PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| EPN; (O-Ethyl-O-(4-nitrophenyl) phenylthiophosphonate) | 2104-64-5 |
6.00
15.01
4.01
11.01
14.02
4.08
4.05
7.01
8.00
7.00
|
||||||||||
| Formula | Synonyms | |||||||||||
| C14.H14.N.O4.P.S | EPN, BENZENEPHOSPHONIC ACID, THIONO-, ETHYL-P-NITROPHENYL ESTER, BENZENEPHOSPHOTHIONIC ACID, ETHYL 4-NITRO-PHENYL ESTER, ENT 17,798, EPN 300, ETHOXY-4-NITROPHENOXYPHENYLPHOSPHINE SULFIDE, ETHYL P-NITROPHENYL BENZENETHIONOPHOSPHONATE, ETHYL P-NITROPHENYL BENZENETHIOPHOSPHATE, ETHYL P-NITROPHENYL BENZENETHIOPHOSPHONATE, ETHYL P-NITROPHENYL PHENYLPHOSPHONOTHIOATE, ETHYL P-NITROPHENYL THIONOBENZENEPHOSPHATE, ETHYL P-NITROPHENYL THIONOBENZENEPHOSPHONATE, O-ETHYL O-(4-NITROPHENYL) BENZENETHIONOPHOSPHONATE, O-ETHYL O-(4-NITROPHENYL) PHENYLPHOSPHONOTHIOATE, O-ETHYL O-(P-NITROPHENYL) PHENYLPHOSPHONOTHIOATE, O-ETHYL O-P-NITROPHENYL BENZENETHIOPHOSPHONATE, O-ETHYL O-P-NITROPHENYL PHENYLPHOSPHONOTHIOLATE, O-ETHYL O-P-NITROPHENYL PHENYLPHOSPHOROTHIOATE, O-ETHYL PHENYL P-NITROPHENYL THIOPHOSPHONATE, PHENOL, P-NITRO-, O-ESTER WITH O-ETHYL PHENYL PHOSPHONOTHIOA, PHENYLPHOSPHONOTHIOATE, O-ETHYL-O-P-NITROPHENYL-, PHOSPHONOTHIOIC ACID, PHENYL-, ETHYL P-NITROPHENYL ESTER, PHOSPHONOTHIOIC ACID, PHENYL-, O-ETHYL O-(4-NITROPHENYL) EST, PHOSPHONOTHIOIC ACID, PHENYL-, O-ETHYL O-(P-NITROPHENYL) EST, PHOSPHONOTHIOIC ACID, PHENYL-, O-ETHYL O-(P-NITROPHENYL)ESTE, PIN, SANTOX | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 323.32 | L/S | 36 | 25 | 1.268 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.20 | 5.0 | 50 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.015 | 0.38 | 3.8 |
Technical Basis
A review of available sources identified exposure limits (IDLH (1990), LOC, OEL-STEL, TWAs). Data sources were selected according to the hierarchy listed in Table 3.1. The IDLH (1990) was selected as the TEEL-3. The LOC was selected as the TEEL-2. The OEL-STEL (Denmark) was selected as the TEEL-1 basis.
• PAC-1 = TEEL-1 = OEL-STEL (Denmark, 0.2 mg/m3)
• PAC-2 = TEEL-2 = LOC (0.005 g/m3)
• PAC-3 = TEEL-3 = IDLH (1990) (50 mg/m3)
This review generated PAC-3 and PAC-2 values consistent with Rev. 29A and a PAC-1 inconsistent with Rev. 29A. The Rev. 29A TEEL-1 basis was the TLV-TWA; while the current TEEL-1 is an OEL-STEL (see Note, Table 3.5). The Rev. 29A and current TEEL-3 and TEEL-2 values, source, and methodology are consistent.
• PAC-1 = TEEL-1 = OEL-STEL (Denmark, 0.2 mg/m3)
• PAC-2 = TEEL-2 = LOC (0.005 g/m3)
• PAC-3 = TEEL-3 = IDLH (1990) (50 mg/m3)
This review generated PAC-3 and PAC-2 values consistent with Rev. 29A and a PAC-1 inconsistent with Rev. 29A. The Rev. 29A TEEL-1 basis was the TLV-TWA; while the current TEEL-1 is an OEL-STEL (see Note, Table 3.5). The Rev. 29A and current TEEL-3 and TEEL-2 values, source, and methodology are consistent.
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/O-Ethyl-O-_4-nitrophenyl_-phenylphosphonothioate
TWAs: https://www.osha.gov/chemicaldata/309
OEL-STEL: https://ilv.ifa.dguv.de/limitvalues/28531
LOC: Appendix C, pg. C-4): https://www.epa.gov/sites/default/files/2015-09/documents/technical_guidance_for_hazard_analysis.pdf
IDLH (1990): https://www.cdc.gov/niosh/idlh/2104645.html