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Inhalation

The following is a listing of the USEPA’s dose conversion factors for inhalation of some commonly-encountered radionuclides. The values shown below are in units of “millirem per microcurie inhaled”, and may be used to convert estimates of intake into committed effective dose equivalent. Included as well is a notation showing the applicable lung clearance class (i.e., Y = years, W = weeks, and D = days).

Actinium

  • Ac-228 – 308.21 – D
  • Ac-228 – 91.02 – W
  • Ac-228 – 125.43 – Y

Americium

  • Am-241 – 444000 – W
  • Am-242m – 425500 – W

Barium

  • Ba-133 – 7.81 – D
  • Ba-133m – 0.62 – D
  • Ba-140 – 3.74 – D

Beryllium

  • Be-7 – 0.236 – W
  • Be-7 – 0.321 – Y

Bismuth

  • Bi-210 – 15.47 – D
  • Bi-210 – 195.73 – W
  • Bi-210m – 832.50 – D
  • Bi-210m – 7585 – W
  • Bi-212 – 21.57 – D
  • Bi-212 – 19.13 – W
  • Bi-214 – 6.59 – D
  • Bi-214 – 6.22 – W

Cadmium

  • Cd-107 – 0.10 – D
  • Cd-107 – 0.10 – W
  • Cd-107 – 0.11 – Y
  • Cd-109 – 114.33 – D
  • Cd-109 – 39.59 – W
  • Cd-109 – 45.14 – Y

Californium

  • Cf-250 – 261960 – W
  • Cf-250 – 206090 – Y
  • Cf-252 – 136900 – W
  • Cf-252 – 156880 – Y

Carbon

  • C-14 – 2.09 – Labeled organic compounds
  • C-14 – 0.0029 – Carbon monoxide
  • C-14 – 0.0235 – Carbon dioxide

Cerium

  • Ce-134 – 7.88 – W
  • Ce-134 – 8.18 – Y
  • Ce-135 – 1.47 – W
  • Ce-135 – 1.59 – Y

Cesium

  • Cs-134 – 46.25 – D
  • Cs-134m – 0.04 – D
  • Cs-136 – 7.33 – D
  • Cs-137 – 31.93 – D

Chromium

  • Cr-51 – 0.26 – W
  • Cr-51 – 0.33 – Y

Cobalt

  • Co-55 – 1.89 – W
  • Co-55 – 2.09 – Y
  • Co-56 – 22.35 – W
  • Co-56 – 39.59 – Y
  • Co-57 – 2.63 – W
  • Co-57 – 9.07 – Y
  • Co-58 – 6.36 – W
  • Co-58 – 10.88 – Y
  • Co-60 – 33.08 – W
  • Co-60 – 218.67 – Y

Copper

  • Cu-64 – 0.20 – D
  • Cu-64 – 0.26 – W
  • Cu-64 – 0.28 – Y
  • Cu-67 – 0.68 – D
  • Cu-67 – 1.17 – W

Curium

  • Cm-240 – 8029 – W
  • Cm-241 – 146.89 – W
  • Cm-242 – 17279 – W
  • Cm-244 – 247900 – W

Gold

  • Au-198 – 1.43 – D
  • Au-198 – 3.03 – W
  • Au-198 – 3.28 – Y
  • Au-198m – 1.88 – D
  • Au-198m – 4.48 – W
  • Au-198m – 4.85 – Y
  • Au-199 – 0.61 – D
  • Au-199 – 1.39 – W
  • Au-199 – 1.50 – Y

Hydrogen

  • H-3 – 0.064 – Vapor

Indium

  • In-109 – 0.12 – D
  • In-109 – 0.08 – W
  • In-110 – 0.31 – D

Iodine

  • I-125 – 24.16 – D
  • I-126 – 44.40 – D
  • I-128 – 0.05 – D
  • I-129 – 173.53 – D
  • I-130 – 2.64 – D
  • I-131 – 32.89 – D

Iridium

  • Ir-190 – 5.51 – D
  • Ir-190 – 6.10 – W
  • Ir-190 – 6.40 – Y
  • Ir-190m – 0.03 – D
  • Ir-190m – 0.03 – W
  • Ir-190m – 0.03 – Y
  • Ir-192 – 18.87 – D
  • Ir-192 – 18.06 – W
  • Ir-192 – 28.16 – Y
  • Ir-194 – 1.77 – D
  • Ir-194 – 2.64 – W
  • Ir-194 – 2.90 – Y
  • Ir-195 – 0.14 – D
  • Ir-195 – 0.13 – W
  • Ir-195 – 0.14 – Y
  • Ir-195m – 0.24 – D
  • Ir-195m – 0.23 – W
  • Ir-195m – 0.25 – Y

Iron

  • Fe-55 – 2.69 – D
  • Fe-55 – 1.34 – W
  • Fe-59 – 14.8 – D
  • Fe-59 – 12.2 – W

Lead

  • Pb-209 – 0.09 – D
  • Pb-210 – 13579 – D
  • Pb-211 – 8.70 – D
  • Pb-212 – 168.72 – D
  • Pb-214 – 7.81 – D

