CAS number
CAS 104-98-3 3-Imidazol-4-ylacrylic acid (Urocanic…
CAS 104-98-3 · CAS 27538-35-8 · EC 203-258-4 · EC 248-515-1
Where CAS 104-98-3 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
Cosmetics Regulation Annex II, Reference number 418
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 |
| 418 | 3-Imidazol-4-ylacrylic acid (Urocanic acid) and its ethyl ester | 104-98-3/27538-35-8 | 203-258-4/248-515-1 |
Look up a number
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Its history
No change to this entry since the first version the record holds, in force 11 July 2013.
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)