Phorate

  • O,O-Diethyl ethylthiomethyl phosphorodithioate
  • O,O-Diethyl-S-(Ethylthio)methyl phosphorodithioate
Formula
C7H17O2PS3
Structure
Description
Clear liquid with an objectionable odor.
Uses
Application sites: non-domestic terrestrial and aquatic foodfeed crops, and greenhouse commercial nursery stock (both outdoor and greenhouse).

Registry Numbers and Inventories.
CAS
298-02-2
EC (EINECS/ELINCS)
206-052-2
EC Index Number
015-033-00-6
EC Class
Very toxic
RTECS
TD9450000
RTECS class
Agricultural Chemical and Pesticide; Mutagen; Reproductive Effector
UN (DOT)
3018
Merck
12,7486
Beilstein/Gmelin
1708517
Beilstein Reference
4-01-00-03090
RCRA
P094
EPA OPP
57201
Swiss Giftliste 1
G-1003
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
C7H17O2PS3
Formula mass
260.38
Melting point, °C
-42.8
Boiling point, °C
296
Vapor pressure, mmHg
0.0026 (25 C)
Density
1.1615 g/cm3 (20 C)
Solubility in water
50 mg/L
Refractive index
1.5349 (20 C)
Partition coefficient, pKow
3.92
Heat of vaporization
51.4 kJ/mol

Hazards and Protection.
Storage
Stable when stored at room temperature for at least 2 years. Store at out of reach of animals and away from feed and 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
Caution : Phorate will form toxic mixtures of sulfur oxides, phosphorus oxides, and nitrogen oxides when heated to decomposition. Avoid sources of extreme heat. (Non-Specific -- 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 it without risk. Use water spray to reduce vapors. Small spills: take up 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
No data.
Incompatibilities
Incompatible with alkaline compounds and with water-containing preparations. Avoid contact with water, alkalis.

Fire.
Flash Point,°C
132
Fire fighting
(Non-Specific -- Organophosphorous Pesticide) Wear positive pressure self-contained breathing apparatus. Move container from fire area if you can do it without risk. Fight fire from maximum distance. Dike fire control water for later disposal; do not scatter the material.(Non-Specific -- Organophosphorous Pesticide) Extinguish with dry chemical, carbon dioxide, water spray, fog, or foam.
Fire potential
Combustible material: may burn but does not ignite readily.
Hazards
Shock can shatter containers, releasing the contents. When heated to decomposition, toxic fumes of sulfur oxides, phosphorus oxides, and nitrogen oxides are emitted. Hydrolyzed in water and alkalies.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure limit(s)
TLV: 0.05 mg/m3 (as TWA); 0.2 mg/m3 (as STEL) (skin) (ACGIH 1992-1993) NIOSH REL: TWA 0.05 mg/m3 ST 0.2 mg/m3 skin
Poison_Class
1
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
PHR