Lithium hydride

  • Lithium hydride, fused solid (UN 2805)
Formula
LiH
Structure
Description
Odorless, off-white, translucent powder. Hygroscopic, pyrophoric.
Uses
Reducing agent, condensing agent with ketones & acetic esters, desiccant, in hydrogen generators.

Registry Numbers and Inventories.
CAS
7580-67-8
EC (EINECS/ELINCS)
231-484-3
EC Class
highly flammable, corrosive
R 14/15 34
S 7/8 26 36/37/39 43 45
RTECS
OJ6300000
RTECS class
Human Data
UN (DOT)
1414, 2805
Merck
13,5555
Beilstein/Gmelin
13702 (G)
Swiss Giftliste 1
G-2359
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
HLi
Formula mass
7.95
Melting point, °C
680
Decomposition point, °C
850
Vapor pressure, mmHg
10 (720 C)
Density
0.685 - 0.725 g/cm3
Solubility in water
Reacts
Thermal expansion
0.000032/K

Hazards and Protection.
Storage
Keep container closed when not in use. Keep away from water. Corrosives area. Store protected from light.
B6 E
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Keep container tightly closed. Do not get on skin or in eyes. Do not ingest or inhale. Use with adequate ventilation. Store protected from light. Discard contaminated shoes.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear butyl rubber gloves, apron, and/or clothing. Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear butyl rubber gloves, apron, and/or clothing. Wear appropriate protective clothing to minimize contact with skin.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use. Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions.
Small spills/leaks
Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation. Do not get water on spilled substances or inside containers.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Irritating and toxic fumes and gases, hydrogen gas, lithium hydroxide, hydrogen gas, lithium hydride.

Fire.
Autoignition, °C
200
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Water Reactive. Material will react with water and may release a flammable and/or toxic gas. Use water spray to keep fire-exposed containers cool. Containers may explode in the heat of a fire. Extinguishing media: DO NOT USE WATER! Use only graphite powder, soda ash, powdered sodium chloride, or an appropriate metal-fire-extinguishing dry powder. Do NOT get water inside containers. Cool containers with flooding quantities of water until well after fire is out. For large fires use dry sand, dry chemical, soda ash or lime or withdraw from area and let fire burn.
Fire potential
Lithium hydride is a flammable solid and is dangerous when wet. Spontaneous ignition occurs when nitrous oxide and lithium hydride or hydrazine are mixed.
Hazards
Produce flammable gases on contact with water. May ignite on contact with water or moist air. Some react vigorously or explosively on contact with water. May be ignited by heat, sparks or flames. May re-ignite after fire is extinguished. Some are transported in highly flammable liquids. Runoff may create fire or explosion hazard.
Combustion products
Combustion may produce irritants and toxic gases.
Health
3
 
Flammability
2
 
 
Reactivity
2
 
 
Special
W

Health.
Exposure limit(s)
TLV: ppm; 0.025 mg/m3 (as TWA) (ACGIH 1991-1992). OSHA PEL: TWA 0.025 mg/m3 NIOSH REL: TWA 0.025 mg/m3 NIOSH IDLH: 0.5 mg/m3
Poison_Class
1
Exposure effects
Seizures, coma, tremor, ataxia, and lethargy have been associated with lithium ion intoxication. Malformations and cardiac effects have been observed with lithium ion in therapeutic doses.
   Ingestion
May cause severe and permanent damage to the digestive tract. Causes gastrointestinal tract burns.
   Inhalation
Causes chemical burns to the respiratory tract.
   Skin
Causes skin burns.
   Eyes
Causes eye burns.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes.
   Eyes
Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes).

Transport.
UN number
1414, 2805
Response guide
Hazard class
4.3
Packing Group
I
 
USCG CHRIS Code
LHD
 
HS Code
2850 00 20
 
Std. Transport #
4916425