Agent Name

Phosphorodithioic acid, mixed O,O-bis(iso-Bu and pentyl) esters, zinc salts

CAS Number




Major Category



Dithiophosphoric acid, O,O'-isobutyl amyl ester, zinc salt; Zinc dialkyl dithiophosphorate; [ChemIDplus] BB 3; PARANOX 15; ZDDP; ZDTP; [IUCLID] DYNAGEAR SL; [Imperial Oil MSDS]


Organic Compounds, Metal Salts


Amber viscous liquid; [EPA ChAMP: Initial Risk-Based Prioritization: Supporting Documents] Black semi-fluid; [Imperial Oil MSDS]


Used as multi-functional anti-wear agents and antioxidants for gasoline and diesel motor oils and industrial oils; [EPA ChAMP: Initial Risk-Based Prioritization: Supporting Documents] Used as a grease; [Imperial Oil MSDS]


Causes skin and mild to severe eye irritation in rabbits; Not a skin sensitizer in a guinea pig maximization test; Skin necrosis and possible adverse effects on male reproductive system observed in 28-day dermal study of rabbits; [IUCLID] Members of the zinc dialkyldithiophosphates (ZDDP) category demonstrate low acute oral and dermal toxicity; Moderate systemic toxicity in repeated-dose oral and dermal studies; Moderate systemic toxicity in adults, moderate postnatal developmental toxicity, and no effects on reproductive parameters or reproductive organs in an oral combined reproductive/developmental study of rats; Moderate male reproductive organ toxicity in several repeated-dose dermal studies of rabbits; [EPA ChAMP: Initial Risk-Based Prioritization: Supporting Documents] May cause mild eye irritation; Minimally toxic by all routes of exposure, based on structurally similar substances; [Imperial Oil MSDS] See "Zinc dialkyldithiophosphates." See "zinc."

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