Ronnel

Synonyms & Trade Names

O,O-Dimethyl O-(2,4,5-trichlorophenyl) phosphorothioate, Fenchlorophos

CAS No.

299-84-3

RTECS No.

TG0525000

DOT ID & Guide

Formula

(CH₃O)₂P(S)OC₆H₂Cl₃

Conversion

IDLH

300 mg/m³
See: 299843

Exposure Limits

NIOSH REL

TWA 10 mg/m³

OSHA PEL

TWA 15 mg/m³ See Appendix G

Measurement Methods

NIOSH 5600;
OSHA PV2054
See: NMAM or OSHA Methods

Physical Description

White to light-tan, crystalline solid. [insecticide] [Note: A liquid above 106°F.]

Molecular Weight

321.6

Boiling Point

Decomposes

Melting Point

106°F

Solubility

(77°F): 0.004%

Vapor Pressure

(77°F): 0.0008 mmHg

Ionization Potential

Specific Gravity

(77°F): 1.49

Flash Point

Upper Explosive Limit

Lower Explosive Limit

Noncombustible Solid

Incompatibilities & Reactivities

Strong oxidizers

Exposure Routes

inhalation, ingestion, skin and/or eye contact

Symptoms

In Animals: irritation eyes; cholinesterase inhibition; liver, kidney damage

Target Organs

Eyes, liver, kidneys, blood plasma

Personal Protection/Sanitation

(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated
Remove:When wet or contaminated
Change:Daily

First Aid

(See procedures)
Eye:Irrigate immediately
Skin:Soap wash promptly
Breathing:Respiratory support
Swallow:Medical attention immediately

Respirator Recommendations

NIOSH

Up to 100 mg/m³:
(APF = 10) Any air-purifying half-mask respirator with organic vapor cartridge(s) in combination with an N95, R95, or P95 filter. The following filters may also be used: N99, R99, P99, N100, R100, P100.
Click here for information on selection of N, R, or P filters.
(APF = 10) Any supplied-air respirator

Up to 250 mg/m³:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode
(APF = 25) Any powered, air-purifying respirator with an organic vapor cartridge in combination with a high-efficiency particulate filter.

Up to 300 mg/m³:
(APF = 50) Any air-purifying full-facepiece respirator equipped with organic vapor cartridge(s) in combination with an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister having an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
(APF = 50) Any powered, air-purifying respirator with a tight-fitting facepiece and organic vapor cartridge(s) in combination with a high-efficiency particulate filter*
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece

Emergency or planned entry into unknown concentrations or IDLH conditions:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus

Escape:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister having an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

Ronnel

NIOSH REL

OSHA PEL

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