Product Identification
【Product Name】Hydroquinone monophenyl ether
【Synonyms】4-(Phenoxy)phenol ；4-苯氧基苯酚
【CAS】831-82-3
【Formula】C12H10O2
【Molecular Weight】186.21
【EINECS】212-611-1
【Beilstein/Gmelin】2047182
【Beilstein Reference】4-06-00-05724

Physical and Chemical Properties
【Appearance】Beige crystals.
【Solubility in water】Insoluble.
【Melting Point】80~83℃
【Boiling Point】314℃
【Vapor Pressure】0.00026 (25℃)
【Partition Coefficient】3.75
【Heat Of Vaporization】57.7 kJ/mol

First Aid Measures
【Ingestion】If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately.
【Inhalation】Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
【Skin】Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Remove contaminated clothing and shoes.
【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 cool, dry place. Keep container closed when not in use.
【Handling】Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.

Hazards Identification
【Ingestion】See Inhalation.
【Inhalation】Causes irritation.
【Skin】Causes irritation.
【Eyes】Causes irritation.
【Hazards】During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion.
【EC Risk Phrase】R 22 36/37/38
【EC Safety Phrase】S 26 36/37/39
【UN (DOT)】2430

Exposure Controls/Personal Protection
【Personal Protection】Eyes: Wear chemical ggles. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
【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】141℃
【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.
【Fire Potential】Combustible material: may burn but does not ignite ily.

Accidental Release Measures
【Small spills/leaks】Clean up spills immediately, using the appropriate protective equipment.

Stability and Reactivity
【Disposal Code】3
【Incompatibilities】Avoid contact with strong oxidizing agents.
【Stability】Stable under normal temperatures and pressures.
【Decomposition】Irritating and toxic fumes and gases.
【Combustion Products】Fire may produce irritating, corrosive and/or toxic gases.

Transport Information
【UN Number】2430
【Hazard Class】8
【Packing Group】I; II; III
【HS Code】2909 50 90