Hot sell high Quality Hydroxyethyl Starch

Item tested

Standard

Test result

Appearance:

White or light yellow granular or powder. No strange odor, Easily dissolved in water. Undissolved in ethanol,acetone and isopropyl alcohol.

conforms

Specific rotation

+187°-- +193°

   188°

Identification

(1)    should be positive

(2)    Infrared absorption spectrum consistent with the reference standard

   positive

   conforms

Acidity

PH: 5.0 -- 7.0

   6.2

Clarity and color

Should be clear. If turbid appears , should not overpass No.2 turbidity liqor. If color appears, test absorption at 400nm(not over 0.05)

conforms

Intrinsic viscosity

13.0 – 17.0

   15.5

2-chloroethanol

< 0.0005%

   0

epoxyethane

<0.001%

   0

Sodium chloride

<0.6%

   0.1

Loss on drying

<5.0%

   3.3%

Heavy Metal

<10ppm

   <10ppm

Mw

and its distribution

Mw: 110,000—150,000.

For 10% small molecular, Mw >15000

For 10% large molecular, Mw<380,000

143800

30000

312300

MS

0.38—0.45 calculated in DS and choloride free

0.39

Endotoxin

< 10EU/g

conforms

Abnormal toxicity

Conforms the spec.

conforms

Microbial limit

Bacterial : <100cfu/g

conforms

Assay:

Calculated in DS and deduct sdium chloride content, The hydroxyethyl starch 130/0.4 : > 98.5%

98.9%

Shelf life:

24 months from manufacture date

Date of report: