MAGNESIUM PEROXIDE
Official label name (INCIInternational name of cosmetic ingredients: the one printed on the pack. name, EU glossary of cosmetic ingredient names), No 15808
- Cited as an example in a rule, no rule of its own (Annex III)
MAGNESIUM PEROXIDE: Cited as an example in a rule, no rule of its own (Annex III, entry 12), under Regulation (EC) No 1223/2009. Annexes of the Regulation consulted on 21 October 2026.
Who it concerns
What official classifications and rules say for each group. A classification describes the hazard of the pure substance, not the risk of a product that contains it, which depends on the dose and the exposure.
Prohibition or serious classificationThe text prohibits the substance for this use, or ranks it among the most serious hazards (known or presumed carcinogenic, mutagenic or reprotoxic, identified endocrine disruptor).Worth watchingThe text sets a condition or flags a hazard worth knowing: allergen, suspected effect, condition for children, hazard to the aquatic environment.For informationOfficial information with no condition on a finished product: warning to read, irritation of the pure substance.
Pregnancy and breastfeeding
No classification harmonised by the European Union covers reproduction, the unborn child or breastfeeding for this substance. This does not mean it has been judged to have no effect during pregnancy.
Babies and children
The Cosmetics Regulation sets no age-related condition for this ingredient.
Skin, eyes and allergies
No official classification for sensitisation, irritation or eye damage, and no obligation to label it as an allergen.
Environment
No official classification as hazardous to the aquatic environment and no assessment as an endocrine disruptor for the environment.
Read on the label
The Cosmetics Regulation requires no warning to be printed for this ingredient.
In plain words
What it is used for
Functions declared by manufacturers:
Oxidising: changes the chemical nature of another substance by adding oxygen or removing hydrogen.
What the rules say
This name is only cited as an example in an entry of Annex III, which covers a family of substances: the exact conditions depend on the form used.
The text of the annexes
Allowed with restrictions
CosIng cites the name MAGNESIUM PEROXIDE in this entry, whose regulated name is “HYDROGEN PEROXIDE”: the title below says which form or use it covers.
| Product type | Maximum concentration | Other conditions | Warning to print |
|---|---|---|---|
| (a) Hair products | 12% of H2O2 (40 volumes), present or released | not set | Contains hydrogen peroxide Avoid contact with eyes Rinse immediately if product comes into contact with them. |
| (b) Skin products | 4% of H2O2, present or released | not set | Contains hydrogen peroxide Avoid contact with eyes Rinse immediately if product comes into contact with them. |
| (c) Nail hardening products | 2% of H2O2, present or released | not set | Contains hydrogen peroxide Avoid contact with eyes Rinse immediately if product comes into contact with them. |
| (d) Oral products, including mouth rinse, tooth paste and tooth whitening or bleaching products | ≤ 0.1% of H2O2, present or released | not set | not set |
| (e) Tooth whitening or bleaching products | > 0.1% ≤ 6% of H2O2, present or released | To be only sold to dental practitioners. For each cycle of use, first use by dental practitioners as defined under Directive 2005/36/EC of the European Parliament and of the Council* or under their direct supervision if an equivalent level of safety is ensured. Afterwards to be provided to the consumer to complete the cycle of use. Not to be used on a person under 18 years of age. | Concentration of H2O2 present or released indicated in percentage. Not to be used on a person under 18 years of age. To be only sold to dental practitioners. For each cycle of use, the first use to be only done by dental practitioners or under their direct supervision if an equivalent level of safety is ensured. Afterwards to be provided to the consumer to complete the cycle of use. f) To be printed on the label: ‘For professional use only. Avoid contact with eyes. Rinse eyes immediately if product comes into contact with them. Contains hydrogen peroxide |
| (f) Products intended for eyelashes | 2% of H2O2, present or released | For professional use only | Wear suitable gloves |
- Entry
- Annex III, No 12
- Substance
- Hydrogen peroxide and other compounds or mixtures that release hydrogen peroxide, including carbamide peroxide and zinc peroxide, with the exception of the following substances in Annex II: No 1397, 1398, 1399
- Glossary names
- HYDROGEN PEROXIDE
- CAS
- 7722-84-1
- EC
- 231-765-0
Dates in the act (1)
- Entry into force on 12 June 2019
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
- 35114
- CAS (according to CosIng)
- 1335-26-8, 14452-57-4
- EC (according to CosIng)
- 215-627-7, 238-438-1
- Declared functions
- Oxidising
- Wikidata
- Q72488056
- ECHAEuropean Chemicals Agency. InfoCard
- 100.014.207
CosIng cites 2 CAS numbers for this name: it covers several substances.
Elsewhere in the world
Information on other jurisdictions, with no effect on sale in France. What is covered, and what is not yet.
Comparison between countries
Most restrictive status in each country, and the maximum concentration cited. The details and the source of each rule follow.
| Country | Rule | Maximum concentration cited |
|---|---|---|
| European Union | Cited as an example in a rule, no rule of its own | not cited |
| United Kingdom | Cited as an example in a rule, no rule of its own | not cited |
| Switzerland | EU Regulation applies | not cited |
| United States (federal) | No federal rule recorded | not cited |
| Japan | No entry in the lists recorded | not cited |
| South Korea | Restricted | 2 to 3% |
| China | No entry in the lists recorded | not cited |
| Australia | No entry in the lists recorded | not cited |
| Brazil | No entry in the lists recorded | not cited |
United Kingdom (Great Britain)
- Cited as an example in a rule, no rule of its own (Annex III)
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.
South Korea
- Restricted: 과산화수소 및 과산화수소 생성물질 (MAGNESIUM PEROXIDE)
별표 2, 기타 (other substances with limits), entry 3, page 27. Limit: ․두발용 제품류에 과산화수소 로서 3% ․손톱경화용 제품에 과산화수소 로서 2%.
Conditions, source text, in Korean
비고: 기타 제품에는 사용금지 | 화학물질명: 과산화수소 (CAS No. 7722-84-1) | 화학물질명: 과붕산나트륨 (CAS No. 15120-21-5) | 화학물질명: 소듐카보네이트퍼옥사이드 (CAS No. 15630-89-4) | 화학물질명: 우레아퍼옥사이드 (CAS No. 124-43-6) | 화학물질명: 칼슘퍼옥사이드 (CAS No. 1305-79-9) | 화학물질명: 피브이피-하이드로젠퍼옥사이드 (CAS No. 135927-36-5) | 화학물질명: 스트론튬퍼옥사이드 (CAS No. 1314-18-7) | 화학물질명: 징크퍼옥사이드 (CAS No. 1314-22-3) | 화학물질명: 마그네슘퍼옥사이드 (CAS No. 1335-26-8 / 14452-57-4)
Glossary: Commission Implementing Decision (EU) 2025/1175. Page updated on 21 October 2026.