Ingredient Dictionary

MANGANESE DIOXIDE

Manganese dioxide is a manganese molecular entity with formula MnO2.

Definition

Manganese dioxide is a manganese molecular entity with formula MnO2. It is a metal oxide and a manganese molecular entity.

Source: PubChem

US FDA substance register · UNII TF219GU161 · registered name MANGANESE DIOXIDE · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Slows spoilage by oxygenANTIOXIDANT

Safety & regulatory references

Not classified under Korea’s toxic-substance GHS list · existing chemical substance

Source: Korea toxic substances GHS register (NIER)

Other restriction: ban substances that deplete the ozone layer

Source: EU CosIng ingredient list

More data — names, identifiers, properties, test records, literature

Official labels & definitions

JCIA labelling name 酸化マンガン: 本品は、次の化学式で表される無機化合物である。

Source: JCIA labelling names (Japan)

Names & identifiers

MANGANESE DIOXIDEINCI망가니즈다이옥사이드Korean label name (MFDS standard)Manganese oxide (MnO2)Synonym酸化マンガンJapanese labelling name

CAS No.chemical registry number: 1313-13-9
EC No.EU chemical inventory number: 215-202-6
DTXSIDUS EPA chemical ID: DTXSID6042109
DTXCIDUS EPA compound ID: DTXCID001507827

IUPAC: Manganese(4+) dioxide
Molecular formula: MnO2
Molecular weight: 86.936 g/mol

Measured properties

Appearance: Dry Powder, Large Crystals, CBI, Other Solid, Wet Solid · Natural form is steel-gray when in lumps and black when powdered, The artificial precipitate in a brownish-black solid, Both usually have some manganese oxide and water, [Merck Index] Brown odorless powder, [Alfa Aesar MSDS]
Solubility: Solubility in water: none
Density: 5.0 g/cm³ · 5.08 @25 °C
Odour: odourless
Melting/freezing point: &amp, gt, 723 K
Water solubility: &amp, lt, 0.1 ㎎/ℓ
Relative density: 5.21 (21 °C)
Decomposition temperature: 535 ℃
Molecular weight: 86.9

Values measured on the substance itself. The KOSHA data are a reference for writing and reviewing safety data sheets, not a specification for a commercial raw material.

Source: PubChem · KOSHA safety data sheets (Korea)

What products actually use it for

What the 25 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.

Pigment5
Intermediate3
Oxidizing agent2
Catalyst2
Filler2
Soil amendments2
Ion exchange agent1
Antioxidant1

7 other uses

Surface modifier1
Adsorbent1
Chemical reaction regulator1
Sealant (barrier)1
Processing aids not otherwise specified1
Adhesion/cohesion promoter1
pH regulating agent1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

6 skin studies and 3 eye studies are on record.

Classed as low3

The study conclusions largely agree (100%). These tests are on the raw material itself; irritation at the amount in a finished product is a different question.

See all 9 studies

Studies Indicate No Significant Irritation
skin corrosion: in vitro / ex vivo · Screening · other guideline: EU method B.46 (in vitro skin irritation) equivalent or similar to
Classification not possible
Skin Irritation · Screening
Classification not possible
Skin Sensitization · Screening
Not likely to be sensitizing
skin sensitisation: in vivo (LLNA) · Screening · according to OECD Guideline 429 (Skin Sensitisation: Local Lymph Node Assay) according to EU Method B.42 (Skin Sensitisation: Local Lymph Node Assay)
Ambiguous
skin corrosion: in vitro / ex vivo · Screening · other guideline: OECD 431 (In Vitro Corrosion: Human Skin Model Test) according to
Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) according to EU Method B.4 (Acute Toxicity: Dermal Irritation / Corrosion) according to
Category 6.4A (Category 2A)
Eye Irritation · Read Across
Classification not possible
Eye Irritation · Screening
Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) according to EU Method B.5 (Acute Toxicity: Eye Irritation / Corrosion) according to