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UV Absorber UV-326 2018-11-01T11:28:29+00:00

Bumetrizole | CAS 3896-11-5

  • CAS No.: 3896-11-5
  • EINECS No.: 223-445-4
  • Molecular Formula: C17H18N3OCl

Product Information of Bumetrizole (CAS 3896-11-5)

Bumetrizole is an intermediate reactant in the synthesis of UV light absorbers for polyester fibers. It is a high efficient UV absorber, which can effectively absorb 270-380 nm UV light.

  • Product Name: UV Absorber UV-326
  • Chemical Name: 2-(2′-Hydroxy-3′-tert-butyl-5′-methylphenyl)-5- chlorobenzotriazole
  • Molecular Weight: 315.8 g/mol
  • Synonyms: Bumetrizole; ULTRAVIOLET ABSORBENT UV-326; ULTRA-VIOLET ABSORBER UV-326; Light Stabilizer 326
  • Category: Benzotriazole UV Absorber

Specifications of Bumetrizole (CAS 3896-11-5)

Appearance Yellowish crystalline powder
Assay ≥99%
Boiling Point 460.4°C at 760mmHg
Flash Point 232.3°C
Melting Point 137-142°C
Ash ≤0.1%
Loss on drying ≤0.5%
Transmittance 460nm≥93%; 500nm≥96%
Recommended dosage PVC Polyolefin ABS
0.2-0.5% 0.2-0.5% 0.3-0.5%
Packaging 20kg or 25kgs/drum or carton

Properties of Bumetrizole (CAS 3896-11-5)

It is odorless, good thermo stability under high temperature. Not stained in alkali,and oil resistant.

Applications or uses of Bumetrizole (CAS 3896-11-5)

UV-326 is an important ultraviolet absorber of Benzotriazole series. With the advantages of stable, nontoxic, higher absorbency for ultraviolet ray, it is widely used in photosensitive materials such as color film, color paper and polymer, outer protective coating and many fields.

  1. This product almost does not absorb visible light, particularly applicable to colorless and light-colored products.
  2. Mainly applied to polyolefin (especially in food grade products), PVC, PA, ABS resin, AS resin, PU, etc.

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