# NIOSH Pocket Guide to Chemical Hazards
TEDP | CAS 3689-24-5
[(CH3CH2O)2PS]2O | RTECS XN4375000
Synonyms & Trade Names Bladafum®, Dithion®, Sulfotep, Tetraethyl dithionopyrophosphate, Tetraethyl dithiopyrophosphate, Thiotepp® | DOT ID & Guide 1704 153
Exposure Limits | NIOSH REL: TWA 0.2 mg/m3 [skin]
OSHA PEL: TWA 0.2 mg/m3 [skin]
IDLH 10 mg/m3 | Conversion 1 ppm = 13.18 mg/m3
Physical Description Pale-yellow liquid with a garlic-like odor. [Note: A pesticide that may be absorbed on a solid carrier or mixed in a more flammable liquid.]
MW: 322.3 | BP: Decomposes | FRZ: ? | Sol: 0.0007%
VP: 0.0002 mmHg | IP: ? |  | Sp.Gr(77°F): 1.20
Fl.P: ? | UEL: ? | LEL: ? |
Combustible Liquid
Incompatibilities & Reactivities Strong oxidizers, iron [Note: Corrosive to iron.]
Measurement Methods None available
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: No recommendation 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 2 mg/m3: (APF = 10) Any supplied-air respirator Up to 5 mg/m3: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode Up to 10 mg/m3: (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, skin absorption, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin; eye pain, blurred vision, lacrimation (discharge of tears); rhinorrhea (discharge of thin mucus); headache; cyanosis; anorexia, nausea, vomiting, diarrhea; localized sweating, lassitude (weakness, exhaustion), twitching, paralysis, Cheyne-Stokes respiration, convulsions, low blood pressure, cardiac irregularities
Target Organs Eyes, skin, respiratory system, central nervous system, cardiovascular system, blood cholinesterase
See also: INTRODUCTION