Terbufos(13071-79-9)
Product Identification
Product Name
Terbufos
Synonyms
Contraven
Counter
S-(((1,1-Dimethylethyl)thio)methyl) O,O-diethyl phosphorodithioate
S-((1,1-Dimethylethyl)thio)methyl) O,O-diethyl phosporodithioate
S-tert-Butylthiomethyl O,O-diethyl phosphorodithioate
tert-Butylsulfanylmethylsulfanyl-diethoxy-sulfanylidenephosphorane
CAS
13071-79-9
Formula
C9H21O2PS3
Molecular Weight
288.44
EINECS
235-963-8
RTECS
TD7200000
RTECS Class
Agricultural Chemical and Pesticide
Merck
12,9301
Beilstein/Gmelin
1710115
Beilstein Reference
4-01-00-03092
EC Index Number
015-139-00-2
EC Class
Very toxic
Physical and Chemical Properties
Appearance
Technical product is a clear, colorless to pale yellow liquid.
Solubility in water
15 mg/L
Melting Point
-29
Boiling Point
320
Vapor Pressure
0.0006 (25 C)
Density
1.1125 g/cm3 (20 C)
Partition Coefficient
3.68
Heat Of Vaporization
53.9 kJ/mol
Usage
Soil insecticide, nematicide.
Refractive Index
1.5255 (20 C)
First Aid Measures
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. Remove material from skin immediately. 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.
Handling and Storage
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.
Hazards Identification
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.
Ingestion
Vomiting, hypersalivation, diarrhea, fecal incontinence and abdominal pain may occur.
Hazards
This is a liquid organophosphorus pesticide. Hydrolyzes under alkaline conditions.
UN (DOT)
2783
Exposure Controls/Personal Protection
Personal Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
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.
Fire Fighting Measures
Flash Point
88
Fire Fighting
This is a liquid organophosphorus pesticide. Wear positive pressure breathing apparatus and special protective clothing. Move container 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.For small fires, use dry chemical, carbon dioxide, water spray, or foam. For large fires, use water spray, fog, or foam.
Fire Potential
Moderate fire risk.
Accidental Release Measures
Small spills/leaks
This is a liquid organophosphorus pesticide. 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.