Edifenphos

  • O-Ethyl S,S-diphenyl phosphorodithioate
  • O-Ethyl S,S-diphenyl dithiophosphate
  • S,S-Diphenyl O-ethyl phosphorodithioate
Formula
C14H15O2PS2
Structure
Description
Yellow to brown liquid with a characteristic odor.
Uses
Fungicide for blast disease, ear blight, and stemrot in rice. Not approved for use in the US.

Registry Numbers and Inventories.
CAS
17109-49-8
EC (EINECS/ELINCS)
241-178-1
EC Index Number
015-121-00-4
21 23/25 43 50/53
21 23/25 43 50/53
RTECS
TE3850000
RTECS class
Agricultural Chemical and Pesticide; Mutagen
UN (DOT)
3018
Merck
12,3560
Beilstein/Gmelin
1988797
Beilstein Reference
6-06
EPA OPP
434300
Korea ECL
Listed

Properties.
Formula
C14H15O2PS2
Formula mass
310.38
Boiling point, °C
430
Vapor pressure, mmHg
3E-7 (25 C)
Density
1.231 g/cm3 (20 C)
Solubility in water
50 mg/L (20 C)
Partition coefficient, pKow
2.66
Heat of vaporization
65.9 kJ/mol

Hazards and Protection.
Storage
Store at 2-8 C.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Cover with plastic sheet to prevent spreading. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.

Fire.
Flash Point,°C
214
Fire fighting
Small Fires: Dry chemical, CO2 or water spray. Large Fires: Water spray, fog or regular foam.
Fire potential
Combustible material: may burn but does not ignite readily.
Hazards
Containers may explode when heated.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure effects
   Inhalation
Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin. Effects of contact or inhalation may be delayed.
   Skin
Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact.
   Eyes
See Skin.

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
Std. Transport #
4921674