Dexpanthenol is the precursor of vitamin B5, so it is also called provitamin B5.
China H&Z® Dexpanthenol Factory
Benzocaine CAS:94-09-7
Benzocaine Chemical Properties
MF:C9H11NO2
MW:165.19
Melting point :88-90°C
Boiling point :172°C (12.7517 mmHg)
Density :1.17
Solubilityalcohol: soluble1 gm in 5 ml
Benzocaine Specification:
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Items |
Standards |
Analytical results |
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Appearance |
Small,White crystal or powder |
white crystal powder |
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Identification |
IR Identification |
IR should comply with the standard spectrum. |
Conform |
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HPLC Identification |
The retention time of the major peak of the sample solution corres ponds to that of the Standard solution,as obtained in the assay. |
Conform |
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Loss on drying |
≤0.5% |
0.01% |
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Residue on ignition |
≤0.1% |
0.01% |
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Chloride |
No turbidity is produced immediately. |
Conform |
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Related substance(HPLC) |
Aminobenzoic≤0.10% |
Not detected |
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Ethyl 4-nitrobenzoate≤0.10% |
Not detected |
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Any other unspecified impurity≤0.10% |
Not detected |
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Total impurities≤1.0% |
Not detected |
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Assay(HPLC) |
98.0-102.0% |
99.7% |
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Elemental Impurities |
Pd |
≤1ppm |
0.003ppm |
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V |
≤10ppm |
＜0.00021ppm |
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As |
≤1.5ppm |
＜0.00017ppm |
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Co |
≤5ppm |
＜0.00005ppm |
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Ni |
≤20ppm |
0.00063ppm |
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Cd |
≤0.5ppm |
0.00002ppm |
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Hg |
≤3ppm |
＜0.00006ppm |
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Pb |
≤0.5ppm |
＜0.0003ppm |
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Conclusion |
Conforms withUSP42. |
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