2- methyl thio thio benzothiazole
Supplier uploads its business license firstly. If it pass Echemi audit , supplier can get logo of certified business license.
Echemi go to the factory and do a serious actual investigation. If the factory meets requirement, it can get logo of certified factory.
If the supplier get credit guarantee from Echemi, it owns logo of certified credit guarantee.
The supplier purchased Echemi silver service.
The supplier purchased Echemi gold service.