Sodium diisobutyldithiophosphinate
[CAS# 13360-78-6]

Identification

• Classification: Organic raw materials >> Organometallic compound >> Organic sodium
• Name: Sodium diisobutyldithiophosphinate
• Synonyms: Aerophine 3418A
• Molecular Formula: C₈H₁₈PS₂.Na
• Molecular Weight: 232.32
• CAS Registry Number: 13360-78-6
• EC Number: 236-419-2
• SMILES: CC(C)CP(=S)(CC(C)C)[S-].[Na+]

Properties

• Density: 1.14 g/cm^3*

^* "Metal-Organics Catalog" physical property data were obtained from Gelest, Inc. of Morrisville, Pennsylvania (US)

Safety Data

• Hazard Symbols: GHS05;GHS07 Danger
• Risk Statements: H317-H318
• Safety Statements: P261-P264+P265-P272-P280-P302+P352-P305+P354+P338-P317-P321-P333+P317-P362+P364-P501

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Serious eye damage	Eye Dam.	1	H318
Skin sensitization	Skin Sens.	1B	H317

Discovery and Applications

Sodium diisobutyldithiophosphinate is an organophosphorus compound notable for its unique chemical structure and diverse applications in various industrial sectors. This compound is characterized by the presence of a dithiophosphinate functional group, which imparts distinctive properties that make it suitable for use as a lubricant additive, a corrosion inhibitor, and in other specialized formulations. The discovery of sodium diisobutyldithiophosphinate can be traced back to research focused on phosphorus-containing compounds, particularly those with enhanced lubricating and protective qualities.

The synthesis of sodium diisobutyldithiophosphinate typically involves the reaction of phosphorus sulfide derivatives with isobutyl alcohols, followed by neutralization with sodium hydroxide. This process yields a compound with two isobutyl groups attached to the phosphorus atom, which enhances its solubility and effectiveness in various applications. The development of this compound was motivated by the need for improved additives that can enhance the performance and longevity of lubricants used in machinery and automotive applications.

One of the primary applications of sodium diisobutyldithiophosphinate lies in the lubricant industry, where it functions as an extreme pressure (EP) additive. It is known to improve the anti-wear properties of lubricants, reducing friction and wear on metal surfaces during operation. This characteristic is particularly important in applications involving high loads and severe operating conditions, such as in automotive engines and industrial machinery. The use of sodium diisobutyldithiophosphinate as an additive can lead to significant improvements in the durability and efficiency of lubricating oils, ultimately extending the lifespan of mechanical components.

In addition to its role as a lubricant additive, sodium diisobutyldithiophosphinate is also employed in formulations designed to inhibit corrosion. Its chemical structure allows it to form protective films on metal surfaces, preventing oxidative damage and prolonging the life of various materials. This property is valuable in industries where metal corrosion poses significant challenges, such as in construction, automotive, and marine applications.

Furthermore, sodium diisobutyldithiophosphinate has been studied for its potential use in agricultural applications, particularly as a pesticide or fungicide. Its ability to interact with biological systems may offer opportunities for developing effective pest management solutions that are less harmful to the environment.

Despite its beneficial applications, it is essential to handle sodium diisobutyldithiophosphinate with caution due to its chemical properties and potential environmental impacts. Proper safety protocols should be implemented when working with this compound to minimize risks associated with its handling and use.

In summary, sodium diisobutyldithiophosphinate is a significant organophosphorus compound with a rich history of discovery and diverse applications in lubrication, corrosion inhibition, and potential agricultural uses. Its unique properties make it an important additive in various industrial processes, contributing to enhanced performance and sustainability in the products it is used in.

References

2001. A spectroelectrochemical investigation of the influence of sodium diisobutyldithiophosphinate on silver dissolution in aqueous cyanide. Journal of Applied Electrochemistry, 31(12).
DOI: 10.1023/a:1013807327485

2021. Current Status of Copper-Ore Processing: A Review. Russian Journal of Non-Ferrous Metals, 62(4).
DOI: 10.3103/s1067821221040027

2019. A Critical Overview of Dithiophosphinate and Dithiophosphate Interactions with Base Metal Sulfides and Precious Metals. Mining, Metallurgy & Exploration, 36(1).
DOI: 10.1007/s42461-018-0039-1