Product Identification
【Product Name】alpha,alpha'-Dichloro-p-xylene
【Synonyms】p-Xylylene dichloride 对二氯苄
【CAS】623-25-6
【Formula】C8H8Cl2
【Molecular Weight】175.06
【EINECS】210-782-7
【RTECS】ZE4100000
【RTECS Class】Mutagen; Primary Irritant
【Beilstein/Gmelin】774706
【Beilstein Reference】4-05-00-00967
【EC Class】harmful, irritant

Physical and Chemical Properties
【Appearance】White flakes.
【Solubility in water】Decomposes
【Melting Point】100
【Boiling Point】254
【Vapor Pressure】0.05 (25 C)
【Density】1.432 g/cm3
【Partition Coefficient】2.76
【Heat Of Vaporization】46.0 kJ/mol
【Refractive Index】1.5002 (20 C)

First Aid Measures
【Ingestion】Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
【Inhalation】Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
【Skin】Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
【Eyes】Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid. Do NOT allow victim to rub or keep eyes closed.

Handling and Storage
【Storage】Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
【Handling】Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Wash clothing before reuse.

Hazards Identification
【Inhalation】Causes respiratory tract irritation. The toxicological properties of this substance have not been fully investigated. Can produce delayed pulmonary edema.
【Skin】Causes skin irritation.
【Eyes】Causes eye irritation. Lachrymator. May cause chemical conjunctivitis.
【Ingestion】May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May be harmful if swallowed.
【Hazards】Contact with metals may evolve flammable hydrogen gas.
【EC Risk Phrase】R 21/22 34 36/37
【EC Safety Phrase】S 26 36/37/39 45
【UN (DOT)】2811

Exposure Controls/Personal Protection
【Personal Protection】Eyes: Wear appropriate protective eyeglasses or chemical safety ggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
【Respirators】A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
【Exposure Effects】Effects may be delayed.

Fire Fighting Measures
【Flash Point】119
【Fire Fighting】Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: Do NOT use water directly on fire. Use foam, dry chemical, or carbon dioxide. Use agent most appropriate to extinguish fire.
【Fire Potential】Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.

Accidental Release Measures
【Small spills/leaks】Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Provide ventilation.

Stability and Reactivity
【Incompatibilities】Bases, moisture, oxidizing agents.
【Stability】Stable at room temperature in closed containers under normal storage and handling conditions.
【Decomposition】Hydrogen chloride, carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.
【Combustion Products】Fire may produce irritating, corrosive and/or toxic gases.

Transport Information
【UN Number】2811
【Hazard Class】6.1
【Packing Group】I; II; III
【HS Code】2903 69 90