Diborane
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CAS
19287-45-7
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B2H6
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RTECS
HQ9275000
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Synonyms & Trade Names
Boroethane, Boron hydride, Diboron hexahydride
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DOT ID & Guide
1911 119
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Exposure
Limits
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NIOSH REL: TWA 0.1 ppm (0.1 mg/m3)
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OSHA PEL: TWA 0.1 ppm (0.1 mg/m3)
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IDLH
15 ppm
See: 19287457
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Conversion
1 ppm = 1.13 mg/m3
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Physical Description
Colorless gas with a repulsive, sweet odor. [Note: Usually shipped in pressurized cylinders diluted with hydrogen, argon, nitrogen, or helium.]
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MW: 27.7
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BP: -135°F
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FRZ: -265°F
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Sol: Reacts
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VP(62°F): 39.5 atm
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IP: 11.38 eV
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RGasD: 0.97
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Fl.P: NA (Gas)
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UEL: 88%
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LEL: 0.8%
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Flammable Gas
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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.]
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Measurement Methods
NIOSH 6006
See: NMAM or OSHA Methods
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Personal Protection & Sanitation (See protection codes)
Skin: No recommendation
Eyes: No recommendation
Wash skin: No recommendation
Remove: No recommendation
Change: No recommendation
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First Aid (See procedures)
Breathing: Respiratory support
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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 concern/Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection
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Exposure Routes
inhalation
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Symptoms
Chest tightness, precordial pain, shortness breath, nonproductive cough, nausea; headache, dizziness, chills, fever, lassitude (weakness, exhaustion), tremor, muscle fasciculation; in animals: liver, kidney damage; pulmonary edema; hemorrhage
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Target Organs
respiratory system, central nervous system, liver, kidneys
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See also: INTRODUCTION
See ICSC CARD: 0432 See MEDICAL TESTS: 0069
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