CAS number
CAS 2809-21-4 (1-Hydroxyethylidene-diphosphonic acid)…
CAS 2809-21-4 · EC 220-552-8
Where CAS 2809-21-4 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 III, Reference number 53
No change to this entry since the first version the record holds, in force 11 July 2013. · 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 |
| 53 | (1-Hydroxyethylidene-diphosphonic acid) and its salts | Etidronic acid | 2809-21-4 | 220-552-8 | (a) Hair- product | 1,5 % (as etidronic acid) | ||
| (b) Soap | 0,2 % (as etidronic acid) | |||||||
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)