Home » Products » 3,3',4,4'-Benzophenonetetracarboxylic dianhydride CAS 2421-28-5

Share to:

3,3',4,4'-Benzophenonetetracarboxylic dianhydride CAS 2421-28-5

Product name: 3,3',4,4'-Benzophenonetetracarboxylic dianhydride
CAS：2421-28-5
MF： C17H6O7
MW： 322.23
EINECS:219-348-1

Product Description

Product name: 3,3',4,4'-Benzophenonetetracarboxylic dianhydride

CAS：2421-28-5

MF： C17H6O7

MW： 322.23

EINECS:219-348-1

Applicatiuon：

1. Polymeric monomer, used for synthesizing high-temperature resistant polymer materials.

BTDA is used as an intermediate in the industrial sector to manufacture plastic products or fine chemicals.

Specifications :

EST	Specification		TARGET VALUE
	Min	Max
Infrared spectrum	Conforms to Structure
Ignition residue	0%	2.00%	2.00%
Appearance	yellow powder,crystals and/or chunks
Melting point	223 °C	229 °C	229 °C
Purity(Morpholine Titration by HCl)	96%	104.50%	104.50%

公司信息

Quality Assurance

Full-Process Quality Control: From incoming raw material inspection to in-process monitoring and final outgoing checks, every batch is inspected at each production stage against strict acceptance standards.
Third-Party Certified & Tested: Our quality management system is certified to ISO 9001, and products are regularly tested by accredited laboratories (e.g. SGS, TÜV). Test reports are available on request.
100% Batch Traceability: Each batch carries a unique lot number that links raw material records, production parameters, and test results, enabling complete traceability from factory to final delivery.
Pre-Shipment Inspection: Every order passes a final pre-shipment inspection, with inspection photos and reports shared before dispatch.

FAQ From Customers

Q1: What is the minimum order quantity?

A: There is no quantity limit for the first sample or trial order. Just tell us the actual quantity you need.
Q2: How can I confirm that the quality meets the requirements?

A: Provide your specifications, and our technical team will check them or customize them for you; we can provide TDS, MSDS, and COA, and accept third-party testing.
Q3: How do you ensure stable quality?

A: We manufacture under an ISO 9001 quality system, test every batch before release, and retain samples for 24 months for traceability.
Q4: Do you provide samples?

A: Yes — Free samples are available; freight is at buyer's expense for express delivery.