Omnistab UV 234

Omnistab UV 234 is chemically phenol, 2-(2H-benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl) grade. Acts as a UV absorber. It is a high molecular weight product belonging to hydroxyphenyl benzotriazole class. Imparts excellent light stability to a variety of polymers. Features low volatility, exceptional light absorbing characteristics and good compatibility in various substrates.
This makes the product particularly suitable for applications characterized by high surface area, such as films and fibers. Suitable for polycarbonates, polyalkylene terephthalates, polyacetals, polyamides, polyphenylene sulfide, polyphenylene oxide, aromatic copolymers, thermoplastic polyurethane and polyurethane fibers, as well as for polyvinylchloride, styrene homo- and copolymers. Applications include molded articles, films, sheets and fibers. Use levels of Omnistab UV 234 ranges between 0.15 and 0.60%, depending on substrate and performance requirements of the final application.

Product composition

  • CAS number(s): 70321-86-7
  • Chemical name(s): 2-(2H-Benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol
  • Molecular formula: C30H29N3O
  • Molecular weight (g/mol): 477.57
  • EU (EG-No (EINECS/ELINCS)): 274-570-6


  • Content (%): 99.00 min
  • Melting point/range (ºC): 137.00 - 141.00
  • Ash (%): 0.05 max
  • Volatiles (%): 0.30 max
  • Transmittance 460 nm (%): 97.00 min
  • Transmittance 500 nm (%): 98.00 min
  • Product form(s): Powder
  • 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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