Potassium acetate for snow melting in north America

Appearance : white
Assay%: 99.0%-100.5%
pH of a 5% solution at 25C: 7.5-8.5
Aluminum(AI) %: ≤0.0001
Chloride(CI) %: ≤ 0.01
Heavy Metal(as Pb)%: ≤ 0.002
Iron(Fe) %: ≤ 0.001
Loss on Drying(2h @150C) %: ≤ 8.0

TESTS
Solution S
Dissolve 10.0 g in distilled water and dilute to 100 ml with the same solvent.
Appearance of solution
Solution S is clear and colourless.
pH
Dissolve 1.0 g in carbon dioxide-free water and dilute to 20 ml with the same solvent. The pH of the solution is 7.5 to 9.0.
Reducing substances
Dilute 10 ml of solution S to 100 ml with water. Add 5 ml of dilute sulphuric acid and 0.5 ml of a 0.32 g/l solution of potassium permanganate. Mix and boil gently for 5 min. The solution remains pink.
Chlorides
Dilute 2.5 ml of solution S to 15 ml with water. The solution complies with the limit test for chlorides (200 ppm).
Sulphates
Dilute 7.5 ml of solution S to 15 ml with distilled water. The solution complies with the limit test for sulphates (200 ppm).
Aluminium
If intended for use in the manufacture of peritoneal dialysis solutions, haemofiltration solutions or hem dialysis solutions, it complies with the test for aluminium. Dissolve 2.0 g in 50 ml of water and add 5 ml of acetate buffer solution pH 6.0. The solution complies with the limit test for aluminium (1 ppm). Use as a reference solution a mixture of 1 ml of aluminium standard solution (2 ppm Al), 5 ml of acetate buffer solution pH 6.0 R and 49 ml of water. To prepare the blank use a mixture of 5 ml of acetate buffer solution pH 6.0 R and 50 ml of water.
Iron
Dilute 5 ml of solution S to 10 ml with water. The solution complies with the limit test for iron (20 ppm).
Heavy metals
Dissolve 5.0 g in water and dilute to 20 ml with the same solvent. 12 ml of the solution complies with limit test A for heavy metals (4 ppm). Prepare the standard using lead standard solution (1 ppm Pb).
Sodium
Not more than 0.5 per cent of Na, determined by atomic emission
Loss on drying
Not more than 3.0 per cent, determined on 1.000 g by drying in an oven at 100 °C to 105C.

Identification- A solution (1 in 10) responds to the tests for Potassium and for Acetate.
pH: between 7.5 and 8.5, in a solution (1 in 20).
Loss on drying- Dry it at 150 for 2 hours: it loses not more than 1.0% of its weight.
Heavy metals- the limit is 0.002%.
Limit of sodium- To pass the test not more than 0.03% of sodium is found.