2,5-Bis(octyldithio)-1,3,4-thiadiazole CAS NO 13539-13-4

2,5-Bis(octyldithio)-1,3,4-thiadiazole

CAS No. 13539-13-4

Original :China 

Product features:

Ultra low ash, low phosphorus, low sulfur, and post-treatment protection

Low conductivity, insulation, copper aluminum corrosion resistance, low friction, high speed stability

Sulfur free, ash free, hydrogen embrittlement resistant, high temperature resistant.

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Product Analysis

2,5-Bis(octyldithio)-1,3,4-thiadiazole

CAS No.: 13539-13-4

1. Product Identification

- Chemical Name: 2,5-Bis(octyldithio)-1,3,4-thiadiazole
- CAS No.: 13539-13-4
- Molecular Formula: C₁₈H₃₄N₂S₅
- Molecular Weight: 438.35 g/mol
- Application: Lubricant additive, metal deactivator, copper corrosion inhibitor, antioxidant and antiwear agent



2. Physical and Chemical Properties

- Appearance: Light yellow to amber viscous liquid
- Density (20 °C): 1.05 – 1.15 g/cm³
- Flash Point (open cup): ≥ 130 °C
- Moisture: ≤ 0.10%
- Ash Content: ≤ 0.10%
- Sulfur Content: 35.0 – 38.0%
- Nitrogen Content: 6.0 – 7.0%
- Copper Corrosion Test (100 °C, 3 h): Grade 1a
- Insoluble Impurities: ≤ 0.05%
- Purity (HPLC): ≥ 95.0%

Superior Metal Deactivator for Optimal Lubrication & Protection

A metal deactivator (passivator) is a critical lubricant additive that neutralizes metal-catalyzed oxidation & corrosion, delivering longer oil life, better equipment protection, and stable lubrication

Core Mechanisms

Film Formation: Creates a dense inert barrier on metal (especially copper/alloys) to block active sulfur, acids, and radicals

Chelation: Binds metal ions (Cu²⁺, Fe³⁺) into stable complexes, eliminating their catalytic oxidation effect

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Synergy: Works with antioxidants (e.g., Irganox) to boost oxidative stability

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Top-Performing Types

Benzotriazole (BTA) / Tolyltriazole (TTA) Derivatives

Oil-soluble, ashless, low-dose (0.01–0.05%)

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Salen-Type Complexes

For aviation/jet fuels; neutralizes trace copper (0.1 ppm+).

Key Benefits

✅ Extend oil drain intervals✅ Prevent copper blackening & corrosion✅ Reduce sludge/varnish✅ Lower maintenance costs✅ Compatible with most lubricant additives

Typical Applications

Engine oils, gear oils, hydraulic fluids

Turbine oils, transformer oils, metalworking fluids

Greases, aviation fuels

Manufacturer :Hunan SLQ Materials Technology Co.LTD
Email:info@hnjd-tech.com
https://www.fueloil-additive.com/