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| Pentaborane | CAS 19624-22-7 | ||
| B5H9 | RTECS RY8925000 | ||
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Synonyms & Trade Names Pentaboron nonahydride |
DOT ID & Guide 1380 135 |
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Exposure Limits |
NIOSH REL: TWA 0.005 ppm (0.01 mg/m3) ST 0.015 ppm (0.03 mg/m3) | ||
| OSHA PEL�: TWA 0.005 ppm (0.01 mg/m3) | |||
| IDLH 1 ppm | Conversion 1 ppm = 2.58 mg/m3 | ||
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Physical Description Colorless liquid with a pungent odor like sour milk. |
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MW: 63.1 |
BP: 140°F |
FRZ: -52°F |
Sol: Reacts |
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VP: 171 mmHg |
IP: 9.90 eV |
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Sp.Gr: 0.62 |
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Fl.P: 86°F |
UEL: ? |
LEL: 0.42% |
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| Class IC Flammable Liquid: Fl.P. at or above 73�F and below 100�F. | |||
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Incompatibilities & Reactivities Oxidizers, halogens, water, halogenated hydrocarbons [Note: May ignite SPONTANEOUSLY in moist air. Corrosive to natural rubber. Hydrolyzes slowly with heat in water to form boric acid.] |
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Measurement Methods None available |
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Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet (flammable) 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 |
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Respirator Recommendations
NIOSH/OSHA Up to 0.05 ppm: (APF = 10) Any supplied-air respirator Up to 0.125 ppm: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode Up to 0.25 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 1 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 |
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| Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact | |
| Symptoms Irritation eyes, skin; dizziness, headache, drowsiness, incoordination, tremor, convulsions, behavioral changes; tonic spasm face, neck, abdominal, limbs | |
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Target Organs
Eyes, skin, central nervous system |
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| See also: INTRODUCTION |