Agent Name |
EPN |
Alternative Name |
O-Ethyl-O-(4-nitrophenyl)phenylthiophosphonate |
CAS Number |
2104-64-5 |
Formula |
C14-H14-N-O4-P-S |
Major Category |
Pesticides |
Synonyms |
O-Ethyl O-(4-nitrophenyl) benzenephosphonothioate; Ethyl p-nitrophenyl benzenethionophosphonate; O-Ethyl-O-(4-nitrophenyl)phenylthiophosphonate; |
Category |
Organophosphates |
Description |
Yellow solid with an aromatic odor. [pesticide] [Note: A brown liquid above 97 degrees F.] [NIOSH] |
Comments |
A small number of the organophosphates (OPs) can Induce Delayed Neuropathy (OPIDN). OPIDN usually occurs after ingestion and is usually nonoccupational. [Levy, p. 572] |
Restricted |
"No ACTIVE registrants found for selected chemical." [NPIRS] Use as mosquito larvacide cancelled in 1983; All registrations voluntarily cancelled in 1987; [EPA: Status of Chemicals in Special Review] |
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 |
PEL (OSHA) |
0.5 mg/m3 |
MAK |
0.5 mg/m3, inhalable fraction |
IDLH (NIOSH) |
5 mg/m3 |
Vapor Pressure |
9.5 x 10 -07 mm Hg |
Adverse Effects |
Neurotoxin |
Motor Neuropathy |
Other Poison |
Organophosphate |
Links to Other NLM Databases |
Health Studies |
Human Health Effects from Hazardous Substances Data Bank: EPN
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