CAS number
CAS 121-57-3 Sulphanilic acid
CAS 121-57-3 · CAS 515-74-2 · EC 204-482-5 · EC 208-208-5 · Index No 612-014-00-X
Where CAS 121-57-3 appears: every table entry that prints it among its identifiers, in the newest version of each act this record holds, and every recorded change to those entries. Many entries name a group of substances and print no number, so absence here is not absence from the law. Not legal advice.
Where it appears now
CLP Annex VI section 3, Index No 612-014-00-X
No change to this entry since the first version the record holds, in force 1 December 2010. · Annex VI on this site
| Index No | Chemical name | EC No | CAS No | Classification | Labelling | Specific Conc. Limits, M-factors and ATEs | Notes | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Hazard Class and Category Code(s) | Hazard statement Code(s) | Pictogram, Signal Word Code(s) | Hazard statement Code(s) | Suppl. Hazard statement Code(s) | ||||||
| 612-014-00-X | sulphanilic acid; 4-aminobenzenesulphonic acid | 204-482-5 | 121-57-3 | Eye Irrit. 2 Skin Irrit. 2 Skin Sens. 1 | H319 H315 H317 | GHS07 Wng | H319 H315 H317 | |||
CLP Annex VI section 3, table 2, Index No 612-014-00-X
No change to this entry since the first version the record holds, in force 1 December 2010. · Annex VI on this site
| Index No | International Chemical Identification | EC No | CAS No | Classification | Labelling | Concentration Limits | Notes |
|---|---|---|---|---|---|---|---|
| 612-014-00-X | sulphanilic acid; 4-aminobenzenesulphonic acid | 204-482-5 | 121-57-3 | Xi; R36/38 R43 | Xi R: 36/38-43 S: (2-)24-37 |
Cosmetics Regulation Annex II, Reference number 1257
No change to this entry since the first version the record holds, in force 11 July 2013. · Annex II on this site
| Reference number | Substance identification | ||
|---|---|---|---|
| Chemical name/INN | CAS number | EC number | |
| a | b | c | d |
| 1257 | 4-Aminobenzenesulfonic acid (Sulfanilic acid) and its salts, when used as a substance in hair dye products | 121-57-3/515-74-2 | 204-482-5/208-208-5 |
REACH Annex XVII appendix 13, CAS No 121-57-3
Last changed in the version in force , by Regulation (EU) 2020/2081 and 3 others, the acts that change names · Annex XVII on this site
| Substance name | EC No | CAS No | Concentration limit (by weight) |
|---|---|---|---|
| Sulphanilic acid | 204-482-5 | 121-57-3 | 0,0005 % |
Look up a number
Type a CAS or EC number, with or without its hyphens, or an Index No into the search box at the top of the page: it reads 50000 as CAS 50-00-0. Every number is also listed by act on the substances page.
Its history
· added · REACH Annex XVII appendix 13, CAS No 121-57-3
Recorded in the version in force , by Regulation (EU) 2020/2081 and 3 others, the acts that change names. The change on its version page
| Identifiers | Substance name | EC No | CAS No | Concentration limit (by weight) |
|---|---|---|---|---|
| CAS No 121-57-3CAS 121-57-3EC 204-482-5 | Sulphanilic acid | 204-482-5 | 121-57-3 | 0,0005 % |
Sources
- CLP: every version the record holds; rows read from EUR-Lex consolidated version 02008R1272-20270101, in force 1 January 2027 (external, EUR-Lex)
- Cosmetics Regulation: every version the record holds; rows read from EUR-Lex consolidated version 02009R1223-20260518, in force 18 May 2026 (external, EUR-Lex)
- REACH: every version the record holds; rows read from EUR-Lex consolidated version 02006R1907-20260622, detected 11 September 2026 (external, EUR-Lex)