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Tributyl phosphate																				Related Pages
Synonyms & Trade Names
			Butyl phosphate, TBP, Tributyl ester of phosphoric acid, Tri-n-butyl phosphate
CAS No.
			126-73-8
	RTECS No.
			TC7700000
	DOT ID & Guide

Formula(CH3[CH2]3O)3PO
	Conversion
			1 ppm = 10.89 mg/m3
	IDLH
			30 ppmSee: 126738

Exposure Limits
			NIOSH RELTWA 0.2 ppm (2.5 mg/m3)
					OSHA PEL TWA 5 mg/m3See Appendix G
	Measurement Methods
			**NIOSH** 5034
					
					See: NMAM or OSHA Methods
										
Physical Description
			Colorless to pale-yellow, odorless liquid.													
										
Molecular Weight266.3	
	Boiling Point552°F (Decomposes)
	Freezing Point-112°F
	Solubility0.6%
	Vapor Pressure(77°F): 0.004 mmHg
	Ionization Potential?											
Specific Gravity0.98	
	Flash Point(oc) 295°F
	Upper Explosive Limit?
	Lower Explosive Limit?
Class IIIB Combustible Liquid: Fl.P. at or above 200°F.
Incompatibilities & Reactivities
			Alkalis, oxidizers, water, moist air
Exposure Routes
			inhalation, ingestion, skin and/or eye contact
Symptoms
			irritation eyes, skin, respiratory system, headache; nausea
Target Organs
			Eyes, skin, respiratory system
										
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
	First Aid
			(See procedures)**Eye:**Irrigate immediately
							**Skin:**Soap wash promptly
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately
Respirator Recommendations
			**NIOSH****Up to 2 ppm**: (APF = 10) Any supplied-air respirator**Up to 5 ppm**: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode**Up to 10 ppm**: (APF = 50) Any self-contained breathing apparatus with a full facepiece(APF = 50) Any supplied-air respirator with a full facepiece**Up to 30 ppm**: (APF = 2000) Any supplied-air respirator that has a full facepiece and is 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: 0584

			
							

			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
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