PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Disodium 3,6-endoxohexahydrophthalate 129-67-9
15.01
11.01
15.02
4.09
4.07
3.07
5.10
Formula Synonyms
C8H8Na2O5
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
230.14 S 144 1.431
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
0.15 1.7 10
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
0.016 0.18 1.1
Technical Basis
A review of available sources identified human (TDLo, sex unspecified) and animal acute toxicity data (LD50) for several 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. The most preferred route, a rat oral LD50¬, was selected as the TEEL-3 basis. Although the human TDLo was considered as a TEEL-2 basis, it was not selected because 1) the sex of the subject could not be verified (Section 3.3.2) , and 2) it would result in a TEEL-2 greater than the TEEL-3 (for an assumed sex of female). Instead, TEEL-2 and TEEL-1 values were derived according to Table 3.5.
• TEEL-1 = TEEL-2/11
• TEEL-2 = TEEL-3/6
• TEEL-3 = Rat oral LD50 (51 mg/kg)
This review generated TEEL values that are consistent with Rev. 29A*.
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/Endothal-disodium
Rat oral LD50: EXTOXNET. 1995. Pesticide Information Profile: Disodium Endothall. Retrieved from http://extoxnet.orst.edu/pips/endothal.htm or https://www.noaa.gov/sites/default/files/legacy/document/2020/Oct/07354626353.pdf
Human TDLo oral (7-8 grams): Pesticide Information Profile: Disodium Endothall. Retrieved from: http://extoxnet.orst.edu/pips/endothal.htm or https://www.noaa.gov/sites/default/files/legacy/document/2020/Oct/07354626353.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.