PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Sodium-Potassium 11135-81-2 1422
14.01
4.01
11.01
14.02
11.00
4.09
4.07
10.00
4.11
Formula Synonyms
KNa POTASSIUM SODIUM ALLOYS, POTASIO Y SODIO, ALEACIONES DE (DOT SPANISH), POTASSIUM ET SODIUM, ALLIAGES DE (DOT FRENCH), SODIO Y POTASIO, ALEACIONES DE (DOT SPANISH), SODIUM ALLOY, NONBASE, K,NA, SODIUM ET POTASSIUM, ALLIAGES DE (DOT FRENCH), SODIUM POTASSIUM ALLOYS
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
38.55 L/S
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
0.50 5.0 50
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
0.32 3.2 32
Technical Basis
A review of available sources did not identify exposure limits or acute toxicity data for this chemical. Instead, sodium hydroxide (CASRN: 1310-73-2) and potassium hydroxide (CASRN: 1310-58-3) were evaluated because these metal hydroxides are produced when the alloy is exposed to moisture. ERPG values for sodium hydroxide were identified. Additionally, a rat oral LD50 for potassium hydroxide was evaluated; resulting TEEL values were comparable to those of the sodium hydroxide ERPGs (TEEL-3 = 54 mg/m3, TEEL-2 = 9.0 mg/m3. TEEL-1= 0.82 mg/m3). The sodium hydroxide ERPGs were selected as the TEELs due to their priority among the emergency exposure limits (Section 1).
• TEEL-1 = ERPG-1 (sodium hydroxide, CASRN: 1310-73-2)
• TEEL-2 = ERPG-2 (sodium hydroxide, CASRN: 1310-73-2)
• TEEL-3 = ERPG-3 (sodium hydroxide, CASRN: 1310-73-2)
This review generated TEEL values consistent with those found in Rev. 29A.
References
Description: https://www.americanelements.com/potassium-sodium-alloy-11135-81-2
ERPGs (sodium hydroxide, CASRN: 1310-73-2): https://cameochemicals.noaa.gov/chemical/9073
https://pubchem.ncbi.nlm.nih.gov/compound/Sodium-potassium.
Potassium hydroxide (CASRN: 1310-73-2): Fundamental and Applied Toxicology., 8(97), 1987.. Retrieved from https://pubchem.ncbi.nlm.nih.gov/compound/Potassium-Hydroxide
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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.