Chemical Description:polyvinylpyrrolidone, Povidone k30CAS No.9003-39-8Molecular and Structural Formula(C6H9NO)nCharacteristics --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 | Packaging and Storage--Packed in 25,50kg plastic drum, inner lined with PE bags;--Stored in dry place at room temperature; |