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Cleanchem is a trusted provider of premium pharmaceutical reference materials, specializing in Dapsone and its associated compounds. Our catalog includes pharmacopeial and non-pharmacopeial Dapsone impurities, metabolites, nitrosamine derivatives (N-NO compounds), and stable isotope-labeled products. These reference standards play a critical role in pharmaceutical R&D, supporting activities such as product formulation, ANDA and DMF submissions, quality assurance, analytical method development, and stability assessments.
All Dapsone-related substances undergo comprehensive characterization and are delivered with complete Certificates of Analysis and supporting analytical documentation to ensure regulatory adherence. Upon request, we can offer EP/USP traceable standards. Our products are routinely re-evaluated to maintain consistent quality and performance.

Dapsone

CAT No: CL-DPN-01 CAS No: 80-08-0 Mol Wt: 248.3 Mol F: C12H12N2O2S Inv Status: In Stock

Chemical Name: 4,4'-Sulfonyldianiline ; Avlosulfon ; Croysulfone ; Diphenasone ; Disulone ; Dumitone ; Eporal ; Novophone ; Sulphadione ; 4,4

Dapsone Hydroxylamine

CAT No: CL-DPN-02 CAS No: 32695-27-5 Mol Wt: 264.3 Mol F: C12H12N2O3S Inv Status: In Stock

Chemical Name: 4-((4-(hydroxyamino)phenyl)sulfonyl)aniline ; N-Hydroxy-4,4

Dapsone Monoacetyl Impurity

CAT No: CL-DPN-03 CAS No: 565-20-8 Mol Wt: 290.3 Mol F: C14H14N2O3S Inv Status: In Stock

Chemical Name: N-(4-((4-Aminophenyl)sulfonyl)phenyl)acetamide

Dapsone Dimer Impurity

CAT No: CL-DPN-04 CAS No: NA Mol Wt: 494.6 Mol F: C24H22N4O4S2 Inv Status: In Stock

Chemical Name: 4,4'-(Hydrazine-1,2-diylbis(4,1-phenylenesulfonyl))dianiline

Dapsone Impurity 1

CAT No: CL-DPN-05 CAS No: 80-00-2 Mol Wt: 252.7 Mol F: C12H9ClO2S Inv Status: Custom Synthesis

Chemical Name: 1-Chloro-4-(phenylsulfonyl)benzene ; 4-Chlorodiphenyl Sulfone ; 4-Chlorophenyl Phenyl Sulfone ; Sulfenon; Sulphenone; p-Chlorodiphenyl Sulfone ; p-Chlorophenyl Phenyl Sulfone

Dapsone Impurity 2

CAT No: CL-DPN-06 CAS No: 7146-68-1 Mol Wt: 267.7 Mol F: C12H10ClNO2S Inv Status: Custom Synthesis

Chemical Name: Dapsone Aniline Chlorophenyl Impurity ; Dapsone Impurity B ; 4-((4-chlorophenyl)sulfonyl)aniline ; 4-[(4-Chlorophenyl)sulfonyl]benzenamine ; 4-Aminophenyl 4-chlorophenyl Sulfone ; p-Aminophenyl p-Chlorophenyl Sulfone

Dapsone Impurity 3

CAT No: CL-DPN-07 CAS No: 25963-47-7 Mol Wt: 249.3 Mol F: C12H11NO3S Inv Status: Custom Synthesis

Chemical Name: Dapsone Impurity C ; 4-((4-aminophenyl)sulfonyl)phenol ; 4-Amino-4

Dapsone Impurity 4

CAT No: CL-DPN-08 CAS No: (7019-01-4) Mol Wt: 233.3 Mol F: C12H11NO2S Inv Status: Custom Synthesis

Chemical Name: 4-(phenylsulfonyl)aniline

Dapsone Impurity 5

CAT No: CL-DPN-09 CAS No: 27147-69-9 Mol Wt: 248.3 Mol F: C12H12N2O2S Inv Status: Custom Synthesis

