YOYO CHEMICALS Address: 6, Floor, Swastik Super Market, Ashram Road, Navrangpura, Ahmedabad-380 009, Gujarat, India Contact Person: Manufacturer of Intermediate and Chemicals : Ammonium Persulfate 98% Min., Sodium Persulfate 99% Min., Ammonium Thiocyanate 99% Min., Sodium Thiocyanate 98% Min., Potassium Thiocyanate 99% Min., Potassium Ferrocyanide 99% Min., Potassium Ferricyanide 98% Min., Sodium Hydrosulfide 30% & 33% Min.