Congo Red (10gr)

Ammonium Sulfide (500ml 20%) Ammonium hydrosulfide is the chemical compound with the formula [NH4]SH. Composition Ammonium Sulfide is the salt derived from the ammonium cation and the hydrosulfide anion. The salt

Potassium Sulfite (500gr) Potassium Sulfite is the inorganic compound with the formula K2SO3. It is the salt of potassium cation and sulfite anion. It is a white solid that