CHANGZHOU HIGHASSAY® CHEMICAL CO., LTD

Name

Hydroxyethyl starch

Specification

HES 130/0.4;

HES 200/0.5;

HES 480/0.7;

CAS Registry Number

Items

130/0.4

200/0.5

Description

White or almost white powder

White or almost white powder

Specifically

+ 182.0° ~  + 192.0°

+ 183.0° ~  + 191.0°

Identification

Positive

Conform to chromatogram

Positive

Conform to chromatogram

PH

5.0-7.0

4.5-6.5

Transparency and color of the solution

Absorbency at 450nm <0.015

Turbidity no dark than 1#

Absorbency at 450nm <0.015

Turbidity no dark than 1#

Inherent viscosity

13.0-17.0

15.0-19.0

Heavy metals

5ppm max

5ppm max

Loss on drying

5.0% max

5.0% max

Sodium chloride

0.5% max

0.5% max

Molar substitution level(MS)

0.38 to 0.45

0.43 to 0.55

Ethylene glycol

0.062% max

0.062% max

2-chloroethene

0.002% max

0.002% max

Molecular weight MW

110000 to 150000

190000 to 250000

MW 10%

400000 max

780000 max

MW 90%

15000 min

15000 min

Bacterial endotoxins

2.5EU/g max

2.5EU/g max

Microbial pollution

Yeast and Mould <10

Yeast and Mould <10

Assay

98.0%min

98.5-101.5%