| Guanosine(GR)
Brief introduction:
Commercial name:GR. English name:Guanosine. Products
of top grade are white crystalline powder or similar
to white crystalline powder,qualified products
are faint yellow crystalline powder or crystalline
grain.
This product, the material of which is ribonucleic
acid, is easily soluble in water, pyridine,insoluble
in alcohol.
This product is main material for producing Acyclovir,
ATC, GTP etc..
Physical constant:
| Molecular formula:C10H13H5O5 |
Relative molecular weight:283.24 |
Structural formula:
Technical indicators:
| Sequence
number |
Index
name |
Index |
| Biochemical
reagent grade |
Top grade
|
Qualified
products |
1 |
Appearance |
White crystalline powder |
White or similar to white crystalline
powder |
Faint yellow crystalline powder
or crystalline grain |
2 |
Authentication
|
Electrophoresis
position |
In accordance with |
In accordance with |
In accordance with |
| Ultraviolet absorbency
ratio |
λ250nm/λ260nm
|
0.90-0.98 |
0.90-0.98 |
- |
| λ280nm/λ260nm |
0.66-0.74 |
0.66-0.74 |
- |
3 |
Other nucleoside |
20μl no detection |
15μl no detection |
10μl no detection |
4 |
Drying loss ≤% |
1.0 |
3.0 |
5.0 |
5 |
Arsenic (base on As)≤% |
0.0001 |
0.0001 |
0.0001 |
6 |
Heavy metal(base on Pb)≤% |
0.001 |
0.001 |
0.001 |
7 |
Content |
UV method≥% |
98.0 |
98.0 |
95.0 |
| High pressure liquid chromatogram
method≥% |
- |
98.0 |
- |
| Electrophoresis ≥% |
- |
- |
90.0 |
8 |
Specific rotation (3% 0.1mol
sodium hydroxide) |
-60.5±2 |
- |
- |
Packaging:packed in cardboard drum
(with two layers of polyethylene film plastic
bag),NW:20kg
Storage:stored in draughty, dry and clean
place,shelf life: 3 years since the
production date.
|
