Glycerin
1 , Industrial Glycerin
Standard:GB/T13206-1991, Technical index:
Item |
Index |
Top-grade |
Second grade |
Appearance |
transparent without suspended substance |
transparent without suspended substance |
Odor |
without unpleasant odor |
without unpleasant odor |
Color, Hazen ≤ |
20 |
70 |
Glycerin , % ≥ |
98.5 |
95.0 |
Density(20 °C), g/ml ≥ |
1.2572 |
1.2481 |
Chloride (as Cl), % ≤ |
0.001 |
- |
Sulfatizing ash , % ≤ |
0.01 |
0.05 |
Acidity or Alkalinity, mmol/100g ≤ |
0.064 |
0.30 |
Saponification equivalent , mmol/100g ≤ |
0.64 |
3.0 |
As(as As), mg/kg ≤ |
2 |
- |
Heavy metals (as Pb), mg/kg ≤ |
5 |
- |
Reductive matter |
no precipitation or silver mirror |
- |
2 , Pharmaceutical Glycerin
Standard:CP 2000 volume 2, Technical index:
Item |
Index |
[ Properties ] |
|
Appearance |
colorless clear syrup-like liquid , Aq. solution (1→10) is neutral reaction |
Relative Density |
In 25°C, is not less than 1.2569 |
[ Identification ] |
|
(1) |
positive reaction |
(2) |
its infrared absorption spectrum is accordance with the standard sample. |
[ Check ] |
|
Color |
is not darker than the standard |
Chloride |
is not darker than the standard (0.0015%) |
Sulfate |
is not darker than the standard (0.002%) |
Fatty acid and ester |
The consumption of NaOH solution (0.1mol/l)is not more than 4.0ml |
Acrolein, dextrose & ammonium salt |
no yellow or with ammonia odor |
Readily carbonizable substance |
is not darker than the standard |
Residue on ignition |
not more than 2mg |
Iron salts |
is not darker than the standard (0.0002%) |
Heavy metals |
not more than ppm |
[ Assay test ] |
C3H8O3 is not less than 95.0% |
|
