PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Hafnium 7440-58-6 2545
18.00
15.01
15.02
11.01
11.00
10.00
3.10
4.10
Formula Synonyms
Hf HAFNIUM POWDER, DRY, HAFNIUM POWDER, WETTED WITH NOT LESS THAN 25% WATER, CELTIUM, ELEMENTAL HAFNIUM, HAFNIO, EN POLVO, HUMEDECIDO CON NO MENOS DEL 25% DE AGUA (D, HAFNIUM ELEMENT, HAFNIUM EN POUDRE, HUMIDIFIÉ AVEC AU MOINS 25% D^EAU (DOT FR, HAFNIUM METAL
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
178.49 S 2233 4603 2416 13.3
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
1.5 17 99
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
0.21 2.3 14
Technical Basis
No technical basis available
References
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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.