Omnistab UV BP 4

Omnistab UV BP 4 is a 2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid. Acts as a ultraviolet (UV) light absorber with wide absorption band (280 – 360 nm range). The acid group need to be neutralized with one of the usual neutralizing agents, such as, triethanolamine and NaOH. Improves the weatherability and is soluble in water. Used in water borne coatings and water based dyes. Omnistab UV BP 4 is also a water soluble ultraviolet UV A and UV B absorber widely used in sunscreen preparations with very high sun protection.

Product composition

  • CAS number(s): 4065-45-6
  • Chemical name(s): 2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid
  • Molecular formula: C14H12O6S
  • Molecular weight (g/mol): 308 g/mol
  • EU (EG-No (EINECS/ELINCS)): 223-772-2


  • Content (%): 99.50 min
  • Volatiles (%): 3.00 max
  • Melting point/range (ºC): 170.00
  • Residue on ignition (%): 0.10 max
  • Color Gardener (%): 4.00 max
  • Specific Extinction (at 287 nm): 460 min
  • Specific Extinction (at 324 nm): 275 min
  • Odour: Faint characteristic
  • K-Value at 285 nm (l/g-cm): 45.00 -50.00
  • Ph, 1% aqueous solution @25˚C: 1.20 - 2.20
  • 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.

Visit Deltachem