Antioxidant 168

Antioxidant 168 belongs to the group of phosphite antioxidant and it has excellent performance. It has high extration resistance, is stable to hydrolysis, and can increase the light stability. Antioxidant 168 can be used together with different phenolic antioxidants. By using together with hindered amine antioxidants 1010 and 1076,  it has good synergistic effect, and also improve polymer materials’ stability during thermal processing. In addition, there are more kinds of formulations compounded with phenolic antioxidants, and they are largely applied in polyolefins (such as polyethylene, polypropylene) and polyamides, olefin copolymers, PS resins, polycarbonates, engineering plastics, PVC, rubber, ABS resin, petroleum products, and other polymer materials

Product Details

Chemical information 

Synonyms: tri(2,4-Ditertrabutylphenyl)phosphiteester;Phenol,2,4-bis(1,1-dimethylethyl,phosphite(3:1);Doverphos-S-480;

Molecular Structure:

antioxidant 168 molecular

Molecular Formula: C42H63O3P Molecular Weight: 647
CAS No: 31570-04-4 EINECS No: 250-709-6
Density(g/cm3): 1.03 Average particle size(um): /
Melting point(℃): 183-187 PH: 6

Technical Datas

Item Standard
Appearance    White Powder
Purity     99.0%
Melting Range    183~187 ℃
Volatile    ≤  0.3%
Solubility (2g/20ml, Toluene)    Limpidity
Light Transmittance 425nm,    ≥  98%
500nm    ≥  98%
Acid Number    ≤  0.3 (mgKOH/g)
Anti-Hydrolyze(95℃, Water, 5h)    Qualified
2,4- t-Butyl-Phenol    ≤  0.2%


Antioxidant 168  is excellent phosphite antioxidants. It has good solubility in  chloroform, benzene,cycloalkyl and other organic solvents. It is slightly soluble in acetic acid and ethanol and not soluble in water and alcohol. It has low volatility and toxicity, good hydrolysis resistance and high thermal stability


It can be used for Polymer materials like polyamide, polylefins ( PE, PP etc.),  ABS,polycarbornate