Salts & Minerals
REACH
Sodium diisobutyl dithiophosphate
CAS Number
53378-51-1
EC Number
258-969-9
What is Sodium diisobutyl dithiophosphate?
Sodium diisobutyl dithiophosphate (CAS 53378-51-1) is an organosulfur salt used as a collector and surface-active agent in mineral processing and as a functional additive in metalworking formulations.
Where is Sodium diisobutyl dithiophosphate used?
- Froth flotation: selective collector for copper, lead, and zinc sulfide ores
- Mixed-sulfide ore circuits: selectivity over iron sulfides improves downstream metallurgical performance
- Metalworking fluids: extreme-pressure and anti-wear additive for high-load conditions
- Industrial lubricants and hydraulic fluids: corrosion inhibitor that chelates dissolved metal ions
- It forms protective films on metal surfaces during cutting and grinding.
Commercial specifications
- Aqueous solution, around 25–40% active content
- Higher-concentration grades available depending on supplier
- Packaging: drums, IBC totes, bulk tanker supply
Other Names (Synonyms)
Sodium O,O-diisobutyl dithiophosphate|Phosphorodithioic acid, O,O-bis(2-methylpropyl) ester, sodium salt|Isobutyl sodium phosphorodithioate|Phosphorodithioic acid, O,O-bis(2-methylpropyl) ester, sodium salt (1:1)|RefChem:862867
What are the physical properties of Sodium diisobutyl dithiophosphate?
Melting Point 55 °C
Density 1.1[at 20℃]
Odor Faint odor
Form Colorless to faint yellow liquid
Water Solubility 1000g/L at 20℃
Vapor Pressure 0Pa at 25℃
Log P 1.67 at 22℃