原儿茶酸Product Identification
【Product Name】3,4-Dihydroxybenzoic acid；3,4-二羟基苯甲酸
【Synonyms】4-Carboxy-1,2-dihydroxybenzene
【CAS】99-50-3
【Formula】C7H6O4
【Molecular Weight】154.12
【EINECS】202-760-0
【RTECS】UL0560000
【RTECS Class】Mutagen
【Merck】12,8080
【Beilstein/Gmelin】1448841
【Beilstein Reference】4-10-00-01459

Physical ａnd Chemical Properties
【Appearance】Brown powder.
【Solubility in water】Very soluble
【Melting Point】202~204℃
【Boiling Point】125 - 135 (0.001 torr)
【Density】1.5415 g/cm3
【pKa/pKb】4.45 (pKa)
【Partition Coefficient】1.4
【Usage】Antioxidant.

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. DO NOT use mouth-to-mouth respiration.
【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.

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. Use with adequate ventilation. Minimize dust generation ａnd accumulation. Avoid contact with eyes, skin, ａnd clothing. Keep container tightly closed. Avoid ingestion ａnd inhalation.

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. May cause chemical conjunctivitis.
【Ingestion】May cause gastrointestinal irritation with nausea, vomiting ａnd diarrhea. The toxicological properties of this substance have not been fully investigated.
【EC Risk Phrase】R 36/37/38
【EC Safety Phrase】S 26 36

Exposure Controls/Personal Protection
【Personal Protection】Eyes: Wear appropriate protective eyeglasses or chemical safety goggles 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
【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.

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】Oxidizing agents.
【Stability】Stable at room temperature in closed containers under normal storage ａnd handling conditions.
【Decomposition】Carbon monoxide, irritating ａnd toxic fumes ａnd gases, carbon dioxide.

Transport Information
【HS Code】2918 29 90