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        純度:≥99% 包裝:25kg/袋


        CAS:    89-05-4
        分子式: C10H6O8
        分子量:  254.15

        中文名稱:  1,2,4,5-苯四羧酸

        英文名稱:  1,2,4,5-Benzenetetracarboxylic acid
                           pyromellitic acid
                           benzene-1,2,4,5-tetracarboxylic acid

        性質描述:  白色至微黃色粉末狀結晶。熔點276℃(無水物),242℃(帶2分子結晶水),相對密度1.79。易溶于醇,微溶于乙醚和水,水溶性  1.5 g/100 mL (20) 。能升華。

        外觀  白色粉狀結晶 
        含量  ≥99% 
        熔點  ≥260
        酸值  ≥876
        雜質  ≤1.5%



        Product Identification
        【Product Name】1,2,4,5-Benzenetetracarboxylic acid
        【Synonyms】1,2,4,5-Tetracarboxybenzene 均苯四甲酸
        【Molecular Weight】254.15
        【RTECS Class】Other
        【Beilstein Reference】4-09-00-03804
        【EC Class】irritant

        Physical and Chemical Properties
        【Solubility in water】Very soluble
        【Melting Point】272
        【Boiling Point】516
        【Vapor Pressure】1.5E-14 (25 C)
        【Density】1.79 g/cm3 (20 C)
        【pKa/pKb】1.87 (pKa)
        【Partition Coefficient】.26
        【Heat Of Combustion】-3255 kJ/mol

        First Aid Measures
        【Ingestion】If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately. Wash mouth out with water.
        【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.
        【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. Store in a tightly closed container.
        【Handling】Wash thoroughly after handling. Avoid contact with skin and eyes. Do not ingest or inhale. Use only in a chemical fume hood.

        Hazards Identification
        【Ingestion】The toxicological properties of this substance have not been fully investigated.
        【Inhalation】Causes respiratory tract irritation. The toxicological properties of this substance have not been fully investigated. Similar compounds have caused asthma, cough, wheezing, shortness of breath, anemia, weakness chills, fever, aching muscles and joints. May lead to restrictive lung disease.
        【Skin】Causes skin irritation. Causes redness and pain.
        【Eyes】Causes eye irritation. Causes redness and pain.
        【EC Risk Phrase】R 36
        【EC Safety Phrase】S 24/25

        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】Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.

        Fire Fighting Measures
        【Fire Fighting】Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.
        【Upper exp. limit】7.8
        【Lower exp. limit】1.2

        Accidental Release Measures
        【Small spills/leaks】Vacuum or sweep up material and place into a suitable disposal container. Avoid generating dusty conditions.

        Stability and Reactivity
        【Disposal Code】4
        【Stability】No data.
        【Incompatibilities】Strong oxidizing agents - strong bases.
        【Decomposition】Carbon monoxide, carbon dioxide.

        Transport Information
        【HS Code】2917 39 80


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