CAS number
CAS 81-81-2 Warfarin
CAS 81-81-2 · CAS 5543-57-7 · CAS 5543-58-8 · EC 201-377-6 · EC 226-907-3 · EC 226-908-9 · Index No 607-056-00-0
Where CAS 81-81-2 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 607-056-00-0
Last changed in the version detected · 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) | ||||||
| 607-056-00-0 | warfarin (ISO); 4-hydroxy-3-(3-oxo-1-phenylbutyl)-2H-chromen-2-one; [1] (S)-4-hydroxy-3-(3-oxo-1-phenylbutyl)-2-benzopyrone; [2] (R)-4-hydroxy-3-(3-oxo-1-phenylbutyl)-2-benzopyrone [3] | 201-377-6 [1] 226-907-3 [2] 226-908-9 [3] | 81-81-2 [1] 5543-57-7 [2] 5543-58-8 [3] | Repr. 1A Acute Tox. 1 Acute Tox. 1 Acute Tox. 2 STOT RE 1 Aquatic Chronic 2 | H360D H330 H310 H300 H372 (blood) H411 | GHS08 GHS06 GHS09 Dgr | H360D H330 H310 H300 H372 (blood) H411 | Repr. 1A; H360D: C ≥ 0,003 % STOT RE 1; H372 (blood): C ≥ 0,5 % STOT RE 2; H373 (blood): 0,05 % ≤ C < 0,5 % | ||
CLP Annex VI section 3, table 2, Index No 607-056-00-0
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 |
|---|---|---|---|---|---|---|---|
| 607-056-00-0 | warfarin (ISO); [1] (S)-4-hydroxy-3-(3-oxo-1-phenylbutyl)-2-benzopyrone; [2] (R)-4-hydroxy-3-(3-oxo-1-phenylbutyl)-2-benzopyrone [3] | 201-377-6 [1] 226-907-3 [2] 226-908-9 [3] | 81-81-2 [1] 5543-57-7 [2] 5543-58-8 [3] | Repr. Cat. 1; R61 T; R48/25 R52-53 | T R: 61-48/25-52/53 S: 53-45-61 | E |
Cosmetics Regulation Annex II, Reference number 203
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 |
| 203 | Warfarin (INN) and its salts | 81-81-2 | 201-377-6 |
PIC Regulation Annex I, the entry for Warfarin
Last changed in the version in force , by Regulation (EU) 2024/3199, the act that change names · Annex I on this site
| Chemical | CAS No | EC No | CN code | Subcategory | Use limitation | Countries for which no notification is required |
|---|---|---|---|---|---|---|
| Warfarin | 81-81-2 | 201-377-6 | ex29322090 | p(1)-p(2) | b-b |
PIC Regulation Annex I, table 2, the entry for Warfarin
Last changed in the version in force , by Regulation (EU) 2024/3199, the act that change names · Annex I on this site
| Chemical | CAS No | EC No | CN code | Category | Use limitation |
|---|---|---|---|---|---|
| Warfarin | 81-81-2 | 201-377-6 | ex29322090 | p | b |
REACH Annex XVII appendix 5, Index No 607-056-00-0
Last changed in the version in force , by Regulation (EU) 2017/1510, the act that change names · Annex XVII on this site
| Substances | Index No | EC No | CAS No | Notes |
|---|---|---|---|---|
| Warfarin (ISO); 4-hydroxy-3-(3-oxo-1- phenylbutyl)-2H-chromen-2-one; [1] (S)-4-hydroxy-3-(3-oxo- 1-phenylbutyl)-2-benzopyrone; [2] (R)-4-hydroxy-3-(3-oxo- 1-phenylbutyl)-2-benzopyrone [3] | 607-056-00-0 | 201-377-6 [1] 226-907-3 [2] 226-908-9 [3] | 81-81-2 [1] 5543-57-7 [2] 5543-58-8 [3] |
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
· amended · CLP Annex VI section 3, Index No 607-056-00-0
Recorded in the version detected . The change on its version page
| Identifiers | Version | 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 607-056-00-0CAS 5543-57-7CAS 5543-58-8CAS 81-81-2EC 201-377-6EC 226-907-3EC 226-908-9 | Before | 607-056-00-0 | warfarin (ISO); [1] (S)-4-hydroxy-3-(3-oxo-1-phenylbutyl)-2-benzopyrone; [2] (R)-4-hydroxy-3-(3-oxo-1-phenylbutyl)-2-benzopyrone [3] | 201-377-6 [1] 226-907-3 [2] 226-908-9 [3] | 81-81-2 [1] 5543-57-7 [2] 5543-58-8 [3] | Repr. 1A
STOT RE 1
Aquatic Chronic | H360D | GHS08 Dgr | H360D | |||
