PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Nitrilotris(methylene)trisphosphonic acid; (Amino, tris[methylene phosphonic acid]) 6419-19-8
15.01
15.02
Formula Synonyms
C3.H12.N.O9.P3
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
299.07 L -14 105 1.33 @ 20°C
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
30 69 420
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
2.5 5.6 34
Technical Basis
A review of available sources identified a WEEL-TWA and acute toxicity data (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 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 species and route data, a rat oral LD50, was selected as the TEEL-3 basis. The TEEL-2 was derived according to Table 3.5. The WEEL-TWA was selected as the TEEL-1 basis.
• PAC-1 = TEEL-1 = WEEL-TWA (10 mg/m3) x 3
• PAC-2 = TEEL-2 = TEEL-3/6
• PAC-3 = TEEL-3 = Rat oral LD50 (2100 mg/kg)
This review generated PAC values consistent with Rev. 29A*.
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/16698
WEEL-TWA: https://tera.org/OARS/
Rat LD50. Gigiena i Sanitariya. For English translation, see HYSAAV., 49(2)(67), 1984. Retrieved from: https://pubchem.ncbi.nlm.nih.gov/compound/16698
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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.