Phosalone

  • Benzphos
  • S-6-Chloro-2,3-dihydro-2-oxobenzoxazol-3-ylmethyl O,O-diethyl phosphorodithioate
Formula
C12H15ClNO4PS2
Structure
Description
Crystals. Slight garlic.
Uses
Acaricide, insecticide.

Registry Numbers and Inventories.
CAS
2310-17-0
EC (EINECS/ELINCS)
218-996-2
EC Index Number
015-067-00-1
EC Class
Toxic; Harmful; Dangerous for the Environment
RTECS
TD5175000
RTECS class
Agricultural Chemical and Pesticide; Reproductive Effector
UN (DOT)
2783
Merck
12,7489
Beilstein/Gmelin
694650
EPA OPP
294500
Swiss Giftliste 1
G-1733
Austrailia AICS
Listed
Korea ECL
Listed

Properties.
Formula
C12H15ClNO4PS2
Formula mass
367.81
Melting point, °C
48
Boiling point, °C
447
Vapor pressure, mmHg
4E-8 (25 C)
Density
1.39 g/cm3 (20 C)
Solubility in water
Insoluble
Partition coefficient, pKow
4.30
Heat of vaporization
70.5 kJ/mol

Hazards and Protection.
Storage
Do not store below 32F. Do not store with plants, seeds or 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
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.
Stability
Stable under normal laboratory conditions for a period of 2 years.

Fire.
Flash Point,°C
224
Fire fighting
If material on fire or involved in fire: Do not extinguish fire unless flow can be stopped. Solid streams of water may be ineffective. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible.
Fire potential
Non-Combustible
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Poison_Class
3
Exposure effects
Reduced body temperature or elevated body temperature may occur. Low heart rate and abnormally low blood pressure may develop after moderate to severe poisoning. Rapid heart rate, elevated blood pressure, and changes in respiratory rate may also occur. Early giddiness, anxiety headache, and restlessness followed by ataxia, drowsiness, and confusion are common with moderate to severe exposures. Sporadic reports of human birth defects related to organophosphates have not been fully verified.
   Ingestion
Nausea, vomiting, abdominal cramps, and diarrhea are common muscarinic effects. Both painless and frank clinical pancreatitis have been reported.
   Inhalation
Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin. Effects of contact or inhalation may be delayed.
   Skin
Profuse sweating is common. Pallor may be noted. Dermal sensitization has been reported.
   Eyes
Constriction of the pupil, tearing, and blurred vision are common. Prolonged dialation of the pupils may occur. 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. 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.

Transport.
UN number
2783
Response guide
Hazard class
6.1
Packing Group
I; II; III