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均苯四甲酸酐

均苯四甲酸酐用途

用途1：用于制造聚酰亚胺树脂，后者用作耐高温电气绝缘漆的原料。亦用以制取环氧树脂固化剂和增塑剂、脲醛树脂稳定剂、酞菁蓝染料、缓蚀剂、瞬间粘结剂、电子摄影调色剂等。

用途2：均苯四甲酸二酐及其衍生物具有广泛的用途。PMDA主要用作环氧树脂固化剂、聚酰亚胺原料，聚酯树脂的交联产均苯型聚醚亚胺树脂，这是一种可在2600C连续长期使用的耐高温工程材料。

用途3：用于制造聚酰亚胺薄膜、聚酰亚胺树脂，粉末涂料消光剂，高级电气绝缘材料。

用途4：用于制造聚酰亚胺耐热工程塑料和绝缘薄膜的主要原料;可用作环氧树脂固化剂、稳定剂及染料等的合成原料。

用途5：:于制聚酰亚胺树脂、耐高温电绝缘漆、PVC增塑剂、合成树脂交联剂和环氧树脂固化剂，也用于制酞菁蓝染料等。

均苯四甲酸酐名称

[ CAS 号 ]:
89-32-7

[ 中文名 ]:
均苯四甲酸二酐

[ 英文名 ]:
PMDA

[中文别名 ]:

[英文别名 ]:

pyromelliticacidanhydride
benzene-1,2,4,5-tetracarboxylic dianhydride
Pyromellitic dianhydride
pyromellithic dianhydride
1,2,4,5-benzenetetracarboxylic dianhydride
1H,3H-Furo[3,4-f][2]benzofuran-1,3,5,7-tetrone
EINECS 201-898-9
BDFtetron
Piromellitic dianhydride
Pyromellitic dianhyd

均苯四甲酸酐物理化学性质

[ 密度 ]:
1.9±0.1 g/cm3

[ 沸点 ]:
398.6±15.0 °C at 760 mmHg

[ 熔点 ]:
283-286 °C(lit.)

[ 分子式 ]:
C₁₀H₂O₆

[ 分子量 ]:
218.119

[ 闪点 ]:
183.5±20.4 °C

[ 精确质量 ]:
217.985138

[ PSA ]:
94.56000

[ LogP ]:
0.98

[ 外观性状 ]:
白色粉末

[ 蒸汽压 ]:
0.0±0.9 mmHg at 25°C

[ 折射率 ]:
1.708

[ 储存条件 ]:
库房通风低温干燥,与氧化剂分开存放

[ 水溶解性 ]:
decomposes

均苯四甲酸酐MSDS

均苯四甲酸酐毒性和生态

CHEMICAL IDENTIFICATION

RTECS NUMBER :: DB9300000

CAS REGISTRY NUMBER :: 89-32-7

LAST UPDATED :: 199712

DATA ITEMS CITED :: 9

MOLECULAR FORMULA :: C10-H2-O6

MOLECULAR WEIGHT :: 218.12

WISWESSER LINE NOTATION :: T C565 DVOV JVOVJ

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 2250 mg/kg

TOXIC EFFECTS :: Behavioral - excitement Behavioral - ataxia Lungs, Thorax, or Respiration - dyspnea

REFERENCE :: GISAAA Gigiena i Sanitariya. For English translation, see HYSAAV. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1- 1936- Volume(issue)/page/year: 51(11),79,1986

TYPE OF TEST :: LCLo - Lowest published lethal concentration

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 150 mg/m3/4H

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: 85GMAT "Toxicometric Parameters of Industrial Toxic Chemicals Under Single Exposure," Izmerov, N.F., et al., Moscow, Centre of International Projects, GKNT, 1982 Volume(issue)/page/year: -,105,1982

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 2400 mg/kg

TOXIC EFFECTS :: Behavioral - somnolence (general depressed activity) Behavioral - changes in motor activity (specific assay) Behavioral - muscle weakness

REFERENCE :: TPKVAL Toksikologiya Novykh Promyshlennykh Khimicheskikh Veshchestv. Toxicology of New Industrial Chemical Substances. For English translation, see TNICS*. (Izdatel'stvo Meditsina, Moscow, USSR) No.1- 1961- Volume(issue)/page/year: 14,125,1975

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - guinea pig

DOSE/DURATION :: 1595 mg/kg

TOXIC EFFECTS :: Behavioral - excitement Behavioral - ataxia Lungs, Thorax, or Respiration - dyspnea

REFERENCE :: GISAAA Gigiena i Sanitariya. For English translation, see HYSAAV. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1- 1936- Volume(issue)/page/year: 51(11),79,1986 ** OTHER MULTIPLE DOSE TOXICITY DATA **

