PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Aluminum tris(dihydrogen phosphate); (Phosphoric acid, aluminum salt (3:1)) 13530-50-2
19.00
Formula Synonyms
Al.3(H3.O4.P)
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
320.96672 S
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
3.0 30 150
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
0.23 2.3 11
Technical Basis
A review of available sources did not identify exposure limits or acute toxicity data for aluminum tris(dihydrogen phosphate). Instead, analysts evaluated exposure limits for phosphoric acid (CASRN: 7664-38-2) and aluminum (CASRN: 134-42-81) for TEEL development. Data sources were selected according to the hierarchy listed in Table 3.1. Considering that aluminum tris(dihydrogen phosphate) is soluble, analysts selected the phosphoric acid ERPGs for TEELs, due to their priority among the emergency exposure limits (Section 1).
• TEEL-1 = ERPG-1 (phosphoric acid; CASRN: 7664-38-2)
• TEEL-2 = ERPG-2 (phosphoric acid; CASRN: 7664-38-2)
• TEEL-3 = ERPG-3 (phosphoric acid; CASRN: 7664-38-2)
This review generated TEEL values inconsistent with Rev. 29A. The Rev. 29A TEEL-1 was a weight adjusted TLV-TWA (insoluble aluminum), from which TEEL-2 and TEEL-3 values were derived. The current TEELs are phosphoric acid ERPGs, a higher priority exposure limit source (Section 1).
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/Aluminium-dihydrogen-phosphate and https://comptox.epa.gov/dashboard/chemical/properties/DTXSID2094005
ERPGs (phosphoric acid, CASRN: 7664-38-2): https://www.osha.gov/chemicaldata/621
Aluminum and insoluble compounds TLV-TWA; https://www.acgih.org/aluminum-metal-and-insoluble-compounds/
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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.