Nantong Botao Chemical Co. Ltd.

Nantong Botao Chemical Co. Ltd (formerly known as Connect Rugao Chemical Ltd.) does produce corrosion inhibitors under the well-established brand “Connect Rugao” being the global leader in both, Benzotriazole and Tolyltriazole..

Connect Chemicals does take the lead in marketing while taking the role as Lead Registrant in Europe as per REACh regulation.

With the extension of the product range by producing Bishenol S, the plant contributes to a new area of cooperation and extended product portfolio to customers.

Production Capacity

  • 1,2,3-Benzotriazole (BTA) – 6000 mt/year
  • Tolyltriazole (and its salts) – 6000 mt/year
  • 5-Methylbenzotriazole – 500 mt/year
  • Bisphenol S – 2000 mt/year

Both Benzo- and Tolyltriazole are being used as corrosion inhibitor in antifreeze, coolants/lubricants and industrial water treatment products. Connect Chemicals has a distribution agreement for strategic markets.

Bisphenol S is used as a developer in thermal paper, textile additive, curing fast-drying epoxy glues and as corrosion inhibitor. It is also commonly used as a reactant in polymer reactions and especially production of Polyethersulfon (PES).


  • Cyclisation
  • Distillation


  • Certified quality management systems as per ISO 9001; ISO 14000 and ISO 18000


  • Approximately 250 employees