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TEPP																				Related Pages
Synonyms & Trade Names
			Ethyl pyrophosphate, Tetraethyl pyrophosphate, Tetron®
CAS No.
			107-49-3
	RTECS No.
			UX6825000
	DOT ID & Guide
			2783 152(solid)3018 152(liquid)

Formula[(CH3CH2O)2PO]2O
	Conversion
			1 ppm = 11.87 mg/m3
	IDLH
			5 mg/m3See: 107493

Exposure Limits
			NIOSH RELTWA 0.05 mg/m3 [skin]
					OSHA PEL TWA 0.05 mg/m3 [skin]
	Measurement Methods
			**NIOSH** 2504
					
					See: NMAM or OSHA Methods
										
Physical Description
			Colorless to amber liquid with a faint, fruity odor.
					[insecticide] [Note: A solid below 32°F.]													
										
Molecular Weight290.2	
	Boiling PointDecomposes
	Freezing Point32°F
	SolubilityMiscible
	Vapor Pressure0.0002 mmHg
	Ionization Potential?											
Specific Gravity1.19	
	Flash PointNA
	Upper Explosive LimitNA
	Lower Explosive LimitNA
Noncombustible Liquid
Incompatibilities & Reactivities
			Strong oxidizers, alkalis, water
					[Note: Hydrolyzes quickly in water to form pyrophosphoric acid.]
Exposure Routes
			inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
			Eye pain, blurred vision, lacrimation (discharge of tears); rhinorrhea (discharge of thin nasal mucus); headache, chest tightness, cyanosis; anorexia, nausea, vomiting, diarrhea; lassitude (weakness, exhaustion), twitching, paralysis, Cheyne-Stokes respiration, convulsions; low blood pressure, cardiac irreg; sweating
Target Organs
			Eyes, respiratory system, central nervous system, cardiovascular system, gastrointestinal tract, 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:**No recommendation
							**Provide:**Eyewash, Quick drench
	First Aid
			(See procedures)**Eye:**Irrigate immediately
							**Skin:**Water flush immediately
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately
Respirator Recommendations
			**NIOSH/OSHA****Up to 0.5 mg/m3**: (APF = 10) Any supplied-air respirator**Up to 1.25 mg/m3**: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode**Up to 2.5 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 5 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: 1158
					  MEDICAL TESTS: 0221

			
							

			Page last reviewed:  October 30, 2019						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Pocket Guide to Chemical Hazards
Introduction
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Appendices
A – NIOSH Potential Occupational Carcinogens
B – Thirteen OSHA-Regulated Carcinogens
C – Supplementary Exposure Limits
D – Substances with No Established RELs
E – OSHA Respirator Requirements for Selected Chemicals
F – Miscellaneous Notes
G – 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect
Type C & CE – Definitions for Type C and Type CE Respirators
Personal Protection and Sanitation Codes
First Aid Procedures Follow NIOSH Facebook
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