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| INTERMEDIATES
>>> 4-HYDROXY,
2-METHYL-2H-1,2-BENZOTHIAZINE CARBOXYLIC ACID METHYL ESTER-1,1-DIOXIDE(Intermediate
of Meloxicam/Piroxicam) |
| |
Chemical
Structure : |
|
| Molecular
Formula |
: |
C11H11NO5S |
| Molecular
Weight |
: |
269.0
|
| Appearance
|
: |
Off
white crystalline powder |
| Solubility |
: |
Soluble
in Chloroform |
| Melting
Range |
: |
160°C
-166°C |
Related
Substance
By TLC
By HPLC |
:
:
: |
No secondary spot is seen
Not more than 1.0 % w/w |
| Water
by KF |
: |
0.5%
max |
Residual
Solvent
By HS-GC
|
: |
| Methanol |
:
500 ppm max. |
| o-Xylene |
:
1000 ppm max. |
| DMF |
:
880 ppm max. |
|
| Assay(Dry
basis) |
: |
Not
less than 97% and not more than 101% |
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