|
TEST |
USP |
EP |
|
CHARACTERS |
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A white, crystalline powder, very soluble in water, freely soluble in alcohol |
|
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
TEST FOR CHLORIDES
|
74°C to 79°C
IR spectrum is concordant with the infrared spectrum of the reference standard.
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A bright green colour develops and a fine precipitate is formed
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It gives reaction of chlorides
|
74°C to 79°C
IR Spectrum concordant with the spectrum obtained with reference sample.
The precipitate, washed with water R and dried, melts at about 230°C.
A green colour is produced.
A bluish-green precipitate is formed.
It gives reaction of chlorides .
|
|
APPEARANCE OF SOLUTION |
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Solution S is clear and colourless . |
|
PH |
------ |
4.0 to 5.5. |
|
IMPURITY A
|
------ |
Not more than 100 ppm.
|
|
HEAVY METALS
|
NMT 0.002% |
Not more than 5 ppm. |
|
WATER |
5.0 % to 7.0 %w/w |
5.5 % to 7.0 %w/w |
|
SULPHATED ASH |
----- |
Not more than 0.1 per cent |
|
RESIDUE ON IGNITION |
Not more than 0.1 per cent |
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|
ASSAY |
97.5 % to 102.5 % w/w |
99.0 % to 101.0%w/w |
|
SULPHATES |
No more turbidity is produced than std. |
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