PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Dibutyl phosphite 1809-19-4 1760
14.01
11.01
14.02
7.01
4.09
4.06
4.10
4.07
7.11
3.09
Formula Synonyms
C8.H19.O3.P DIBUTYL PHOSPHITE, BUTYL ALCOHOL, HYDROGEN PHOSPHITE, BUTYL PHOSPHITE ((C4H9O)2(HO)P), BUTYL PHOSPHONATE ((BUO)2HPO), BUTYL PHOSPHONATE ((C4H9O)2HPO), DBP 1, DI-N-BUTYL HYDROGEN PHOSPHITE, DI-N-BUTYL PHOSPHITE, DIBUTOXYPHOSPHINE OXIDE, DIBUTYL HYDROGEN PHOSPHITE, DIBUTYL PHOSPHONATE, PHOSPHOROUS ACID, DIBUTYL ESTER
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
194.24 L 1 95 0.986
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
9.6 110 630
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
1.2 14 79
Technical Basis
A review of available sources identified rat and rabbit acute toxicity data (LC50, LD50) for various 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. Although inhalation is the most preferred exposure, the available rat LC50 was not selected for TEEL development since no duration was reported. Instead, a rat oral LD50 was selected as the TEEL-3 basis. TEEL-1 and TEEL-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 LD50 (3200 mg/kg)
This review generated PAC values consistent with Rev. 29A.
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/Dibutyl-phosphite.
Rat oral LD50: Albright & Wilson Inc., #OPB-3(1984). Retrieved from: https://pubchem.ncbi.nlm.nih.gov/compound/Dibutyl-phosphite.
Rat LC50 (no duration reported): Albright & Wilson Inc. Vol. #OPB-3, Pg. 1984. See “Hazard Data > Hazard > Mortality Response Summary Value”. Retrieved from: https://comptox.epa.gov/dashboard/chemical/details/DTXSID0027438
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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.