EC number
EC 205-457-1 6,10-Dimethyl-3,5,9-undecatrien-2-one…
CAS 141-10-6 · EC 205-457-1
Where EC 205-457-1 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
Cosmetics Regulation Annex II, Reference number 433
Last changed in the version in force , by Regulation (EU) No 483/2013, the act that change names · Annex II on this site
| Reference number | Substance identification | ||
|---|---|---|---|
| Chemical name/INN | CAS number | EC number | |
| a | b | c | d |
| 433 | 6,10-Dimethyl-3,5,9-undecatrien-2-one (Pseudoionone), when used as a fragrance ingredient | 141-10-6 | 205-457-1 |
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 · Cosmetics Regulation Annex II, Reference number 433
Recorded in the version in force , by Regulation (EU) No 483/2013, the act that change names. The change on its version page
| Identifiers | Version | Reference number | Substance identification | ||
|---|---|---|---|---|---|
| Chemical name/INN | CAS number | EC number | |||
| a | b | c | d | ||
| Reference number 433CAS 141-10-6EC 205-457-1 | Before | 433 | 6,10-Dimethyl-3,5,9-undecatrien-2-one | 141-10-6 | 205-457-1 |
| After | 433 | 6,10-Dimethyl-3,5,9-undecatrien-2-one (Pseudoionone), when used as a fragrance ingredient | 141-10-6 | 205-457-1 | |
Sources
- Cosmetics Regulation: every version the record holds; rows read from EUR-Lex consolidated version 02009R1223-20260518, in force 18 May 2026 (external, EUR-Lex)