Pharmaceutical Standards

Pharmaceutical standards are guidelines and regulations that govern the quality and safety of pharmaceutical products and manufacturing processes.

4-(4-(4-Methoxyphenyl)piperazin-1-yl)aniline

CAS Number

74852-62-3

Itraconazole

4-(4-Chlorothiophen-2-yl)-5-(4-cyclohexylpiperazin-1-yl)thiazol-2-amine

CAS Number

570407-42-0

Chemical Primary Standard

4-(4-Chlorothiophen-2-yl)thiazol-2-amine

CAS Number

570407-10-2

Chemical Primary Standard

4-(5-Bromo-2-chlorobenzyl)phenol

CAS Number

864070-18-8

Chemical Primary Standard

4-(Difluoromethoxy)-2-nitroaniline

CAS Number

97963-76-3

Alternate CAS Number

Pantoprazole

4-(Difluoromethyl)aniline

CAS Number

49658-26-6

Alternate CAS Number

1980063-54-4(HCl Salt)

Teriflunomide

4-(difluoromethyl)aniline hydrochloride

CAS Number

1980063-54-4

Alternate CAS Number

49658-26-6(Freebase)

Teriflunomide

4-(Methylamino)butanoic Acid / NMBA Starting material

CAS Number

1119-48-8

Nitrosamine Impurities

4-Acetylbenzoic Acid

CAS Number

586-89-0

Chemical Primary Standard

4-Amino-2-(1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl)isoindoline-1,3-dione

CAS Number

253168-83-1

Apremilast

4-Amino-2-fluoro-N-methylbenzamide

CAS Number

915087-25-1

Chemical Primary Standard

4-Amino-2-Methoxy-5-(Methylsulfonyl)benzoic Acid

CAS Number

71675-99-5

Amisulpride

4-Amino-3-chlorophenol Hydrochloride

CAS Number

52671-64-4

Chemical Primary Standard

4-Amino-5-hydroxymethyl-2- methylpyrimidine Hydrochloride

CAS Number

13100-57-7

Chemical Primary Standard

4-Amino-N-methylbenzamide

CAS Number

6274-22-2

Chemical Primary Standard

4-Bromo-2-fluorobenzamide

CAS Number

292621-45-5

Chemical Primary Standard

4-bromo-2-[[cyclohexyl(methyl)amino]methyl]aniline

CAS Number

132004-28-5

Chemical Primary Standard

4-Chloro Bupropion

CAS Number

1193779-34-8

Bupropion

4-Chloro-1-methylpiperidine

CAS Number

5570-77-4

Chemical Primary Standard

4-Chloro-1-methylpiperidine hydrochloride

CAS Number

5382-23-0

Chemical Primary Standard

4-Chloro-2-(chloromethyl)-3-methoxypyridine

CAS Number

409098-85-7 (free base)

Alternate CAS Number

503058-51-3(HCl salt)

Pantoprazole

4-chloro-2H-phthalazin-1-one

CAS Number

2257-69-4

Chemical Primary Standard

4-Chloro-3-(1-(6,7-dihydrothieno[3,2-c]pyridin-5(4H)-yl)-2-methoxy-2-oxoethyl)benzenesulfonic Acid

CAS Number

2418591-19-0

Clopidogrel

4-chloro-3-nitrobenzenesulfonamide

CAS Number

97-09-6

Chemical Primary Standard

4-Chloro-6-ethyl-5-fluoropyrimidine

CAS Number

137234-74-3

Voriconazole

4-Chloro-7-((2-(trimethylsilyl)ethoxy)methyl)-7H-pyrrolo[2,3-d]pyrimidine

CAS Number

941685-26-3

Chemical Primary Standard

4-Chloro-7-methoxy-6-quinolinecarboxamide

CAS Number

417721-36-9

Chemical Primary Standard

4-Chlorobenzaldehyde

CAS Number

104-88-1

Chemical Primary Standard

4-Chlorobenzhydrol

CAS Number

119-56-2

Cetirizine

4-Chlorobenzophenone

CAS Number

134-85-0

Chemical Primary Standard

4-Chlorophenothiazine

CAS Number

7369-69-9

Chemical Primary Standard

4-Chloropropiophenone

CAS Number

6285-05-8

Chemical Primary Standard

4-Desethylamino 4-Oxobrinzolamide

CAS Number

154127-41-0

Brinzolamide

4-ethoxy-3-(morpholin-2-ylmethoxy)phenol

CAS Number

56305-63-6

Chemical Primary Standard

4-Fluorobenzaldehyde

CAS Number

459-57-4

Chemical Primary Standard

4-Hydroxy Apixaban

CAS Number

Apixaban

4-Hydroxy Clonidine

CAS Number

57101-48-1

Clonidine

4-Methyl-3-oxo-2-(2-oxo-1,2-diphenylethyl)-N-phenylpentanamide

CAS Number

444577-70-2

Atorvastatin

4-Methyl-7H-pyrrolo[2,3-d]pyrimidine

CAS Number

945950-37-8

Ruxolitinib

4-Methyl-7H-pyrrolo[2,3-d]pyrimidine.

CAS Number

945950-37-8

Chemical Primary Standard

4-Nitrobenzoyl Varenicline

CAS Number

1329651-19-5

Varenicline

4-NITROSOPIPERAZINE-1-ETHANOL

CAS Number

48121-20-6

Nitrosamine Impurities

4-Toluenesulfonylurea

CAS Number

1694-06-0

Alternate CAS Number

Gliclazide

4R-dihydrospectinomycin

CAS Number

28048-39-7

spectinomycin

5,6-Dichloronicotinic acid

CAS Number

41667-95-2

Chemical Primary Standard

5-((S)-1-(2-Chlorophenyl)-2-methoxy-2-oxoethyl)-4,5,6,7-tetrahydrothieno[3,2-c]pyridine 5-oxide

CAS Number

1319197-71-1

Clopidogrel

5-(1-(2-Chlorophenyl)-2-methoxy-2-oxoethyl)thieno[3,2-c]pyridin-5-ium bromide

CAS Number

1251822-13-5

Clopidogrel

5-(2-Bromoacetyl)-2-hydroxybenzamide

CAS Number

73866-23-6

Chemical Primary Standard

Pharmaceutical Standards

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