Basic Info:

  • Chemical Synonym(s): benzophenone-12,octabenzone; BP-12; (2-Hydroxy-4-(octyloxy)phenyl)(phenyl)methanone; 4-n-octoxy-2-hydroxybenzophenone; UV-531; 2-Hydroxy-4-n-octyloxybenzophenone; uva1; Methanone, [2-hydroxy-4-(octyloxy)phenyl]phenyl-;
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  • CAS Number: 1843-05-6
  • Chemical Formula:


  • MSDS: Download


Melting point
47-49 °C(lit.)
Boiling point
424.46°C (rough estimate)
Refractive index
1.6000 (estimate)
Flash Point
Vapor Pressure
5.25E-09mmHg at 25°C
Appearance & Physical State
Light Yellow Crystal
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We help you source SUNSORB® 531 in China

Our Advantages:

China currently plays a very important role in the world market for plastic additives, with 168, 1010, DSTDP, DLTDP, 977 and 365 being the most produced products in the world.
The price of plastic additives varies significantly with oil, while the cost correlation between antioxidants and palm oil is high.
Since 2020, the number of black swan events in the world has increased, resulting in dramatic changes in raw material prices.
Companies such as UPP, SONGWON, PMC, LG, etc. have been alerted by us in time and have avoided many losses.

We have a 20+ year track record of working with suppliers in China and rating reports on them, and we keep our suppliers updated with the latest news so our customers can get the latest supplier reports. We know the market well and have early warning notifications on upstream raw material prices to help you build a stable supply chain.

When selecting suppliers, our procurement specialists will audit the qualification of suppliers, conduct thorough investigations such as field visits and sample testing, and make ratings to ensure the authenticity and legality of supplier information.

We have a long-term stable cooperation with GLP laboratories, encounter customer test results and supplier test results do not match the situation, we will commission a third party to test to ensure the accuracy, authenticity and reliability of the experimental results. In this way, we can effectively control the product quality problems.

We have a long-term cooperative warehouse and can follow up packaging and labeling according to safety regulations and customer requirements. In order to effectively prevent damage to the goods in transit, we have prepared various reinforcement measures and packaging solutions.

We have a number of international freight companies with whom we have long-standing cooperation, and we can choose several route options according to the customer's requirements. For more difficult or urgent orders, we will prepare several alternative solutions to ensure safe and timely delivery.


We promise to immediately and unconditionally exchange or return the goods if they have quality problems. Our employees who deal with after-sales issues have many years of international work experience and are familiar with various processes in multinational work, so they can communicate and deal with after-sales issues without any obstacles.

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SUNSORB® 531 is a low molecular weight nonionic surfactant with high transparency, low temperature, and high molecular weight.

It is of increased activity and good compatibility, not easy to precipitate and separate, and can be readily adsorbed on plastics and synthetic fibers.

Specifically, it has excellent features such as no odor, no pollution, non-irritating, and it can be used as a reinforcing agent and emulsifier for waterproofing agents and nail polish and is also more suitable for irregular-shaped items.

UV-531 can be applied to many fields, such as PP, PE, PP/PE, bag and film manufacturing; rubber and plastics recycling processing; leather and shoes manufacturing; printing and dyeing; oil and gas production drilling; and pesticide and chemical manufacture.


SUNSORB® 531 works effectively as an antistatic agent, anti-oxidant, anti-yellowing agent, and UV light stabilizer. 

SUNSORB® 531 can be applied in both coating and printing ink as an anti-oxidant and anti-yellowing agent, as well as a UV light stabilizer.

SUNSORB® 531 is a kind of water-dispersible organic UV stabilizer, which is widely used in the polymerization field. It is highly effective for crosslinking and distributing polyvinyl chloride(PVC) and has good compatibility with the polymer. UV-531 can suppress yellowing and fading and inhibit the degradation of color and mechanical properties under sunlight and the influence of the ozone. 

 It is an oil-soluble antistatic agent produced by adding an ultraviolet absorber UV-531 to isopropyl alcohol, acetone, ethyl acetate, or toluene. It has good antistatic performance, low volatility, good stability, etc. 

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