POTASSIUM BORATE (potassium tetraborate)
Official label name (INCI name, EU glossary of cosmetic ingredient names), No 22564
- Prohibited in cosmetics (Annex II)
POTASSIUM BORATE (potassium tetraborate): Prohibited in cosmetics (Annex II, entry 1396), under Regulation (EC) No 1223/2009.
In plain words
What it is used for
Functions declared by manufacturers:
Buffering: stabilises the pH of cosmetics.
What the rules say
It is prohibited to use it in a cosmetic product sold in the European Union, whatever the dose. If it appears on the ingredient list of a recent product, this needs checking: the record may be old or wrong, or the product intended for another market.
The text of the annexes
Prohibited in cosmetics
CosIng links the name POTASSIUM BORATE to this Annex II entry.
- Entry
- Annex II, No 1396
- Substance
- Borates, tetraborates, octaborates and boric acid salts and esters, including: Disodium octaborate anhydrous [1] Disodium octaborate tetrahydrate [2] 2-Aminoethanol, monoester with boric acid [3] 2-Hydroxypropyl ammonium dihydrogen orthoborate [4] Potassium borate, boric acid potassium salt [5] Trioctyldodecyl borate [6] Zinc borate [7] Sodium borate, disodium tetraborate anhydrous; boric acid, sodium salt [8] Tetraboron disodium heptaoxide, hydrate [9] Orthoboric acid, sodium salt [10] Disodium tetraborate decahydrate; borax decahydrate [11] Disodium tetraborate pentahydrate; borax pentahydrate [12]
- CAS
- 12008-41-2 [1]/ 12280-03-4 [2]/ 10377-81-8 [3]/ 68003-13-4 [4]/ 12712-38-8 [5]/ -[6]/ 1332-07-6 [7]/ 1330-43-4 [8]/ 12267-73-1 [9]/ 13840-56-7 [10]/ 1303-96-4 [11]/ 12179-04-3 [12]
- EC
- 234-541-0 [1]/ 234-541-0 [2]/ 233-829-3 [3]/ 268-109-8 [4]/ 603-184-6 [5]/ -[6]/ 215-566-6 [7]/ 215-540-4 [8]/ 235-541-3 [9]/ 237-560-2 [10]/ 215-540-4 [11]/ 215-540-4 [12]
Dates in the act (5)
- Application from 11 June 2019
Points (1)(a) and (2)(b) of Annex II shall apply from 11 June 2019.
- Entry into force on 11 June 2019
- Entry into force on 18 December 2019
- Application from 1 May 2020
Article 1 shall apply from 1 May 2020.
- Entry into force on 1 May 2020
Excerpts from the English text published in the Official Journal. A date may concern only some substances of the act: the excerpt says so.
Identity
- CosIng identifier
- 36937
- CAS (according to CosIng)
- 1332-77-0
- EC (according to CosIng)
- 215-575-5
- Declared functions
- Buffering
- Wikidata
- Q15627938
- PubChem
- 9816075
- ECHA InfoCard
- 100.014.160
- InChIKey
- FZQSLXQPHPOTHG-UHFFFAOYSA-N
Elsewhere in the world
Information on other jurisdictions. What is covered, and what is not yet.
United Kingdom (Great Britain)
- Prohibited in cosmetics (Annex II)
Same entries as in the European Union. Conditions (concentrations, warnings) may differ: they are not compared here.
Switzerland
Regulation (EC) No 1223/2009 applies in Switzerland (Article 54 of the Ordinance on Foodstuffs and Utility Articles).
United States, federal rules
None of the integrated sections of the federal code (21 CFR 700.11 to 700.27 and 250.250) targets this name. The FDA does not publish a list of allowed ingredients.
Glossary: Commission Implementing Decision (EU) 2025/1175. Page updated on 21 October 2026.