| After | 607-056-00-0 | warfarin (ISO); 4-hydroxy-3-(3-oxo-1-phenylbutyl)-2H-chromen-2-one; [1] (S)-4-hydroxy-3-(3-oxo-1-phenylbutyl)-2-benzopyrone; [2] (R)-4-hydroxy-3-(3-oxo-1-phenylbutyl)-2-benzopyrone [3] | 201-377-6 [1] 226-907-3 [2] 226-908-9 [3] | 81-81-2 [1] 5543-57-7 [2] 5543-58-8 [3] | Repr. 1A Acute Tox. 1 Acute Tox. 1 Acute Tox. 2 STOT RE 1 Aquatic Chronic 2 | H360D H330 H310 H300 H372 (blood) H411 | GHS08 GHS06 GHS09 Dgr | H360D H330 H310 H300 H372 (blood) H411 | Repr. 1A; H360D: C ≥ 0,003 % STOT RE 1; H372 (blood): C ≥ 0,5 % STOT RE 2; H373 (blood): 0,05 % ≤ C < 0,5 % | |||
· amended · PIC Regulation Annex I, the entry for Warfarin
Recorded in the version in force , by Regulation (EU) 2024/3199, the act that change names. The change on its version page
| Identifiers | Version | Chemical | CAS No | EC No | CN code | Subcategory | Use limitation | Countries for which no notification is required |
|---|---|---|---|---|---|---|---|---|
| WarfarinCAS 81-81-2EC 201-377-6 | Before | Warfarin | 81-81-2 | 201-377-6 | ex29322090 | |||
| After | Warfarin | 81-81-2 | 201-377-6 | ex29322090 | p(1)-p(2) | b-b |
· added · PIC Regulation Annex I, table 2, the entry for Warfarin
Recorded in the version in force , by Regulation (EU) 2024/3199, the act that change names. The change on its version page
| Identifiers | Chemical | CAS No | EC No | CN code | Category | Use limitation |
|---|---|---|---|---|---|---|
| WarfarinCAS 81-81-2EC 201-377-6 | Warfarin | 81-81-2 | 201-377-6 | ex29322090 | p | b |
· amended · PIC Regulation Annex I, the entry for Warfarin
Recorded in the version in force , by Regulation (EU) 2022/643, the act that change names. The change on its version page
| Identifiers | Version | Chemical | CAS No | EC No | CN code | Subcategory | Use limitation | Countries for which no notification is required |
|---|---|---|---|---|---|---|---|---|
| WarfarinCAS 81-81-2EC 201-377-6 | Before | Warfarin | 81-81-2 | 201-377-6 | p(1) | b | ||
| After | Warfarin | 81-81-2 | 201-377-6 | ex29322090 | p(1) | b |
· amended · REACH Annex XVII appendix 5, Index No 607-056-00-0
Recorded in the version in force , by Regulation (EU) 2017/1510, the act that change names. The change on its version page
| Identifiers | Version | Substances | Index No | EC No | CAS No | Notes |
|---|---|---|---|---|---|---|
| Index No 607-056-00-0CAS 5543-57-7CAS 5543-58-8CAS 81-81-2EC 201-377-6EC 226-907-3EC 226-908-9 | Before | 607-056-00-0 | 201-377-6 | 81-81-2 | ||
| After | Warfarin (ISO); 4-hydroxy-3-(3-oxo-1- phenylbutyl)-2H-chromen-2-one; [1] (S)-4-hydroxy-3-(3-oxo- 1-phenylbutyl)-2-benzopyrone; [2] (R)-4-hydroxy-3-(3-oxo- 1-phenylbutyl)-2-benzopyrone [3] | 607-056-00-0 | 201-377-6[1] 226-907-3 [2] 226-908-9 [3] | 81-81-2[1] 5543-57-7 [2] 5543-58-8 [3] |
· added · PIC Regulation Annex I, the entry for Warfarin
Recorded in the version in force , by Regulation (EU) No 1078/2014 and Regulation (EU) 2019/1701, the acts that change names. The change on its version page
| Identifiers | Chemical | CAS No | Einecs No | CN code | Subcategory | Use limitation | Countries for which no notification is required |
|---|---|---|---|---|---|---|---|
| WarfarinCAS 81-81-2EC 201-377-6 | Warfarin | 81-81-2 | 201-377-6 | 29322090 | p(1) | b |
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)
- PIC Regulation: every version the record holds; rows read from EUR-Lex consolidated version 02012R0649-20261001, in force 1 October 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)