PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Perlite; (Fused NaKAl silicate, < 1% quartz) 93763-70-3
16.01
16.02
11.01
10.00
Formula Synonyms
[Unspecified]
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
0 S amor 0.13
PAC Values
PAC Values (Original Units: ppm)
PAC-1 PAC-2 PAC-3
0.64 9.8 60
Converted PAC Values (mg/m3)
PAC-1 PAC-2 PAC-3
0 0 0
Technical Basis
A review of available sources was able to identify exposure limit and toxicity data for this chemical. A mouse oral LD50 was selected as the TEEL-3 basis. A TEEL-2 was calculated from this TEEL-3, in accordance with guidelines in the handbook (see Table 3.5.) The PEL-TWA exposure limit was selected as the TEEL-1 basis (Table 3.1.)

TEEL-1 = PEL-TWA x 3
TEEL-2 = TEEL-3/6
TEEL-3 = Mouse oral LD50 (12960 mg/kg)

This review generated values that are consistent with Rev. 29A.
References
https://pubchem.ncbi.nlm.nih.gov/compound/133082075
https://pubchem.ncbi.nlm.nih.gov/compound/121596494#section=DSSTox-Substance-ID
https://www.cdc.gov/niosh-rtecs/SD502B70.html
https://www.cdc.gov/niosh/npg/npgd0491.html
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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.