Home Categories Inorganic chemistry Manganese dioxide
A5348312

Manganese dioxide , 99.95%metalsbasis , 1313-13-9

Synonym(s):
Birnessite manganese dioxide (δ-MnO2);Manganese dioxide;Manganese dioxide, Pyrolusite;Manganese(IV) oxide

CAS NO.:1313-13-9

Empirical Formula: MnO2

Molecular Weight: 86.94

MDL number: MFCD00003463

EINECS: 215-202-6

Pack Size Price Stock Quantity
5G RMB101.60 In Stock
25G RMB391.20 In Stock
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Update time: 2022-07-08

PRODUCT Properties

Melting point: 535 °C (dec.) (lit.)
Density  5.02
vapor pressure  0-0Pa at 25℃
storage temp.  Store below +30°C.
solubility  <0.001g/l insoluble
form  powder
color  gray
Specific Gravity 5.026
Water Solubility  insoluble
Crystal Structure Rutile type
crystal system square
Merck  14,5730
Space group P42/mnm
Lattice constant
a/nmb/nmc/nmα/oβ/oγ/oV/nm3
0.43980.43980.28739090900.0556

Exposure limits ACGIH: TWA 0.02 mg/m3; TWA 0.1 mg/m3
OSHA: Ceiling 5 mg/m3
NIOSH: IDLH 500 mg/m3; TWA 1 mg/m3; STEL 3 mg/m3
Stability: Stable. Incompatible with strong acids, strong reducing agents, organic materials.
InChIKey NUJOXMJBOLGQSY-UHFFFAOYSA-N

Description and Uses

Manganese dioxide is a black crystalline solid. Molecular weight= 86.94; Freezing/Melting point=(decomposes)=53℃. Hazard Identification (based on NFPA-704 M Rating System): Health 3, Flammability 0, Reactivity×(Oxidizer). Insoluble in water.

Manganese(IV) oxide is the most important ore of manganese from which the metal is mostly manufactured. The oxide occurs in nature as the mineral pyrolusite as heavy gray lumps, or black when powdered.
The mineral is used to produce manganese metal, most manganese salts, and also manganese steel and other alloys. The metallurgical applications of manganese(IV) oxide mainly involve making ferromanganese and special manganese alloys. Another important application of manganese(IV) oxide is in manufacturing dry-cell batteries and alkaline cells. The oxide also is a colorant in brick, tile, porcelain and glass; a drier for paints and varnishes; a 552 MANGANESE(IV) OXIDEpreparation for printing and dyeing textiles; a curing agent for polysulfide rubbers; an adsorbent for hydrogen sulfide and sulfur dioxide; an oxidizing agent in many organic syntheses such as quinone and hydroquinone; and a catalyst in laboratory preparation of oxygen from potassium chlorate. Manganese(IV) oxide also is used to make welding rods and fluxes, and ceramic magnets (ferrites); and is an additive to fertilizers.

Safety

Symbol(GHS) 
GHS07,GHS08
Signal word  Warning
Hazard statements  H302+H332-H373
Precautionary statements  P260-P264-P270-P301+P312-P304+P340+P312-P314
Hazard Codes  Xn
Risk Statements  20/22
Safety Statements  25
RIDADR  3137
WGK Germany  1
RTECS  OP0350000
TSCA  Yes
HS Code  2820 10 00
PackingGroup  III
Toxicity LD50 orally in rats: >40 mmole/kg (Holbrook)

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