UV Absorber BP2 CAS 131-55-5

UV Absorber BP2-benzophenone-2-cas-131-55-5

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Item	Product Specification
Product Name	UV Absorber BP-2
CAS Number	131-55-5
EC Number	205-028-9
Molecular Formula	C13H10O5
Molecular Weight	246.22 g/mol
UV Absorption Range	320–400 nm
Appearance	Pale greenish-yellow or light yellow
Standard Packaging	25 kg/drum

UV Absorber BP-2 (CAS 131-55-5) is a substituted benzophenone UV absorber. It is also identified as Benzophenone-2 and 2,2′,4,4′-tetrahydroxybenzophenone. The product absorbs ultraviolet radiation across the 320–400 nm range.

BP-2 is used in plastics, resins, coatings, synthetic rubber, photosensitive materials and selected textile applications. It helps reduce the UV energy reaching colorants, polymer chains and other light-sensitive components. Final performance depends on the material, addition level, processing conditions and exposure environment.

Why Source BP-2 from Unilong

Specification-Based Response
Send the required specification with your enquiry. The team will review the request against the current BP-2 product information before confirming an offer.
Application-Focused Communication
Share the material system, target performance and processing conditions with your enquiry. This helps the team respond with relevant product information.
Export Order Coordination
Packaging, labeling, destination and shipping-document requirements can be reviewed before the order is confirmed.

Item	Specification
Melting point	198-200 °C(lit.)
Boiling point	349.21°C (rough estimate)
Density	1.216
Acidity coefficient (pKa)	6.98±0.35(Predicted)
Refractive index	1.4825 (estimate)
LogP	3.091 (est)

Performance in UV Protection Systems

BP-2 absorbs incident ultraviolet energy before it reaches vulnerable components in the material. This can help limit UV-related color change and loss of appearance. The absorbed energy is released through molecular relaxation.

BP-2 should be assessed as part of the complete stabilization system. The final material remains the basis for performance testing and product approval.

Applications

Plastics and Resins
BP-2 can be evaluated in plastic and resin systems where UV exposure may cause discoloration or surface deterioration. Check dispersion, processing temperature and weathering performance in the finished material.

Coatings and Color Protection
In coatings, Benzophenone-2 can reduce the UV energy reaching dyes, pigments and other light-sensitive components. Evaluate solution clarity, color, curing conditions and weathering results before production.

Synthetic Rubber
BP-2 can be considered in light-stabilization systems for synthetic rubber. Confirm dispersion, blooming, color and mechanical performance after UV exposure.

Photosensitive and Textile Materials
BP-2 is also used in selected photosensitive materials and textile applications. Confirm fixation, color contribution and final UV performance under the intended process conditions.

Benzophenone-2 for UV protection in plastics, resins, coatings and selected specialty materials.

Benzophenone UV Absorber
320–400 nm Absorption Range
25 kg Drum Packaging
TDS Available for Review

Item	Information
Standard Packaging	25 kg/drum
Alternative Packaging	Available according to customer requirements

What product documents are available for BP-2?

The current TDS is available for technical review. An SDS and a lot-specific COA can also be provided upon request. Please contact us if your quality team requires additional product information.

Can I request a BP-2 sample before ordering?

Yes. A BP-2 sample can usually be arranged for laboratory testing, subject to availability. The sample quantity and courier charges will be confirmed based on your evaluation needs and delivery destination.

What are the MOQ and standard lead time?

The MOQ depends on the required quantity, packaging and current availability. Lead time is confirmed for each order after the quantity and delivery requirements are reviewed. Contact us for the latest supply information.

What information is needed for a quotation?

Please provide the required specification, estimated quantity, application, destination country, preferred packaging and delivery terms. These details help us prepare an accurate BP-2 quotation and shipping proposal.

Can Unilong support alternative packaging or export documents?

Alternative packaging can be discussed based on order quantity and shipping requirements. Standard documents may include the commercial invoice, packing list, COA and SDS. Additional documents are subject to availability and destination requirements.