Linuron

  • 3-(3,4-Dichlorophenyl)-1-methoxymethylurea
  • Herbicide 326
  • 1-Methoxy-1-methyl-3-(3,4-dichlorophenyl)urea
  • Urea, N'-(3,4-dichlorophenyl)-N-methoxy-n-methyl
  • Urea, 3-(3,4-dichlorophenyl)-1-methoxy-1-methyl
Formula
C9H10Cl2N2O2
Structure
Description
Colorless crystals.
Uses
Herbicide.

Registry Numbers and Inventories.
CAS
330-55-2
EC (EINECS/ELINCS)
206-356-5
EC Index Number
006-021-00-1
EC Class
Carcinogenic Category 3; Harmful; Dangerous for the Environment
RTECS
YS9100000
RTECS class
Agricultural Chemical and Pesticide; Mutagen
Merck
12,5534
Beilstein/Gmelin
2128725
EPA OPP
35506
Swiss Giftliste 1
G-2002
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C9H10Cl2N2O2
Formula mass
249.1
Melting point, °C
93 - 94
Vapor pressure, mmHg
1E-6 (25 C)
Density
1.49 g/cm3 (20 C)
Solubility in water
75 mg/L (25 C)
pKa/pKb
12.13 (pKa)
Partition coefficient, pKow
3.20

Hazards and Protection.
Storage
Store in cool, dry place.
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.
Protection
Chemical splash goggles in compliance with OSHA regulations are advised; however, OSHA regulations also permit other type safety glasses. Whre chemical resistant gloves. To prevent repeated or prolonged skin contact, wear impervious clothing and boots.
Respirators
Use NIOSH/MSHA approved respirator appropriate for exposure of concern.
Small spills/leaks
Evacuate area and ventilate. Wear protective equipment. If required, use an inert absrobent. Sweep up and place in an appropriate container for disposal. Wash contaminated surfaces.
Stability
It is stable at its melting point and in neutral aqueous media. Dry formulations are stable under normal storage conditions. Hydrolyzed slowly by acids and alkalis at normal temperatures, and more rapidly at higher temperatures.
Incompatibilities
Strong oxidizing agents.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use agent most appropriate to extinguish fire.

Health.
Poison_Class
4
Exposure effects
   Ingestion
Nausea, vomiting, and diarrhea may be noted following ingestion.
   Skin
Cyanosis unresponsive to oxygen therapy may be noted in patients with methemoglobinemia due to absorption of excessive amounts of these agents.

First aid
 
   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.

Transport.