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MAGNESIUM ARSENIDE

Product Name
MAGNESIUM ARSENIDE
CAS No.
12044-49-4
Chemical Name
MAGNESIUM ARSENIDE
Synonyms
MAGNESIUM ARSENIDE;trimagnesium diarsenide;Magnesium arsenide (Mg3As2);MAGNESIUM ARSENIDE, 99.5% (METALS BASIS);Magnesium arsenide, 99.5% trace metals basis
CBNumber
CB2488404
Molecular Formula
AsH2Mg
Formula Weight
101.24
MOL File
12044-49-4.mol
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MAGNESIUM ARSENIDE Property

Melting point:
800°C
Density 
3.148
solubility 
insoluble in H2O
form 
solid
Sensitive 
Moisture Sensitive
CAS DataBase Reference
12044-49-4
EPA Substance Registry System
Magnesium arsenide (Mg3As2) (12044-49-4)
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Safety

RIDADR 
UN1557
TSCA 
Yes
HazardClass 
6.1
PackingGroup 
II
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H301Toxic if swalloed

H331Toxic if inhaled

H400Very toxic to aquatic life

H410Very toxic to aquatic life with long lasting effects

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P405Store locked up.

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MAGNESIUM ARSENIDE Chemical Properties,Usage,Production

Description

Magnesium arsenide has the molecular formula of Mg3As2 and the molecular weight of 223.6592 g/mol. It may be prepared by direct reaction between the elements. Since As sublimes at 614°C and Mg melts at 650°C, the latter is melted at about 675°C in an inert atmosphere like argon (not N2 which would form nitrides) and arsenic vapors are carried into the reaction zone by a stream of Ar gas:
3Mg + 2As + heat ? Mg3As2
Mg3As2 is obtained by this method as a deep-brown, X-ray amorphous powder. Magnesium arsenide has the CAS number of 12044-49-4. This compound decomposes in contact with water:
Mg3As2 + 3H2O ? 2AsH3 + 3Mg(OH)2
Thus, it must be stored under dry conditions. Its density is 3.15 g/cm3. This compound is dimorphic with the low temperature form, β-Mg3As2 being cubic (α = 12.33?) and the high-temperature form, α-Mg3As2 being hexagonal. It crystallizes in the anti-La2O3 crystal structure, with unit-cell parameters of: a = 4.264A ° , c = 6.738?, c/a = 1.580. Both of these compounds are semiconductors. The latter has a band gap, Eg, of 2.2eV (564 nm).

Uses

The structure of magnesium arsenide is not ionic but covalent. Magnesium arsenide was used as a rodenticide and insecticide. Its toxicity to humans has led to its prohibition in the US and Europe.

MAGNESIUM ARSENIDE Preparation Products And Raw materials

Raw materials

Preparation Products

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MAGNESIUM ARSENIDE Suppliers

3B Pharmachem (Wuhan) International Co.,Ltd.
Tel
821-50328103-801 18930552037
Fax
86-21-50328109
Email
3bsc@sina.com
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China
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Alfa Aesar
Tel
400-6106006
Fax
021-67582001/03/05
Email
saleschina@alfa-asia.com
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China
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30123
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Energy Chemical
Tel
021-021-58432009 400-005-6266
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021-58436166
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sales8178@energy-chemical.com
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Beijing HuaMeiHuLiBiological Chemical
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010-56205725
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010-65763397
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waley188@sohu.com
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China
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Guangzhou Jhd Chemical Reagent Co., Ltd.
Tel
020-84383047
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020-84380294
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sales@jhd.com.cn
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Hubei Jusheng Technology Co.,Ltd.
Tel
18871490254
Fax
027-59599243
Email
linda@hubeijusheng.com
Country
CHINA
ProdList
28172
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12044-49-4, MAGNESIUM ARSENIDERelated Search:


  • MAGNESIUM ARSENIDE
  • MAGNESIUM ARSENIDE, 99.5% (METALS BASIS)
  • trimagnesium diarsenide
  • Magnesium arsenide, 99.5% trace metals basis
  • Magnesium arsenide (Mg3As2)
  • 12044-49-4
  • Mg3As2
  • As2Mg3