木聚硫钠

Appearance

White or off white powder

Off white powder

Identification

¹H- NMR spectrum

Complied

Average MW

4000-7000 Daltons    

    5530

Content of LMW component

NMT 12.0 %     

8.6%

Ph

4.5 to 6.5

5.5

Sulphur content

  13.0 to 20.0 wt%

15.3%

D-Glucuronic acid content（半乳糖醛酸）

7.0 to 12.0 wt%

9.3%

Heavy metals

NMT 30 ppm

Passed

Solubility

Soluble in water, sparingly soluble in 0.1 N NaOH solution and practivally insoluble in methanol

Results

The product conforms to the above specifications