Test | Specifications | Result |
Appearance | Almost white crystalline powder | white crystalline powder |
Identification (1)iodine (2)color |
1)flame decomposes andlibetates iodine vapors 2)add solution,a pink colour peoduced |
1)Pass 2)Pass |
Solubility | 1)Very Slightly Soluble in Water 2)Soluble in Solutions of Alkali hydeoxides and in hot solutions of Alkli Carbonates 3)Slightly Soluble in Alcohol 4)Insoluble in Acetone,Chloroform and in Ether |
1)Pass 2)Pass 3)Pass 4)Pass |
Specific optical rotation | -5°~-6° (Sol 3.0% mixture from NaOH 1N/Ethanol 1:2) |
-5.8° |
Loss on drying | ≤11.0% | 9.60% |
Liothyronine | ≤2.0% | 0.8% |
Iodide | ≤0.08% | 0.06% |
Assay | 97.0%~103.0% | 98.6% |
Conclusion | Conforms to USP30 |