EC number
EC 421-170-6 5,6-dihydroxy-2,3-dihydro-1H-indolium…
CAS 29539-03-5 · CAS 138937-28-7 · EC 421-170-6 · Index No 613-304-00-9
Where EC 421-170-6 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 613-304-00-9
Last changed in the version in force , by Regulation (EC) No 790/2009, the act that change names · 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) | ||||||
| 613-304-00-9 | 5,6-dihydroxy-2,3-dihydro-1H-indolium bromide | 421-170-6 | 138937-28-7 | Acute Tox. 4 * Eye Dam. 1 | H302 H318 | GHS05 GHS07 Dgr | H302 H318 | |||
CLP Annex VI section 3, table 2, Index No 613-304-00-9
Last changed in the version in force , by Regulation (EC) No 790/2009, the act that change names · Annex VI on this site
| Index No | International Chemical Identification | EC No | CAS No | Classification | Labelling | Concentration Limits | Notes |
|---|---|---|---|---|---|---|---|
| 613-304-00-9 | 5,6-dihydroxy-2,3-dihydro-1H-indolium bromide | 421-170-6 | 138937-28-7 | Xn; R22 Xi; R41 | Xn R: 22-41 S: (2-)22-26-39 |
Cosmetics Regulation Annex III, Reference number 204
Last changed in the version in force , by Regulation (EU) No 344/2013 and Regulation (EU) No 1197/2013, the acts that change names · Annex III on this site
| Reference number | Substance identification | Restrictions | Wording of conditions of use and warnings | |||||
|---|---|---|---|---|---|---|---|---|
| Chemical name/INN | Name of Common Ingredients Glossary | CAS number | EC number | Product type, body parts | Maximum concentration in ready for use preparation | Other | ||
| a | b | c | d | e | f | g | h | i |
| 204 | 2,3-Dihydro-1H-indole-5,6-diol and its hydrobromide salt | Dihydroxy indoline Dihydroxy indoline HBr | 29539-03-5 / 138937-28-7 | — / 421-170-6 | Hair dye substance in non-oxidative hair dye products | 2,0 % | Can cause allergic reaction | |
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 · Cosmetics Regulation Annex III, Reference number 204
Recorded in the version in force , by Regulation (EU) No 344/2013 and Regulation (EU) No 1197/2013, the acts that change names. The change on its version page
| Identifiers | Reference number | Substance identification | Restrictions | Wording of conditions of use and warnings | |||||
|---|---|---|---|---|---|---|---|---|---|
| Chemical name/INN | Name of Common Ingredients Glossary | CAS number | EC number | Product type, body parts | Maximum concentration in ready for use preparation | Other | |||
| a | b | c | d | e | f | g | h | i | |
| Reference number 204CAS 138937-28-7CAS 29539-03-5EC 421-170-6 | 204 | 2,3-Dihydro-1H-indole-5,6-diol and its hydrobromide salt | Dihydroxy indoline Dihydroxy indoline HBr | 29539-03-5 / 138937-28-7 | — / 421-170-6 | Hair dye substance in non-oxidative hair dye products | 2,0 % | Can cause allergic reaction | |
· added · CLP Annex VI section 3, Index No 613-304-00-9
Recorded in the version in force , by Regulation (EC) No 790/2009, the act that change names. The change on its version page
| Identifiers | Index No | International Chemical Identification | EC No | CAS No | Classification | Labelling | Specific Conc. Limits, M-factors | 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) | |||||||
| Index No 613-304-00-9CAS 138937-28-7EC 421-170-6 | 613-304-00-9 | 5,6-dihydroxy-2,3-dihydro-1H-indolium bromide | 421-170-6 | 138937-28-7 | Acute Tox. 4 * Eye Dam. 1 | H302 H318 | GHS05 GHS07 Dgr | H302 H318 | |||
· added · CLP Annex VI section 3, table 2, Index No 613-304-00-9
Recorded in the version in force , by Regulation (EC) No 790/2009, the act that change names. The change on its version page
| Identifiers | Index No | International Chemical Identification | EC No | CAS No | Classification | Labelling | Concentration Limits | Notes |
|---|---|---|---|---|---|---|---|---|
| Index No 613-304-00-9CAS 138937-28-7EC 421-170-6 | 613-304-00-9 | 5,6-dihydroxy-2,3-dihydro-1H-indolium bromide | 421-170-6 | 138937-28-7 | Xn; R22 Xi; R41 | Xn R: 22-41 S: (2-)22-26-39 |
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)