BLS 1710

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BLS 1710 (2440-22-4) is a benzotriazole type ultraviolet light absorber (UVA), imparting good light stability for plastics and other organic polymers.  BLS 1710 protects polymers as well as organic pigments from UV radiation helping to preserve the original appearance and physical integrity of engineered plastics, elastomers, PVC, adhesives, and polyurethanes during outdoor weathering.


Chemical Name:                     2-(2H-Benzotriazole-2-yl)-4-methylphenyl

CAS Number:                         2440-22-4

Chemical Structure:

BLS 1710

Typical Properties         

Product Form:                         Solid

Melting Point:                          128 – 132oC

Molecular Weight:                   225 g/mol


BLS 1710 is useful for the light stabilization of a wide range of plastics, including PVC, styrenic polymers, unsaturated polyesters, acrylics, and polyvinyl butyral. Specialty applications include adhesives, sealants, epoxy resins, and elastomers.


  • Strong absorption of ultraviolet radiation in the 300-400 nm region
  • Low color contribution
  • Good compatibility and solubility
  • FDA cleared for use in acrylics, PVC, polystyrene, polycarbonate, and PET

Guidelines for Use

Typical recommended use levels range between 0.1% and 0.5% in plastics. Combinations with other light stabilizers such as HALS and benzoates often show enhanced performance. The exact formulation to be used is dependent on the substrate, performance requirements, and other factors, and should be determined by the user based on testing to simulate actual conditions of use. Please contact Mayzo for specific recommendations.


This product may be stored up to two years in a sealed container. Containers should be kept tightly closed when not in use and stored in a cool, dry place.


Please consult the Safety Data Sheet (SDS) prior to handling or using this product.

FDA Regulations

BLS 1710 has been cleared under 21 CFR §178.2010 for use in acrylic and modified acrylic plastics, rigid polyvinyl chloride and vinyl chloride copolymers, polystyrene (including rubbermodified polystyrene), polycarbonate resins, and ethylene phthalate polymers. Please contact your Mayzo representative for complete details, including restrictions of use.

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