Manganese dioxide
Agent Name
Manganese dioxide
CAS Number
1313-13-9
Formula
Mn-O2
Major Category
Metals
Synonyms
BOG manganese; Black manganese oxide; Braunstein [German]; Bruinsteen [Dutch]; C.I. 77728; C.I. Pigment Black 14; C.I. Pigment Brown 8; Cement Black; Mangaanbioxyde [Dutch]; Mangaandioxyde [Dutch]; Mangandioxid [German]; Manganese (biossido di) [Italian]; Manganese (bioxyd de) [French]; Manganese (diossido di) [Italian]; Manganese (dioxyde de) [French]; Manganese Black; Manganese binoxide; Manganese dioxide; Manganese peroxide; Manganese superoxide; Manganese(IV) oxide; Pyrolusite Brown; Manganese dioxide, ore of Chapter 26; Manganese oxide (MnO2); [ChemIDplus]
Category
Manganese Compounds, Inorganic
Description
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]
Sources/Uses
Naturally occurs as the mineral pyrolusite, which is the source of manganese and all its compounds; Used to make manganese steel, as an oxidizer, in dry cell alkaline batteries, for making amethyst glass, decolorizing glass, and painting on porcelain, faience, and majolica; The precipitate is used in electrotechnics, pigments, browning gun barrels, as drier for paints and varnishes, and for printing and dyeing textiles; [Merck Index] See "Manganese."
Comments
Inhalation of dust may cause diseases of the lungs (bronchitis and pneumonia) and CNS (manganism); [ICSC] A strong oxidizer; [Merck Index] Harmful by ingestion, inhalation; May cause irritation; [Alfa Aesar MSDS] See "Manganese" and linked occupational diseases.
Biomedical References
Exposure Assessment
TLV (ACGIH)
0.02 mg/m3, as Mn (respirable fraction), 0.1 mg/m3, as Mn (inhalable fraction)
PEL (OSHA)
Ceiling(OSHA)=5 mg/m3, as Mn
MAK
0.2 mg/m3, as Mn (inhalable fraction), 0.02 mg/m3, as Mn (respirable fraction)
Explanatory Notes
mp = 995 deg F; VP = approximately zero; [CHEMINFO]
Adverse Effects
Neurotoxin
Parkinsonism
Hepatotoxin
Hepatoxic (a) from occupational exposure (secondary effect) or (b) in animal studies or in humans after ingestion
Diseases, Processes, and Activities Linked to This Agent
Diseases
Occupational diseases associated with exposure to this agent:
Processes
Industrial Processes with risk of exposure: