Pyromellitic Dianhydride
- Product Name
- Pyromellitic Dianhydride
- CAS No.
- 89-32-7
- Chemical Name
- Pyromellitic Dianhydride
- Synonyms
- PMDA;Pyromellitic anhydride;Dicarboxylic anhydride;1,2,4,5-BENZENETETRACARBOXYLIC ANHYDRIDE;1,2,4,5-Benzenetetracrboxylicdianhydride;1,2,4,5-BENZENETETRACARBOXYLIC DIANHYDRIDE;PyromeL;BDFtetron;Benzo[1,2-c;itic dianhydride
- CBNumber
- CB5267853
- Molecular Formula
- C10H2O6
- Formula Weight
- 218.12
- MOL File
- 89-32-7.mol
Pyromellitic Dianhydride Property
- Melting point:
- 283-286 °C(lit.)
- Boiling point:
- 397-400 °C(lit.)
- Density
- 1,68 g/cm3
- vapor pressure
- 0Pa at 25℃
- refractive index
- 1.6000 (estimate)
- Flash point:
- 380 °C
- solubility
- Soluble in dimethyl sulfoxide, acetone, chloroform, ethyl ether, n-hexane and benzene.
- form
- Fine Powder
- pka
- 5.45[at 20 ℃]
- color
- White to pale yellow
- Water Solubility
- decomposes
- Sensitive
- Moisture Sensitive
- BRN
- 213583
- InChIKey
- ANSXAPJVJOKRDJ-UHFFFAOYSA-N
- LogP
- -2.03 at 21.5℃
- CAS DataBase Reference
- 89-32-7(CAS DataBase Reference)
- NIST Chemistry Reference
- 1,2,4,5-Benzenetetracarboxylic anhydride(89-32-7)
- EPA Substance Registry System
- 1H,3H-Benzo[1,2-c:4,5-c']difuran-1,3,5,7-tetrone (89-32-7)
Safety
- Hazard Codes
- Xn
- Risk Statements
- 41-42/43
- Safety Statements
- 22-24-26-37/39
- WGK Germany
- 1
- RTECS
- DB9300000
- F
- 10-21
- TSCA
- Yes
- HS Code
- 29173980
- Hazardous Substances Data
- 89-32-7(Hazardous Substances Data)
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Danger
- Hazard statements
-
H317May cause an allergic skin reaction
H318Causes serious eye damage
H334May cause allergy or asthma symptoms or breathing difficulties if inhaled
- Precautionary statements
-
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P272Contaminated work clothing should not be allowed out of the workplace.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P284Wear respiratory protection.
P302+P352IF ON SKIN: wash with plenty of soap and water.
P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
N-Bromosuccinimide Price
- Product number
- 412287
- Product name
- Pyromellitic dianhydride
- Purity
- 97%
- Packaging
- 100g
- Price
- $67.3
- Updated
- 2024/03/01
- Product number
- 412287
- Product name
- Pyromellitic dianhydride
- Purity
- 97%
- Packaging
- 500g
- Price
- $220
- Updated
- 2024/03/01
- Product number
- B0040
- Product name
- Pyromellitic Dianhydride
- Purity
- >98.0%(T)
- Packaging
- 25g
- Price
- $18
- Updated
- 2024/03/01
- Product number
- B0040
- Product name
- Pyromellitic Dianhydride
- Purity
- >98.0%(T)
- Packaging
- 100g
- Price
- $35
- Updated
- 2024/03/01
- Product number
- 045788
- Product name
- Pyromellitic dianhydride, 98%
- Packaging
- 100g
- Price
- $62.65
- Updated
- 2024/03/01
Pyromellitic Dianhydride Chemical Properties,Usage,Production
Chemical Properties
White powder. Soluble in some organic solvents; hydrolyzes to the acid when exposed to moisture.
Uses
Pyromellitic dianhydride (PMDA) is employed as a curing agent for epoxy agent resins used for casting, laminating, the manufacture of moulding powders, adhesives and coatings.
Uses
Pyromellitic dianhydride is used as a monomer in the preparation of polyimide polymers such as kapton; thermoplastics such as polyesters, polyethers, plasticizers, and expoxy resins. It is involved in the preparation of high performance coatings due to its mechanical, thermal and oxidative stability properties. It acts as a curing agent for epoxy resins which find application in adhesives, coatings and molding powders. As an intermediate, it plays an important role in polyimide based materials like printed circuit boards, tape automated bonding and magnetic wire insulation.
Preparation
Pyromellitic Dianhydride is prepared by gas-phase oxidation of 1,2,4,5-tetramethylbenzene (or related tetrasubstituted benzene derivatives). An idealized equation is:
C6H2(CH3)4 + 6 O2 → C6H2(C2O3)2 + 6 H2O
In the laboratory, it can be prepared by dehydration of pyromellitic acid using acetic anhydride.
Application
Pyromellitic dianhydride (PMDA) has been used extensively as an important monomer in the preparation of a variety of thermoplastics such as polyesters, polycarbonates, polyethers polyethers, plasticizersplasticizers, expoxy resins, etc. Moreover, it is also useful in the preparation of high performance coatings that have been widely employed in many fields in our daily life beacuase of its excellent thermal, oxidative stability and excellent mechanical properties.
Pyromellitic dianhydride (PMDA) is one of several highly reactive acid anhydrides and used extensively in the production of thermoplastics and high-performance coatings. Anhydrides including PMDA are respiratory irritants and immediate-type sensitisers. Some anhydrides have been associated with occupational asthma. PMDA has also been related to occupational asthma.
General Description
Pyromellitic dianhydride (PMDA) is an acidic anhydride that can be used as a repair agent and as a chain extender in the formation of polyethylene terephthalate (PET) based chain extensions. It is mainly used in the production of thermoplastics and other coating applications.
Hazard
Skin irritant.
Flammability and Explosibility
Not classified
Purification Methods
Crystallise the dianhydride from ethyl methyl ketone or dioxane. Dry, and sublime it in vacuo.[Beilstein 19 H 196, 19/5 V 407.]
Pyromellitic Dianhydride Preparation Products And Raw materials
Raw materials
Preparation Products
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View Lastest Price from Pyromellitic Dianhydride manufacturers
- Product
- Pyromellitic dianhydride 89-32-7
- Price
- US $0.00/Kg/Drum
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- 500mt/year
- Release date
- 2021-11-08
- Product
- Pyromellitic Dianhydride 89-32-7
- Price
- US $10.00/KG
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- 10 mt
- Release date
- 2024-11-19
- Product
- Pyromellitic Dianhydride 89-32-7
- Price
- US $0.00/kg
- Min. Order
- 1kg
- Purity
- 99%
- Supply Ability
- 20tons
- Release date
- 2023-09-11