结构式
CAS: 89-05-4
分子式: C10H6O8
分子量: 254.15
中文名称: 1,2,4,5-苯四羧酸
苯均四酸
1,2,4,5-苯四甲酸
1,2,4,5-四羧酸苯
均苯四甲酸
英文名称: 1,2,4,5-Benzenetetracarboxylic acid
1,2,4,5-tetracarboxybenzene
pyromellitic acid
1,2,4,5-benzenetetracarboxylicacid
benzene-1,2,4,5-tetracarboxylic acid
性质描述: 白色至微黄色粉末状结晶。熔点276℃（无水物），242℃（带2分子结晶水），相对密度1.79。易溶于醇，微溶于乙醚和水,水溶性 1.5 g/100 mL (20℃) 。能升华。
质量指标：
外观 白色粉状结晶
含量 ≥99%
熔点 ≥260℃
酸值 ≥876
杂质 ≤1.5%
用途：用于合成聚酰亚胺、均苯四酸辛酯等，是生产消光固化剂的主要原料。
其它信息：
Product Identification
【Product Name】1,2,4,5-Benzenetetracarboxylic acid
【Synonyms】1,2,4,5-Tetracarboxybenzene 均苯四甲酸
【CAS】89-05-4
【Formula】C10H6O8
【Molecular Weight】254.15
【EINECS】201-879-5
【RTECS】DB9275000
【RTECS Class】Other
【Merck】12,8188
【Beilstein/Gmelin】1887659
【Beilstein Reference】4-09-00-03804
【EC Class】irritant
Physical and Chemical Properties
【Appearance】Solid.
【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
