We are SI Group, the world's leading developer and manufacturer of chemical intermediates.

We are a critical component. We are integral to countless industrial and consumer products - making them possible, making them better, and improving their value. Our diverse range of products are used in a variety of applications ranging from tires, fuel additives and plastics to surfactants.

We are guided by more than a century of strong values, integrity, innovation and dedication to continuous improvement.

Your objectives. Your products. Our unmatched expertise and commitment to developing and manufacturing the highest quality chemical intermediates in the world. You won’t find a more reliable, intelligent, or dedicated partner to help bring your vision to reality.