PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Iron sulfide 1317-37-9










Formula Synonyms
FeS
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
87.91 S 1188 4.7
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
0.33 3.6 22
Technical Basis
A review of available sources did not identify exposure limits or acute toxicity data for iron sulfide. SAX's Dangerous Properties of Industrial Materials classifieds iron sulfide as an HHR=3; this classification is supported by literature that indicates hydrogen sulfide is generated from inorganic salts, resulting in similar toxic effects. As such, analysts assumed an HHR=3 as the TEEL-3 basis. The TEEL-2 and TEEL-1 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 that are 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, in agreement with the recommended health hazard rating of SAX’s Dangerous Properties of Industrial Materials (12th edition, 2012). TEEL-2 and TEEL-1 values were derived from this TEEL-3.
References
Chemical information: https://comptox.epa.gov/dashboard/chemical/details/DTXSID5061665
Discussion of spontaneous H2S formation (see Section 2.1.1): A. Martelli, et. al, Pharmacological Research, Volume 196, 2023. https://doi.org/10.1016/j.phrs.2023.106947
Hydrogen sulfide toxicological profile: https://www.atsdr.cdc.gov/toxprofiles/tp114.pdf
SAX's Dangerous Properties of Industrial Materials, 12th ed., Richard J. Lewis. John Wiley & Sons, Inc., Hoboken, NJ (2012).
Search Again