Dibenzyl Disulfide (DBDS) Extreme Pressure Additive

Name: Dibenzyl Disulfide (DBDS) Extreme Pressure Additive
Brand: Chemzip
Price: 1 USD
Availability: InStock

CAS Number: 150-60-7

Dibenzyl disulfide (DBDS) is a highly effective thermally active sulfur-based extreme pressure additive used in gear and metalworking lubricants. The benzylic C–S bond cleaves readily under tribological stress, releasing reactive sulfur that reacts with iron to form a low-shear-strength iron sulfide film, preventing seizure under high contact pressures. DBDS delivers excellent 4-ball EP performance and is commonly blended with phosphorus-based antiwear additives in GL-5 gear oil packages.

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Technical Specifications

purity	≥99.0 wt%
appearance	White to off-white crystalline solid or flakes
melting point	70–72 °C
sulfur content	25.0–26.5 wt%
4-ball weld load	>315 kgf
flash point (COC)	>180 °C

Applications

GL-5 hypoid gear oils for rear axles and limited-slip differentials
Extreme pressure industrial gear oils and compressor oils
Cutting oils and metalworking fluids for heavy-duty machining
Wire drawing and metal forming lubricants
Grease formulations requiring high EP performance

Key Features

High-purity crystalline product with well-defined sulfur reactivity for consistent EP performance
Excellent 4-ball weld load performance in gear oil and metalworking fluid applications
Readily soluble in mineral and synthetic base oils, including PAO and ester-based lubricants
Synergizes with phosphorus-based additives (ZDDP, TCP) for balanced EP-antiwear formulations