12255-53-7
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Basic information
- Product Name: tricalcium diarsenide
- Synonyms: tricalcium diarsenide;CALCIUM ARSENIDE
- CAS NO:12255-53-7
- Molecular Formula: As2Ca3
- Molecular Weight: 270.0772
- EINECS: 235-509-9
- Product Categories: N/A
- Mol File: 12255-53-7.mol
- Article Data: 0
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Chemical Properties
- Melting Point: N/A
- Boiling Point: °Cat760mmHg
- Flash Point: °C
- Appearance: /
- Density: g/cm3
- Refractive Index: N/A
- Storage Temp.: N/A
- Solubility: N/A
- CAS DataBase Reference: tricalcium diarsenide(CAS DataBase Reference)
- NIST Chemistry Reference: tricalcium diarsenide(12255-53-7)
- EPA Substance Registry System: tricalcium diarsenide(12255-53-7)
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Safety Data
- Hazard Codes: N/A
- Statements: N/A
- Safety Statements: N/A
- WGK Germany:
- RTECS:
- HazardClass: N/A
- PackingGroup: N/A
- Hazardous Substances Data: 12255-53-7(Hazardous Substances Data)
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12255-53-7 Usage
Description
Calcium arsenide has the molecular formula of Ca3As2 and the molecular weight of 270.0772 g/mol. It may be prepared by reacting the elements together. Since As sublimes at 614°C and Ca melts at 839°C, the latter is melted at about 875°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: 3Ca + 2As + heat ? Ca3As2 Its CAS number is 12255-53-7. The standard Gibbs energies of formation of Ca3As2 was determined by a chemical equilibration technique yielding the following results: 3Ca + 2As ? Ca3As2 (solid) △G°= -723,800 + 172.8T (J/mol) (T = 1273 to 1573 K) Calcium arsenide has the zinc-blende (cubic) structure with a = 6.751 ? . It can also be prepared by the reduction of calcium arsenate by carbon: 2Ca3AsO4 + 5C + heat ? Ca3As2 + 2CaO + 3CO2Check Digit Verification of cas no
The CAS Registry Mumber 12255-53-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,2,2,5 and 5 respectively; the second part has 2 digits, 5 and 3 respectively.Calculate Digit Verification of CAS Registry Number 12255-53:
(7*1)+(6*2)+(5*2)+(4*5)+(3*5)+(2*5)+(1*3)=77
77 % 10 = 7
So 12255-53-7 is a valid CAS Registry Number.
InChI:InChI=1/6As2H.3Ca/c6*1-2;;;/h6*1H;;;/q6*-1;3*+2
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tricalcium diarsenide
