CAS number
CAS 103-33-3 azobenzene
CAS 103-33-3 · EC 203-102-5 · Index No 611-001-00-6
Where CAS 103-33-3 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 611-001-00-6
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) | ||||||
| 611-001-00-6 | azobenzene | 203-102-5 | 103-33-3 | Carc. 1B Muta. 2 Acute Tox. 4 * Acute Tox. 4 * STOT RE 2 * Aquatic Acute 1 Aquatic Chronic 1 | H350 H341 H332 H302 H373 ** H400 H410 | GHS08 GHS07 GHS09 Dgr | H350 H341 H332 H302 H373 ** H410 | |||
CLP Annex VI section 3, table 2, Index No 611-001-00-6
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 |
|---|---|---|---|---|---|---|---|
| 611-001-00-6 | azobenzene | 203-102-5 | 103-33-3 | Carc. Cat. 2; R45 Muta. Cat. 3; R68 Xn; R20/22-48/22 N; R50-53 | T; N R: 45-20/22-48/22-68-50/53 S: 53-45-60-61 | E |
Cosmetics Regulation Annex II, Reference number 727
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 |
| 727 | Azobenzene | 103-33-3 | 203-102-5 |
REACH Annex XVII appendix 2, Index No 611-001-00-6
No change to this entry since the first version the record holds, in force 12 October 2008. · Annex XVII on this site
| Substances | Index No | EC No | CAS No | Notes |
|---|---|---|---|---|
| Azobenzene | 611-001-00-6 | 203-102-5 | 103-33-3 | E |
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
No change to this entry since the first version the record holds, in force 1 December 2010.
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)