Sulfur (Rubber Vulcanizing Agent)
CAS Number: 7704-34-9
Sulfur is the foundational vulcanizing agent for natural and synthetic diene rubbers, forming polysulfidic crosslinks that provide elasticity, strength, and durability. Insoluble sulfur grades prevent sulfur blooming in uncured compounds and are preferred for tire ply and belt applications. Rubber-grade sulfur is available as powder, granules, or oil-treated forms for improved dispersion and dust control.
Technical Specifications
| appearance | Yellow powder or granules |
| purity (%) | ≥99.5 |
| moisture (%) | ≤0.3 |
| ash content (%) | ≤0.1 |
| insoluble sulfur (IS) content (%) | 60–90 (IS grade) |
Applications
- Tire tread, sidewall and ply compounds
- Industrial rubber belts and hoses
- General purpose rubber goods
- Rubber shoe soles
- Sponge and foam rubber
Key Features
- Essential crosslinking agent for diene rubbers
- Insoluble grades prevent blooming in green compounds
- Available in oil-treated dust-free granules
- Compatible with all major accelerator systems
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CAS Number
7704-34-9
Category
Plastic / Rubber AdditivesAvailability
In StockSample
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