- Silicon hydride
- Silicon tetrahydride
Gas. Repulsive odor.
Source of hyperpure silicon for semiconductors.
Registry Numbers and Inventories.
Japan ENCS (MITI)
Melting point, °C
Boiling point, °C
Vapor pressure, mmHg
530 (-118 C)
Vapor density (air=1)
Solubility in water
Heat of fusion
Hazards and Protection.
Store in a cool, dry, well ventilated location. Separate from alkalies, oxidizing materials, halogens, and air. Outside or detached storage is preferred.
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Wear appropriate protective gloves, clothing and goggles. Always wear thermal protective clothing when handling refrigerated/cryogenic liquids.
Wear positive pressure self-contained breathing apparatus (SCBA).
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors.
Stable at ordinary temperature; completely decomp at approx 400 C into silicon and hydrogen; decomp by an electric dischage. he substance may spontaneously ignite on contact with air.
Reacts with water to form silicon hydroxides and hydrogen gas.
The silanes decomposition at elevated temp to liberate hydrogen and deposit a high purity silicon, which leads to some of the principal uses of silanes.
Upper exp. limit, %
Lower exp. limit, %
Do not extinguish fire unless flow can be stopped. Do not apply water to point of leak in tank car or container. Use water in flooding quantities as fog. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Use alcohol foam, dry chemical or carbon dioxide.
Silane will ignite spontaneously in air. May polymerize explosively when heated or involved in a fire. Vapors from liquefied gas are initially heavier than air and spread along ground. Vapors may travel to source of ignition and flash back. Containers may explode when heated. Ruptured cylinders may rocket.
Fire may produce irritating and/or toxic gases.
TLV (as TWA): 5 ppm; 6.6 mg/m3 (ACGIH 1996). NIOSH REL: TWA 5 ppm (7 mg/m3)
Nausea, vomiting and diarrhea are possible if ingested.
Cough, tachypnea, and wheezing are common after inhalation.
Redness, swelling and pain may occur.
Irritants may cause swelling, redness and pain at any site, especially at mucous membranes. The mouth, nose, and eyes are susceptible to these effects.
Seek medical assistance.
Vapors may cause dizziness or asphyxiation without warning. May be toxic if inhaled at high concentrations.
Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.
Flush with running water for at least 20 minutes.
Std. Transport #