LITHIUM HYDRIDE†

Chemical Identification
Chemical Identification
CAS # 7580-67-8
Formula

HLi

Synonyms

lithium monohydride

Physical Properties
Physical Properties
Physical description Odorless, off-white to gray, translucent, crystalline mass or white powder.
Boiling point decomposes Molecular weight 7.95
Freezing point/melting point 1256°F Vapor pressure 0 mmHg (approx)
Flash point Vapor density
Specific gravity 0.78 Ionization potential
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating 3 NFPA fire rating 2
NFPA reactivity rating 2 NFPA special instruction W: Reacts violently or explosively with water.
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 1503
Sampling group
Sampler/Sampling media Pre-assembled cassette with mixed cellulose ester filter (MCEF) 0.8 micron (25 or 37 mm) [MAWP025A0 or MAWP037A0]
Sampling time*

240-480 min

Sampling volume (TWA)*

480-960 L

Sampling flow rate (TWA)*

2 L/min

Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments AAS/AES
Method reference OSHA ID-121 (fully validated)
Notes

Results will be reported from the elemental analysis for the element only; the stated identity of the actual sample contents is based on the assumption that the material sampled is as identified by the compliance officer using available documentation of materials and processes.

An elemental result provided may be converted to the desired compound by multiplying the result by the appropriate stoichiometric factor. A 91B report specific to the compound (including the stoichiometric conversion) may by be provided upon request by contacting the laboratory. The stoichiometric factor for lithium hydride from lithium is 1.145.

Analysis for this analyte is based on water solubility.

Special requirements

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Wipe Method
Wipe Method
Sampler/Sampling media
Bulk Method
Bulk Method
On-Site Screening Techniques
On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)
Exposure Limits
Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA

0.025 mg/m³

REL-TWA

0.025 mg/m³

TLV-TWA PEL-TWA

0.025 mg/m³

PEL-STEL REL-STEL TLV-STEL PEL-STEL
PEL-C REL-C TLV-C

0.05 mg/m³ (inhalable particulate matter) [2014]

PEL-C
Skin notation

N

Skin notation

N

Skin notation

N

Skin notation

N

Notes:

See 29 CFR 1910.1000 Table Z-1.

Notes: Notes: Notes:
Health factors:  See NIH-NLM PubChem. IDLH

0.5 mg/m³

Carcinogenic classifications: Not listed Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

0.025 mg/m³/0.1 mg/m³/3 mg/m³

Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Lithium hydride

NIOSH: Pocket Guide to Chemical Hazards - Lithium hydride

Literature References

  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Lithium hydride. See annual publication for most recent information.

Last Updated Date : 01/04/2021