Fenitrothion

  • O,O-Dimethyl O-(3-methyl-4-nitrophenyl) phosphorothioate
  • O,O-Dimethyl O-4-nitro-m-tolyl thiophosphate
  • O,O-dimethyl o-4-nitro-m-tolyl phosphorothioate
Formula
C9H12NO5PS
Structure
Description
Brownish-yellow oil.
Uses
Insecticide.

Registry Numbers and Inventories.
CAS
122-14-5
EC (EINECS/ELINCS)
204-524-2
EC Index Number
015-054-00-0
EC Class
Harmful; Dangerous for the Environment
RTECS
TG0350000
RTECS class
Agricultural Chemical and Pesticide; Mutagen; Reproductive Effector; Human Data
UN (DOT)
3018
Merck
12,4017
Beilstein/Gmelin
1887367
EPA OPP
373100
Swiss Giftliste 1
G-1623
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C9H12NO5PS
Formula mass
277.24
Melting point, °C
3.4
Boiling point, °C
350
Vapor pressure, mmHg
0.0001 (25 C)
Density
1.32 g/cm3 (20 C)
Solubility in water
Insoluble
Refractive index
1.5528 (20 C)
Partition coefficient, pKow
3.30
Heat of vaporization
57.1 kJ/mol

Hazards and Protection.
Storage
Store at in enameled, aluminum or glass containers and avoid heat and iron which promote decomposition. Store away from foodstuffs.
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 protective gloves, clothing and goggles.
Respirators
Must wear a respirator with an activated-carbon gas filter cartridge affording protection for a determined number of working hours.
Small spills/leaks
(Non-Specific -- Organophosphate Pesticide n.o.s.) Keep unnecessary people away; isolate hazard area and deny entry. Stay upwind; keep out of low areas. Ventilate closed spaces before entering them. Remove and isolate contaminated clothing at the site. Do not touch spilled material; stop leak if you can do so without risk. Use water spray to reduce vapors. Small spills: absorb with sand or other noncombustible absorbent material and place into containers for later disposal. Large spills: dike far ahead of spill for later disposal.
Stability
Above 100 C may decompose explosively.

Fire.
Flash Point,°C
157
Fire fighting
(Non-Specific -- Organophosphate Pesticide n.o.s.) Move containers from fire area if you can do so without risk. Fight fire from maximum distance. Dike fire control water for later disposal; do not scatter the material. Wear positive pressure breathing apparatus and special protective clothing.This compound is an organophosphate insecticide.Small fires: dry chemical, carbon dioxide, water spray, or foam. Large fires: water spray, fog or foam.
Fire potential
Combustible material: may burn but does not ignite readily.
Hazards
When heated to decomposition, it emits very toxic fumes of oxides of nitrogen, phosphorus and sulfur. Decomposition at 212-284F produces a mixture of organophosphorus polymers. Unstable in alkaline media. Stable for 2 years if stored at 68-77F. Do not store above 104F.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Poison_Class
3
Exposure effects
Fever, low heart rate and abnormally low blood pressure, or rapid heart rate and elevated blood pressure may occur. Headache, dizziness, muscle spasms and profound weakness are common. Alterations of level of consciousness, anxiety, paralysis, seizures and coma may occur. Seizures may be more common in children.
   Ingestion
Vomiting, hypersalivation, diarrhea, fecal incontinence and abdominal pain may occur.
   Inhalation
Dyspnea, rales, bronchorrhea, bronchospasm, or tachypnea may be noted. Noncardiogenic pulmonary edema may occur in severe cases. Chemical pneumonitis may be seen.
   Skin
Sweating is a consistent but not universal sign.
   Eyes
Constriction of the pupil, tearing, and blurred vision are common. Prolonged dialation of the pupils may occur in severe poisonings. Opsoclonus has been reported in one case. 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
3018
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
USCG CHRIS Code
FTT