Diuron is a white crystalline solid. It is a wettable powder.
Registry Numbers and Inventories.
EC Index Number
Carcinogenic Category 3; Harmful; Dangerous for the Environment
R 22 40 48/22 50/53
S 13 22 37 46 60 61
Agricultural Chemical and Pesticide; Tumorigen; Mutagen; Reproductive Effector
Swiss Giftliste 1
Japan ENCS (MITI)
Melting point, °C
158 - 159
Boiling point, °C
Decomposition point, °C
Vapor pressure, mmHg
4E-6 (25 C)
Vapor density (air=1)
Odor Threshold Odor threshold Odorless
Solubility in water
Partition coefficient, pKow
Heat of vaporization
Hazards and Protection.
Keep in well ventilated area.
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Wear appropriate eye protection and protective clothing to prevent skin and eye contact.
Use NIOSH/MSHA approved respirator appropriate for exposure of concern.
Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water. Water spill: If dissolved, in region of 10 ppm or greater concentration, apply activated carbon at ten times the spilled amount. Use mechanical dredges or lifts to remove immobilized masses of pollutants and precipitates.
Incompatible with the following: Strong acids.
Diuron, stable under normal conditions, decomposed on heating to 180 to 190 C giving dimethylamine and 3,4-dichlorophenylisocyanate. When heated to decomposition it emits highly toxic fumes of hydrogen chloride and nitrogen oxides.
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.)
Highly toxic fumes are imminent Decomposes at 180 to 190C
NIOSH REL: TWA 10 mg/m3
Nausea, vomiting, and diarrhea may be noted following ingestion.
INHALATION: May cause irritation of nose and throat. EYES: Irritation. SKIN: Moderately irritating to skin.
Cyanosis unresponsive to oxygen therapy may be noted in patients with methemoglobinemia due to absorption of excessive amounts of these agents.
Seek medical attention. If individual is drowsy or unconscious, do not give anything by mouth; place individual on the left side with the head down. Contact a physician, medical facility, or poison control center for advice about whether to induce vomiting. If possible, do not leave individual unattended.
If symptoms develop, move individual away from exposure and into fresh air. If symptoms persist, seek medical attention. If breathing is difficult, administer oxygen. Keep person warm and quiet; seek immediate medical attention.
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.
USCG CHRIS Code
Std. Transport #