HELIUM
SYNONYMS:
EINECS
No. 231-168-5; HELIO (Spanish); HELIUM, COMPRESSED; HELIUM GAS; HELIUM,
REFRIGERATED LIQUID; HELIUMCRYOGENIC LIQUID
IDENTIFICATION:
CAS:
7440-59-7
DOT ID:
UN1046
(compressed); UN1963 (liquid, refrigerated)
ERG Guide:
121
(UN1046); 120 (UN1963)
Formula:
He
RTECS No:
MH6520000
Properties:
Colorless,
odorless, inert, nonflammable gas.
Uses:
Welding.
HEALTH & SAFETY INFORMATION
•
A simple asphyxiant. Gas is lighter than air, but cold vapor is heavier than
air and can accumulate at ground level, causing oxygen deficiency. Rapid
evaporation of the liquid may cause frostbite.
Respirator:
At
any concentrations above the NIOSH REL, or where there is no REL, at any
detectable concentration:
SCBAF:PD,PP
(any self-contained breathing apparatus that has a full facepiece and is
operated in a pressure-demand or other positivepressure mode) SAF:PD,PP:ASCBA
(any suppliedair 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 breathing apparatus operated in a pressure-demand or
other positive-pressure mode).
Escape:
GMFOV [any airpurifying,
full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted
organic vapor canister] SCBAE (any appropriate escape-type, selfcontained
breathing apparatus).
FIRST AID:
Move
victim to fresh air. Call emergency medical care. Apply artificial respiration
if victim is not breathing. Administer oxygen if breathing is difficult. Clothing
frozen to the skin should be thawed before being removed. In case of contact
with liquefied gas, thaw frosted parts with lukewarm water. Keep victim warm
and quiet. Ensure that medical personnel are aware of the material(s) involved,
and take precautions to protect themselves.
ENVIRONMENTAL REGULATIONS
•
California LOL: M