# NIOSH Pocket Guide to Chemical Hazards
Silicon tetrahydride | CAS 7803-62-5
SiH4 | RTECS VV1400000
Synonyms & Trade Names Monosilane, Silane, Silicane | DOT ID & Guide 2203 116
Exposure Limits | NIOSH REL: TWA 5 ppm (7 mg/m3)
OSHA PEL†: none
IDLH N.D. | Conversion 1 ppm = 1.31 mg/m3
Physical Description Colorless gas with a repulsive odor.
MW: 32.1 | BP: -169°F | FRZ: -301°F | Sol: Decomposes
VP: >1 atm | IP: ? | RGasD: 1.11 |
Fl.P: NA (Gas) | UEL: ? | LEL: ? |
Flammable Gas (may ignite SPONTANEOUSLY in air).
Incompatibilities & Reactivities Halogens (bromine, chlorine, carbonyl chloride, antimony pentachloride, tin(IV) chloride), water
Measurement Methods None available
Personal Protection & Sanitation 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 To be added later
Exposure Routes inhalation
Symptoms Irritation eyes, skin, mucous membrane; nausea, headache
Target Organs Eyes, skin, respiratory system, central nervous system
See also: INTRODUCTION