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A5387612

Manganese , SP, powder , 7439-96-5

CAS NO.:7439-96-5

Empirical Formula: Mn

Molecular Weight: 54.94

MDL number: MFCD00011111

EINECS: 231-105-1

Update time: 2022-07-08

PRODUCT Properties

Melting point: 1244 °C (lit.)
Boiling point: 1962 °C (lit.)
Density  7.3 g/mL at 25 °C (lit.)
vapor pressure  0-0Pa at 20℃
Flash point: 450℃
storage temp.  no restrictions.
solubility  H2O: soluble
form  Powder
Specific Gravity 7.2
color  Gray-brown to brown-black
PH <1 (H2O, 20°C)
Resistivity 185 μΩ-cm, 20°C
Water Solubility  Soluble in diluted acids. Insoluble in water.
Merck  13,5745
Exposure limits Ceiling: 5 mg(Mn)/m3 (ACGIH and OSHA) TWA: 1 mg(Mn)/m3 (NIOSH).
Stability: Stable. Incompatible with water, strong oxidizing agents, strong acids, phosphorus.
InChIKey PWHULOQIROXLJO-UHFFFAOYSA-N

Description and Uses

Manganese occurs as a free element in nature and is ubiquitous in the environment. The origin and uses of this black mineral date back to the Greek golden period. Manganese was known as pyrolusite or manganese dioxide. A Swedish chemist, Carl Wilhelm Scheele, used pyrolusite to produce chlorine in the mid-eighteenth century. But not until 1774 was manganese isolated and purified as a metal by Johan Gottlieb Gahn by reducing the dioxide with carbon. Manganese is an essential element for humans and animals.

Manganese is a constituent of many alloys.It is used in the manufacture of steel. Certainmanganese compounds, such as, thefungicide, Maneb, the contrasting agent mangafodipirtrisodiumin nuclear magnetic resonancetomography for diagnostic imagingand the gasoline additive anti-knock agent,methylcyclopentadienyl manganese tricarbonyl(MMT) have been introduced into themarket in recent years.
Manganese is an essential trace elementneeded for many enzymatic reactions. Itsdeficiency is associated with growth retardation,changes in circulating HDL cholesteroland glucose levels and reproductive failure.Bone deformities have also been observedin certain animals deficient in manganese.Its deficiency, however is rarely found inhumans. Manganese is toxic at high dosesor chronic exposure. Manganese toxicity canoccur in certain occupational settings throughinhalation of its dust.

Safety

Symbol(GHS) 
GHS02
Signal word  Warning
Hazard statements  H228
Precautionary statements  P210-P240-P241-P280-P370+P378
Hazard Codes  F,Xi,T,C
Risk Statements  36/38-15-11-34-23/24/25-2017/11/15
Safety Statements  45-43-26-36-36/37/39-27
OEB C
OEL TWA: 1 mg/m3, STEL: 3 mg/m3 [*Note: Also see specific listings for Manganese cyclopentadienyl tricarbonyl, Methyl cyclopentadienyl manganese tricarbonyl, and Manganese tetroxide.]
RIDADR  UN 3264 8/PG 3
WGK Germany  2
RTECS  OO9625000
TSCA  Yes
HS Code  8111 00 11
HazardClass  8
PackingGroup  III
Toxicity LD50 orally in Rabbit: 9000 mg/kg
IDLA 500 mg Mn/m3

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