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 1320 mg/kg/30D-I

TOXIC EFFECTS :: Blood - changes in serum composition (e.g. TP, bilirubin, cholesterol) Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - true cholinesterase Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - phosphatases

REFERENCE :: GISAAA Gigiena i Sanitariya. For English translation, see HYSAAV. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1- 1936- Volume(issue)/page/year: 51(11),79,1986 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - 84105 No. of Facilities: 62 (estimated) No. of Industries: 6 No. of Occupations: 9 No. of Employees: 721 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - 84105 No. of Facilities: 64 (estimated) No. of Industries: 4 No. of Occupations: 3 No. of Employees: 1926 (estimated) No. of Female Employees: 728 (estimated)

均苯四甲酸酐安全信息

[ 符号 ]:

GHS05, GHS08

[ 信号词 ]:
Danger

[ 危害声明 ]:
H317-H318-H334

[ 警示性声明 ]:
P261-P280-P284-P304 + P340-P305 + P351 + P338 + P310

[ 个人防护装备 ]:
dust mask type N95 (US);Eyeshields;Faceshields;Gloves

[ 危害码 (欧洲) ]:
Xn:Harmful;

[ 风险声明 (欧洲) ]:
R41;R42/43

[ 安全声明 (欧洲) ]:
S22-S24-S26-S37/39

[ 危险品运输编码 ]:
1760.0

[ WGK德国 ]:
1

[ RTECS号 ]:
DB9300000

[ 危险类别 ]:
8.0

[ 海关编码 ]:
2917399090

均苯四甲酸酐合成路线

均苯四甲酸酐上下游产品

均苯四甲酸酐上游产品

均苯四甲酸酐下游产品

均苯四甲酸酐制备

可以有多种制法。采用的原料可以是二甲苯、三甲苯、四甲苯或蒽。氧化的方法有液相法和气相法等。1.均四甲苯气相氧化此法特点是工艺简单，可省去脱水成酐工序，除空气外不用其他氧化剂（如硝酸、高锰酸、铬酸等），也不需液相所必需的催化剂分离工序，并可连续生产，易于实现自动化操作，是国外发展的主要方法。

所用的原料也可以从1,2,4-三甲苯出发，在催化剂存在下，与丙烯烷基化生成1,2,4-三甲基-5-丙基苯，再以气相空气催化氧化得到均苯四甲酸二酐。

2.由二甲苯（对二甲苯或间二甲苯）经氯甲基化、氧化、环化而得。工业品均苯四甲酸二酐为白色至淡黄绿色结晶，一级品熔点284-287℃，二级品熔点283.5-287℃。由1,2,4-三甲苯用氧化法生产时，每吨产品消耗1,2,4-三甲苯3000kg、丙烯1200kg。

3、一氧化碳法以偏三甲苯和一氧化碳反应制得高纯度的中间体芳香醛2，4，5-三甲基苯甲醛，然后氧化得均苯四甲酸，最后经脱水生成PM-DA。该法采用羰基化新工艺，副反应少，产品纯度高，收率高，选择性强，对设备腐蚀性小，符合环保要求，并且使用一套装置可切换生产偏听偏苯三酸酐和PMDA两种产品，生产成本较低。

均苯四甲酸酐海关

[ 海关编码 ]: 2932190090

[ 中文概述 ]:
2932190090 其他结构上有非稠合呋喃环化合物. 增值税率:17.0% 退税率:9.0% 监管条件:无最惠国关税:6.5% 普通关税:20.0%

[ 申报要素 ]: 品名, 成分含量, 用途

[ Summary ]:
2932190090 other compounds containing an unfused furan ring (whether or not hydrogenated) in the structure VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:20.0%

均苯四甲酸酐文献

Covalent molecular assembly of oligoimide ultrathin films in supercritical and liquid solvent media.

Langmuir 21(17) , 7812-22, (2005)

An ultrathin film of oligoimide has been fabricated on amine-modified substrates of silicon and quartz through alternate layer-by-layer (LBL) assembly of pyromellitic dianhydride (PMDA) and diaminodip...

Novel zwitterionic inorganic-organic hybrids: synthesis of hybrid adsorbents and their applications for Cu2+ removal.

J. Hazard. Mater. 186(2-3) , 1335-42, (2011)

A series of zwitterionic hybrid adsorbents were prepared via the ring-opening polymerization of pyromellitic acid dianhydride (PMDA) and N-[3-(trimethoxysilyl)propyl] ethylene diamine (TMSPEDA), and a...

NTCDA-TTF first axial fusion: emergent panchromatic, NIR optical, multi-state redox and high optical contrast photooxidation.

Chem. Commun. (Camb.) 48(52) , 6475-7, (2012)

The first synthetic entry into axially fused NTCDA/PMDA-TTF multipolar molecules demonstrates a high optical contrast photooxidation, panchromism, low HOMO-LUMO gap, generation of a stable radical cat...

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