Specification :

SDF03: Sildenafil Aldehyde Impurity

2-Ethoxy-5-( 4-methyl-piperazin-1-yl-sulphonyl) -benzaldehyde

SDF04 : Sildenafil Amide Impurity

4-Amino-1-methyl-3-propylpyrazole-5-carboxamide
[ CAS # 139756-02-8]

SDF04HCl: Sildenafil Amide Impurity Hydrochloride

4-Amino-1-methyl-3-propylpyrazole-5-carboxamide Hydrochloride
[ CAS # 247584-10-7]

SDF05: Sildenafil Chloro Impurity

2-Ethoxybenzoyl chloride
[ CAS # 42926-52-3]

SDF06: Sildenafil Carboxamide Impurity

4-( 2-Ethoxybenzamido) -1-methyl-3-n-propylpyrazole-5-carboxamide
[ C AS # 139756-03-9]

SDF07: Sildenafil Lactam Impurity

5-( 2-ethoxyphenyl) -1-methyl-3-propyl-1, 6-dihydro-7H-pyrazole[ 4, 3-d ] pyrimidine-7-one
[ CAS # 139756-21-1]

SDF08: Sildenafil Chlorosulfonyl Impurity

5-( 5-chlorosulfonyl-2-ethoxyphenyl) -1-methyl-3-propyl-1, 6-dihydro- 7H-pyrazole[ 4, 3-d] pyrimidine-7-one
[ CAS # 139756-22-2]