PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Methyl fluorosulfate 421-20-5
14.01
14.02
11.00
11.01
4.01
7.01
4.07
Formula Synonyms
CH3FO3S
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
114.1 L 92 1.427 @ 16°C
PAC Values
PAC Values (Original Units: ppm)
PAC-1 PAC-2 PAC-3
0.0021 0.023 0.14
Converted PAC Values (mg/m3)
PAC-1 PAC-2 PAC-3
0.0098 0.11 0.65
Technical Basis
A review of available sources identified acute toxicity data (LC50, LD50, LDLo) for several species and routes. Data sources were selected according to the hierarchy listed in Table 3.1. Toxicity data were selected according to type of exposure, species, and route according to the hierarchies stated in Sections 3.3.1, 3.3.2, and evaluated using factors in Tables 3.2, 3.3, and 3.4. The most preferred species and route acute data, a 1-hour rat LC50, was selected as the TEEL-3 basis. TEEL-2 and TEEL-1 values were derived according to Table 3.5.
• TEEL-1 = TEEL-2/11
• TEEL-2 = TEEL-3/6
• TEEL-3 = Rat LC50 (5 ppm/1H)
This review generated TEEL values that are consistent with Rev. 29A*.
References
Rat LC50. American Industrial Hygiene Association Journal., 40(600), 1979 [PMID:484483]. Retrieved from: https://pubchem.ncbi.nlm.nih.gov/compound/Methyl-fluorosulfonate
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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.