# NIOSH Pocket Guide to Chemical Hazards
Ronnel | CAS 299-84-3
(CH3O)2P(S)OC6H2Cl3 | RTECS TG0525000
Synonyms & Trade Names O,O-Dimethyl O-(2,4,5-trichlorophenyl) phosphorothioate; Fenchlorophos | DOT ID & Guide
Exposure Limits | NIOSH REL: TWA 10 mg/m3
OSHA PEL†: TWA 15 mg/m3
IDLH 300 mg/m3 | Conversion
Physical Description White to light-tan, crystalline solid. [insecticide] [Note: A liquid above 106°F.]
MW: 321.6 | BP: Decomposes | MLT: 106°F | Sol(77°F): 0.004%
VP(77°F): 0.0008 mmHg | IP: ? |  | Sp.Gr(77°F): 1.49
Fl.P: NA | UEL: NA | LEL: NA |
Noncombustible Solid
Incompatibilities & Reactivities Strong oxidizers
Measurement Methods NIOSH 5600; OSHA PV2054
Personal Protection & Sanitation 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 chemical cartridge respirator with organic vapor cartridge(s) in combination with a dust, mist, and fume filter/(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 organic vapor cartridge(s) in combination with a dust, mist, and fume filter Up to 300 mg/m3: (APF = 50) Any chemical cartridge respirator with a full facepiece and organic vapor cartridge(s) in combination with a high-efficiency particulate filter/(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister having a high-efficiency particulate filter/(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 a high-efficiency particulate filter/Any appropriate escape-type, self-contained breathing apparatus
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
See also: INTRODUCTION