Phenthoate

  • Acetic acid, (O,O-dimethyldithiophoshorylphenyl)-ethyl ester
  • Acetic acid, mercaptophenyl-ethyl ester, S ester with O,O-dimethyl phosphorodithioate
  • O,O-Dimethyl s-(alpha-ethoxycarbonylbenzyl) thiophosphate
  • O,O-Dimethyl-S-(phenylacetic acid ethyl ester) phosphorodithioate
  • O,O-Dimethyl s-(phenyl)(carboethoxy)methyl phosphorodithioate
  • Ethyl mercaptophenylacetate O,O-dimethyl phosphorodithioate
Formula
C12H17O4PS2
Structure
Description
Colorless, crystalline solid. Aromatic.
Uses
Organothiophosphate insecticide.

Registry Numbers and Inventories.
CAS
2597-03-7
EC (EINECS/ELINCS)
219-997-0
EC Index Number
015-097-00-5
EC Class
Harmful
RTECS
AI7875000
RTECS class
Agricultural Chemical and Pesticide
UN (DOT)
3018
Beilstein/Gmelin
2474108
Beilstein Reference
5-10
EPA OPP
104901
Swiss Giftliste 1
G-6475
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C12H17O4PS2
Formula mass
320.38
Melting point, °C
156
Boiling point, °C
380
Vapor pressure, mmHg
6E-6 (25 C)
Density
1.226 g/cm3 (20 C)
Solubility in water
11 mg/L (24 C)
Refractive index
1.5538 (20 C)
Partition coefficient, pKow
3.90
Heat of vaporization
62.8 kJ/mol

Hazards and Protection.
Storage
Must be stored in its sealed original containers, in well-aired, fresh and dry storehouses or in shaded and possibly well-aired places. It is recommended that the product's temperature. Not exceed 25-30C, and keep away from sources of heat free flames or spark-generating equipment. Containers must be stacked in such a way as to permit free circulation of air at bottom and inside of piles storage areas must be located at a suitable distance from inhabited buildings, animal shelters, and food stores; moreover, they must be inaccessible to unauthorized persons, children, and domestic animals. Rooms used for storage only should be soundly constructed and fitted with secure locks.
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
Workers handling and applying organophosphate pesticides must be given personal protective equipment comprising overalls made of a tight fabric or polyvinyl chloride, gloves, and rubber boots. The eyes should be protected by goggles.
Respirators
Respiratory protection (supplied-air respirator with full facepiece or self-contained breathing apparatus) should be available where these compounds are manufactured or used and should be worn in case of emergency and overexposure.<BR>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
It is stable in buffer solutions pH 3.9-7.8 But approx 25% is hydrolyzed in 20 days in buffer solutions at pH 9. 7. Stable to 60 C for extended exposures technical product biological activity of the product remains practically unvaried for 2 years under environmental conditions, provided the product is stored in its unopened and undamaged original containers, in shaded and possibly well-aired places.

Fire.
Flash Point,°C
183
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. Use alcohol foam, carbon dioxide or dry chemical.
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.
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
Increased bronchial secretions, bronchospasm and dyspnea occur in moderate to severe exposures. Respiratory failure and non-cardiogenic pulmonary edema may occur with severe poisonings. Acute respiratory insufficiency is the main cause of death in acute poisonings. The hydrocarbon vehicle may cause chemical pneumonitis.
   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 patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   Skin
Systemic effects can occur from dermal exposure to organophosphates. Remove contaminated clothing, wash skin, hair and nails vigorously with repeated soap washings. Leather absorbs pesticides; all contaminated leather should be discarded. Rescue personnel and bystanders should avoid direct contact with contaminated skin, clothing, or other objects. Treatment should include recommendations listed in the oral exposure section when appropriate.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility. Patients symptomatic following exposure should be observed in a controlled setting until all signs and symptoms have fully resolved. Treatment should include recommendations listed in the oral exposure section when appropriate.

Transport.
UN number
3018
Response guide
Hazard class
6.1
Packing Group
I; II; III