Ronnel

  • Phosphorothioic acid, O,O-dimethyl O-(2,4,5-trichlorophenyl)ester
  • Fenchlorophos
  • Dimethyl trichlorophenyl thiophosphate
Formula
C8H8Cl3O3PS
Structure
Description
Colorless crystals. Mercaptan odor.
Uses
Insecticide.

Registry Numbers and Inventories.
CAS
299-84-3
EC (EINECS/ELINCS)
206-082-6
EC Index Number
015-052-00-X
EC Class
Harmful
RTECS
TG0525000
RTECS class
Agricultural Chemical and Pesticide; Mutagen; Reproductive Effector
UN (DOT)
2922
Merck
12,8415
Beilstein/Gmelin
1885571
Beilstein Reference
4-06-00-00994
EPA OPP
58301
Swiss Giftliste 1
G-2070
Austrailia AICS
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C8H8Cl3O3PS
Formula mass
321.55
Melting point, °C
42
Boiling point, °C
345
Vapor pressure, mmHg
0.0008 (25 C)
Density
1.485 g/cm3 (25 C)
Solubility in water
0.04 g/L
Refractive index
1.5597
Partition coefficient, pKow
5.07
Heat of fusion
23.4 kJ/mol
Heat of vaporization
48.8 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
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
Wear appropriate eye protection and protective clothing to prevent skin and eye contact.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
ELIMINATE all ignition sources. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.
Stability
Stable at temperature up to 60 C, in neutral and acidic media. Hydrolyzed by dilute alkali to the dimethyl compound. It is incompatible with alkaline pesticides.
Incompatibilities
Avoid contact with strong oxidizers. Hydrolyzed by dilute alkali to the dimethyl cmpd. It is incompatible with alkaline pesticides.
Decomposition
When heated to decomposition it emits very toxic fumes of hydrogen chloride, oxides of phosphorus and oxides of sulfur.

Fire.
Fire fighting
Extinguish using agent most appropriate for surrounding fire.
Fire potential
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Hazards
Contact with metals may evolve flammable hydrogen gas.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure limit(s)
TLV: ppm; 10 mg/m3 (as TWA) (ACGIH 1995-1996). OSHA PEL: TWA 15 mg/m3 NIOSH REL: TWA 10 mg/m3 NIOSH IDLH: 300 mg/m3
Poison_Class
4
Exposure effects
Reduced body temperature or elevated body temperature may occur. Low heart rate and abnormally low blood pressure may develop after moderate to severe poisoning. Rapid heart rate, elevated blood pressure, and changes in respiratory rate may also occur. Early giddiness, anxiety headache, and restlessness followed by ataxia, drowsiness, and confusion are common with moderate to severe exposures. Sporadic reports of human birth defects related to organophosphates have not been fully verified.
   Ingestion
Nausea, vomiting, abdominal cramps, and diarrhea are common muscarinic effects. Both painless and frank clinical pancreatitis have been reported.
   Inhalation
TOXIC; inhalation, ingestion, or skin contact with material may cause severe injury or death. Effects of contact or inhalation may be delayed.
   Skin
Profuse sweating is common. Pallor may be noted. Dermal sensitization has been reported.
   Eyes
Constriction of the pupil, tearing, and blurred vision are common. Prolonged dialation of the pupils may occur. Salivation commonly occurs.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.
   Skin
Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin.
   Eyes
Immediately flush with running water for at least 20 minutes.

Transport.
UN number
2922
Response guide
Hazard class
8
Packing Group
I; II; III