Characteristics --A white to creamy white powder;
--Readily soluble in water and a variety of organic solvent;
--Good hygroscopicity and adhension;

No.	Specification	K30	K90	K25	K15	K17
1	PH(in 5% solution)	3-5	3-5	3-5	3-5	3-5
2	Viscosity,as K-value	29-32	85-95	24-27	26-30	15-19
3	Aldehyde,ppm	≤500	≤500	≤500	≤500	≤500
4	Peroxides(as H2O2),ppm	≤400	≤400	≤400	≤400	≤400
5	Hydrazine,ppm	≤1	≤1	≤1	≤1	≤1
6	Impurity A(NVP),ppm	≤10	≤10	≤10	≤10	≤10
7	Impurity B(2-pyrrolidone),%	≤3.0	≤3.0	≤3.0	≤3.0	≤3.0
8	Heavy metals,ppm	≤10	≤10	≤10	≤10	≤10
9	Water,%	≤5.0	≤5.0	≤5.0	≤5.0	≤5.0
10	Sulphated ash,%	≤0.1	≤0.1	≤0.1	≤0.1	≤0.1
11	Assay,as Nitrogen content,%	11.5-12.8	11.5-12.8	11.5-12.8	11.5-12.8	11.5-12.8