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Toxic Elements Found in Electronics

Element

wt. %

Location

(by wt. %)

   
     

Silica

24.8803

Glass, CRT,circuit boards

Plastic

22.9907

Structural, insulation

Iron (Fe)

20.4712

Structural, magnets, CRT, circuit boards

Aluminum (Al)

14.1723

Structural, connectors, CRT, circuit boards

Copper (Cu)

6.9287

Connectors, CRT, circuit boards

Lead (Pb)

6.2988

Solder, CRT (Xray shield), circuit boards

Zinc (Zn)

2.2046

Battery, CRT phosphors, circuit boards

Tin (Sn)

1.0078

Solder, CRT

Nickel (Ni)

0.8503

Structural, magnets, CRT, circuit boards

Barium (Ba)

0.0315

CRT (Xray shielding)

Manganese (Mn)

0.0315

Structural, magnets, CRT, circuit boards

Silver (Ag)

0.0189

Circuit boards, connectors

Beryllium (Be)

0.0157

Thermal conductivity, circuit boards, connectors

Cobalt (Co)

0.0157

Structural, magnets, CRT, circuit boards

Tantalum (Ta)

0.0157

Capacitors, circuit boards, power supply

Titanium (Ti)

0.0157

Pigment, alloying agent for Aluminum structural

Antimony (Sb)

0.0094

Diodes, circuit boards, CRT

Cadmium (Cd)

0.0094

Battery, CRT phosphors, circuit boards

Bismuth (Bi)

0.0063

Thick film wetting agent, circuit boards

Chromium (Cr)

0.0063

Decorative, alloy agent in steel structural

Mercury (Hg)

0.0022

Battery, switches, circuit board

Germanium (Ge)

0.0016

Semiconductor, circuit board

Gold (Au)

0.0016

Connectivity, circuit boards, connectors

Indium (In)

0.0016

Transistor dopant, rectifiers, circuit boards

Ruthenium (Ru)

0.0016

Resistive circuit, circuit boards

Selenium (Se)

0.0016

Rectifiers, circuit boards

Arsenic (As)

0.0013

Transistor dopant, circuit board

Gallium (Ga)

0.0013

Semiconductor, circuit board

Palladium (Pd)

0.0003

Connectivity, circuit boards, connectors

Europium (Eu)

0.0002

CRT phosphor activator, circuit boards

Niobium (Nb)

0.0002

Welding alloy

Vanadium (V)

0.0002

CRT and phosphors

Yttrium (Y)

0.0002

CRT and phosphors

Platinum (Pt)

> 0.

Thick film conductor, circuit boards

Rhodium (Rh)

> 0.

Thick film conductor, circuit boards

Terbium (Tb)

> 0.

Green phosphor activator, dopant, CRT, circuit boards

      
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