can't read?
Potassium bisulphate, is an inorganic compound with the chemical formula KHSO4 and is the potassium acid salt of sulfuric acid.
P 2277 (OTTO) Potassium hydrogen sulphate, GR 99%+ Cas 7646-93-7 - used as a disintegrating agent in analytical chemistry or as a precursor to prepare potassium persulfate, a powerful oxidizing agent.