Description

O,o-Diisooctyl Hydrogen Dithiophosphate is a versatile organophosphorus compound primarily used as an effective extreme pressure (EP) additive and anti-wear agent. Its value lies in its ability to form protective films on metal surfaces, significantly reducing friction and wear under high-load conditions. This makes it a critical component for manufacturers in the lubricant and metalworking fluid industries seeking to enhance equipment performance and longevity.

Application

• As a primary extreme pressure (EP) additive in industrial gear oils, hydraulic fluids, and metalworking fluids.
• As an anti-wear agent in lubricating greases and compressor oils to protect machinery components.
• As a corrosion inhibitor and multifunctional additive in synthetic and semi-synthetic lubricant formulations.
• In the formulation of specialty lubricants for the mining, steel, and heavy machinery sectors.
• As a synergistic component in additive packages containing zinc dialkyldithiophosphates (ZDDP) or other phosphorus-based compounds.
• In the production of pesticide intermediates and other organophosphorus chemicals.

Basic Information

Product Name	O,o-Diisooctyl Hydrogen Dithiophosphate
CAS No.	26999-29-1
Molecular Formula	C₁₆H₃₅O₂PS₂
Molecular Weight	354.5 g/mol
Synonyms	Diisooctyl Dithiophosphoric Acid; O,O-Diisooctyl Hydrogen Phosphorodithioate; Dithiophosphoric Acid O,O-Diisooctyl Ester; DIOP; Phosphorodithioic Acid, O,O-Diisooctyl Ester; Isooctyl Dithiophosphate; Antiwear Additive DIOP; CAS 26999-29-1
EINECS	Contact for details

Quality Control

Our O,o-Diisooctyl Hydrogen Dithiophosphate is manufactured under strict quality management systems to ensure batch-to-batch consistency and performance reliability. The product undergoes rigorous analytical testing, including assay, acidity, and impurity profile determination. Certificates of Analysis (COA) documenting key specifications are provided with each shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from heat sources and incompatible materials. This product is easily oxidized; storage under an inert atmosphere (e.g., nitrogen) is recommended for long-term preservation of quality. Keep away from strong acids and strong oxidizing agents.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (Titration)	≥ 95.0%
Acidity (as H₃PO₄)	≤ 1.0%
Water Content (KF)	≤ 0.2%
Specific Gravity (20°C)	0.95 - 1.00

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.