CAS number
CAS 66-81-9 Cycloheximide
CAS 66-81-9 · EC 200-636-0 · Index No 613-140-00-8
Where CAS 66-81-9 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 613-140-00-8
Last changed in the version in force , by Regulation (EU) 2018/669 and 2 others, the acts 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) | ||||||
| 613-140-00-8 | cycloheximide (ISO);4-{(2R)-2-[(1S,3S,5S)-3,5- dimethyl-2-oxocyclohexyl]-2- hydroxyethyl}piperidine-2,6- dione | 200-636-0 | 66-81-9 | Muta. 2 Repr. 1B Acute Tox. 2 * Aquatic Chronic 2 | H341 H360D *** H300 H411 | GHS06 GHS08 GHS09 Dgr | H341 H360D *** H300 H411 | |||
CLP Annex VI section 3, table 2, Index No 613-140-00-8
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 |
|---|---|---|---|---|---|---|---|
| 613-140-00-8 | cycloheximide (ISO); 4-{(2R)-2-[(1S,3S,5S)-3,5-dimethyl-2-oxocyclohexyl]-2-hydroxyethyl}piperidine-2,6-dione | 200-636-0 | 66-81-9 | Muta. Cat. 3; R68 Repr. Cat. 2; R61 T+; R28 N; R51-53 | T+; N R: 61-28-51/53-68 S: 53-45-61 | E |
Cosmetics Regulation Annex II, Reference number 729
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 |
| 729 | Cycloheximide | 66-81-9 | 200-636-0 |
REACH Annex XVII appendix 6, Index No 613-140-00-8
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 |
|---|---|---|---|---|
| Cycloheximide | 613-140-00-8 | 200-636-0 | 66-81-9 |
Look up a number
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Its history
· amended · CLP Annex VI section 3, Index No 613-140-00-8
Recorded in the version in force , by Regulation (EU) 2018/669 and 2 others, the acts that change names. Only spacing, dash forms or accents differ. The change on its version page
| Identifiers | Version | Index No | Chemical name | 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 613-140-00-8CAS 66-81-9EC 200-636-0 | Before | 613-140-00-8 | cycloheximide | 200-636-0 | 66-81-9 | Muta. 2 Repr. 1B Acute Tox. 2 * Aquatic Chronic 2 | H341 H360D *** H300 H411 | GHS06 GHS08 GHS09 Dgr | H341 H360D *** H300 H411 | |||
| After | 613-140-00-8 | cycloheximide (ISO);4-{(2R)-2-[(1S,3S,5S)-3,5- dimethyl-2-oxocyclohexyl]-2- hydroxyethyl}piperidine-2,6- dione | 200-636-0 | 66-81-9 | Muta. 2 Repr. 1B Acute Tox. 2 * Aquatic Chronic 2 | H341 H360D *** H300 H411 | GHS06 GHS08 GHS09 Dgr | H341 H360D *** H300 H411 | ||||
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)