Omnistab UV 988 – CAS: 6337-43-5

About Omnistab UV 988 – CAS: 6337-43-5

Omnistab UV 988 (6337-43-5) is a benzylidene-bis-malonate type UV absorber. It strongly absorbs in the high energy part of the UV spectrum (short wavelength).

  • CAS number: 6337-43-5
  • Chemical name: Tetraethyl 2,2-(1,4-phenylenedimethylidyne)bismalonate
  • Moleculair formula: C22H26O8
  • Molecular weight (g/mol): 418.437
  • Content (%): 99.00 min
  • Melting point/range (ºC): 137.00 - 139.00
  • Ash (%): 0.10 max
  • Volatiles (%): 0.50 max
  • Transmittance 425 nm (%): 96.00 min
  • Transmittance 500 nm (%): 98.00 min
  • Product form(s): Crystalline powder, Powder
  • Packaging option(s): Carton
Product Data Sheet
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Product Data Sheet

Omnistab UV 988 – CAS: 6337-43-5


Date: Wednesday, Feb 28, 2024

Product Composition

CAS number:6337-43-5
Chemical name:Tetraethyl 2,2-(1,4-phenylenedimethylidyne)bismalonate
Moleculair formula:C22H26O8
Molecular weight (g/mol):418.437

Product Specification

Content (%)99.00 min
Melting point/range (ºC)137.00 - 139.00
Ash (%)0.10 max
Volatiles (%)0.50 max
Transmittance 425 nm (%)96.00 min
Transmittance 500 nm (%)98.00 min
Product form(s):Crystalline powder, Powder
Packaging option(s)Carton
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