PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Triazofos; (Triazophos) 24017-47-8
6.00
15.02
4.01
4.08
7.01
7.00
11.00
4.06
4.07
3.08
Formula Synonyms
C12H16N3O3PS TRIAZOFOS, 1-PHENYL-1,2,4-TRIAZOLYL-3-(O,O-DIETHYL THIONOPHOSPHATE), 1-PHENYL-3-(O,O-DIETHYL THIONOPHOSPHORYL)-1,2,4-TRIAZOLE, 1H-1,2,4-TRIAZOL-3-OL, 1-PHENYL-, O-ESTER WITH O,O-DIETHYL P, HOE 2960, HOE 2960 OJ, HOSTATHION, HOSTATION, O,O-DIETHYL O-(1-PHENYL-1H-1,2,4-TRIAZOL-3-YL)PHOSPHOROTHIOA, PHOSPHOROTHIOIC ACID, O,O-DIETHYL O-(1-PHENYL-1,2,4-TRIAZOLY, TRIAZOPHOS
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
313.34 L 5 350 0.00001 25 1.25 @ 20°C
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
0.25 2.8 12
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
0.020 0.22 0.94
Technical Basis
A review of available sources identified a LOC and acute toxicity data (LC50, LD50) 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. Inhalation exposures were. The most preferred route toxicity, a rat LC50, was selected as the TEEL-3 basis and scaled to 60-minute equivalents using the ten Berge equation (Section 3.3.4). The LOC was selected as the TEEL-2. A TEEL-1 value was derived according to Table 3.5.
• TEEL-1 = TEEL-2/11
• TEEL-2 = LOC (0.0028 g/m3)
• TEEL-3 = Rat LC50 (280 mg/m3/4H)
This review generated TEEL values consistent with Rev. 29A*.
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/Triazophos
Rat LC50 .Egeszsegtudomany., 24(173), 1980. Retrieved from: https://pubchem.ncbi.nlm.nih.gov/compound/Triazophos.
LOC. Appendix C, pg. C-9. 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.