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喜樹堿 黃體酮 噻菌靈/噻苯咪唑 硫酸新霉素 紅霉素
Certificate of Analysis
Product Name
Dithranol (Cas No:1143-38-0)
Batch No.
20231015
Quantity
1.0kgs
M. Date
Oct, 2023
Exp. Date
Sep, 2026
Test
Specification
Results
Description
Yellow to brownish-yellow crystalline powder
Complies
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
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
Loss on drying
NMT 0.5%
0.379%
Sulfated ash
NMT 0.1%
0.09%
Chlorides
NMT 100ppm
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 2.5%
NMT 3.0%
0.001%
0.472%
Not detected
0.473%
Assay (On dried basis)
98.5-101.0%%
99.77%
Conclusion:
Complies with the In-house standard
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