Monuron

  • Chlorea
  • 3-(p-Chlorophenyl)-1,1-dimethylurea
  • n-(4-Chlorophenyl)-N',N'-dimethylurea
  • N-para-Chlorophenyl-N',N'-dimethylurea
  • 1-para-Chlorophenyl-3,3-dimethylurea
  • 3-para-Chlorophenyl-1,1-dimethylurea
Formula
C9H11ClN2O
Structure
Description
White crystalline solid or white powder with a slight odor.
Uses
Herbicide.

Registry Numbers and Inventories.
CAS
150-68-5
EC (EINECS/ELINCS)
205-766-1
EC Index Number
006-042-00-6
EC Class
Carcinogenic Category 3; Harmful; Dangerous for the Environment
R 22 40 50/53
S 36/37 60 61
RTECS
YS6300000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Mutagen; Reproductive Effector
Merck
12,6342
Beilstein/Gmelin
2097922
Beilstein Reference
4-12-00-01191
EPA OPP
35501
Swiss Giftliste 1
G-2059
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C9H11ClN2O
Formula mass
198.65
Boiling point, °C
359
Vapor pressure, mmHg
3E-5 (25 C)
Density
1.27 g/cm3 (20 C)
Solubility in water
230 ppm
Partition coefficient, pKow
1.94
Heat of vaporization
60.4 kJ/mol

Hazards and Protection.
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.
Protection
Protect skin and hair. Use only approved respiratory protective equipment, when label directions advise need. Wear rubber gloves for all handling.
Respirators
Wear a NIOSH-approved half face respirator equipped with a combination filter cartridge, i.e. organic vapor/acid gas/HEPA (specific for organic vapors, HCl, acid gas, SO2 and a high efficiency particulate filter).
Small spills/leaks
Should a spill occur while you are handling this chemical, FIRST REMOVE ALL SOURCES OF IGNITION, then you should dampen the solid spill material with 60-70% ethanol and transfer the dampened material to a suitable container. Use absorbent paper dampened with 60-70% ethanol to pick up any remaining material. Seal the absorbent paper, and any of your clothes, which may be contaminated, in a vapor-tight plastic bag for eventual disposal. Solvent wash all contaminated surfaces with 60-70% ethanol followed by washing with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.
Stability
No data.
Incompatibilities
May react with azo and diazo compounds to generate toxic gases May react with strong reducing agents to generate flammable gases Reacts as a weak base.

Fire.
Flash Point,°C
171
Fire fighting
Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher.
Fire potential
This material is probably combustible.

Health.
Poison_Class
4
Exposure effects
   Ingestion
Nausea, vomiting, and diarrhea may be noted following ingestion.
   Inhalation
Symptoms of exposure to this compound may include fall in blood pressure, convulsions or coma. Other symptoms may include ataxia, drowsiness, hyporeflexia, pallor, tachypnea, dacryorrhea, aciduria, diarrhea, epistaxis, hyperreflexia and irritability.
   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

First aid
 
   Ingestion
DO NOT INDUCE VOMITING. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. Be prepared to transport the victim to a hospital if advised by a physician. If the victim is convulsing or unconscious, do not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport the victim to a hospital.
   Inhalation
IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. IMMEDIATELY call a physician and be prepared to transport the victim to a hospital even if no symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used.
   Skin
IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.
   Eyes
First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

Transport.