|
TEST |
USP |
BP |
|
CHARACTERS |
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A white or almost white, crystalline powder, practically insoluble in water, very soluble in alcohol and in methylene chloride, freely soluble in ether. |
|
CLARITY OF SOLUTION
|
Dissolve 25 g in 100 mL of alcohol: the solution does not develop a haze within 24 hours
|
hygroscopic, sparingly soluble in water, freely soluble in alcohol and in methylene chloride
|
IDENTIFICATION
MELTING POINT
IR
TEST C
TEST D
TEST E
|
66°C to 69°C.
Infra red spectrum is concordant with the infra red spectrum of the reference standard.
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A bright green colour develops and a fine precipitate is formed
------
|
66°C to 70°C.
Infra red spectrum is concordant with the infra red spectrum of the reference standard.
Precipitate, in picric acid solution , melts at about 230°C, with decomposition
A green colour is produced with fuming nitric acid R and alcoholic potassium hydroxide solution R
Bluish-green precipitate is formed in solution of cobalt nitrate R
|
|
APPEARANCE OF SOLUTION |
------ |
The solution is clear and colourless. |
|
2,6 DIMETHYLANILINE |
------ |
NMT 100 ppm. |
|
CHLORIDES
|
NMT 0.0035%. |
NMT 35 ppm.
|
|
SULPHATES
|
No more turbidity than std |
NMT 0.1 per cent. |
|
HEAVY METALS |
The limit is 0.002%. |
NMT 10 ppm |
|
WATER |
----- |
Not more than 1.0 per cent |
|
SULPHATED ASH |
----- |
Not more than 0.1 per cent, determined on 1.0 g. |
|
RESIDUE ON IGNITION |
Not more than 0.1 per cent |
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|
ASSAY |
97.50 % to 102.5% w/w |
99.0% to 101.0 %w/w |