Chemical Name: 2-((4-Aminophenyl)sulfonyl)aniline ; 2,4

Dapsone Impurity 6

CAT No: CL-DPN-10 CAS No: 54616-64-7 Mol Wt: 480.6 Mol F: C24H20N2O5S2 Inv Status: Custom Synthesis

Chemical Name: 4,4'-(Oxybis(4,1-phenylenesulfonyl))dianiline ; O-Dimer of Dapsone ; 4,4

Dapsone Impurity 7

CAT No: CL-DPN-11 CAS No: 22100-66-9 Mol Wt: 276.3 Mol F: C12H8N2O4S Inv Status: In Stock

Chemical Name: 2,2?Dinitrodiphenyl Sulfide

Dapsone Impurity 8

CAT No: CL-DPN-12 CAS No: 14665-52-2 Mol Wt: 308.3 Mol F: C12H8N2O6S Inv Status: Custom Synthesis

Chemical Name: 2,2'-Sulfonylbis(nitrobenzene) ; 2,2

Dapsone Impurity 9

CAT No: CL-DPN-13 CAS No: 53347-49-2 Mol Wt: 248.3 Mol F: C12H12N2O2S Inv Status: Custom Synthesis

Chemical Name: 2,2'-Sulfonyldianiline

Dapsone Impurity 10

CAT No: CL-DPN-14 CAS No: 116435-84-8 Mol Wt: 248.3 Mol F: C12H12N2O2S Inv Status: Custom Synthesis

Chemical Name: 4-(Phenylsulfonyl)-1,3-Benzenediamine

Dapsone Impurity 11

CAT No: CL-DPN-15 CAS No: 80-07-9 Mol Wt: 287.2 Mol F: C12H8Cl2O2S Inv Status: Custom Synthesis

Chemical Name: 4,4'-Sulfonylbis(chlorobenzene)

Dapsone Impurity 12

CAT No: CL-DPN-16 CAS No: 80-09-1 Mol Wt: 250.3 Mol F: C12H10O4S Inv Status: In Stock

Chemical Name: 9-Oxo Ketotifen4,4'-sulfonyldiphenol

Dapsone Impurity 13

CAT No: CL-DPN-17 CAS No: 599-61-1 Mol Wt: 248.3 Mol F: C12H12N2O2S Inv Status: Custom Synthesis

Chemical Name: 3,3'Diaminodiphenyl sulfone

Dapsone Impurity 14

CAT No: CL-DPN-18 CAS No: 53347-49-2 Mol Wt: 248.3 Mol F: C12H12N2O2S Inv Status: Custom Synthesis

Chemical Name: 2,2'Diaminodiphenyl sulfone

Dapsone Impurity 15

CAT No: CL-DPN-19 CAS No: 34262-32-3 Mol Wt: 248.3 Mol F: C12H12N2O2S Inv Status: Custom Synthesis

Chemical Name: 3-[(4-Aminophenyl)sulfonyl] benzenamine

Dapsone Impurity 16

CAT No: CL-DPN-20 CAS No: 148301-96-6 Mol Wt: 267.7 Mol F: C12H10ClNO2S Inv Status: Custom Synthesis

Chemical Name: 4-[(2-Chlorophenyl)sulfonyl] benzenamine

Dapsone Impurity 17

CAT No: CL-DPN-21 CAS No: 90309-26-5 Mol Wt: 267.7 Mol F: C12H10ClNO2S Inv Status: Custom Synthesis

Chemical Name: 4-[(3-Chlorophenyl)sulfonyl] benzenamine

Dapsone Impurity 18

CAT No: CL-DPN-22 CAS No: 23929-35-3 Mol Wt: 267.7 Mol F: C12H10ClNO2S Inv Status: Custom Synthesis

Chemical Name: 3-((4-chlorophenyl)sulfonyl) aniline

Dapsone Impurity 19

CAT No: CL-DPN-23 CAS No: NA Mol Wt: 479.6 Mol F: C24H21N3O4S2 Inv Status: Custom Synthesis

