Antioxidant ST - 57

Name of foreign counterpart：IRGANOX L57

Typical chemical and physical properties： 

ST-57 is a liquid, octylated/butylated diphenylamine, antioxidant for lubricants and greases

Appearance         Clear, slightly viscous, yellow toreddish-brown liquid

Density at 20 C      0.97 g/cm3

Viscosity at 40 C     280 mm2/s

Flash point          > 185 °C, COC

Solubility

Ester           > 5 %

Mineral oil      > 5 %

Water          < 0.01 %

Nitrogen content     4.5 %

Applications and typical treat levels recommended:

Mineral oil base industrial lubricants          0.1 - 0.5 %

Synthetic industrial lubricants and greases      0.3 - 1 %

Engine oils                               0.3 - 1 %