Bisphenol a diethyl dianhydride (BPADA) CAS 38103-06-9

Name: Bisphenol a diethyl dianhydride (BPADA) CAS 38103-06-9
Brand: Aure Chemical
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Synonyms: 4,4'-Bisphenol A dianhydride; 4,4'-Bisphenol A diphthalic anhydride; Ultem dianhydride; 4,4'-(4,4'-Isopropylidenediphenoxy)bis(phthalic anhydride); 4,4'-(4,4'-Isopropylidenediphenoxy)diphthalic anhydride; 2,2-Bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride

Shandong Aure Chemical Co., Ltd. is one of the leading suppliers of BPADA in China and also one of the manufacturers of this product.

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Product Details

Aure Chemical Delivers Excellence in BPADA

Bisphenol A dianhydride (BPADA, CAS 38103-06-9) is a bisphenol-based aromatic dianhydride widely used as a monomer in the synthesis of high-performance and optically transparent polyimides. Owing to its bulky isopropylidene structure, BPADA provides excellent solubility, suppressed charge-transfer interactions, balanced thermal stability, and low dielectric characteristics, making it particularly suitable for processing-oriented and flexible polyimide systems.

Basic Information of BPADA

Product Name	Bisphenol A dianhydride
Abbreviation	BPADA
CAS Number	38103-06-9
Molecular Formula	C31H20O8
Molecular Weight	520.49 g/mol
Appearance	White to light yellow powder or crystal
Purity	≥99%
Package	1kg/bottle, 20kg/drum, or customized
Molecular Structure

Key Properties

Bulky bisphenol A backbone disrupts molecular packing and suppresses charge-transfer complexes, enabling high optical transparency.
Excellent solubility and broad processing window for poly(amic acid) solutions compared with rigid aromatic dianhydrides.
Moderate glass transition temperature (Tg ~200°C) suitable for flexible and optoelectronic polymer systems.
Low dielectric constant and good electrical insulation performance in derived polyimides.
Compatible with a wide range of aromatic and aliphatic diamines for tuning mechanical and optical properties.

Application Positioning of BPADA

Primary Positioning – Processing-Oriented Polyimide Systems:
BPADA is primarily positioned for processing-oriented polyimide formulations, where solubility, film-forming ability, and controllable viscosity are critical. Its bulky non-planar structure enables easier polymer processing compared with highly rigid dianhydrides such as BPDA or PMDA.

Secondary Positioning – Flexible Films, Coatings, and Adhesives:
BPADA is widely applied in flexible polyimide films, coatings, and adhesive systems , where mechanical compliance, optical clarity, and dimensional stability are required.

Key Applications of BPADA

Processing-Oriented Polyimides:
Used as a solubility-enhancing dianhydride for polyimide systems requiring wide processing windows, controlled molecular weight growth, and uniform film or coating formation.

Flexible Films, Coatings, and Adhesives:
Applied in flexible substrates, protective coatings, and high-performance adhesive formulations where toughness, transparency, and moderate heat resistance are essential.

Optical and Display-Related Polyimides:
Serves as a functional monomer in colorless or low-yellowing polyimides for flexible displays, wearable electronics, and optoelectronic components.

Electronics and Dielectric Materials:
Utilized as a dielectric property modifier in electronic-grade polyimides, particularly where low dielectric constant and processability are prioritized over extreme thermal endurance.

Functional and Research-Oriented Applications:
Explored in membrane materials, specialty coatings, and advanced functional polymers benefiting from chemical inertness and structural stability.

Detailed COA / TDS / MSDS are available upon request. Please Contact Us for more information.

Packaging, Transportation & Storage

Aure Chemical ensures that all products are handled in compliance with international safety and quality standards. Each product’s SDS should be consulted for detailed requirements.

Packaging

We use certified UN-rated containers suitable for each chemical type — including steel drums, HDPE drums, IBCs, and ISO tank containers for bulk liquids. All packages are tested for integrity and labeled per IMDG / IATA / ADR standards.

Transportation

Shipments comply with IMDG, IATA, and ADR codes to ensure safe and lawful movement by sea, air, or land. Accompanying documents include SDS, Dangerous Goods Declarations, and COAs.

Storage

Products should be stored in well-ventilated, dry areas, away from heat and incompatible substances. Follow ISO 9001 / 14001 principles for safety, labeling, and periodic inspection.

For detailed handling or customized packaging inquiries, please contact us.

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