Product Identification

Product Name

1,1-Dimethyl-3-(3,4-Dichlorophenyl)urea

Synonyms

3-(3,4-Dichlorophenyl)-1,1-dimethylurea
Dichlorfenidim
Heratox

CAS

330-54-1

Formula

C9H10Cl2N2O

Molecular Weight

233.1

EINECS

206-354-4

RTECS

YS8925000

RTECS Class

Agricultural Chemical and Pesticide; Tumorigen; Mutagen; Reproductive Effector

Merck

13,3418

Beilstein/Gmelin

2215168

Beilstein Reference

4-12-00-01263

EC Index Number

006-015-00-9

EC Class

Carcinogenic Category 3; Harmful; Dangerous for the Environment

Physical and Chemical Properties

Appearance

Diuron is a white crystalline solid. It is a wettable powder.

Solubility in water

40 mg/L

Melting Point

158 - 159

Boiling Point

385

Vapor Pressure

4E-6 (25 C)

pKa/pKb

13.55 (pKa)

Partition Coefficient

2.68

Heat Of Vaporization

63.4 kJ/mol

Usage

Herbicide.

Vapor Density

8.04

Odor threshold

Odorless

First Aid Measures

Ingestion

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.

Inhalation

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.

Skin

Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.

Eyes

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.

Handling and Storage

Storage

Keep in well ventilated area.

Handling

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.

Hazards Identification

Ingestion

Nausea, vomiting, and diarrhea may be noted following ingestion.

Inhalation

INHALATION: May cause irritation of nose and throat. EYES: Irritation. SKIN: Moderately irritating to skin.

Skin

Cyanosis unresponsive to oxygen therapy may be noted in patients with methemoglobinemia due to absorption of excessive amounts of these agents.

Eyes

See inhalation

EC Risk Phrase

R 22 40 48/22 50/53

EC Safety Phrase

S 13 22 37 46 60 61

UN (DOT)

3077

Exposure Controls/Personal Protection

Personal Protection

Wear appropriate eye protection and protective clothing to prevent skin and eye contact.

Respirators

Use NIOSH/MSHA approved respirator appropriate for exposure of concern.

Exposure limit(s)

NIOSH REL: TWA 10 mg/m3

Poison Class

4

Fire Fighting Measures

Flash Point

187

Fire Fighting

Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.)

Fire Potential

Nonflammable.

Accidental Release Measures

Small spills/leaks

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.

Stability and Reactivity

Incompatibilities

Incompatible with the following: Strong acids.

Stability

Stable.

Decomposition

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.

Combustion Products

Highly toxic fumes are imminent Decomposes at 180 to 190C

Transport Information

UN Number

3077