Agent Name

Fonofos

CAS Number

944-22-9

Formula

C10-H15-O-P-S2

Major Category

Pesticides

Synonyms

(+-)-O-Ethyl S-phenyl ethylphosphonodithioate (8CI)(9CI); Difonate; Difonatul; Doubledown; Dyfonate; Dyfonate Tillam 1-4E; Dyphonate; Ethylphosphonodithioic acid O-ethyl S-phenyl ester; Fonophos; N-2788; N-2790; O-Aethyl-S-phenyl-aethyl-dithiophosphonat [German]; O-Ethyl S-phenyl ethyldithiophosphonate; O-Ethyl S-phenyl ethylphosphonothiolothionate; O-Ethyl-S-phenyl ethylphosphonodithioate; OMS 410; Phosphonodithioic acid, ethyl-, O-ethyl S-phenyl ester; Stauffer N 2790; [ChemIDplus]

Category

Organophosphate Insecticides

Description

Light-yellow liquid with an aromatic odor. [insecticide]; [NIOSH]

Sources/Uses

Used primarily on corn, and also on sugar cane, peanuts, tobacco, turf, and vegetables; [EXTOXNET]

Comments

Classified as "highly toxic," the more concentrated formulations of fonofos may be used only by certified applicators. It persists in soil with a half-life of about 40 days. [EXTOXNET]

Reference Link

EXTOXNET PIP - FONOFOS

Exposure Assessment
BEI

Cholinesterase activity in red cells = 70% of individual's baseline, sample time discretionary; [ACGIH]

Skin Designation (ACGIH)

Yes

TLV (ACGIH)

0.1 mg/m3, inhalable fraction and vapor

Vapor Pressure

0.0002 mm Hg

Lethal Concentration

LC50 (rat) = 1,900 mg/m31h

Reference Link

EPA Pesticide Chemical Search

Adverse Effects
Other Poison

Organophosphate

ACGIH Carcinogen

Not Classifiable

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

Search TOXNET

Chemical Information

Search ChemIDplus

Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: