Chlorpyrifos Methyl

  • O,O-Dimethyl O-3,5,6-trichloro-2-pyridyl phosphorodithioate
Formula
C7H7Cl3NO3PS
Structure
Description
Colorless crystals with an ammonia-like odor.
Uses
Insecticide.

Registry Numbers and Inventories.
CAS
5598-13-0
EC (EINECS/ELINCS)
227-011-5
EC Index Number
015-186-00-9
RTECS
TG0700000
RTECS class
Agricultural Chemical and Pesticide; Primary Irritant
Beilstein/Gmelin
1541078
EPA OPP
59102
Swiss Giftliste 1
G-4942
Austrailia AICS
Listed
New Zealand
Listed
Korea ECL
Listed

Properties.
Formula
C7H7Cl3NO3PS
Formula mass
322.53
Melting point, °C
45.5-46.5
Vapor pressure, mmHg
5
Vapor density (air=1)
N/R
Partition coefficient, pKow
4.37

Hazards and Protection.
Storage
Keep in a tightly closed container in a cool, dry location.
Handling
Material should only be used by properly trained individuals. Avoid contact with skin, eyes and clothing. Do not wear contact lenses. This material is for laboratory use only. Only used in a chemical 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
OSHA approved respirator.
Small spills/leaks
Evacuate area and ventilate. While wearing protective equipment, sweep up and place in an appropriate container for disposal. Wash contaminated surfaces to remove residues.
Stability
Stable under normal temperature and pressure.
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
Fatal.
   Inhalation
Fatal, possible cholinesterase inhibitor. Seasures, nausea, vomiting, airway ubstraction and or increased mucous secreations in the lungs.
   Skin
Fatal if absorbed.

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. Wash exposed area with soap and water. If symptoms persist, seek medical attention. Launder clothing before reuse.
   Eyes
If symptoms develop, immediately move individual away from exposure and into fresh air. Flush eyes gently with water for at least 15 minutes while holding eyelids apart; seek immediate medical attention.

Transport.