Lithium hydride

Synonyms & Trade Names
Lithium monohydride
CAS No.
7580-67-8
RTECS No.
DOT ID & Guide
1414 138
2805 138(fused, solid)
Formula
LiH
Conversion
IDLH
0.5 mg/m3
See: 7580678
Exposure Limits
NIOSH REL
TWA 0.025 mg/m3
OSHA PEL
TWA 0.025 mg/m3
Measurement Methods
OSHA ID121
See: NMAM or OSHA Methods
Physical Description
Odorless, off-white to gray, translucent, crystalline mass or white powder.
Molecular Weight
7.95
Boiling Point
Decomposes
Melting Point
1256°F
Solubility
Reacts
Vapor Pressure
0 mmHg (approx)
Ionization Potential
NA
Specific Gravity
0.78
Flash Point
NA
Upper Exposive Limit
NA
Lower Explosive Limit
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.]
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
Personal Protection/Sanitation
(See protection codes)
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 an N100, R100, or P100 filter (including N100, R100, and P100 filtering facepieces) except quarter-mask respirators.
Click here for information on selection of N, R, or P filters.
(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 an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
(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 an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 0813   MEDICAL TESTS: 0129
Page last reviewed: October 17, 2018