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89-32-7

Basic Information
CAS No.: 89-32-7
Name: 1,2,4,5-Benzenetetracarboxylic anhydride
Article Data: 48
Cas Database
Molecular Structure:
Molecular Structure of 89-32-7 (1,2,4,5-Benzenetetracarboxylic anhydride)
Formula: C10H2O6
Molecular Weight: 218.122
Synonyms: 1,2,4,5-Benzenetetracarboxylic1,2:4,5-dianhydride (8CI);Pyromellitic 1,2:4,5-dianhydride (6CI);1,2,4,5-Benzenetetracarboxylic acid 1,2:4,5-dianhydride;1,2,4,5-Benzenetetracarboxylic acid dianhydride;1,2:4,5-Benzenetetracarboxylicdianhydride;NSC 4798;PMDA;PMDA-M;Pyromellitic acid anhydride;Pyromelliticacid dianhydride;Pyromellitic anhydride;Pyromellitic dianhydride;
EINECS: 201-898-9
Density: 1.885 g/cm3
Melting Point: 283-286 °C(lit.)
Boiling Point: 398.6 °C at 760 mmHg
Flash Point: 183.5 °C
Solubility: decomposes in water
Appearance: White powder
Hazard Symbols: HarmfulXn
Risk Codes: 41-42/43
Safety: 22-24-26-37/39
Transport Information: N/A
PSA: 94.56000
LogP: -0.50460
Synthetic route
89-05-4

1,2,4,5-benzenetetracarboxylic acid

89-32-7

Pyromellitic dianhydride

Conditions
ConditionsYield
With acetic anhydride for 3h; Reflux;97%
With 2,6-bis[(2,2,6,6-tetramethylpiperidin-1-yl)methyl]phenylboronic acid In propyl cyanide for 12h; Reflux;90%
2,6-bis[(2,2,6,6-tetramethylpiperidin-1-yl)methyl]phenylboronic acid In butryonitrile for 12h; Reflux;90%
95-93-2

1,2,4,5-tetramethylbenzene

89-32-7

Pyromellitic dianhydride

Conditions
ConditionsYield
at 450 - 565℃; Leiten im Gemisch mit Luft ueber Vanadium(V)-oxid;
With oxygen at 398℃; Gas phase;
39144-22-4

1,4-diethyl-2,5-dimethyl-benzene

89-32-7

Pyromellitic dianhydride

Conditions
ConditionsYield
at 450 - 565℃; Leiten im Gemisch mit Luft ueber Vanadium(V)-oxid;
517-60-2

benzenehexacarboxylic acid

89-32-7

Pyromellitic dianhydride

Conditions
ConditionsYield
durch trockne Destillation;
5999-20-2

4,5-dimethylphthalic anhydride

A

85-44-9

phthalic anhydride

B

19438-61-0

4-methylphthalic anhydride

C

4792-30-7

3-methylphthalic acid anhydride

D

89-32-7

Pyromellitic dianhydride

Conditions
ConditionsYield
With vanadia at 400℃; Product distribution; effect of temperature on gas-phase oxidation;
6051-66-7

2,5-dimethylterephthalic acid

A

108-31-6

maleic anhydride

B

89-32-7

Pyromellitic dianhydride

C

528-44-9

1,2,4-benzene tricarboxylic acid

D

552-30-7

trimellitic Anhydride

Conditions
ConditionsYield
With vanadia at 400℃; Product distribution; effect of temperature on gas-phase oxidation;
18190-63-1

2,4-dimethylisophthalic acid

A

89-32-7

Pyromellitic dianhydride

B

528-44-9

1,2,4-benzene tricarboxylic acid

C

552-30-7

trimellitic Anhydride

Conditions
ConditionsYield
With vanadia at 400℃; Product distribution; effect of temperature on gas-phase oxidation of methyl-substituted carboxylic acids and anhydrides;
benzenepentacarboxylic acid-dianhydride-(1.2;4.5)

benzenepentacarboxylic acid-dianhydride-(1.2;4.5)

