Product Identification
【Product Name】2,4-Dichlorobenzaldehyde
【Synonyms】2,4-二氯苯甲醛
【CAS】874-42-0
【Formula】C7H4Cl2O
【Molecular Weight】175.02
【EINECS】212-861-1
【Beilstein/Gmelin】471601
【Beilstein Reference】4-07-00-00575
【EC Class】irritant, dangerous for the environment

Physical and Chemical Properties
【Appearance】White crystalline solid or off-white chunky solid with black specks and a pungent odor.
【Solubility in water】Insoluble
【Melting Point】68-71℃
【Boiling Point】233℃
【Vapor Pressure】0.06 (25℃)
【Density】1.330 g/cm3 (20℃)
【Partition Coefficient】3.1
【Heat Of Vaporization】47.0 kJ/mol

First Aid Measures
【Ingestion】If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
【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 immediately.

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. Remove contaminated clothing and wash before reuse. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Use with adequate ventilation. Wash clothing before reuse.

Hazards Identification
【Ingestion】The toxicological properties of this substance have not been fully investigated. Causes gastrointestinal tract irritation.
【Inhalation】Causes respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.
【Skin】Causes skin irritation.
【Eyes】Causes eye irritation.
【EC Risk Phrase】R 36/37/38
【EC Safety Phrase】S 26 36
【UN (DOT)】3077

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 gloves to prevent skin exposure. Clothing: Wear appropriate 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.

Fire Fighting Measures
【Flash Point】100℃
【Autoignition】440℃
【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: Use agent most appropriate to extinguish fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
【Fire Potential】This compound is combustible.

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

Stability and Reactivity
【Disposal Code】3
【Stability】Stable at room temperature in closed containers under normal storage and handling conditions.
【Incompatibilities】Strong oxidizing agents, strong bases.
【Decomposition】Hydrogen chloride, carbon monoxide, carbon dioxide.

Transport Information
【UN Number】3077
【HS Code】2913 00 00