.

Remove: WHEN WET (FLAMMABLE) - Work clothing that becomes wet should be immediately removed due to its flammability hazard (i.e., for liquids with a flash point <100°F).

Change: No recommendation is made specifying the need for the worker to change clothing after the workshift. (NIOSH, 2024)

DuPont Tychem® Suit Fabrics

No information available.

First Aid

EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

SKIN: IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.

INHALATION: IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used; if not available, use a level of protection greater than or equal to that advised under Protective Clothing.

INGESTION: DO NOT INDUCE VOMITING. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. Be prepared to transport the victim to a hospital if advised by a physician. If the victim is convulsing or unconscious, do not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport the victim to a hospital. (NTP, 1992)

Physical Properties

What is this information?

The Physical Property fields include properties such as vapor pressure and boiling point, as well as explosive limits and toxic exposure thresholds The information in CAMEO Chemicals comes from a variety of data sources.

Note: For Vapor Density and Specific Gravity, comparing the value to 1.0 can tell you if the chemical will likely sink/rise in air or sink/float in fresh water (respectively). Short phrases have been added to those values below as an aid. However, make sure to also consider the circ*mstances of a release. The Vapor Density comparisons are only valid when the gas escaping is at the same temperature as the surrounding air itself. If the chemical is escaping from a container where it was pressurized or refrigerated, it may first escape and behave as a heavy gas and sink in the air (even if it has a Vapor Density value less than 1). Also, the Specific Gravity comparisons are for fresh water (density 1.0 g/mL). If your spill is in salt water (density about 1.027 g/mL), you need to adjust the point of comparison. There are some chemicals that will sink in fresh water and float in salt water.

Chemical Formula:
  • C8H10

Flash Point: 81°F(NTP, 1992)

Lower Explosive Limit (LEL): 1.1 %(USCG, 1999)

Upper Explosive Limit (UEL): 7 %(USCG, 1999)

Autoignition Temperature: 984°F(USCG, 1999)

Melting Point: 55.9°F(NTP, 1992)

Vapor Pressure: 10 mmHgat 81.1°F(NTP, 1992)

Vapor Density (Relative to Air): 3.66 (NTP, 1992)- Heavier than air; will sink

Specific Gravity: 0.861 at 68°F(USCG, 1999)- Less dense than water; will float

Boiling Point: 280.9°Fat 760 mmHg(NTP, 1992)

Molecular Weight: 106.17 (NTP, 1992)

Water Solubility: Insoluble.(NTP, 1992)

Ionization Energy/Potential:8.44 eV(NIOSH, 2024)

IDLH: 900 ppm(NIOSH, 2024)

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
Xylene, m- (includes o- (95-47-6) and p- (106-42-3) isomers) 130 ppm 920 ppm 2500 ppm P-XYLENE | CAMEO Chemicals | NOAA (11) LEL = 11000 ppm

P-XYLENE | CAMEO Chemicals | NOAA (12) indicates value is 10-49% of LEL.

(DOE, 2024)

Regulatory Information

What is this information?

The Regulatory Information fields include information from the U.S. Environmental Protection Agency's Title III Consolidated List of Lists, the U.S. Cybersecurity and Infrastructure Security Agency's Chemical Facility Anti-Terrorism Standards, and the U.S. Occupational Safety and Health Administration's Process Safety Management of Highly Hazardous Chemicals Standard List (see more about these data sources).

EPA Consolidated List of Lists

Regulatory Name CAS Number/
313 Category Code
CAA 112(r)
Benzene, p-dimethyl- 106-42-3 100 pounds X U239
p-Xylene 106-42-3 100 pounds 313 U239
  • "X" indicates that this is a second name for an EPCRA section 313 chemical already included on this consolidated list. May also indicate that the same chemical with the same CAS number appears on another list with a different chemical name.

(EPA List of Lists, 2024)

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

What is this information?

This section provides a listing of alternate names for this chemical, including trade names and synonyms.

  • 1,4-XYLENE

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P-XYLENE | CAMEO Chemicals | NOAA (2024)
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