PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fonofos | 944-22-9 |
6.00
14.01
4.01
11.01
4.08
4.05
7.01
7.00
11.00
4.09
|
||||||||||
| Formula | Synonyms | |||||||||||
| C10.H15.O.P.S2 | FONOFOS, (.+-.)-FONOFOS, DIFONATE, DIFONATUL, DYFONAT, DYFONATE, DYFONATE 10G, DYFONATE 20G, DYFONATE®, DYPHONATE, ENT 25,796, ETHYLPHOSPHONODITHIOIC ACID O-ETHYL S-PHENYL ESTER, FONOPHOS, N 2790, N-2790, O-ETHYL S-PHENYL ETHYLDITHIOPHOSPHONATE, O-ETHYL S-PHENYL ETHYLPHOSPHONODITHIOATE, O-ETHYL S-PHENYL ETHYLPHOSPHONOTHIOLOTHIONATE, O-ETHYL-S-PHENYL ETHYLPHOSPHOROTHIOATE, PHOSPHONODITHIOIC ACID, ETHYL-, O-ETHYL S-PHENYL ESTER, STAUFFER N 2790 | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 246.34 | L | 380 | 0.00021 | 25 | 1.16 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.30 | 1.3 | 53 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.030 | 0.13 | 5.3 |
Technical Basis
A review of available sources identified exposure limits (PEL-TWA, REL-TWA, TLV-TWA, 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 based on 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 toxicity data, a 1-hour rat LC50, was selected as the TEEL-3 basis and scaled to 60-minute equivalent using the ten Berge equation (Section 3.3.4). TEEL-2 values were derived according to Table 3.5. The TLV-TWA was selected as the TEEL-1 basis.
• TEEL-1 = TLV-TWA (0.1 mg/m3) x 3
• TEEL-2 = LOC (1.3 mg/m3)
• TEEL-3 = Rat LC50 (1900 mg/m3/1H)
This review generated TEEL values consistent with Rev. 29A
• TEEL-1 = TLV-TWA (0.1 mg/m3) x 3
• TEEL-2 = LOC (1.3 mg/m3)
• TEEL-3 = Rat LC50 (1900 mg/m3/1H)
This review generated TEEL values consistent with Rev. 29A
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/Fonofos.
Exposure limits: https://www.osha.gov/chemicaldata/749
LOC: Appendix C, pg. C-5: https://www.epa.gov/sites/default/files/2015-09/documents/technical_guidance_for_hazard_analysis.pdf
Rat LC50: Agrochemicals Handbook, with updates, Hartley, D., and H. Kidd, eds., Nottingham, Royal Soc of Chemistry, 1983-86, A214(1983). Retrieved from: https://pubchem.ncbi.nlm.nih.gov/compound/Fonofos