PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Lithium azide 19597-69-4
7.01
15.01
15.02
4.08
4.01
4.05
11.00
4.07
3.08
3.05
Formula Synonyms
LiN3
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
48.96 S 1.83
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
1.2 13 79
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
0.60 6.5 39
Technical Basis
A review of available sources did not identify exposure limits or acute toxicity data for lithium azide. Reported GHS health hazard ratings (H300, H310 and H330 Category 1,2) indicate a high-level health hazard, approximately equivalent to an HHR=3. Considering this, analysts assumed an HHR=3 as the TEEL-3 basis (Section 3.4.5). TEEL-2 and TEEL-1 values were derived according to Table 3.5.
• PAC-1 = TEEL-1 = TEEL-2/11
• PAC-2 = TEEL-2 = TEEL-3/6
• PAC-3 = TEEL-3 = HHR=3
This review generated PAC values inconsistent with Rev. 29A. The Rev. 29A TEEL-1 basis was a TLV-TWA for particles not otherwise specified (Section 3.5.2), from which the TEEL-2 and TEEL-3 were derived (Table 3.5). The current TEEL-3 basis is an assumed HHR=3, from analysis of GHS health hazard statements, from which TEEL-2 and TEEL-1 were derived (Table 3.5).
References
Chemical information and GHS health hazard ratings retrieved from: https://pubchem.ncbi.nlm.nih.gov/compound/Lithium-azide and https://www.chemicalbook.com/ProductChemicalPropertiesCB2739539_EN.htm
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PAC values marked with a subscript "A" correspond to 60-minute AEGL values.
PAC values marked with a subscript "E" correspond to ERPG values.
PAC values marked by * are >= 10% lower explosive limit (LEL) but < 50% LEL.
PAC values marked by ** are > 50% LEL but < 100% LEL.
PAC values marked by *** are >= LEL.