ELEMENTS by ICP (Hot Block/HCl/HNO3 Ashing): METHOD 7303, Issue 1, dated 15 March 2003 - Page 5 of 6 TABLE 2. EXPOSURE LIMITS, CAS #, RTECS Element (Symbol)
OSHA
Exposure Limits, mg/m3 (Ca = carcinogen) NIOSH ACGIH
CAS #
RTECS
Silver (Ag)
7440-22-4
VW3500000
0.01 (dust, fume, metal)
0.01 (metal, soluble)
0.1 (metal) 0.01 (soluble)
Aluminum (Al)
7429-90-5
BD0330000
15 (total dust) 5 (respirable)
10 (total dust) 5 (respirable fume) 2 (salts, alkyls)
10 (dust) 5 (powders, fume) 2 (salts, alkyls)
Arsenic (As)
7440-38-2
CG0525000
varies
C 0.002, Ca
0.01, Ca
Barium (Ba)
7440-39-3
CQ8370000
0.5
0.5
0.5
Beryllium (Be)
7440-41-7
DS1750000
0.002, C 0.005
0.0005, Ca
0.002, Ca
Calcium (Ca)
7440-70-2
--
varies
varies
varies
Cadmium (Cd)
7440-43-9
EU9800000
0.005
lowest feasible, Ca
0.01 (total), Ca 0.002 (respir.), Ca
Cobalt (Co)
7440-48-4
GF8750000
0.1
0.05 (dust, fume)
0.02 (dust, fume)
Chromium (Cr)
7440-47-3
GB4200000
0.5
0.5
0.5
Copper (Cu)
7440-50-8
GL5325000
1 (dust, mists) 0.1 (fume)
1 (dust) 0.1 (fume)
1 (dust, mists) 0.2 (fume)
Iron (Fe)
7439-89-6
NO4565500
10 (dust, fume)
5 (dust, fume)
5 (fume)
Potassium (K)
7440-09-7
TS6460000
--
--
--
Lanthanum
7439-91-0
--
–
–
--
Lithium (Li)
7439-93-2
--
--
--
--
Magnesium (Mg)
7439-95-4
OM2100000
15 (dust) as oxide 5 (respirable)
10 (fume) as oxide
10 (fume) as oxide
Manganese (Mn)
7439-96-5
OO9275000
C5
1; STEL 3
5 (dust) 1; STEL 3 (fume)
Molybdenum (Mo)
7439-98-7
QA4680000
5 (soluble) 15 (total insoluble)
5 (soluble) 10 (insoluble)
5 (soluble) 10 (insoluble)
Nickel (Ni)
7440-02-0
QR5950000
1
0.015, Ca
0.1 (soluble) 1 (insoluble, metal)
Phosphorus (P)
7723-14-0
TH3500000
0.1
0.1
0.1
Lead (Pb)
7439-92-1
OF7525000
0.05
0.05
0.05
Antimony (Sb)
7440-36-0
CC4025000
0.5
0.5
0.5
Selenium (Se)
7782-49-2
VS7700000
0.2
0.2
0.2
Tin (Sn)
7440-31-5
XP7320000
2
2
2
Strontium (Sr)
7440-24-6
–
–
–
--
Tellurium (Te)
13494-80-9
WY2625000
0.1
0.1
0.1
Titanium (Ti)
7440-32-6
XR1700000
--
--
--
Thallium (Tl)
7440-28-0
XG3425000
0.1 (skin) (soluble)
0.1 (skin) (soluble)
0.1 (skin)
Vanadium (V)
7440-62-2
YW240000
--
C 0.05
--
Tungsten
7440-33-7
–
5
5 10 (STEL)
5 10 (STEL)
Yttrium (Y)
7440-65-5
ZG2980000
1
N/A
1
Zinc (Zn)
7440-66-6
ZG8600000
–
--
--
Zirconium (Zr)
7440-67-7
ZH7070000
5
5, STEL 10
5, STEL 10
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition
