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名称:3,4-二羟基苯甲酸
 

纯度:99% 包装:25KG桶装
结构式 
               

CAS:           99-50-3
分子式:      C7H6O4
分子量:      154.12

中文名称:  3,4-二羟基苯甲酸
                   原儿茶酸 

英文名称:  3,4-Dihydroxybenzoic acid
                   3,4-dihydroxy-Benzoic acid
                   Protocatechuic acid 

性质描述:  白色至微棕色针状结晶。熔点约200℃(分解)。溶于热水、乙醇和乙醚,微溶于冷水,不溶于苯。在沸水中分解,并放出二氧化碳。3,4-二羟基苯甲酸水溶液遇三氯化铁呈绿色,遇碳酸氢钠呈暗红色。

用途:  用作染料、医药的中间体、分析试剂(检定铁)。

其它信息:

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



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