ELEMENTS by ICP (Microwave Digestion): METHOD 7304, Issue 1, dated 25 June 2014 - Page 7 of 11
Table 2. EXPOSURE LIMITS, CAS #, RTECS [1,14,15] Exposure Limits, mg/m3 (C = ceiling limit) OSHA NIOSH
Element (Symbol)
CAS #
RTECS #
Aluminum (Al)
7429-90-5
BD0330000
15 (total dust) 5 (respirable)
10 (total dust) 5 (respirable, fume)
Arsenic (As)
7440-38-2
CG0525000
0.010 (inorganic)
C 0.002(1)
Barium (Ba)
7440-39-3
CQ8370000
0.5 (soluble)
0.5 (soluble)
Beryllium (Be)
7440-41-7
DS1750000
0.002, C 0.005
C 0.0005(1)
Cadmium (Cd)
7440-43-9
EU9800000
0.005
lowest feasible conc.(1)
Calcium (Ca)
7440-70-2
No OEL
No OEL
Cobalt (Co)
7440-48-4
GF8750000
0.1
0.05 (dust, fume)
Chromium (II) (Cr)
22541-79-3
GB6260000
0.5
0.5
Chromium (III) (Cr)
16065-83-1
GB6261000
0.5
0.5
Chromium (VI) (Cr)
18540-29-9
GB6262000
0.005
0.0002
Cobalt (Co)
7440-48-4
GF8750000
0.1
0.05 (dust, fume)
Copper (Cu)
7440-50-8
GL5325000
1 (dust, mists) 0.1 (fume)
1 (dust, mists) 0.1 (fume)
Iron (Fe)
1309-37-1
NO7400000
10 (fume) as oxide
5 (dust, fume) as oxide
Magnesium (Mg)
1309-48-4
OM3850000
15 (dust) as oxide
--
Manganese (Mn)
7439-96-5
OO9275000
C5
1; STEL 3
Molybdenum (Mo)
7439-98-7
QA4680000
5 (soluble) 15 (total insoluble)
--
Nickel (Ni)
7440-02-0
QR5950000
1
0.015(1)
Phosphorus (P)
7723-14-0
TH3500000
0.1
0.1
Lead (Pb)
7439-92-1
OF7525000
0.05
0.05
Platinum (Pt)
7440-06-4
TP2160000
0.002 (soluble)
1 (metal)
Selenium (Se)
7782-49-2
VS7700000
0.2
0.2
Silver (Ag)
7440-22-4
VW3500000
0.01 (soluble, metal)
0.01 (soluble, metal)
Tellurium (Te)
13494-80-9
WY2625000
0.1
0.1
Titanium (Ti)
7440-32-6
XR1700000
15 (as TiO2)
lowest feasible(1)
Thallium (Tl)
7440-28-0
XG3425000
0.1 (soluble)
0.1(soluble)
Vanadium (V)
7440-62-2
YW240000
C 0.5 (respirable) as V2O5 C 0.1 (fume) as V2O5
C 0.05
Yttrium (Y)
7440-65-5
ZG2980000
1
1
Zinc (Zn)
1314-13-2
ZH4810000
5 (ZnO fume) 15 (ZnO dust) 5 (ZnO respirable)
5; STEL 10 (ZnO fume) 5; C 15 (ZnO dust)
Zirconium (Zr)
7440-67-7
ZH7070000
5
5, STEL 10
(1) Carcinogen
NIOSH Manual of Analytical Methods (NMAM), Fifth Edition