Manganese

  • Mn-54 – 5.25 – D
  • Mn-54 – 6.7 – W

Molybdenum

  • Mo-99 – 2.01 – D
  • Mo-99 – 3.96 – Y

Nickel

  • Ni-63 – 3.10 – D
  • Ni-63 – 2.30 – W
  • Ni-65 – 0.24 – D
  • Ni-65 – 0.22 – W
  • Ni-66 – 3.51 – D
  • Ni-66 – 8.32 – W

Osmium

  • Os-180 – 0.02 – D
  • Os-180 – 0.01 – W
  • Os-180 – 0.01 – Y
  • Os-181 – 0.12 – D
  • Os-181 – 0.12 – W
  • Os-181 – 0.13 – Y
  • Os-185 – 10.36 – D
  • Os-185 – 6.51 – W
  • Os-185 – 9.92 – Y

Phosphorus

  • P-32 – 6.07 – D
  • P-32 – 15.5 – W
  • P-33 – 0.633 – D
  • P-33 – 2.32 – W

Plutonium

  • Pu-238 – 392200 – W
  • Pu-238 – 288230 – Y
  • Pu-239 – 429200 – W
  • Pu-239 – 308210 – Y
  • Pu-240 – 429200 – W
  • Pu-240 – 308210 – Y
  • Pu-241 – 8251 – W
  • Pu-241 – 4958 – Y

Polonium

  • Po-210 – 9398 – D
  • Po-210 – 8584 – W

Potassium

  • K-40 – 0.124 – D
  • K-42 – 1.36 – D
  • K43 – 0.692 – D

Protactinium

  • Pa-233 – 8.29 – W
  • Pa-233 – 9.55 – Y
  • Pa-234 – 0.73 – W
  • Pa-234 – 0.81 – Y

Radium

  • Ra-224 – 3156.10 – W
  • Ra-226 – 8584 – W
  • Ra-228 – 4773 – W

Rubidium

  • Rb-79 – 0.05 – D
  • Rb-81 – 0.13 – D
  • Rb-83 – 4.92 – D
  • Rb-84 – 6.51 – D
  • Rb-86 – 6.62 – D
  • Rb-87 – 3.23 – D
  • Rb-88 – 0.08 – D
  • Rb-89 – 0.04 – D

Silver

  • Ag-108m – 30.12 – D
  • Ag-108m – 25.31 – W
  • Ag-108m – 283.42 – Y
  • Ag-110m – 39.59 – D
  • Ag-110m – 30.86 – W
  • Ag-110m – 80.29 – Y

Sodium

  • Na-22 – 7.66 – D
  • Na-24 – 1.21 – D

Strontium

  • Sr-85 – 1.92 – D
  • Sr-85 – 5.03 – Y
  • Sr-89 – 6.51 – D
  • Sr-89 – 41.44 – Y
  • Sr-90 – 239.39 – D
  • Sr-90 – 1298.70 – Y
  • Sr-91 – 0.93 – D
  • Sr-91 – 1.66 – Y

Tantalum

  • Ta-182 – 21.76 – W
  • Ta-182 – 44.77 – Y
  • Ta-182m – 0.01 – W
  • Ta-182m – 0.01 – Y

Technetium

  • Tc-99 – 1.02 – D
  • Tc-99m – 0.03 – D
  • Tc-99m – 0.03 – W

Thallium

  • Tl-201 – 0.23 – D
  • Tl-202 – 0.98 – D
  • Tl-204 – 2.41 – D

Thorium

  • Th-228 – 249750 – W
  • Th-228 – 341510 – Y
  • Th-230 – 325600 – W
  • Th-230 – 261590 – Y
  • Th-232 – 1639100 – W
  • Th-232 – 1150700 – Y

Uranium

  • U-230 – 8584 – D
  • U-230 – 16132 – W
  • U-230 – 19462 – Y
  • U-232 – 12691 – D
  • U-232 – 14874 – W
  • U-232 – 658600 – Y
  • U-233 – 2786.10 – D
  • U-233 – 7992 – W
  • U-233 – 135420 – Y
  • U-234 – 2726.90 – D
  • U-234 – 7881 – W
  • U-234 – 132460 – Y
  • U-235 – 2534.50 – D
  • U-235 – 7289 – W
  • U-235 – 122840 – Y
  • U-238 – 2449.40 – D
  • U-238 – 7030 – W
  • U-238 – 118400 – Y

Yttrium

  • Y-90 – 7.88 – W
  • Y-90 – 8.44 – Y
  • Y-91 – 32.26 – W
  • Y-91 – 48.84 – Y

Zinc

  • Zn-65 – 20.39 – Y
  • Zn-72 – 5 – Y

Zirconium

  • Zr-93 – 320.79 – D
  • Zr-93 – 83.25 – W
  • Zr-93 – 74.00 – Y
  • Zr-95 – 23.64 – D
  • Zr-95 – 15.87 – W
  • Zr-95 – 23.35 – Y