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Intermediates

Sr. No. Chemical Name Trade Name M.W. CAS No. Structure
1 Ortho Nitro Chloro Benzene-4-Sulfonic Acid ONCBSA 237.5 17691-19-9
2 Ortho Amino Phenol-4-Sulfonic Acid OAPSA 189 98-37-3
3 Ortho Nitro Chloro Benzene-4-Sulfonic Acid ONCBSA 237.5 17691-19-9
4 6-Acetyl Amino-2-Amino Phenol-4-sulfonic Acid (AAPS) (ACLAP) (6 Acetyl OAPSA) 246 40306-75-0
5 4-Nitro-2-Amino Phenol-6-Sulfonic Acid 4 NAPSA 234 96-67-3
6 Para Nitro Chloro Benzene Ortho Sulfonic Acid PNCBOSA 237.5 946-30-5
7 4’-Amino-4-Nitro Diphenylamine-2-Sulfonic Acid 4 NADPSA 309 91-29-2
8 4,4’-Diamino Diphenylamine-2-Sulfonic Acid (Para Para Acid)(F.C.Acid) 279 119-70-0
9 4,4’-Diamino Benzene Sulfanilide 4-4 DASA 263 16803-97-7
10 4-Amino Diphenylamine-2-Sulfonic Acid 4 ADAPSA 264 91-30-5
11 Para Amino Azo Benzene-4-Sulfonic Acid (PAAB4SA) (PASS) 277 102-23-8
12 4-Nitro-2-Amino Phenol 4-NAP 154 99-57-0
13 4-Chloro-2-Amino Phenol 4 CAP 143.5 95-85-2
14 4-Chloro-2-Amino Phenol-6-Sulfonic Acid 4 CAPSA 223.5 88-23-3
15 6-Chloro-2-Amino Phenol-4-Sulfonic Acid 6 CAPSA 223.5 5857-94-3
16 Aniline-2,4-Disulfonic Acid Aniline-2,4-Disulfonic Acid 253.2 137-51-9
17 Aniline-2,5-Disulfonic Acid Aniline-2,5-Disulfonic Acid 223.5 98-44-2
18 4,4’-Biphenyl Diamino-2,2’-Disulfonic Acid (Benzedine-Disulfonic Acid) (BDSA) 151 117-61-3
19 Meta Uriedo Aniline MUA 188 56690-88-9
20 Sulfo VS (Sulphonic Para Base Ester) Aniline-4-B-Ethyl Sulfonyl Sulphate-2-Sulfonic Acid Sulfo VS 361 42986-22-1
21 (Ethyl Benzyl Aniline Meta Sulfonic Acid) EBAMSA 291 101-11-1
22 Meta Phenylene Diamine-4-Sulfonic Acid MPDSA 268 88-63-1
23 Acetyl MPDSA Acetyl MPDSA 230 88-64-2
24 Para Amino Azo Benzene-3,4’-Disulfonic Acid (PAAB3,4DSA) 357 101-50-8
25 Metanilic Acid(1 Amino Benzene 3, Sulphonic Acid Metanilic Acid 173.19 121-47-1
26 Para Phenylene Diamine-2,5-Disulfonic Acid PPDDSA 268 7139-89-1
27 2,5-Dichloro Aniline-4-Sulfonic Acid 2,5 DCSA 242 41295-98-1
28 2-Amino Phenol-4-Sulphonamide (3-Amino-4-Hydroxy Benzene Sulphonamide (OPSAMIDE) 188 98-32-8
29 2-Amino Phenol-N-Methyl-4-Sulphonamide (3-Amino-4-Hydroxy-NMethyl Benzene Sulphonamide) (Methyl OPSAMIDE) 202 80-23-9
30 2-Amino Phenol-4-Sulfanilide (Aniline OPSAMIDE) 264 80-20-6
31 2-Amino Phenol-4-Sulphonamide-2’-Carboxy Phenyl amide (Anthranilic OPSAMIDE) 308 91-35-0
32 2-Naphthol-6-Sulfonic Acid (Sodium / Potassium Salt) Schaeffer’s Acid 224 93-01-6
33 2-Naphthylamine-6-Sulfonic Acid Broenner’s Acid 223 93-00-5
34 1,3-Naphthalenedisulfonic Acid, 7-Amino- Amino G Acid 303 86-65-7
35 2-Naphthylamine-1,5-Disulfonic Acid Sulfotobias Acid 303 117-62-4
36 2-Naphthylamine–5-Sulfonic Acid Dahl’s Acid 223 81-05-0
37 2-Naphthylamine-3,6,8-Trisulfonic Acid Indian K Acid 383 118-03-6
38 7-Amino-1-Naphthol-3,6-Disulphonic Acid Sulfo Gamma Acid 319 90-40-4
39 2-Naphthol-6,8-Disulfonic Acid G Salt 380 842-18-2
40 2-Naphthol-3,6-Disulfonic Acid R Salt 135-51-3
41 2-Naphthylamine-3,6-Disulfonic Acid Amino R – Acid 303 92-28-4
42 O – Nitro phenol – p – Sulfonic acid(Sodium / Potassium Salt) ONPSA 219 616-85-3
43 O-Nitro Toluene-P-Sulfonic Acid ONT4SA 217 97-06-3
44 P-Nitro Toluene-O-Sulfonic Acid PNTOSA 217 121-03-9
45 o-nitro,1-chloro benzene – p – sulfonic acid OCPSA 237 121-18-6
46 2-Hydroxy Benzoic Acid, 5-Sulfo 5-sulfo salicylic acid 218 97-05-2
47 2-amino toluene-4-sulfonic acid OATSA 187 98-33-9
48 2-chloro aniline-4-sulfonic acid OCASA 207 98-35-1
49 P-anisidine-3-sulfonic acid PAMSA 203 13244-33-2
50 2,5-dichloro aniline-4-sulfonic acid 2,5DCA-4SA 242 88-50-6
51 2-Amino phenol-4-Sulfonicacid OPSA 189 98-37-3
52 2-Chloroaniline-5-Sulfonicacid(Sodium / Potassium Salt) OCA4SA 207 98-36-2
53 2-Aminotoluene-5-Sulfonicacid ONT5SA 187.22 98-33-9/98-42-0
54 P-flouro nitro benzene 3-sulfonic acid PFNBSA
55 P-nitro aniline-o-sulfonic acid PNAOSA 218 30693-53-9/96-75-3
56 2:8-Dihydroxy Naphthalene, 6- Sulfonic Acid Dioxy G Acid 224 93-01-6
57 O-Nitro benzene sulfonylchloride ONBSC 221 1694-92-4
58 2-Naphthylamine,5-Hydroxy-1,7-Disulfonic Acid Sulfo J-acid 319 6535-70-2
59 2-naphthylamine-8-sulfonic acid Crocein Acid 223 86-60-2
60 2-(n-Methylamino).5-Hydroxy Naphthalene-7-Sulfonic Acid n-methyl J –acid 253 22346-43-6
61 2-Naphthylamine,8-Hydroxy, 6-Sulfonic Acid Gamma acid 239 90-51-7
62 4-Flouroaniline-3-sulfonic acid PFAMSA 38962-61-7