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)phenylthiophosphonate; O-Ethyl O-(4-nitrophenyl) benzenephosphonothioate; Ethyl p-nitrophenyl benzenethionophosphonate; O-Ethyl-O-(4-nitrophenyl)phenylthiophosphonate;

Category

Organophosphate Insecticides

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. 431]

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

9.5E-7 mm Hg

Adverse Effects
Neurotoxin

Motor Neuropathy

Other Poison

Organophosphate

ACGIH Carcinogen

Not Classifiable

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Chemical Information

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Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent: