NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

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 See: 7580678
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
See: NMAM or OSHA Methods
Personal Protection & Sanitation
(See protection)
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
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   See ICSC CARD: 0813   See MEDICAL TESTS: 0129