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Certificate of Analysis
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Product Name |
Dithranol (Cas No:1143-38-0) |
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Batch No. |
20221015 |
Quantity |
1.0kgs |
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M. Date |
Oct, 2022 |
Exp. Date |
Sep, 2025 |
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Test |
Specification |
Results |
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Description |
Yellow to brownish-yellow crystalline powder |
Complies |
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Solubility |
Practically insoluble in water, soluble in methylene chloride, sparingly soluble in acetone, slightly soluble in ethanol(96%). It dissolves in dilute solutions of alkali- -hydroxides |
Complies |
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Identification |
obtained in the test solution is similar in position, colour and size to the principal spot in the chromatogram obtained with reference solution on(a)
solution shows a blue fluorescence |
Complies |
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Loss on drying |
NMT 0.5% |
0.379% |
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Sulfated ash |
NMT 0.1% |
0.09% |
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Chlorides |
NMT 100ppm |
Complies |
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Related substances Test-A: Impurity A(Anthrone) Impurity B(Dantron) Impurity C(Dithranol Dimer) Test-B: Impurity D (1-Hydroxy-9-anthron) Total (Test A+Test B) |
NMT 1.0% NMT 1.0% NMT 1.0% NMT 2.5% NMT 3.0% |
0.001% 0.472% Not detected Not detected 0.473% |
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Assay (On dried basis) |
98.5-101.0%% |
99.77% |
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Conclusion: |
Complies with the In-house standard |
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