CAS No. [2440-22-4]
Chemical name: 2-(2-hydroxy-5-methylphenyl)benzotriazole
Molecular formula: C₁₃H₁₁N₃O
Molecular weight: 225.3
Specification:
Appearance: white to light yellow powder
Assay: 99% min.
Melting point: 128.0-132.0癈
Loss on drying: 0.5% max.
Ash: 0.1% max.
Transmittance:
at 440nm: 97% min.
at 500nm: 98% min.
Packing: 20/25kg fiber drum
Usage:
As the ultraviolet absorption agent, it is available to polyester, epoxy, cellulose acetate, PVC, polystyrene, plexiglass and polyacrylonitrile resin etc. The maximum absorbing wavelength range is 270-380nm.

CAS No. [31570-04-4]
Chemical name: Tris-(2.4-di-t-butylphenyl)- phosphite
Molecular formula: C₄₂H₆₃O₃P
Molecular weight: 646.94
Specification:
Appearance: white crystalline powder
Melting point: 182 186.5癈
Acidity, mg KOH/g: 0.3% max.
Volatiles: 0.5% max.
Free 2,4-di-tert.-butyl-phenol: 0.2% max.
Transmittance:
425 nm: 97% min.
500 nm: 98% min.
Assay: 99% min.
Solubility: clear solution
Packing: 25 kg carton
Usage:
The product is a kind of high-effective solid phosphite ester antioxidant, which is superior to other phosphite ester in the effective protection of polymers color. It is often blended with phenolic principal antioxidant (such as Antioxidant 1010) to prepare composite antioxidant which improves the thermo-stability of polymer processing, thus making it widely applied in PE, PP, PS, PA, PC, ABS and many other polymer materials.

CAS No. [6683-19-8]
Chemical name: Pentaerythritol-tetra-[β-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionate]
Molecular formula: C₇₃H₁₀₈O₁₂
Molecular weight: 1177.65
Specification:
Appearance: white crystalline powder
Melting point: 110 - 125癈
Ash: 0.1% max.
Volatiles: 0.5% max.
Transmittance:
425 nm: 97% min.
500 nm: 98% min.
Content: 98% min.
Solubility (2.5g/25ml toluene): clear
Packing: 25 kg carton
Usage:
This product is that a kind of pluralism is obstructed the phenol type and resisted oxygen pharmaceutical, have very good compatibility with most polymer. There is good function of changing color of preventing the light and heat from causing. Used PE, PP, PS, polyamide, polyformaldehyde, ABS resin, PVC, synthetic rubber, etc. in the high polymer material extensively. Used for preventing the hot oxygen of the oil and coating from wearing out too.

CAS No. [65447-77-0] and [70624-18-9]
Chemical name: Poly-(N- b -hydroxyethyl-2,2,6,6-tetramethyl-4-hydroxy
-piperidyl succinate) and
Poly-{[6-[(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-diyl]
[(2,2,6,6-tetramethyl-4-piperidyl)imino]-1,6-hexanediyl[(2,2,6,6
-tetramethyl-4-piperidyl)imino]}
Molecular weight: >2500
Specification:
Appearance: light yellow granular
Volatile: 0.75% max.
Transmittance: 425nm 90% min.
500nm 94% min.
Ash: 0.1% max.
Packing: 25kg fibre drum
Usage:
Used in polyolefin (PP, PE), polyurethane, polyformaldehyde, polyamide and polyester and polyester with elastomers. And it can be used in engineering plastic such as ABS.