NIOSH Pocket Guide to Chemical Hazards

Lithium hydride CAS 7580-67-8
LiH RTECS OJ6300000
Synonyms & Trade Names
Lithium monohydride
DOT ID & Guide
1414 138
2805 138 (fused, solid)
Exposure
Limits
NIOSH REL: TWA 0.025 mg/m3
OSHA PEL: TWA 0.025 mg/m3
IDLH 0.5 mg/m3 Conversion
Physical Description
Odorless, off-white to gray, translucent, crystalline mass or white powder.
MW: 7.95
BP: Decomposes
MLT: 1256°F
Sol: Reacts
VP: 0 mmHg (approx)
IP: NA

Sp.Gr: 0.78
Fl.P: NA
UEL: NA
LEL: NA

Combustible Solid that can form airborne dust clouds which may explode on contact with flame, heat, or oxidizers.
Incompatibilities & Reactivities
Strong oxidizers, halogenated hydrocarbons, acids, water [Note: May ignite SPONTANEOUSLY in air and may reignite after fire is extinguished. Reacts with water to form hydrogen & lithium hydroxide.]
Measurement Methods
OSHA ID121
Personal Protection & Sanitation
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: Brush (DO NOT WASH)
Remove: When wet or contaminated
Change: Daily
Provide: Eyewash, Quick drench (>0.5 mg/m3)
First Aid (See procedures)
Eye: Irrigate immediately
Skin: Brush (DO NOT WASH)
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations NIOSH/OSHA
Up to 0.25 mg/m3: (APF = 10) Any air-purifying respirator with a high-efficiency particulate filter/(APF = 10) Any supplied-air respirator
Up to 0.5 mg/m3: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode*/(APF = 50) Any air-purifying, full-facepiece respirator with a high-efficiency particulate filter/(APF = 25) Any powered, air-purifying respirator with a high-efficiency particulate filter*/(APF = 50) Any self-contained breathing apparatus with a full facepiece/(APF = 50) Any supplied-air respirator with a full facepiece
Emergency or planned entry into unknown concentrations or IDLH conditions: (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode/(APF = 10,000) Any supplied-air 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 positive-pressure breathing apparatus
Escape: (APF = 50) Any air-purifying, full-facepiece respirator with a high-efficiency particulate filter/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin; eye, skin burns; mouth, esophagus burns (if ingested); nausea; muscle twitches; mental confusion; blurred vision
Target Organs Eyes, skin, respiratory system, central nervous system
See also: INTRODUCTION