| ≥1 piece |
Specification
|
Item
|
Standard
|
Result
|
|
Identification
|
Positive
|
Complies
|
|
Melting point of °C
|
226-230
|
226.7-229.5
|
|
Appearance
|
White crystal
|
White crystal
|
|
Content %
|
99.0-101.0
|
99.32
|
|
Loss on drying %
|
≤15
|
13.46
|
|
Ammonium Salts
|
≤ 0.0025
|
0.001
|
|
Arsenic %
|
≤ 0.002
|
0.0001
|
|
Lead
|
≤ 1ppm
|
0.8
|
|
Benzoate and salicylate
|
No precipitate or violet color appears
|
Complies
|
|
Heavy metals
|
≤ 0.001
|
0.0005
|
|
Free acid or alkali
|
Complies with BP/USP/EP
|
Complies
|
|
Readily carbonizable substances
|
Not more intensely colored than reference
|
Complies
|
|
P-Toluene sulfonamide
|
≤ 10ppm
|
7ppm
|
|
O-Toluene sulfonamide
|
≤ 10ppm
|
6ppm
|
|
Selenium
|
≤ 30 ppm
|
6ppm
|
|
Related substance
|
Complies with BP/USP/EP
|
Without
|
|
Clarity and color of solution.
|
Colorless, clear
|
Colorless, clear
|
|
Organic volatiles
|
Complies with BP/USP/EP
|
Without
|
|
PH value
|
Complies with BP/USP/EP
|
6.5
|
|
Benzoic acid- sulfonamide
|
≤25ppm
|
10ppm
|