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Diborane																				Related Pages
Synonyms & Trade Names
			Boroethane, Boron hydride, Diboron hexahydride
CAS No.
			19287-45-7
	RTECS No.
			HQ9275000
	DOT ID & Guide
			1911 119

FormulaB2H6
	Conversion
			1 ppm = 1.13 mg/m3
	IDLH
			15 ppmSee: 19287457

Exposure Limits
			NIOSH RELTWA 0.1 ppm (0.1 mg/m3)
					OSHA PEL TWA 0.1 ppm (0.1 mg/m3)
	Measurement Methods
			**NIOSH** 6006
					
					See: NMAM or OSHA Methods
										
Physical Description
			Colorless gas with a repulsive, sweet odor.
					[Note: Usually shipped in pressurized cylinders diluted with hydrogen, argon, nitrogen, or helium.]													
										
Molecular Weight27.7	
	Boiling Point-135°F
	Freezing Point-265°F
	SolubilityReacts
	Vapor Pressure(62°F): 39.5 atm
	Ionization Potential11.38 eV											
Flash PointNA (Gas)
	Upper Explosive Limit88%
	Lower Explosive Limit0.8%
	Relative Gas Density0.97
Flammable Gas
Incompatibilities & Reactivities
			Water, halogenated compounds, aluminum, lithium, oxidized surfaces, acids
					[Note: Will ignite spontaneously in moist air at room temperature. Reacts with water to form hydrogen & boric acid.]
Exposure Routes
			inhalation
Symptoms
			Chest tightness, precordial pain, short breath, nonproductive cough, nausea; headache, dizziness, chills, fever, lassitude (weakness, exhaustion), tremor, muscle fasciculation; In Animals: liver, kidney damage; pulmonary edema; hemorrhage
Target Organs
			respiratory system, central nervous system, liver, kidneys
										
Personal Protection/Sanitation
			(See protection codes) **Skin:**No recommendation
							**Eyes:**No recommendation
							**Wash skin:**No recommendation
							**Remove:**No recommendation
							**Change:**No recommendation
	First Aid
			(See procedures)**Breathing:**Respiratory support
Respirator Recommendations
			**NIOSH/OSHA****Up to 1 ppm**: (APF = 10) Any supplied-air respirator**Up to 2.5 ppm**: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode**Up to 5 ppm**: (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 15 ppm**: (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 canister providing protection against the compound of concernAny appropriate escape-type, self-contained breathing apparatus
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 0432
					  MEDICAL TESTS: 0069

			
							

			Page last reviewed:  October 30, 2019						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Pocket Guide to Chemical Hazards
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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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