Item

Standard

Properties

It is white or with light yellow powder, no smell, easily soluble in water, and nearly insoluble in alcohol and ester.

distinguish

toluidine blue o

positive reaction

anthranone

positive reaction

sodium salt

positive reaction

pH

5.5 - 7.5 ( 1.0 g /20 ml)

Purity

solution clarity

clear ( 2.5 g /50 ml)

chloride

no more than 0.106 %

sulfate

no more than 0.480 %

heavy metal

no more than 20 PPM

arsenic salt

no more than 2 PPM

sulphur content

15.0%-20.0 %

loss on drying

no more than 10.0 %

dextranum molecular weight

35,000-45,000