PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Diphenyl chlorophosphate; (Diphenylphosphoryl chloride) 2524-64-3
11.01
14.01
14.02
4.07
Formula Synonyms
C12.H10.Cl.O3.P
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
268.63596 L 1.296
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
7.9 87 520
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
0.72 7.9 47
Technical Basis
A review of limited sources identified rat oral LD50 toxicity data that was evaluated using factors in Tables 3.2, 3.3, and 3.4. Although this study identified an LD50, only 2 of 6 rats died during the study and there is limited additional statistical data to support the assertion of an LD50; therefore, analysts evaluated the reported toxicity as an LDLo and it was selected as the TEEL-3 basis. TEEL-1 and -2 values were derived according to Table 3.5.
• PAC-1 = TEEL-1 = TEEL-2/11
• PAC-2 = TEEL-2 = TEEL-3/6
• PAC-3 = TEEL-3 = Rat oral LDLo (2000 mg/kg)
This review generated PAC values inconsistent with Rev. 29A. The Rev. 29A TEEL-3 basis was a health hazard rating (HHR=3), while the current TEEL-3 basis is a rat oral LDLo for diphenyl chlorosphosphate. The TEEL-2 and TEEL-1 methodology is the same, with differences due to the change in TEEL-3.
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/Diphenyl-chlorophosphate.
Rat oral LD¬Lo: https://echa.europa.eu/de/registration-dossier/-/registered-dossier/19780/7/3/2
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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.