Names | |
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Preferred IUPAC name
N′-(3,4-Dichlorophenyl)-N,N-dimethylurea | |
Other names
3-(3,4-Dichlorophenyl)-1,1-dimethylurea, Karmex, Diuron, Direx
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Identifiers | |
3D model (JSmol)
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ChEBI | |
ChEMBL | |
ChemSpider | |
ECHA InfoCard | 100.005.778 |
EC Number |
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KEGG | |
PubChem CID
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RTECS number |
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UNII | |
UN number | 3077, 2767 |
CompTox Dashboard (EPA)
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Properties | |
C9H10Cl2N2O | |
Molar mass | 233.09 g·mol−1 |
Appearance | white crystalline solid[1] |
Density | 1.48 g/cm3 |
Melting point | 158 °C (316 °F; 431 K) |
Boiling point | 180 °C (356 °F; 453 K) |
42 mg/L | |
Vapor pressure | 0.000000002 mmHg (20°C)[1] |
Hazards | |
GHS labelling: | |
Warning | |
H302, H351, H373, H410 | |
P201, P202, P260, P264, P270, P273, P281, P301+P312, P308+P313, P314, P330, P391, P405, P501 | |
Flash point | noncombustible[1] |
NIOSH (US health exposure limits): | |
PEL (Permissible)
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none[1] |
REL (Recommended)
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TWA 10 mg/m3[1] |
IDLH (Immediate danger)
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N.D.[1] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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DCMU (3-(3,4-dichlorophenyl)-1,1-dimethylurea) is an algicide and herbicide of the aryl urea class that inhibits photosynthesis. It was introduced by Bayer in 1954 under the trade name of Diuron.