... 3.We'r manufacturer 1. PRODUCT DESCRIPTION: MEMBRANE POTASSIUM HYDROXIDE 90% ,White flakes, HG/T 3688-2010, Molecular Formula:KOH2. PHYSICAL ... ,sunshine dumpping, The humidity in the houseware should always below 85%, the packing must be sealed,strictly prohibit damp.keep it ... away from heat, combustible and acids. Potassium Hydroxide 90% flake w/high quality,low price