Chemical Name: Bis(4-((4-aminophenyl)sulfonyl)phenyl)amine , N - Dimer

Dapsone Impurity 20

CAT No: CL-DPN-24 CAS No: NA Mol Wt: 480.6 : 36.5 Mol F: C24H20N2O5S2 : HCl Inv Status: Custom Synthesis

Chemical Name: 4,4'-(Oxybis(4,1-phenylenesulfonyl))dianiline hydrochloride

Dapsone 4-Hydroxyamino Impurity

CAT No: CL-DPN-25 CAS No: 872811-58-8 Mol Wt: 265.3 Mol F: C12H11NO4S Inv Status: Custom Synthesis

Chemical Name: 4-((4-(Hydroxyamino)phenyl)sulfonyl)phenol

Dapsone D8

CAT No: CL-DPN-26 CAS No: 557794-38-4 Mol Wt: 256.4 Mol F: C12H4D8N2O2S Inv Status: Custom Synthesis

Chemical Name: 4,4'-Sulfonylbis(benzen-2,3,5,6-d4-amine)

Dapsone D4

CAT No: CL-DPN-27 CAS No: 1346602-12-7 Mol Wt: 252.3 Mol F: C12H8D4N2O2S Inv Status: Custom Synthesis

Chemical Name: 4-((4-Aminophenyl)sulfonyl)benzen-2,3,5,6-d4-amine

Dapsone Impurity 21

CAT No: CL-DPN-28 CAS No: 100-00-5 Mol Wt: 157.6 Mol F: C6H4ClNO2 Inv Status: Custom Synthesis

Chemical Name: 1-Chloro-4-nitrobenzene

Dapsone Impurity 22

CAT No: CL-DPN-29 CAS No: 64896-96-4 Mol Wt: 267.7 Mol F: C12H10ClNO2S Inv Status: Custom Synthesis

Chemical Name: 2-Chloro-4-(phenylsulfonyl)aniline

Dapsone Impurity 23

CAT No: CL-DPN-30 CAS No: 34262-29-8 Mol Wt: 248.3 Mol F: C12H12N2O2S Inv Status: Custom Synthesis

Chemical Name: 2-((3-Aminophenyl)sulfonyl)aniline

Dapsone Impurity 24

CAT No: CL-DPN-31 CAS No: 119-59-5 Mol Wt: 232.3 Mol F: C12H12N2OS Inv Status: Custom Synthesis

Chemical Name: 4,4'-Sulfinyldianiline

Dapsone Impurity 25

CAT No: CL-DPN-32 CAS No: 32631-31-5 Mol Wt: 267.7 Mol F: C12H10ClNO2S Inv Status: Custom Synthesis

Chemical Name: 3-Chloro-4-(phenylsulfonyl)aniline

N-Formyl Dapsone

CAT No: CL-DPN-33 CAS No: 21501-24-6 Mol Wt: 276.3 Mol F: C13H12N2O3S Inv Status: In Stock

Chemical Name: N-(4-((4-Aminophenyl)sulfonyl)phenyl)formamide

Dapsone Impurity 26

CAT No: CL-DPN-34 CAS No: 1156-50-9 Mol Wt: 308.3 Mol F: C12H8N2O6S Inv Status: In Stock

Chemical Name: 4,4'-Sulfonylbis(nitrobenzene)

Dapsone Impurity 27

CAT No: CL-DPN-35 CAS No: 35040-11-0 Mol Wt: 262.3 Mol F: C12H10N2O3S Inv Status: Custom Synthesis

Chemical Name: 4-((4-Nitrosophenyl)sulfonyl)aniline

Dapsone Impurity 28

CAT No: CL-DPN-36 CAS No: 5461-23-4 Mol Wt: 262.3 Mol F: C12H10N2O3S Inv Status: Custom Synthesis

Chemical Name: 4-((4-Nitrophenyl)sulfinyl)aniline

Dapsone Azoxy Dimer

CAT No: CL-DPN-37 CAS No: 35040-12-1 Mol Wt: 508.6 Mol F: C24H20N4O5S2 Inv Status: Custom Synthesis

