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Synonyms & Trade Names
O-O-Diethyl-O(and S)-2-(ethylthio)ethyl phosphorothioate mixture, Systox®
CAS No.
8065-48-3
RTECS No.
TF3150000
DOT ID & Guide
Formula
(C₂H₅O)₂PSOC₂H₄SC₂H₅
Conversion
IDLH
10 mg/m3
See: 8065483
Exposure Limits
NIOSH REL
TWA 0.1 mg/m3 [skin]
OSHA PEL
TWA 0.1 mg/m3 [skin]
Measurement Methods
NIOSH 5514
See: NMAM or OSHA Methods
Physical Description
Amber, oily liquid with a sulfur-like odor. [insecticide]
Molecular Weight
258.3
Boiling Point
Decomposes
Freezing Point
<-13°F
Solubility
0.01%
Vapor Pressure
0.0003 mmHg
Ionization Potential
?
Specific Gravity
1.12
Flash Point
113°F
Upper Explosive Limit
?
Lower Explosive Limit
?
Class II Combustible Liquid: Fl.P. at or above 100°F and below 140°F.
Incompatibilities & Reactivities
Strong oxidizers, alkalis, water
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin; miosis, ache eyes, rhinorrhea (discharge of thin nasal mucus), headache; chest tightness, wheezing, laryngeal spasm, salivation, cyanosis; anorexia, nausea, vomiting, abdominal cramps, diarrhea; localized sweating; muscle fasciculation, lassitude (weakness, exhaustion), paralysis; dizziness, confusion, ataxia; convulsions, coma; low blood pressure; cardiac irreg
Target Organs
Eyes, skin, respiratory system, cardiovascular system, central nervous system, blood cholinesterase
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
Provide:Eyewash, Quick drench
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Soap wash immediately
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH/OSHA

Up to 1 mg/m3:
(APF = 10) Any supplied-air respirator

Up to 2.5 mg/m3:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode

Up to 5 mg/m3:
(APF = 50) Any supplied-air respirator that has a tight-fitting facepiece and is operated in a continuous-flow mode
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece

Up to 10 mg/m3:
(APF = 1000) Any supplied-air respirator operated in a pressure-demand or other positive-pressure mode

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

See also
INTRODUCTION   ICSC CARD: 0861   MEDICAL TESTS: 0066
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health