CAS number
CAS 1310-58-3 Potassium hydroxide
CAS 1310-58-3 · CAS 1310-73-2 · EC 215-181-3 · EC 215-185-5 · Index No 019-002-00-8
Where CAS 1310-58-3 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
CLP Annex VI section 3, Index No 019-002-00-8
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) | ||||||
| 019-002-00-8 | potassium hydroxide; caustic potash | 215-181-3 | 1310-58-3 | Acute Tox. 4 * Skin Corr. 1A | H302 H314 | GHS05 GHS07 Dgr | H302 H314 | Skin Corr. 1A; H314: C ≥ 5 % Skin Corr. 1B; H314: 2 % ≤ C < 5 % Skin Irrit. 2; H315: 0,5 % ≤ C < 2 % Eye Irrit. 2; H319: 0,5 % ≤ C < 2 % | ||
CLP Annex VI section 3, table 2, Index No 019-002-00-8
No change to this entry since the first version the record holds, in force 1 December 2010. · Annex VI on this site
| Index No | International Chemical Identification | EC No | CAS No | Classification | Labelling | Concentration Limits | Notes |
|---|---|---|---|---|---|---|---|
| 019-002-00-8 | potassium hydroxide; caustic potash | 215-181-3 | 1310-58-3 | Xn; R22 C; R35 | C R: 22-35 S: (1/2-)26-36/37/39-45 | C; R35: C ≥ 5 % C; R34: 2 % ≤ C < 5 % Xi; R36/38: 0.5 % ≤ C < 2 % |
Cosmetics Regulation Annex III, Reference number 15a
Last changed in the version in force , by Regulation (EU) 2016/622 and Regulation (EU) 2016/621, the acts that change names · 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 |
| 15a | Potassium or sodium hydroxide | Potassium hydroxide/sodium hydroxide | 1310-58-3/1310-73-2 | 215-181-3/215-185-5 | (a) Nail cuticle solvent | (a) 5 % | (a) Contains alkali Avoid contact with eyes Can cause blindness Keep out of reach of children | |
| (b) Hair straightener | 2 % | General use | Contains alkali Avoid contact with eyes Can cause blindness Keep out of reach of children | |||||
| 4,5 % | Professional use | For professional use only Avoid contact with eyes Can cause blindness | ||||||
| (c) pH adjuster for depilatories | (c) pH < 12,7 | (c) Keep out of reach of children Avoid contact with eyes | ||||||
| (d) Other uses as pH adjuster | (d) pH < 11 | |||||||
Cosmetics Regulation Annex III, Reference number 15d
Last changed in the version in force , by Regulation (EU) 2016/622 and Regulation (EU) 2016/621, the acts that change names · 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 |
| 15d | Potassium hydroxide | Potassium hydroxide | 1310-58-3 | 215-181-3 | Callosity softener/remover | 1,5 % | Contains alkali Avoid contact with eyes Keep out of reach of children Read directions for use carefully | |
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 III, Reference number 15a
Recorded in the version in force , by Regulation (EU) 2016/622 and Regulation (EU) 2016/621, the acts that change names. The change on its version page
| Identifiers | Version | 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 | ||
| Reference number 15aCAS 1310-58-3CAS 1310-73-2EC 215-181-3EC 215-185-5 | Before | 15a | Potassium or sodium hydroxide | Potassium hydroxide/sodium hydroxide | 1310-58-3/1310-73-2 | 215-181-3/215-185-5 | (a) Nail cuticle solvent | (a) 5 % | (a) Contains alkali Avoid contact with eyes Can cause blindness Keep out of reach of children | |
| (b) Hair straightener | 2 % | General use | Contains alkali Avoid contact with eyes Can cause blindness Keep out of reach of children | |||||||
| After | 15a | Potassium or sodium hydroxide | Potassium hydroxide/sodium hydroxide | 1310-58-3/1310-73-2 | 215-181-3/215-185-5 | (a) Nail cuticle solvent | (a) 5 % | (a) Contains alkali Avoid contact with eyes Can cause blindness Keep out of reach of children | ||
| (b) Hair straightener | 2 % | General use | Contains alkali Avoid contact with eyes Can cause blindness Keep out of reach of children | |||||||
| 4,5 % | Professional use | For professional use only Avoid contact with eyes Can cause blindness | ||||||||
| (c) pH adjuster for depilatories | (c) pH < 12,7 | (c) Keep out of reach of children Avoid contact with eyes | ||||||||
| (d) Other uses as pH adjuster | (d) pH < 11 | |||||||||
· added · Cosmetics Regulation Annex III, Reference number 15d
Recorded in the version in force , by Regulation (EU) 2016/622 and Regulation (EU) 2016/621, the acts that change names. The change on its version page
| Identifiers | 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 | |
| Reference number 15dCAS 1310-58-3EC 215-181-3 | 15d | Potassium hydroxide | Potassium hydroxide | 1310-58-3 | 215-181-3 | Callosity softener/remover | 1,5 % | Contains alkali Avoid contact with eyes Keep out of reach of children Read directions for use carefully | |
Sources
- CLP: every version the record holds; rows read from EUR-Lex consolidated version 02008R1272-20270101, in force 1 January 2027 (external, EUR-Lex)
- Cosmetics Regulation: every version the record holds; rows read from EUR-Lex consolidated version 02009R1223-20260518, in force 18 May 2026 (external, EUR-Lex)