89-32-7

Pyromellitic dianhydride

Conditions
ConditionsYield
at 270 - 300℃;
1585-40-6

benzenepentacarboxylic acid

A

124-38-9

carbon dioxide

B

89-32-7

Pyromellitic dianhydride

Conditions
ConditionsYield
at 270 - 300℃;
517-60-2

benzenehexacarboxylic acid

A

124-38-9

carbon dioxide

B

89-32-7

Pyromellitic dianhydride

Conditions
ConditionsYield
bei der trocknen Destillation;
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Chemistry

IUPAC Name: Furo[3,4-f][2]benzofuran-1,3,5,7-tetrone
Molecular Formula: C10H2O6
Molecular Weight: 218.119280 g/mol
Appearance: White powder
Melting Point: 283-286 °C(lit.)
Boiling Point: 397-400 °C(lit.)
Flash Point: 380 °C
Density: 1,68 g/cm3   
Water Solubility: Decomposes
Sensitive: Moisture Sensitive
Structure of 1,2,4,5-Benzenetetracarboxylic anhydride (CAS NO.89-32-7):
                          
Product Category of 1,2,4,5-Benzenetetracarboxylic anhydride (CAS NO.89-32-7): Intermediates of Dyes and Pigments;Benzene derivates;Functional Materials;Reagent for High-Performance Polymer Research

Uses

 1,2,4,5-Benzenetetracarboxylic anhydride (CASNO.89-32-7) is used for making polyimide resin, high temperature electrical insulating paint, PVC plasticizers, cross-linking agent of synthetic resin and curing agent of epoxy resin.

Toxicity Data With Reference

1.    

orl-rat LD50:2250 mg/kg

    GISAAA    Gigiena i Sanitariya. 51 (11)(1986),79.
2.    

ihl-rat LCLo:150 mg/m3/4H

    85GMAT    Toxicometric Parameters of Industrial Toxic Chemicals Under Single Exposure Izmerov, N.F., et al.,Moscow, USSR.: Centre of International Projects, GKNT,1982,105.
3.    

orl-mus LD50:2400 mg/kg

    TPKVAL    Toksikologiya Novykh Promyshlennykh Khimicheskikh Veshchestv. Toxicology of New Industrial Chemical Sciences. 14 (1975),125.
4.    

orl-gpg LD50:1595 mg/kg

    GISAAA    Gigiena i Sanitariya. 51 (11)(1986),79.

 1,2,4,5-Benzenetetracarboxylic anhydride (CAS NO.89-32-7) hasn't been listed as a carcinogen by NTP, IARC, ACGIH, or CA Prop 65. You can see actual entry in RTECS for complete information.

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

Poison by inhalation. Moderately toxic by ingestion. When heated to decomposition it emits acrid smoke and irritating vapors.
Hazard Codes: Xn 
Risk Statements: 41-42/43
41:Risk of serious damage to eyes
42/43:May cause sensitization by inhalation and skin contact   
Safety Statements: 22-24-26-37/39
22:Do not breathe dust   
24:Avoid contact with skin  
26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice 
37/39:Wear suitable gloves and eye/face protection 

Specification

 1,2,4,5-Benzenetetracarboxylic anhydride , its cas register number is 89-32-7. It also can be called Pyromellitic dianhydride ; Benzene-1,2,4,5-tetracarboxylic dianhydride ; PMDA ; and Pyromellitic acid dianhydride . It is hazardous, so the first aid measures and others should be known. Such as: When on the skin: first, should flush skin with plenty of water immediately for at least 15 minutes while removing contaminated clothing. Secondly, get medical aid. Or in the eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Then get medical aid soon. While, it's inhaled: Remove from exposure and move to fresh air immediately. Give artificial respiration while not breathing. When breathing is difficult, give oxygen. And as soon as to get medical aid. Then you have the ingesting of the product: Wash mouth out with water, and get medical aid immediately. Notes to physician: Treat supportively and symptomatically.
In addition, 1,2,4,5-Benzenetetracarboxylic anhydride (CAS NO.89-32-7) could be stable under normal temperatures and pressures. It is not exposured to moist air or water, and you must not take it with incompatible materials. And also prevent it to broken down into hazardous decomposition products: carbon monoxide, carbon dioxide.