Ethion

Agent Name
Ethion
Alternative Name
Nialate
CAS Number
563-12-2
Formula
C9-H22-O4-P2-S4
Major Category
Pesticides
Ethion formula graphical representation
Synonyms
Nialate; AC 3422; Bis(S-(diethoxyphosphinothioyl)mercapto)methane; Diethion; Embathion; Ethanox; Ethiol 100; Ethodan; Ethopaz; Ethyl methylene phosphorodithioate; FMC-1240; Fosfatox E; Fosfono 50; Hylemox; KWIT; Methyleen-S,S'-bis(O,O-diethyl-dithiofosfaat) [Dutch]; Methylene-S,S'-bis(O,O-diaethyl-dithiophosphat) [German]; Niagara 1240; Nialate; O,O,O',O'-Tetraaethyl-bis(dithiophosphat) [German]; O,O,O',O'-Tetraethyl S,S'-methylene bisphosphorodithioate; O,O,O',O'-Tetraethyl S,S'-methylene di(phosphorodithioate); O,O,O',O'-Tetraethyl S,S'-methylenebis(phosphorodithioate); O,O,O',O'-Tetraethyl S,S'-methylenebisphosphordithioate; O,O,O',O'-Tetraethyl-S,S'-methylenebisphosphorodithioate; O,O,O,O-Tetraethyl S,S'-methylenebis(dithiophosphate); Phosphorodithioic acid, O,O-diethyl ester, S,S-diester with methanedithiol; Phosphotox E; RP 8167; Rhodocide; Rodocid; S,S'-Methylen-bis(O,O-diaethyl-dithiophosphat) [German]; S,S'-Methylene O,O,O',O'-tetraethyl di(phosphorodithioate) (8CI); S,S'-Methylene O,O,O',O'-tetraethyl phosphorodithioate; S,S'-Methylene bis(O,O-diethyl phosphorodithioate); Tetraethyl S,S'-methylene bis(phosphorothiolothionate); Vegfru fosmite; [ChemIDplus]
Category
Organophosphate Insecticides
Description
Colorless to amber-colored, odorless liquid. [insecticide] [Note: A solid below 10 degrees F. The technical product has a very disagreeable odor.]; [NIOSH]
Sources/Uses
Used on greenhouse crops, lawns, turf, and citrus and apple crops; also used on cattle and dormant trees; [EXTOXNET]
Comments
Classified as "moderately toxic"; [EXTOXNET] “The average of two baseline respective cholinesterase activity determinations three days apart, with no exposures to enzyme inhibiting pesticides for at least 30 days, is recommended for each worker prior to exposure to cholinesterase inhibitors because of large inter-individual differences in published baseline values. To be established at least once a year. Removal from workplace exposures is recommended until the cholinesterase activity returns to within 20% of baseline.” [TLVs and BEIs]
Reference Link #1
Biomedical References

Exposure Assessment

BEI
Acetylcholinesterase activity in red blood cells = 70% of individual's baseline; Butylcholinesterase activity in serum or plasma = 60% of individual's baseline; Sample at end of shift; [TLVs and BEIs]
Skin Designation (ACGIH)
Yes
TLV (ACGIH)
0.05 mg/m3, inhalable fraction and vapor
Vapor Pressure
1.5E-06 mm Hg
Reference Link #2

Adverse Effects

ACGIH Carcinogen
Not Classifiable
Other Poison
Organophosphate

Diseases, Processes, and Activities Linked to This Agent

Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: