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Promethazine HCl

CAS No. 58-33-3

Chemical Formula : C17H21ClN2S

STD No. 651P
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Promethazine Impurity 1(Promethazine EP Impurity A)

CAS No. 92-84-2

Chemical Formula : C12H9NS

STD No. 6511P
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Promethazine Impurity 2(Promethazine EP Impurity B)

CAS No. 5568-90-1

Chemical Formula : C17H21ClN2S

STD No. 6512P
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Promethazine Impurity 3(Promethazine EP Impurity C)

CAS No. 60113-77-1

Chemical Formula : C16H19ClN2S

STD No. 6513P
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Promethazine Impurity 4(Promethazine EP Impurity D)

CAS No. 7640-51-9

Chemical Formula : C17H20N2OS

STD No. 6514P
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