What does the restriction note for MAGNESIUM PEROXIDE mean?

The restriction field for MAGNESIUM PEROXIDE reads: III/12. This is the restriction note from the CosIng inventory. For authoritative conditions and limits, always refer to the linked annex entries.

How do I check if my formula contains MAGNESIUM PEROXIDE?

Use the INCI Checker to screen a full ingredient list across selected markets, or use the substance market comparison to review this identity across all supported market datasets.

InventoryRef 3511415/10/2010

MAGNESIUM PEROXIDE

Magnesium dioxide / magnesium peroxide

MAGNESIUM PEROXIDE is linked to 1 EU annex record on this page. Inventory note: III/12.

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Regulatory evidence by market

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Market	Evidence status	Records	Source language
European Union	Evidence linked Restricted entry found Open this evidence	1	English and EU languages
Great Britain	Source mapped Official source mapped; ingredient rule not imported	0	English
Canada	Evidence linked Restricted Open this evidence	1	English and French
New Zealand	Source mapped Official source mapped; ingredient rule not imported	0	English
ASEAN	Source mapped Official source mapped; ingredient rule not imported	0	English and national languages
China	Source mapped Official source mapped; ingredient rule not imported	0	Chinese with selected English material
Japan	Source mapped Official source mapped; ingredient rule not imported	0	Japanese; official English translation available
South Korea	Source mapped Official source mapped; ingredient rule not imported	0	Korean with some English names
United States	Source mapped Official source mapped; ingredient rule not imported	0	English
Australia	Source mapped Official source mapped; ingredient rule not imported	0	English
Brazil	Source mapped Official source mapped; ingredient rule not imported	0	Portuguese with INCI crosswalks
India	Source mapped Official source mapped; ingredient rule not imported	0	English and Hindi
Saudi Arabia	Source mapped Official source mapped; ingredient rule not imported	0	Arabic and English

Chemical identity and properties

PubChem 2D chemical structure for CAS 1335-26-8

CAS 1335-26-8CAS 14452-57-4PubChem CID 61745

Magnesium peroxide (Mg(O2))

Magnesium peroxide appears as a white powder. Noncombustible but accelerates the burning of combustible material, if the combustible material is finely divided the mixture may be explosive. Mixtures of combustible material and the peroxide can be ignited by friction or contact with moisture. Used in medicine, and as a bleaching agent. — CAMEO Chemicals

IUPAC name: magnesium peroxide

Molecular formula: MgO2
Molecular weight: 56.304 g/mol
Exact mass: 55.9748709 Da
Topological polar surface area: 46.1 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 2
Covalent units: 2
Defined stereocentres: 0

Also known as

PeromagMagnesium perhydrolDrillox MMagnesium superoxolX8YVJ0TN96EktomorRefChem:58182215-627-7

11 more reported names

238-438-1Magnesium dioxidemagnesium;peroxideMagnesiumperoxydUNII-X8YVJ0TN96Magnesium peroxide (Mg(O2)a)HSDB 7986(eta~2~-Dioxidanediido)magnesiumEINECS 238-438-1UN1476Magnesium peroxide [UN1476] [Oxidizer]

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

EPA DTXSID:DTXSID9049667

Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for MAGNESIUM PEROXIDE

INCI name

MAGNESIUM PEROXIDE

Description

Magnesium dioxide / magnesium peroxide

Record provenance

Inventory reference: 35114
Imported identity: MAGNESIUM PEROXIDE
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for MAGNESIUM PEROXIDE

Annex III Restriction reference

Entry 12

HYDROGEN PEROXIDE

CAS: 7722-84-1

EC: 231-765-0

Key data

CAS

1335-26-8 / 14452-57-4

215-627-7 / 238-438-1

Restriction

III/12

Function

OXIDISING: Changing the chemical nature of another ingredient by adding oxygen (or removing hydrogen).

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

#15808 · MAGNESIUM PEROXIDE

Ingredients with overlapping formulation functions

HYPOCHLOROUS ACIDANTI-SEBUM, ANTIMICROBIAL, DEODORANT, OXIDISING

IPOMOEA BATATAS ROOT POWDEROXIDISING, SKIN CONDITIONING

LACCASEOXIDISING

LINDERA ERYTHROCARPA EXTRACTOXIDISING

MELAMINE PEROXIDEOXIDISING

NIOBIUM PENTOXIDEANTI-SEBORRHEIC; ANTIMICROBIAL; ANTI-SEBUM; DEODORANT; ORAL CARE; OXIDISING

OZONIZED TURPENTINEANTIMICROBIAL, OXIDISING, SKIN CONDITIONING

PERSICARIA BLUMEI EXTRACTOXIDISING

Additional official and scientific sources

11 external databases to check this identity in

Each link searches that source for this identity. What each source is, and its legal weight

ECHA CHEM / Information on chemicals PubChem PUG REST EU Safety Gate cosmetic product alerts ECHA CHEM US EPA CompTox Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal

How MAGNESIUM PEROXIDE appears in the CosIng inventory

The CosIng inventory lists MAGNESIUM PEROXIDE as a cosmetic ingredient and this page links it to 1 annex record. The inventory entry captures names and identifiers, while the annex record shows where the substance is prohibited, restricted or positively listed in EU cosmetics law.

MAGNESIUM PEROXIDE is also tagged with 1 cosmetic function in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

MAGNESIUM PEROXIDE appears in the EU CosIng inventory and has linked annex records. Check the annex records above for applicable restrictions, concentration limits and conditions of use. Annex II listing means prohibited; Annex III means restricted; Annexes IV, V and VI mean permitted under specified conditions.

The restriction field for MAGNESIUM PEROXIDE reads: "III/12". This is the restriction note recorded in the CosIng inventory for this ingredient. For authoritative conditions and limits, always refer to the linked annex entries above.

According to the EU CosIng inventory, MAGNESIUM PEROXIDE carries the following function designation(s):

OXIDISING

CAS 1335-26-8 / 14452-57-4 may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.

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Source note for MAGNESIUM PEROXIDE

This page combines the CosIng inventory entry for MAGNESIUM PEROXIDE with 1 linked Annex II–VI record from the local dataset built from public European Commission cosmetic ingredient materials.

Use this inventory page to research MAGNESIUM PEROXIDE and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

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Tools & next steps

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