Title: Benzamide
CAS Registry Number: 55-21-0
Additional Names: Benzoylamide
Molecular Formula: C7H7NO
Molecular Weight: 121.14
Percent Composition: C 69.40%, H 5.82%, N 11.56%, O 13.21%
Line Formula: C6H5CONH2
Literature References: Prepd from benzoyl chloride and ammonium carbonate. Lab prepn: Gattermann-Wieland, Praxis des Organischen Chemikers (de Gruyter, Berlin, 40th ed., 1961) p 119. Alternate procedure using concd ammonia soln: A. I. Vogel, Practical Organic Chemistry (Longmans, London, 3rd ed., 1959) p 797.
Properties: Crystals. d4 1.341. mp 130°. bp 288°. One gram dissolves in 74 ml water, more sol in boiling water, in 6 ml alc, 3.3 ml pyridine. Sol in hot benzene, slightly in ether; sol in ammonia with formation of a small quantity of benzonitrile.
Melting point: mp 130°
Boiling point: bp 288°
Density: d4 1.341
Derivative Type: N-Chloro deriv
Properties: mp 116°. Sol in water; insol in alcohol or benzene.
Melting point: mp 116°
Benzanilide Benzanthrone Benzarone Benzathine Benzbromarone

Skeletal formula
Ball-and-stick model
CAS number 55-21-0 YesY
PubChem 2331
ChemSpider 2241 YesY
UNII 6X80438640 YesY
EC number 200-227-7
KEGG C09815 YesY
ChEBI CHEBI:28179 YesY
RTECS number CU8700000
Jmol-3D images Image 1
Image 2
Molecular formula C7H7NO
Molar mass 121.14 g mol−1
Appearance Off-white solid
Density 1.341 g/cm3
Melting point 127 - 130 °C
Boiling point 288 °C; 550 °F; 561 K
Solubility in water 13 g/l
Acidity (pKa) 23.35 (in DMSO)
EU classification Harmful (Xn)
R-phrases R22 R40
S-phrases S36/37/39
NFPA 704
NFPA 704.svg
Flash point 180 °C; 356 °F; 453 K
Autoignition temperature > 500 °C
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Benzamide is an off-white solid with the chemical formula of C6H5CONH2. It is a derivative of benzoic acid. It is slightly soluble in water, and soluble in many organic solvents.