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NIOSH

SILANE

ICSC: 0564

Monosilane
Silicon tetrahydride
Silicane
SiH4
Molecular mass: 32.1
(cylinder)
ICSC # 0564 		CAS # 7803-62-5
RTECS # VV1400000
UN # 2203
July 04, 1997 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Extremely flammable.
NO open flames, NO sparks, and NO smoking.
Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out; in other cases extinguish with powder, carbon dioxide.
EXPLOSION Gas/air mixtures are explosive.
Closed system, ventilation, explosion-proof electrical equipment and lighting.
Combat fire from a sheltered position.
EXPOSURE
STRICT HYGIENE!

•INHALATION Cough. Headache. Nausea. Sore throat.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Refer for medical attention.
•SKIN Redness. ON CONTACT WITH LIQUID: FROSTBITE.
Cold-insulating gloves.
ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Rinse skin with plenty of water or shower.
•EYES Redness. Pain.
Safety goggles, or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
•INGESTION


SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Evacuate danger area! Consult an expert! Ventilation. Remove gas with fine water spray. (Extra personal protection: self-contained breathing apparatus).
Fireproof.

UN Hazard Class: 2.1
ICSC: 0564 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

SILANE

ICSC: 0564

I

M

P

O

R

T

A

N

T


D

A

T

A

PHYSICAL STATE; APPEARANCE:
COLOURLESS GAS , WITH CHARACTERISTIC ODOUR.

PHYSICAL DANGERS:
The gas is heavier than air.

CHEMICAL DANGERS:
The substance may spontaneously ignite on contact with air. The substance decomposes on heating or on burning producing silicon and hydrogen , causing fire and explosion hazard. The substance is a strong reducing agent and reacts with oxidants. Reacts slowly with water. Reacts with potassium hydroxide solution and halogens.

OCCUPATIONAL EXPOSURE LIMITS:
TLV (as TWA): 5 ppm; 6.6 mg/m3 (ACGIH 1996).
MAK not established.
OSHA PEL†: none
NIOSH REL: TWA 5 ppm (7 mg/m3)
NIOSH IDLH: N.D. See: IDLH INDEX


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation.

INHALATION RISK:
A harmful concentration of this gas in the air will be reached very quickly on loss of containment.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance irritates the eyes, the skin and the respiratory tract. Rapid evaporation of the liquid may cause frostbite.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:

PHYSICAL
PROPERTIES

Boiling point: -112°C
Melting point: -185°C
Solubility in water: slow reaction
Relative vapour density (air = 1): 1.3
Explosive limits, vol% in air: 1.37-100

ENVIRONMENTAL
DATA


N O T E S

NFPA Code: H2; F4; R3;

ADDITIONAL INFORMATION



ICSC: 0564 SILANE
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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