Chemical Name: (Z)-1,2-bis(4-((4-Aminophenyl)sulfonyl)phenyl)diazene 1-oxide

Dapsone Hydroxylamine D4

CAT No: CL-DPN-39 CAS No: 1330185-26-6 Mol Wt: 268.3 Mol F: C12H8D4N2O3S Inv Status: Custom Synthesis

Chemical Name: 4-((4-(Hydroxyamino)phenyl)sulfonyl)benzen-2,3,5,6-d4-amine

N-Acetyl Dapsone D4

CAT No: CL-DPN-40 CAS No: 2070015-08-4 Mol Wt: 294.4 Mol F: C14H10D4N2O3S Inv Status: Custom Synthesis

Chemical Name: N-(4-((4-Aminophenyl-2,3,5,6-d4)sulfonyl)phenyl)acetamide

Dapsone Impurity 29

CAT No: CL-DPN-41 CAS No: 1948-92-1 Mol Wt: 278.28 Mol F: C12H10N2O4S Inv Status: In Stock

Chemical Name: 4-Nitro-4?-aminodiphenyl Sulfone

Dapsone Impurity 30

CAT No: CL-DPN-42 CAS No: 13343-26-5 Mol Wt: 220.71 Mol F: C12H9ClS Inv Status: In Stock

Chemical Name: 4-Chlorodiphenyl Sulfide

Dapsone Impurity 31

CAT No: CL-DPN-43 CAS No: 6784-25-4 Mol Wt: 304.32 Mol F: C14H12N2O4S Inv Status: In Stock

Chemical Name: N,N'-(Sulfonylbis(4,1-phenylene))diformamide

Dapsone Impurity 32

CAT No: CL-DPN-44 CAS No: 77-46-3 Mol Wt: 332.4 Mol F: C16H16N2O4S Inv Status: In Stock

Chemical Name: N-[4-(4-acetamidophenyl)sulfonylphenyl]acetamide

Dapsone Impurity 33

CAT No: CL-DPN-45 CAS No: 1223-31-0 Mol Wt: 276.27 Mol F: C12H8N2O4S Inv Status: In Stock

Chemical Name: Bis(4-nitrophenyl) Sulfide

Dapsone Impurity 34

CAT No: CL-DPN-46 CAS No: 121-63-1 Mol Wt: 367.21 Mol F: C12H8Cl2O5S2 Inv Status: In Stock

Chemical Name: Bis(4-chlorosulfonylphenyl) Ether

Dapsone EP Impurity B

CAT No: CL-DPN-47 CAS No: 4/1/2019 Mol Wt: 233.3 Mol F: C12H11NO2S Inv Status: Custom Synthesis

Chemical Name: 4-(phenylsulfonyl)aniline

Dapsone EP Impurity E

CAT No: CL-DPN-48 CAS No: 7146-68-1 Mol Wt: 267.7 Mol F: C12H10ClNO2S Inv Status: Custom Synthesis

Chemical Name: 4-((4-chlorophenyl)sulfonyl)aniline

Dapsone EP Impurity A

CAT No: CL-DPN-49 CAS No: 25963-47-7 Mol Wt: 249.3 Mol F: C12H11NO3S Inv Status: Custom Synthesis

Chemical Name: 4-((4-aminophenyl)sulfonyl)phenol

Dapsone EP Impurity D

CAT No: CL-DPN-50 CAS No: 27147-69-9 Mol Wt: 248.3 Mol F: C12H12N2O2S Inv Status: Custom Synthesis

Chemical Name: 2-((4-Aminophenyl)sulfonyl)aniline

Dapsone EP Impurity F

CAT No: CL-DPN-51 CAS No: 80-00-2 Mol Wt: 252.7 Mol F: C12H9ClO2S Inv Status: Custom Synthesis

Chemical Name: 1-Chloro-4-(phenylsulfonyl)benzene

Type:Impurity Reference Standard

Total Products: 50

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