| Tests | | Specifications | | Reference |
| Description | | White powder,Slightly hygroscopic,Is odorless, and has a bitter taste
| | USP |
| | | | |
| Solubility | | Freely soluble in water; soluble in glycerin,
Practically insoluble in alcohol,in chloroform and in ether | | USP |
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| Identification | | | | USP |
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| A.Infrared Absorption
| | Shall pass the test | | USP |
| | | | |
| B.Tests for Calcium
| | Shall pass the test | | USP |
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| Specific rotation Between | | +25.0°and +27.5° | | USP |
| | | | |
| Alkalinity
| | Shall pass the test
| | USP |
| | | | |
| Loss on drying
| | Not more than 5.0 % | | USP |
| | | | |
| Heavy metals
| | Not more than 0.002 %
| | USP |
| | | | |
| Ordinary Impurities | | Not more than 1.0 % | | USP |
| | | | |
| Nitrogen content (On dried basis) | | 5.7 % - 6.0 % | | USP |
| | | | |
| Content of calcium(On dried basis) | | 8.2 % - 8.6 % | | USP |
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| Storage: | | Store in a well-closed container at a temperature not exceeding 25°C, protected from direct sunlight and
Moisture, unless otherwise specified.
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| Retest Period: | | 3 years from the date of manufacture. |
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