Omnistab UV 326

Omnistab UV 326 is chemically phenol, 2-(5-chloro-2H-benzotriazol-2-yl)-6-(1,1-dimethylethyl)-4-methyl. It acts as a UV absorber belonging to hydroxyphenyl benzotriazole class which imparts good light stability to a variety of polymers. Especially suited for polyolefins. It has a wide range of indirect food approvals in polyolefins. Omnistab UV 326 possesses low volatility and high resistance to thermal degradation making it particularly useful in polyolefin compounding and molding processes. Recommended concentrations are 0.1-0.5% for polypropylene and 0.1-0.4% for polyethylene.

Product composition

  • CAS number(s): 3896-11-5
  • Chemical name(s): 2-(2'Hydroxy-3'-Tert-Butyl-5'-Methylphenyl)-5-Chlorobenzotriazole
  • Molecular formula: C17H18CIN3O
  • Molecular weight (g/mol): 315.8
  • EU (EG-No (EINECS/ELINCS)): 223-445-4


  • Content (%): 99.00 min
  • Melting point/range (ºC): 138 min
  • Volatiles (%): 0.50 max
  • Ash (%): 0.10 max
  • Transmittance 460 nm (%): 93.00 min
  • Transmittance 500 nm (%): 96.00 min
  • Product form(s): Crystal powder, Powder, 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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