 |
Item | Specification |
Appearance | White or almost white crystals, having almost no odor |
Assay(hplc)(%) | 99.0min |
Identification | (1) triturate sample with an equal amount of Camphor; the mixture liquefies. |
(2) dissolve a small sample in 1ml of glacial Acetic acid, add 6 drops of sulfuric acid and 1 drop of nitric acid; a red-brown color develops. | |
(3) to 1g sample add 5ml of a solution of sodium Hydroxide (1→10) and heat on a water bath; a Colorless or light yellow liquid is Obtained. To this liquid add 2 to 3 drops of Chloroform, while warm, and shake; a Yellow-green color develops. | |
(4) the sample solution exhibits a maximum Absorbance at the wavelength at 279+2 nm. | |
Melting point | 110~113℃ |
Purity | (1) Clarity of solution dissolve 3.0g sample in 10ml of ethanol: The solution is clear (2) Organic impurities: Tlc (3) Heacy metal(pb)≤20ppm (4) Arsenic≤2ppm |
Item | Specification |
Appearance | White or almost white crystals, having almost no odor |
Assay(hplc)(%) | 99.0min |
Identification | (1) triturate sample with an equal amount of Camphor; the mixture liquefies. |
(2) dissolve a small sample in 1ml of glacial Acetic acid, add 6 drops of sulfuric acid and 1 drop of nitric acid; a red-brown color develops. | |
(3) to 1g sample add 5ml of a solution of sodium Hydroxide (1→10) and heat on a water bath; a Colorless or light yellow liquid is Obtained. To this liquid add 2 to 3 drops of Chloroform, while warm, and shake; a Yellow-green color develops. | |
(4) the sample solution exhibits a maximum Absorbance at the wavelength at 279+2 nm. | |
Melting point | 110~113℃ |
Purity | (1) Clarity of solution dissolve 3.0g sample in 10ml of ethanol: The solution is clear (2) Organic impurities: Tlc (3) Heacy metal(pb)≤20ppm (4) Arsenic≤2ppm |
