Name of Product : Potassium Hydroxide
Test Name SPECIFICATION
IP BP EP USP - NF JP FCC AR
Description - White or almost white, crystalline, hard masses, supplied as sticks, pellets or irregularly shaped pieces, deliquescent, hygroscopic, absorbing carbon dioxide. White or almost white, crystalline, hard masses, supplied as sticks, pellets or irregularly shaped pieces, deliquescent, hygroscopic, absorbing carbon dioxide. White or practically white, fused masses or small pellets, or flakes, or sticks, or other forms.Exposed to air, it rapidly absorbs carbon dioxide and moisture. White fused masses, in small pellets, in flakes, in sticks, and in other forms. It is hard and brittle, and shows a crystalline fracture. White or nearly white pellets,flakes, sticks, fused masses, or other forms. Upon exposure to air it readily absorbs carbon dioxide and moisture. White, crystalline masses,supplied as sticks, pellets or slabs; deliquescent. Readily absorbs carbon dioxide.
Solubility - Very soluble in water, freely soluble in ethanol (96%). Very soluble in water, freely soluble in ethanol (96%). Very soluble in boiling alcohol; freely soluble in water, in alcohol, and in glycerin. Freely soluble in water and in ethanol (95), and practically insoluble in diethyl ether. Very soluble in water, freely soluble in alcohol and in glycerin. -
Identification - 1. pH of 0.01 g in 100 ml water should be minimum 10.5 2. Solution A give reaction of Potassium. 1. pH of 0.01 g in 100 ml water should be minimum 10.5 2. Solution A give reaction of Potassium. 1. Solution S give reaction of Potassium. 1. A solution of Potassium Hydroxide (1 in 500) is alkaline. 2. Solution of Potassium Hydroxide (1 in 25) responds to the tests for potassium. 1. Solution S give reaction of Potassium. 1.Solution S give reaction of Potassium. 2. pH of 0.01 g in 100 ml water should be minimum 10.5
Appearance of solution - 10% solution is clear and colourless. 10% solution is clear and colourless. - 5% solution is clear and colourless. - 10% solution is clear and colourless.
Arsenic (As) - - - - - - -
Heavy metals (as Pb) - Max. 10 ppm Max. 10 ppm Max. 30 ppm Max. 30 ppm - Max. 10 ppm
Iron (Fe) - Max 10 ppm Max 10 ppm - - - Max 10 ppm
Insoluble substances - - - Solution is complete, clear, and colourless. - Solution is complete, clear, and colourless. -
Carbonate - Max. 2.0% Max. 2.0% Max. 3.5% Max. 2.0% Max. 3.5% Max. 2.0%
Lead - - - - - Max 2 ppm Max 5 ppm
Mercury - - - - - Max 0.1 ppm -
Phosphate (PO4) - Max. 20 ppm Max. 20 ppm - - - Max. 20 ppm
Chloride (Cl) - Max. 50 ppm Max. 50 ppm - Max. 50 ppm - Max. 50 ppm
Sulphate (SO4) - Max. 50 ppm Max. 50 ppm - - - Max. 50 ppm
Sodium (Na) - Max. 1.0% Max. 1.0% - No persistent yellow color develops. - -
Assay - 85.0 - 100.5% 85.0 - 100.5% Min. 85.0% Min. 85.0% 85.0 - 100.5% Min. 85.0%