Pvp-k90

We are engaged in offering excellent quality PVP-K90 to our valuable clients.
Chemical Description:polyvinylpyrrolidone
CAS No.9003-39-8
Molecular and Structural Formula(C6H9NO)n

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 a 500 a 500 a 500 a 500 a 500
4 Peroxides(as H2O2),ppm a 400 a 400 a 400 a 400 a 400
5 Hydrazine,ppm a 1 a 1 a 1 a 1 a 1
6 Impurity A(NVP),ppm a 10 a 10 a 10 a 10 a 10
7 Impurity B(2-pyrrolidone),% a 3.0 a 3.0 a 3.0 a 3.0 a 3.0
8 Heavy metals,ppm a 10 a 10 a 10 a 10 a 10
9 Water,% a 5.0 a 5.0 a 5.0 a 5.0 a 5.0
10 Sulphated ash,% a 0.1 a 0.1 a 0.1 a 0.1 a 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

Packaging and Storage:-
--Packed in 25,50kg plastic drum, inner lined with PE bags;
--Stored in dry place at room temperature.