Title: Dinitrobenzene
Molecular Formula: C6H4N2O4
Molecular Weight: 168.11
Percent Composition: C 42.87%, H 2.40%, N 16.66%, O 38.07%
Literature References: Commercial product usually consists of a mixture of the m, o and p isomers. Toxicity study: T. E. Cody et al., J. Toxicol. Environ. Health 7, 829 (1981). Review of toxicology and human exposure: Toxicological Profile for 1,3-Dinitrobenzene and 1,3,5-Trinitrobenzene (PB95-264289, 1995) 178 pp.
Derivative Type: m-Dinitrobenzene
CAS Registry Number: 99-65-0
Additional Names: 1,3- Dinitrobenzene
Properties: Yellowish crystals. mp 89-90°. bp 300-303°. Volatile with steam. One gram dissolves in 2000 ml cold water, 320 ml boiling water, 37 ml alc, 20 ml boiling alcohol; freely sol in benzene, chloroform, ethyl acetate. LD50 in male, female rats (mg/kg): 91, 81 orally (Cody).
Melting point: mp 89-90°
Boiling point: bp 300-303°
Toxicity data: LD50 in male, female rats (mg/kg): 91, 81 orally (Cody)
Derivative Type: o-Dinitrobenzene
CAS Registry Number: 528-29-0
Additional Names: 1,2- Dinitrobenzene
Properties: White crystals. d 1.57. mp 118°. bp 319°. Volatile with steam. One gram dissolves in 6600 ml cold water, 2700 ml boiling water, about 60 ml alc, 3 ml boiling alc, 20 ml benzene; freely sol in chloroform, ethyl acetate.
Melting point: mp 118°
Boiling point: bp 319°
Density: d 1.57
Derivative Type: p-Dinitrobenzene
CAS Registry Number: 100-25-4
Additional Names: 1,4- Dinitrobenzene
Properties: White crystals; sublimable. d 1.63. mp 173-174°. bp 299°. Volatile with steam. One gram dissolves in 12,500 ml cold water, 555 ml boiling water, 300 ml alcohol; sparingly soluble in benzene, chloroform, ethyl acetate.
Melting point: mp 173-174°
Boiling point: bp 299°
Density: d 1.63
CAUTION: Potential symptoms of overexposure include methemoglobinemia, headache, nausea, dizziness, general malaise (See Toxicological Profile); anoxia, cyanosis; visual disturbances, central scotomas; bad taste, burning mouth, dry throat, thirst; yellowing hair, eyes, skin; anemia; liver damage. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p. 116-119.
Use: Manuf of dyes, dye intermediates, explosives, plastics.
Dinitrocresol Dinobuton Dinocap Dinoseb Dinosterol

Dinitrobenzenes are chemical compounds composed of a benzene ring and two nitro group (-NO2) substituents. The three possible arrangements of the nitro groups afford three isomers, 1,2-dinitrobenzene, 1,3-dinitrobenzene, and 1,4-dinitrobenzene. Each isomer has the chemical formula C6H4N2O4 and a molar mass of about 168.11 g/mol. 1,3-Dinitrobenzene is the most common isomer and it is used in the manufacture of explosives.