4-Nitrobenzaldehyde

4-Nitrobenzaldehyde
Names
	Preferred IUPAC name 4-Nitrobenzaldehyde
	Other names p-Nitrobenzaldehyde
Properties
Chemical formula	C7H5NO3
Molar mass	151.121 g·mol−1
Appearance	slightly yellowish crystalline powder
Density	1.546 g/cm3
Melting point	103 to 106 °C (217 to 223 °F; 376 to 379 K)
Boiling point	300 °C (572 °F; 573 K)
Magnetic susceptibility (χ)	−66.57·10−6 cm3/mol
Identifiers
CAS Number	555-16-8 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:66926 ;
ChEMBL	ChEMBL164236 ;
ChemSpider	526 ;
ECHA InfoCard	100.008.259
PubChem CID	541;
UNII	NX859P8MB0 ;
CompTox Dashboard (EPA)	DTXSID5022061 ;
	InChI InChI=1S/C7H5NO3/c9-5-6-1-3-7(4-2-6)8(10)11/h1-5H Key: BXRFQSNOROATLV-UHFFFAOYSA-N ; InChI=1/C7H5NO3/c9-5-6-1-3-7(4-2-6)8(10)11/h1-5H Key: BXRFQSNOROATLV-UHFFFAOYAO;
	SMILES O=[N+]([O-])c1ccc(C=O)cc1;
Hazards
	GHS labelling:
Pictograms
Hazard statements	H317, H319
Precautionary statements	P280, P305+P351+P338
	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

4-Nitrobenzaldehyde is an organic compound with the formula O₂NC₆H₄CHO. It is one of three isomers of nitrobenzaldehyde. It contains a nitro group para-substituted to an aldehyde.

4-Nitrobenzaldehyde is obtained by oxidation of 4-nitrotoluene or hydrolysis of 4-nitrobenzalbromide:

O₂NC₆H₄CHBr₂ + H₂O → O₂NC₆H₄CHO + 2 HBr

In the laboratory, the oxidation is achieved with chromium(VI) oxide in acetic anhydride, which affords nitrobenzyldiacetate.