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
- Molecular Weight:
- 101.24
- MDL Number:
- MFCD00049972
- MOL File:
- 12044-49-4.mol
| 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) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |   GHS06,GHS09 |
|---|---|
| Signal word | Danger |
| Hazard statements | H301-H331-H400-H410 |
| Precautionary statements | P261-P301+P310a-P304+P340-P311a-P405-P501a |
| RIDADR | UN1557 |
| TSCA | Yes |
| HazardClass | 6.1 |
| PackingGroup | II |
MAGNESIUM ARSENIDE Chemical Properties,Uses,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
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Hubei Jusheng Technology Co.,Ltd. | 18871490254 | linda@hubeijusheng.com | CHINA | 28172 | 58 |
| 3B Pharmachem (Wuhan) International Co.,Ltd. | 821-50328103-801 18930552037 | 3bsc@sina.com | China | 15839 | 69 |
| Alfa Aesar | 400-6106006 | saleschina@alfa-asia.com | China | 30123 | 84 |
| Energy Chemical | 021-021-58432009 400-005-6266 | sales8178@energy-chemical.com | China | 44688 | 61 |
| Beijing HuaMeiHuLiBiological Chemical | 010-56205725 | waley188@sohu.com | China | 12335 | 58 |
| Guangzhou Jhd Chemical Reagent Co., Ltd. | 020-84383047 | sales@jhd.com.cn | China | 9186 | 65 |