Isofenphos

  • 1-Methylethyl-2-((ethoxy((1-methylethyl)amino)phosphinothioyl)oxy)benzoate
  • 2-[[Ethoxy[(1-methylethyl)amino]phosphinothioyl]oxy]benzoic acid 1-methylethyl ester
  • Salicylic acid, isopropyl ester, O-ester with O-ethyl isopropylphosphoramidothioate
Formula
C15H24NO4PS
Structure
Description
Colorless oil with a characteristic odor.
Uses
Isofenphos, marketed under the basic producer's trade name Oftanol, is currently used in the United States on turf and ornamental trees and shrubs to control white grubs, mole crickets, and other insects (mostly subterranean species).

Registry Numbers and Inventories.
CAS
25311-71-1
EC (EINECS/ELINCS)
246-814-1
EC Index Number
015-129-00-8
36/37 45
RTECS
VO4395500
RTECS class
Agricultural Chemical and Pesticide; Reproductive Effector
UN (DOT)
2784
Merck
12,5187
Beilstein/Gmelin
2949615
Beilstein Reference
6-10
EPA OPP
512400
Swiss Giftliste 1
G-6259
Austrailia AICS
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C15H24NO4PS
Formula mass
345.4
Boiling point, °C
412
Vapor pressure, mmHg
6E-7 (25 C)
Density
1.131 g/ml (20 C)
Solubility in water
22 mg/L (20 C)
Refractive index
1.5182 (24 C)
Heat of vaporization
66.4 kJ/mol

Hazards and Protection.
Storage
Keep tightly closed. Store at 2-8 C
Protection
Compatible chemical-resistant gloves. Chemical safety goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Make no contact with the spilled material. Fully encapsulating, vapor protective clothing should be worn for spills and leaks with no fire. ELIMINATE all ignition sources and ground all equipment. Stop leak if you can do it without risk. A vapor suppressing foam may be used to reduce vapors. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. Use clean non-sparking tools to collect absorbed material.
Stability
Stable at normal temperatures and pressures.
Incompatibilities
Susceptible to formation of highly toxic and flammable phosphine gas in the presence of strong reducing agents such as hydrides. Partial oxidation by oxidizing agents may result in the release of toxic phosphorus oxides.
Decomposition
Carbon monoxide, Carbon dioxide, Nitrogen oxides, Phosphorous oxides, Sulfur oxides.

Fire.
Flash Point,°C
203
Fire fighting
Extinguish using Water spray. Carbon dioxide, dry chemical powder, or appropriate foam. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
Fire potential
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
Hazards
Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion and poison hazard indoors, outdoors or in sewers.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.
Health
3
 
Flammability
0
 
 
Reactivity
0
 

Health.
Poison_Class
2
Exposure effects
Toxic in contact with skin and if swallowed. Very toxic by inhalation.
   Ingestion
See inhalation.
   Inhalation
May be fatal. May cause irritatior or burns. Vapors may cause dizziness or suffocation.
   Skin
See inhalation.
   Eyes
See inhalation.

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. Remove and isolate contaminated clothing and shoes.
   Skin
Remove and isolate contaminated clothing and shoes. In case of contact with substance, immediately flush with running water for at least 20 minutes. Wash skin with soap and water.
   Eyes
In case of contact with substance, immediately flush with running water for at least 20 minutes.

Transport.
UN number
2784
Response guide
Hazard class
6.1
Packing Group
II