Beryllium carbide

Beryllium carbide
Names
	IUPAC name Beryllium carbide
	Other names Beryllium methanide
Identifiers
CAS Number	506-66-1 ;
3D model (JSmol)	Interactive image;
ChemSpider	61480 ;
ECHA InfoCard	100.007.319
EC Number	208-050-7;
PubChem CID	68173;
UNII	F5D2F26ONX ;
CompTox Dashboard (EPA)	DTXSID6060137 ;
	InChI InChI=1S/C.2Be Key: UQVOJETYKFAIRZ-UHFFFAOYSA-N ;
	SMILES [Be]=C=[Be];
Properties
Chemical formula	Be2C
Molar mass	30.035 g·mol−1
Appearance	Yellow to red crystals
Odor	odorless
Density	1.90 g/cm3 (at 15 °C)
Melting point	2,100 °C (3,810 °F; 2,370 K) (decomposes)
Solubility in water	decomposes
Structure
Crystal structure	cubic
Hazards
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 0.002 mg/m3; C 0.005 mg/m3 (30 minutes), with a maximum peak of 0.025 mg/m3 (as Be)
REL (Recommended)	Ca C 0.0005 mg/m3 (as Be)
IDLH (Immediate danger)	Ca [4 mg/m3 (as Be)]
Related compounds
Related compounds	Boron carbide; Aluminium carbide; Silicon carbide; Carbon dioxide; Carbon diselenide; Carbon disulfide;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Beryllium carbide is a chemical compound with the chemical formula Be₂C. It is a metal carbide.^[2] Similar to diamond, it is a very hard compound. It is used in nuclear reactors as a core material.

Preparation

Beryllium carbide is prepared by heating the elements beryllium and carbon at elevated temperatures (above 950°C). It also may be prepared by reduction of beryllium oxide with carbon at a temperature above 1,500°C:

2 BeO + 3 C → Be₂C + 2 CO

Beryllium carbide decomposes very slowly in water and forms methane gas:

Be₂C + 2 H₂O → 2 BeO + CH₄

The rate of decomposition is faster in mineral acids with evolution of methane.

Be₂C + 4 H⁺ → 2 Be²⁺ + CH₄

In hot concentrated alkali the reaction is very rapid, forming alkali metal beryllates and methane:

Be₂C + 4 OH⁻ → 2 BeO2−2 + CH₄

References

^ ^a ^b ^c NIOSH Pocket Guide to Chemical Hazards. "#0054". National Institute for Occupational Safety and Health (NIOSH).
^ "Beryllium Carbide". American Elements. Retrieved 25 June 2023.

External links

This inorganic compound–related article is a stub. You can help Wikipedia by expanding it.

[PGCH-1] NIOSH Pocket Guide to Chemical Hazards. "#0054". National Institute for Occupational Safety and Health (NIOSH).

[2] "Beryllium Carbide". American Elements. Retrieved 25 June 2023.

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Beryllium carbide

Contents

Preparation

See also

References

External links

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