CAS number
CAS 7778-50-9 potassium dichromate
CAS 7778-50-9 · EC 231-906-6 · Index No 024-002-00-6
Where CAS 7778-50-9 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 024-002-00-6
No change to this entry since the first version the record holds, in force 1 December 2010. · 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) | ||||||
| 024-002-00-6 | potassium dichromate | 231-906-6 | 7778-50-9 | Ox. Sol. 2 Carc. 1B Muta. 1B Repr. 1B Acute Tox. 2 * Acute Tox. 3 * STOT RE 1 Acute Tox. 4 * Skin Corr. 1B Resp. Sens. 1 Skin Sens. 1 Aquatic Acute 1 Aquatic Chronic 1 | H272 H350 H340 H360FD H330 H301 H372 ** H312 H314 H334 H317 H400 H410 | GHS03 GHS06 GHS08 GHS05 GHS09 Dgr | H272 H350 H340 H360FD H330 H301 H372 ** H312 H314 H334 H317 H410 | STOT SE 3; H335: C ≥ 5 % | 3 | |
CLP Annex VI section 3, table 2, Index No 024-002-00-6
Last changed in the version in force , by Regulation (EU) No 286/2011, the act that change names · Annex VI on this site
| Index No | International Chemical Identification | EC No | CAS No | Classification | Labelling | Concentration Limits | Notes |
|---|---|---|---|---|---|---|---|
| 024-002-00-6 | potassium dichromate | 231-906-6 | 7778-50-9 | O; R8 Carc. Cat. 2; R45 Muta. Cat. 2; R46 Repr. Cat. 2; R60-61 T+; R26 T; R25-48/23 Xn; R21 C; R34 R42/43 N; R50-53 | T+; N; O R: 45-46-60-61-8-21-25-26-34-42/43-48/23-50/53 S: 53-45-60-61 | C; R34: C ≥ 10 %: Xi; R36/37/38: 5 % ≤ C < 10 % | E3 |
PIC Regulation Annex I, the entry for Potassium dichromate
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 |
|---|---|---|---|---|---|---|
| Potassium dichromate | 7778-50-9 | 231-906-6 | ex28415000 | i(2) | sr |
REACH Annex XIV, Entry 19
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 | |||||
| 19. | Potassium dichromate EC No: 231-906-6 CAS No: 7778-50-9 | Carcinogenic (category 1B) Mutagenic (category 1B) Toxic for reproduction (category 1B) | 21 March 2016 | 21 September 2017 | — | — |
REACH Annex XVII appendix 2, Index No 024-002-00-6
No change to this entry since the first version the record holds, in force 12 October 2008. · Annex XVII on this site
| Substances | Index No | EC No | CAS No | Notes |
|---|---|---|---|---|
| Potassium dichromate | 024-002-00-6 | 231-906-6 | 7778-50-9 | E |
REACH Annex XVII appendix 4, Index No 024-002-00-6
No change to this entry since the first version the record holds, in force 12 October 2008. · Annex XVII on this site
| Substances | Index No | EC No | CAS No | Notes |
|---|---|---|---|---|
| Potassium dichromate | 024-002-00-6 | 231-906-6 | 7778-50-9 | E |
REACH Annex XVII appendix 6, Index No 024-002-00-6
No change to this entry since the first version the record holds, in force 12 October 2008. · Annex XVII on this site
| Substances | Index No | EC No | CAS No | Notes |
|---|---|---|---|---|
| Potassium dichromate | 024-002-00-6 | 231-906-6 | 7778-50-9 | E |
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 Potassium dichromate
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 |
|---|---|---|---|---|---|---|---|
| Potassium dichromateCAS 7778-50-9EC 231-906-6 | Potassium dichromate | 7778-50-9 | 231-906-6 | ex28415000 | i(2) | sr |
· added · REACH Annex XIV, Entry 19
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 19CAS 7778-50-9EC 231-906-6 | 19. | Potassium dichromate EC No: 231-906-6 CAS No: 7778-50-9 | Carcinogenic (category 1B) Mutagenic (category 1B) Toxic for reproduction (category 1B) | 21 March 2016 | 21 September 2017 | — | — |
· amended · CLP Annex VI section 3, table 2, Index No 024-002-00-6
Recorded in the version in force , by Regulation (EU) No 286/2011, the act that change names. Only spacing, dash forms or accents differ. The change on its version page
| Identifiers | Version | Index No | International Chemical Identification | EC No | CAS No | Classification | Labelling | Concentration Limits | Notes |
|---|---|---|---|---|---|---|---|---|---|
| Index No 024-002-00-6CAS 7778-50-9EC 231-906-6 | Before | 024-002-00-6 | potassium dichromate | 231-906-6 | 7778-50-9 | O; R8 Carc. Cat. 2; R45 Muta. Cat. 2; R46 Repr. Cat. 2; R60-61 T+; R26 T; R25-48/23 Xn; R21 C; R34 R42/43 N; R50-53 | T+; N; O R: 45-46-60-61-8-21-25-26-34-42/43-48/23-50/53 S: 53-45-60-61 | C; R34: C ≥ 10 %: Xi; R36/37/38: 5 % ≤ C < 10 % | |
| After | 024-002-00-6 | potassium dichromate | 231-906-6 | 7778-50-9 | O; R8 Carc. Cat. 2; R45 Muta. Cat. 2; R46 Repr. Cat. 2; R60-61 T+; R26 T; R25-48/23 Xn; R21 C; R34 R42/43 N; R50-53 | T+; N; O R: 45-46-60-61-8-21-25-26-34-42/43-48/23-50/53 S: 53-45-60-61 | C; R34: C ≥ 10 %: Xi; R36/37/38: 5 % ≤ C < 10 % | E3 |
Sources
- CLP: every version the record holds; rows read from EUR-Lex consolidated version 02008R1272-20270101, in force 1 January 2027 (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)