Acephate

  • Chevron orthene
  • O,S-dimethyl acetyl phosphoramidothioate
  • Orthene
  • Ortran
Formula
C4H10NO3PS
Structure
Description
A white solid.
Uses
Contact and systemic insecticide.

Registry Numbers and Inventories.
CAS
30560-19-1
EC (EINECS/ELINCS)
250-241-2
EC Index Number
015-079-00-7
EC Class
Harmful
RTECS
TB4760000
RTECS class
Agricultural Chemical and Pesticide; Mutagen; Reproductive Effector
UN (DOT)
3018
Merck
12,31
Beilstein/Gmelin
1936365
EPA OPP
103301
Swiss Giftliste 1
G-9081
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
C4H10NO3PS
Formula mass
183.17
Melting point, °C
64-68
Vapor pressure, mmHg
2E-6
Density
1.35 g/cm3 (20 C)
Solubility in water
about 650 g/L at 20 C
Partition coefficient, pKow
-0.85

Hazards and Protection.
Storage
Store at in a cool dry place.
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
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
Relatively

Fire.
Fire fighting
Small Fires: Dry chemical, carbon dioxide 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
When heated to decomp, can emit highly toxic fumes of oxides of phosphorous.

Health.
Poison_Class
4
Exposure effects
Headache, dizziness, muscle spasms and profound weakness are common. Alterations of level of consciousness, seizures and coma may occur. Seizures may be more common in children. Peripheral neuropathy of the mixed sensory-motor type may be delayed in onset by 6 to 21 days. Recovery may be slow or incomplete. Acephate was not teratogenic in rats and mice. <br>No data were available to assess the potential effects of exposure to this agent during pregnancy or lactation. <br>Sporadic reports of human birth defects related to organophosphates have not been fully verified.
   Ingestion
Vomiting, diarrhea, fecal incontinence and abdominal pain may occur.
   Inhalation
Acute respiratory insufficiency is the main cause of death in acute poisonings.
   Skin
Sweating is a consistent but not universal sign.
   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
Packing Group
I; II; III