Copper(I) oxide

Copper(I) oxide
	; Unit cell
	; Crystal packing
Names
	IUPAC name Copper(I) oxide
	Other names Cuprous oxide; Dicopper oxide; Cuprite; Red copper oxide
Identifiers
CAS Number	1317-39-1 ;
3D model (JSmol)	Interactive image; Interactive image;
ChEBI	CHEBI:81908;
ChemSpider	8488659 ;
ECHA InfoCard	100.013.883
EC Number	215-270-7;
KEGG	C18714 ;
PubChem CID	10313194;
RTECS number	GL8050000;
UNII	T8BEA5064F ;
CompTox Dashboard (EPA)	DTXSID0034489 ;
	InChI InChI=1S/2Cu.O/q2+1;-2 Key: KRFJLUBVMFXRPN-UHFFFAOYSA-N ; InChI=1/2Cu.O/rCu2O/c1-3-2 Key: BERDEBHAJNAUOM-YQWGQOGZAF; InChI=1/2Cu.O/q2+1;-2 Key: KRFJLUBVMFXRPN-UHFFFAOYAM;
	SMILES [Cu]O[Cu]; [Cu+].[Cu+].[O-2];
Properties
Chemical formula	Cu2O
Molar mass	143.09 g/mol
Appearance	brownish-red solid
Density	6.0 g/cm3
Melting point	1,232 °C (2,250 °F; 1,505 K)
Boiling point	1,800 °C (3,270 °F; 2,070 K)
Solubility in water	Insoluble
Solubility in acid	Soluble
Band gap	2.137 eV
Magnetic susceptibility (χ)	−20×10−6 cm3/mol
Structure
Crystal structure	cubic
Space group	Pn3m, #224
Lattice constant	a = 4.2696
Thermochemistry
Std molar; entropy (S⦵298)	93 J·mol−1·K−1
Std enthalpy of; formation (ΔfH⦵298)	−170 kJ·mol−1
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H318, H332, H410
Precautionary statements	P273, P305+P351+P338
NFPA 704 (fire diamond)	2 0 1
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 1 mg/m3 (as Cu)
REL (Recommended)	TWA 1 mg/m3 (as Cu)
IDLH (Immediate danger)	TWA 100 mg/m3 (as Cu)
Safety data sheet (SDS)	SIRI.org
Related compounds
Other anions	Copper(I) sulfide; Copper(II) sulfide; Copper(I) selenide
Other cations	Copper(II) oxide; Silver(I) oxide; Nickel(II) oxide; Zinc oxide
	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

Copper(I) oxide or cuprous oxide is the inorganic compound with the formula Cu₂O. It is one of the principal oxides of copper, the other being copper(II) oxide or cupric oxide (CuO). Cuprous oxide is a red-coloured solid and is a component of some antifouling paints. The compound can appear either yellow or red, depending on the size of the particles.^[3] Copper(I) oxide is found as the reddish mineral cuprite.

^ https://www.nwmissouri.edu/naturalsciences/sds/c/Copper%20I%20oxide.pdf ^{[dead link]}
^ ^a ^b ^c NIOSH Pocket Guide to Chemical Hazards. "#0150". National Institute for Occupational Safety and Health (NIOSH).
^ N. N. Greenwood, A. Earnshaw, Chemistry of the Elements, 2nd ed., Butterworth-Heinemann, Oxford, UK, 1997.

[1] ttps://www.nwmissouri.edu/naturalsciences/sds/c/Copper%20I%20oxide.pdf ^{[dead link]}

[PGCH-2] NIOSH Pocket Guide to Chemical Hazards. "#0150". National Institute for Occupational Safety and Health (NIOSH).

[3] N. N. Greenwood, A. Earnshaw, Chemistry of the Elements, 2nd ed., Butterworth-Heinemann, Oxford, UK, 1997.

[1]

[2]

[3]

Names

Unit cell
Crystal packing
IUPAC name Copper(I) oxide
Other names Cuprous oxide Dicopper oxide Cuprite Red copper oxide
Identifiers
CAS Number	1317-39-1^Y
3D model (JSmol)	Interactive image Interactive image
ChEBI	CHEBI:81908
ChemSpider	8488659^Y
ECHA InfoCard	100.013.883
EC Number	215-270-7
KEGG	C18714^Y
PubChem CID	10313194
RTECS number	GL8050000
UNII	T8BEA5064F^Y
CompTox Dashboard (EPA)	DTXSID0034489
InChI InChI=1S/2Cu.O/q2+1;-2^Y Key: KRFJLUBVMFXRPN-UHFFFAOYSA-N^Y InChI=1/2Cu.O/rCu2O/c1-3-2 Key: BERDEBHAJNAUOM-YQWGQOGZAF InChI=1/2Cu.O/q2+1;-2 Key: KRFJLUBVMFXRPN-UHFFFAOYAM
SMILES [Cu]O[Cu] [Cu+].[Cu+].[O-2]
Properties
Chemical formula	Cu₂O
Molar mass	143.09 g/mol
Appearance	brownish-red solid
Density	6.0 g/cm³
Melting point	1,232 °C (2,250 °F; 1,505 K)
Boiling point	1,800 °C (3,270 °F; 2,070 K)
Solubility in water	Insoluble
Solubility in acid	Soluble
Band gap	2.137 eV
Magnetic susceptibility (χ)	−20×10⁻⁶ cm³/mol
Structure
Crystal structure	cubic
Space group	Pn3m, #224
Lattice constant	a = 4.2696
Thermochemistry
Std molar entropy (S^⦵₂₉₈)	93 J·mol⁻¹·K⁻¹
Std enthalpy of formation (Δ_fH^⦵₂₉₈)	−170 kJ·mol⁻¹
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H318, H332, H410
Precautionary statements	P273, P305+P351+P338^[1]
NFPA 704 (fire diamond)	2 0 1
NIOSH (US health exposure limits):
PEL (Permissible)	TWA 1 mg/m³ (as Cu)^[2]
REL (Recommended)	TWA 1 mg/m³ (as Cu)^[2]
IDLH (Immediate danger)	TWA 100 mg/m³ (as Cu)^[2]
Safety data sheet (SDS)	SIRI.org
Related compounds
Other anions	Copper(I) sulfide Copper(II) sulfide Copper(I) selenide
Other cations	Copper(II) oxide Silver(I) oxide Nickel(II) oxide Zinc oxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is ^YN ?) Infobox references