Specifications:
Ⅰ.Technical grade:
a) Powder: K15, K17, K30
Appearance: white or yellow-white powder
K-value:
K15: 13.0-18.0
K17: 17.0-22.0
K30: 27.0-32.0
Solids content: 95.0-100.0
PH value (10% in water): 3.0-7.0
Sulphate ashes: ≤0.1%
NVP Content:
K15 & K17: ≤0.5
K30: ≤0.2
b) Solution: K30, K60, K85, K90, K115
Appearance: clear colorless or pale yellowish aqueous solution
K-value:
K30: 27.0-32.0
K60: 52.0-62.0
K85: 78.0-88.0
K90: 88.0-98.0
K115: 110.0-130.0
Solids content:
K30: 29.0-31.0
K60: 38.0-42.0
K85 & K90: 19.0-21.0
K115: 10.5-11.5
PH value (10% in water): 7.0-9.0
Sulphate ashes: ≤0.1%
NVP content:
K30, K85, K90 & K115: ≤0.2
K60: ≤0.5

Ⅱ.Pharmaceutical grade: (USP25)
a) Powder: K15, K17, K25, K30
Appearance: white or slightly yellow with light specific smell powder
PH value (10% in water): 3-7
Moisture: ≤5.0%
K-value:
K15: 12.75-17.25
K17: 15.3-18.4
K25: 22.5-27.0
K30: 27.0-32.4
Aldehyed: ≤0.05%
Sulphate ashes: ≤0.1%
Heavy metal, ppm: ≤10
Hydrazine, ppm: ≤1
Peroxide compounds: ≤0.04%
NVP content:
K15 & K17: ≤0.2
K25 & K30: ≤0.1
b) Solution: K90
Appearance: clear solution
PH value (10% in water): 7.0-9.0
Moisture: 79-81%
K-value: 81.0-97.2
Aldehyed: ≤0.05%
Sulphate ashes: ≤0.1%
Heavy metal, ppm: ≤10
Hydrazine, ppm: ≤1
Peroxide compounds: ≤0.04%
NVP content: ≤0.1