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EINECS 208-431-8
CAS No. 528-29-0 Density 1.486 g/cm3
Solubility water: 150 mg/L (20 °C) Melting Point 116 °C
Formula C6H4N2O4 Boiling Point 319.9 °C at 760 mmHg
Molecular Weight 168.12 Flash Point 169.2 °C
Transport Information UN 3443 6.1/PG 2 Appearance light yellow-brown powder
Safety 28-36/37-45-60-61-28A Risk Codes 26/27/28-33-50/53
Molecular Structure Molecular Structure of 528-29-0 (1,2-Dinitrobenzene) Hazard Symbols VeryT+,DangerousN

Benzene,o-dinitro- (8CI);NSC 60682;Ortho-dinitrobenzene;o-Dinitrobenzene;


1,2-Dinitrobenzene Chemical Properties

MF: C6H4N2O4
MW: 168.11
EINECS: 208-431-8
Density: 1.486 g/cm3
Flash Point: 150 °C
Stability: Highly reactive
Melting Point: 116-119 ºC
IUPAC Name: 1,2-dinitrobenzene
Water Solubility: 150 mg/L (20 ºC)
Appearance: Colorless to yellow solid
Enthalpy of Vaporization: 53.92 kJ/mol 
Boiling Point: 319.9 °C at 760 mmHg 
Vapour Pressure: 0.000614 mmHg at 25°C  
Air & Water: Reactions Slowly mixes with water.
Synonyms: 1,2-Dinitro-benzen ; 1,2-Dinitrobenzol ; Benzene, o-dinitro- ; Benzene,1,2-dinitro- ; Benzene,1,2-dinitro-(9CI) ; Benzene,o-dinitro- ; NSC60682 ; O-dinitro-benzen
Following is the molecular structure of O-dinitrobenzen (528-29-0):


1,2-Dinitrobenzene Uses

 O-dinitrobenzen (528-29-0)is used for the synthesis of dyestuffs, dyestuff intermediates, explosives, and celluloid production.

1,2-Dinitrobenzene Production

 Reactivity Profile of O-dinitrobenzen (528-29-0): All three isomers have similar properties and may react vigorously with oxidizing materials. Their reaction with nitric acid (nitration) will lead to a mixture of trinitrobenzenes possessing high-explosive properties. If heat and reaction conditions of the nitration are not controlled, detonation comparable to TNT may occur. Mixture of 1,3-dinitrobenzene with tetranitromethane was found highly explosive. 1,2-dinitrobenzene is a severe explosion hazard when shocked or exposed to heat or flame. When heated to decomposition all dinitrobenzens emit toxic fumes of nitrogen oxides.

1,2-Dinitrobenzene Safety Profile

Suspected carcinogen. Poison by inhalation and ingestion. Moderately toxic by skin contact. Can cause liver, kidney, and central nervous system injury. Combustible when exposed to heat or flame; can react vigorously with oxidizing materials. A severe explosion hazard when shocked or exposed to heat or flame. It is used in bursting charges and to fill artillery shells. Mixtures with nitric acid are highly explosive. To fight fire, use water, CO2, dry chemical. Dangerous; when heated to decomposition it emits highly toxic fumes of NOx and explodes.
Safety Information of O-dinitrobenzen (528-29-0):
Hazard Codes: T+,N
T+: Very Toxic  N: Dangerous for the environment
Risk Statements: 26/27/28-33-50/53
26/27/28: Very Toxic by inhalation, in contact with skin and if swallowed
33:  Danger of cumulative effects 
50/53: Very Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment   
Safety Statements: 28-36/37-45-60-61-28A
28: After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer
36/37: Wear suitable protective clothing and gloves 
45: In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) 
60: This material and/or its container must be disposed of as hazardous waste 
61: Avoid release to the environment. Refer to special instructions safety data sheet 
RIDADR: UN 3443 6.1/PG 2
WGK Germany: 3
RTECS: CZ7450000
HazardClass: 6.1(a)
PackingGroup: II
HS Code: 29042000

1,2-Dinitrobenzene Standards and Recommendations

OSHA PEL: TWA 1 mg/m3 (skin)
ACGIH TLV: TWA 0.15 ppm (skin)
DFG MAK: Confirmed Animal Carcinogen with Unknown Relevance to Humans
DOT Classification:  6.1; Label: Poison

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