Introduction to HS OT 20 (CAS 9035-99-8)

HS OT 20. also known as Crystex™ HS OT 20. is a high-stability insoluble sulfur compound widely used as a vulcanizing agent in the rubber industry. This article provides a comprehensive overview of its chemical properties, applications, and safety considerations.

Chemical Properties

HS OT 20 is a yellow powder with a high content of insoluble sulfur. It is insoluble in elastomers, which helps to retard bin scorch, prevent sulfur migration, and preserve surface tack. The product is a metastable compound that can revert to soluble sulfur if not stored under proper conditions.

Applications

HS OT 20 is used as a vulcanizing agent in various rubber formulations, particularly in the production of tires, rubber belts, hoses, and seals. It is especially effective in radial tires and other high-performance rubber products. The product offers excellent thermal stability and non-staining properties, making it suitable for applications where color and surface finish are critical.

Packaging and Storage

HS OT 20 is typically packaged in 25 kg paper bags lined with polyethylene bags. It should be stored in a cool, dry place with good ventilation, avoiding direct sunlight and moisture. The product has a shelf life of one year when stored properly.

Safety and Handling

HS OT 20 is classified as a combustible material. It may form combustible dust concentrations in air, so it should be kept away from heat, sparks, and open flames. Proper handling and storage are essential to ensure its safe and effective use.

Precautionary Statements:

P210: Keep away from heat/sparks/open flames. No smoking.

P243: Take precautionary measures against static discharge.

P501: Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations.

Conclusion

HS OT 20 is a versatile and high-performance vulcanizing agent with a wide range of applications in the rubber industry. Its improved properties, such as delayed action and high anti-scorching quality, make it particularly suitable for products requiring high performance and durability. Proper handling and storage are essential to ensure its safe and effective use.