Omnistab UV BP 12 (UV 531)

Omnistab UV BP 12 is a benzophenone grade. Acts as a UV absorber. Imparts good light stability when used in combination with a hindered amine light stabilizer (HALS). Shows good compatibility with polyolefins and plasticized PVC. Protects a number of other polymers against degradation caused by light exposure such as plasticized PVC and rubbers. It can also be used in combination with antioxidants, phosphites and other light stabilizers. Suitable for low density and linear low density polyethylene as well as ethylene-vinyl acetate copolymers for agricultural films. It can be used as well as a UV barrier to protect the contents of packages for both industrial and consumer applications. Particularly suitable for thick films, typically > 100 μm and thick sections. Its low vapor pressure prevents losses during processing. Low migration rates reduce the risk of blooming. Also, in combination with HALS, Omnistab UV BP 12 can be used in high density polyethylene molded articles, e. g. in crates. Recommended dosage is 0.10-0.5% for PE and 0.15-0.5% for LLDPE, LDPE and EVA.

Product composition

  • CAS number(s): 1843-05-6
  • Chemical name(s): 2-Hydroxy-4-n-octoxybenzophenone
  • Molecular formula: C21H 26O3
  • Molecular weight (g/mol): 326.43
  • EU (EG-No (EINECS/ELINCS)): 217-421-2


  • Content (%): 99.00 min
  • Melting point/range (ºC): 47 - 49
  • Transmittance 460 nm (%): 95.00 min
  • Transmittance 500 nm (%): 97.00 min
  • Ash (%): 0.10 max
  • Product form(s): Crystal powder, Powder, Flake, Granular
  • Packaging option(s): Carton


In 2007 we decided to start ICG Specialty Chemicals selling specialty chemicals and additives under the tradename Omnistab.



Partners in Chemicals expanded its business in Middle East by setting up a branch office in Dubai in 2014.

Our Dubai office gives direct access to the Middle East and Africa. Having warehousing facility in the Dubai Free Zone makes it much easier to import, stock and re-export material to different destinations around the globe.




To serve the American market we have set up our Chicago branch office in 2009.



Deltachem (Qingdao) Co. Ltd. has been established in 2012 but general manager Mr. Mike Zou is already since 2007 a business partner for the Omnistab range.

Deltachem is the partner of Choice for Partners in Chemicals.

Besides being responsible for sourcing new products, supplychain and quality controle Deltachem is also managing the production facilities and handles the technical support.

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