Omnistab UV 327

Omnistab UV 327 acts as an ultraviolet light absorber. Is a strong absorber of ultraviolet radiation in the 290~400nm region and has a high degree of photostability-photochemical energy absorbed in the ultraviolet region is dissipated as thermal energy. Exhibits good initial color, low volatility, excellent stability to heat as well as light, superior wash fastness, and resistance to gas fading.
The low pKa and high hindrance of the phenolic group result in low sensitivity to metal containing ingredients in polymer formulation – catalysts residues, metallic driers, etc. It can be used in combination with phenolic & phosphite antioxidants, and HALS to optimize performance in outdoor use. It is particulary suitable for polypropylene and polyethylene as well as cold cured polyesters, polyurethanes.

Product composition

  • CAS number(s): 3864-99-1
  • Chemical name(s): 2,4-di-tert-butyl-6-(5-chlorobenzotriazol-2-yl) phenol
  • Molecular formula: C20H24CIN3O
  • Molecular weight (g/mol): 357.88
  • EU (EG-No (EINECS/ELINCS)): 223-383-8


  • Content (%): 99.00 min
  • Melting point/range (ºC): 154.00 - 156.00
  • Volatiles (%): 0.50 max
  • Ash (%): 0.10 max
  • Transmittance 460 nm (%): 95.00 min
  • Transmittance 500 nm (%): 97.00 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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