PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Phosphoric acid, dimethyl-p-(methylthio)phenyl ester 3254-63-5
6.00
7.00
7.01
11.00
4.08
15.02
4.01
4.05
8.00
4.07
Formula Synonyms
C9H13O4PS PHOSPHORIC ACID, DIMETHYL 4-(METHYLTHIO) PHENYL ESTER, 4-METHYLTHIOPHENYL DIMETHYL PHOSPHATE, ALLIED GC 6506, DIMETHYL P-(METHYLTHIO)PHENYL PHOSPHATE, ENT 25734, FENTHION S 2145 OXON, GC 6506, HA-1200, O,O-DIMETHYL O-(4-METHYLMERCAPTOPHENYL) PHOSPHATE, PHENOL, P-(METHYLTHIO)-, DIMETHYL PHOSPHATE, PHOSPHORIC ACID, DIMETHYL P-(METHYLTHIO)PHENYL ESTER
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
248.25 L 300 0.001 25 1.273 @ 21°C
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
0.64 7.0 42
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
0.063 0.69 4.1
Technical Basis
A review of available sources identified a LOC and acute toxicity data (LD50) for several species and routes. Data sources were selected according to the hierarchy listed in Table 3.1. Toxicity data were evaluated using factors in Tables 3.2, 3.3, and 3.4. The LOC was selected as the TEEL-2. Although considered, toxicity data was not selected for TEEL-3 development and the analyst instead prioritized the exposure limit due to the primary route of toxicity for this chemical is via skin contact. TEEL-3 and TEEL-1 values were derived according to Table 3.5.
• PAC-1 = TEEL-1 = TEEL-2/11
• PAC-2 = TEEL-2 = LOC (0.007 mg/m3)
• PAC-3 = TEEL-3 = TEEL-2 x 6
This review generated PAC values consistent with Rev. 29A*.
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/18621
LOC. Appendix C, pg. C-7. https://www.epa.gov/sites/default/files/2015-09/documents/technical_guidance_for_hazard_analysis.pdf
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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.