Product Identification
【Product Name】alpha-Resorcylic acid  　　3,5-二羟基苯甲酸
【Synonyms】3,5-Dihydroxybenzoic acid
【CAS】99-10-5
【Formula】C7H6O4
【Molecular Weight】154.12
【EINECS】202-730-7
【RTECS】VH3708000
【RTECS Class】Other
【Beilstein/Gmelin】2207864
【Beilstein Reference】4-10-00-01501

Physical and Chemical Properties
【Appearance】odorless off-white solid
【Solubility in water】Very soluble
【Melting Point】236~238℃
【pKa/pKb】3.96 (pKa)
【Partition Coefficient】1.39
【Vapor Density】5.3

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

Handling and Storage
【Storage】Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances.
【Handling】Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Avoid breathing dust, vapor, mist, or gas. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation. Use with adequate ventilation.

Hazards Identification
【Ingestion】Causes gastrointestinal tract irritation.
【Inhalation】Causes respiratory tract irritation.
【Skin】Causes mild skin irritation.
【Eyes】Causes eye irritation.
【Hazards】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 sp along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers.
【EC Safety Phrase】S 22 24/25
【UN (DOT)】1914

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 protective clothing to minimize contact with skin.
【Respirators】A NIOSH/MSHA approved or European Standard EN 149 air purifying respirator with an organic vapor cartridge or canister may be permissible under certain circumstances where airborne concentrations are expected.

Fire Fighting Measures
【Flash Point】>200℃
【Autoignition】>500℃
【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. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. Use agent most appropriate to extinguish fire.
【Fire Potential】HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.

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.
S

tability and Reactivity
【Disposal Code】4
【Stability】Stable under normal temperatures and pressures.
【Incompatibilities】Strong oxidizing agents - strong bases.
【Decomposition】Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.
【Combustion Products】Fire will produce irritating, corrosive and/or toxic gases.

Transport Information
【UN Number】1914
【Hazard Class】3
【Packing Group】III
【HS Code】2918 29 90