EC number
EC 231-801-5 Acids generated from chromium trioxide…
CAS 7738-94-5 · CAS 13530-68-2 · EC 231-801-5 · EC 236-881-5
Where EC 231-801-5 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
PIC Regulation Annex I, the entry for Acids generated from chromium trioxide and their oligomers:
Last changed in the version in force , by Regulation (EU) 2026/1278, 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 |
|---|---|---|---|---|---|---|
| Acids generated from chromium trioxide and their oligomers: Chromic acid, Dichromic acid, Oligomers of chromic acid and dichromic acid | 7738-94-5 13530-68-2 and others | 231-801-5 236-881-5 and others | ex28199090 | i(2) | sr |
REACH Annex XIV, Entry 17
Last changed in the version in force , by Regulation (EU) No 348/2013, the act that change names · Annex XIV on this site
| Entry Nr | Substance | Intrinsic property(ies) referred to in Article 57 | Transitional arrangements | Exempted (categories of) uses | Review periods | |
|---|---|---|---|---|---|---|
| Latest application date | Sunset date | |||||
| 17. | Acids generated from chromium trioxide and their oligomers Group containing: Chromic acid EC No: 231-801-5 CAS No: 7738-94-5 Dichromic acid EC No: 236-881-5 CAS No: 13530-68-2 Oligomers of chromic acid and dichromic acid EC No: not yet assigned CAS No: not yet assigned | Carcinogenic (category 1B) | 21 March 2016 | 21 September 2017 | — | — |
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
· added · PIC Regulation Annex I, the entry for Acids generated from chromium trioxide and their oligomers:
Recorded in the version in force , by Regulation (EU) 2026/1278, the act that change names. The change on its version page
| Identifiers | Chemical | CAS No | EC No | CN code | Subcategory | Use limitation | Countries for which no notification is required |
|---|---|---|---|---|---|---|---|
| Acids generated from chromium trioxide and their oligomers:CAS 13530-68-2CAS 7738-94-5EC 231-801-5EC 236-881-5 | Acids generated from chromium trioxide and their oligomers: Chromic acid, Dichromic acid, Oligomers of chromic acid and dichromic acid | 7738-94-5 13530-68-2 and others | 231-801-5 236-881-5 and others | ex28199090 | i(2) | sr |
· added · REACH Annex XIV, Entry 17
Recorded in the version in force , by Regulation (EU) No 348/2013, the act that change names. The change on its version page
| Identifiers | Entry Nr | Substance | Intrinsic property(ies) referred to in Article 57 | Transitional arrangements | Exempted (categories of) uses | Review periods | |
|---|---|---|---|---|---|---|---|
| Latest application date | Sunset date | ||||||
| Entry 17CAS 13530-68-2CAS 7738-94-5EC 231-801-5EC 236-881-5 | 17. | Acids generated from chromium trioxide and their oligomers Group containing: Chromic acid EC No: 231-801-5 CAS No: 7738-94-5 Dichromic acid EC No: 236-881-5 CAS No: 13530-68-2 Oligomers of chromic acid and dichromic acid EC No: not yet assigned CAS No: not yet assigned | Carcinogenic (category 1B) | 21 March 2016 | 21 September 2017 | — | — |
Sources
- 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)