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2421-28-5

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Product FOB Price Min.Order Supply Ability Supplier
3,3',4,4'-Benzophenonetetracarboxylic dianhydride TOP1 supplier
Cas No: 2421-28-5
No Data 100 Gram 1 Metric Ton/Day Hangzhou Dayangchem Co., Ltd. Contact Supplier
3,3',4,4'-Benzophenonetetracarboxylic dianhydride(BTDA)
Cas No: 2421-28-5
No Data No Data Metric Ton/Day Henan DaKen Chemical CO.,LTD. Contact Supplier
2421-28-5 1,3-Isobenzofurandione,5,5'-carbonylbis-
Cas No: 2421-28-5
USD $ 2.0-2.0 / Kilogram 1 Kilogram 100 Metric Ton/Year Hebei yanxi chemical co.,LTD. Contact Supplier
BTDA -- 3,3',4,4'-Benzophenonetetracarboxylic dianhydride CAS 2421-28-5 In stock
Cas No: 2421-28-5
USD $ 1.0-1.0 / Metric Ton 1 Metric Ton 5 Metric Ton/Day Chemwill Asia Co., Ltd. Contact Supplier
3,3',4,4'-Benzophenonetetracarboxylic Dianhydride
Cas No: 2421-28-5
No Data 1 Kilogram 20 Metric Ton/Month Henan Allgreen Chemical Co.,Ltd Contact Supplier
2421-28-5 C17H6O7 3,3',4,4'-Benzophenonetetracarboxylic dianhydride
Cas No: 2421-28-5
No Data 10 Gram 1 Kilogram/Day HENAN SUNLAKE ENTERPRISE CORPORATION Contact Supplier
High quality/Best price/In stock 3,3',4,4'-Benzophenonetetracarboxylic dianhydride
Cas No: 2421-28-5
USD $ 1.0-1.0 / Kilogram 1 Kilogram 200 Metric Ton/Day Crovell Biotech (Hebei) Co., Ltd. Contact Supplier
TIANFU-CHEM CAS NO.2421-28-5 3,3',4,4'-Benzophenonetetracarboxylic dianhydride
Cas No: 2421-28-5
No Data 1 Kilogram 1 Metric Ton/Day Henan Tianfu Chemical Co., Ltd. Contact Supplier
3,3',4,4'-Benzophenonetetracarboxylic dianhydride CAS NO 2421-28-5
Cas No: 2421-28-5
No Data 1 Kilogram 20000 Kilogram/Day Hubei XinRunde Chemical Co., Ltd Contact Supplier
3,3',4,4'-Benzophenonetetracarboxylic dianhydride / LIDE PHARMA- Factory supply / Best price
Cas No: 2421-28-5
No Data 1 Kilogram 1000 Kilogram/Day LIDE PHARMACEUTICALS LIMITED Contact Supplier

2421-28-5 Usage

Purification Methods

The main impurity is the free acid formed by hydrolysis (check for OH bands in the IR). This can be converted to the dianhydride by treating with Ac2O (molar ratio of 4 to 1 of acid), heating at 110-120o for 1.5 to 2hours, cooling to 0—5o and collecting the dianhydride. This is then dissolved in hot dioxane or Me2CO, filtered and cooled to 10—15o. The moisture sensitive solid is collected and dried at 120—130o in vacuo. It has been sublimed at high vacuum. [Faberov et al. J Org Chem USSR 4 153 (English translation) 1968.]

Chemical Properties

white crystall powder

Uses

Used in the synthesis of polyimides.

Uses

BTDA is important monomer of polyimide, and used for production of polyimide material. The material has high temperature resistance, low temperature resistance, corrosion resistance, radiation resistance, insulation, shock resistance, excellent performance. Can be made into structure parts, laminates, films, adhesives, coatings, insulation materials and reinforcing material, etc., can be widely used in the field of aerospace, electrical / electronics, shipbuilding, automobile, precision machinery.

2421-28-5 Well-known Company Product Price

Brand (Code)Product description CAS number Packaging Price Detail
Aldrich (B9750)  Benzophenone-3,3′,4,4′-tetracarboxylicdianhydride  98% 2421-28-5 B9750-5KG 6,552.00CNY Detail
Aldrich (B9750)  Benzophenone-3,3′,4,4′-tetracarboxylicdianhydride  98% 2421-28-5 B9750-500G 1,173.51CNY Detail
Aldrich (B9750)  Benzophenone-3,3′,4,4′-tetracarboxylicdianhydride  98% 2421-28-5 B9750-100G 425.88CNY Detail
Alfa Aesar (A16529)  3,3',4,4'-Benzophenonetetracarboxylic dianhydride, 97+%    2421-28-5 2.5kg 2820.0CNY Detail
Alfa Aesar (A16529)  3,3',4,4'-Benzophenonetetracarboxylic dianhydride, 97+%    2421-28-5 500g 861.0CNY Detail
Alfa Aesar (A16529)  3,3',4,4'-Benzophenonetetracarboxylic dianhydride, 97+%    2421-28-5 100g 319.0CNY Detail
TCI America (B4260)  3,3',4,4'-Benzophenonetetracarboxylic Dianhydride (purified by sublimation)  >98.0%(GC) 2421-28-5 25g 4,990.00CNY Detail
TCI America (B4260)  3,3',4,4'-Benzophenonetetracarboxylic Dianhydride (purified by sublimation)  >98.0%(GC) 2421-28-5 5g 1,450.00CNY Detail
TCI America (B0948)  3,3',4,4'-Benzophenonetetracarboxylic Dianhydride  >96.0%(T) 2421-28-5 500g 2,150.00CNY Detail
TCI America (B0948)  3,3',4,4'-Benzophenonetetracarboxylic Dianhydride  >96.0%(T) 2421-28-5 100g 690.00CNY Detail
TCI America (B0948)  3,3',4,4'-Benzophenonetetracarboxylic Dianhydride  >96.0%(T) 2421-28-5 25g 260.00CNY Detail

2421-28-5SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 13, 2017

Revision Date: Aug 13, 2017

1.Identification

1.1 GHS Product identifier

Product name 5-(1,3-dioxo-2-benzofuran-5-carbonyl)-2-benzofuran-1,3-dione

1.2 Other means of identification

Product number -
Other names benzophenone-3,3',4,4'-tetracarboxylic acid dianhydride

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Intermediates
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:2421-28-5 SDS

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