PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Calcium hydride 7789-78-8
11.01
15.02
7.01
4.07
Formula Synonyms
CaH2
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
42.24 S 1.7
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
12 130 790
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
6.9 75 460
Technical Basis
A review of available sources did not identify exposure limits or acute toxicity data for calcium hydride. Analysts evaluated GHS health hazards reported for this chemical (H315 and H319, Category 2), which indicate a mid-level hazard. Considering this, analysts assumed an HHR=2 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=2
This review generated PAC values consistent with Rev. 29A.
References
Chemical information: https://comptox.epa.gov/dashboard/chemical/details/DTXSID60894886
Millipore Sigma SDS: https://www.emdmillipore.com/US/en/product/Calcium-hydride,MDA_CHEM-802100
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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.