| GABA, [1-14C]- | MC 1241 |
| GABA, [4-14C]- | MC 2145 |
| GABA, [2,3-3H(N)]- | MT 897 |
| Galactocerebroside, [galactose-6-3H]- | MT 1947 |
| D-Galactose, [1-14C]- | MC 1461 |
| D-Galactose, [6-3H(N)]- | MT 805 |
| β-Galactosidase, [methyl-14C]- Discontinued | MC 1471 |
| Ganciclovir, [8-14C]- | MC 1392 |
| Ganciclovir, [8-3H]- | MT 725 |
| Ganciclovir sodium standard | M 725 |
| Gefitinib, [3H]- | MT 1979 |
| Gemcitabine, [cytosine-2-13C-1,3-15N2, 99 atom % 13C, 99 atom % 15N2]- | MG 119 |
| Gemcitabine, [cytosine-2-14C]- | MC 2246 |
| Gemcitabine, [cytosine-5-3H(N)]- | MT 1572 |
| Gemcitabine elaidate, [cytosine-2-14C]- | MC 2686 |
| Gemcitabine monophosphate, ammonium salt, [5-3H(N)]- | MT 2047 |
| Gemfibrozil, [carboxyl-14C]- | MC 455 |
| Genistein, [4-14C]- | MC 453 |
| Geraniol, [2-14C]- | MC 2432 |
| all trans-Geranyl geraniol, [1-3H]- | MT 1633 |
| Glipizide, [3H]- | MT 1855 |
| Methyl α-D-glucopyranoside, [glucose-14C(U)]- | MC 2763 |
| D-Glucosamine hydrochloride, [14C(U)]- Discontinued | MC 403 |
| D-Glucosamine hydrochloride, [1-14C]- | MC 320 |
| D-Glucosamine hydrochloride, [1-14C]- | MC 320W |
| D-Glucosamine hydrochloride, [6-3H]- | MT 551 |
| D-Glucose, [14C(U)]- | MC 144 |
| D-Glucose, [14C(U)]- | MC 144W |
| D-Glucose, [1-14C]- | MC 228 |
| D-Glucose, [1-14C]- | MC 228W |
| D-Glucose, [1-3H(N)]- | MT 549 |
| D-Glucose, [2-3H(N)]- | MT 555 |
| D-Glucose, [2-3H(N)]- | MT 555M |
| D-Glucose, [2-3H(N)]- | MT 555W |
| D-Glucose, [3-3H]- | MT 914 |
| D-Glucose, [6-3H(N)]- Discontinued | MT 866 |
| L-Glucose, [1-14C]- Discontinued | MC 1114 |
| L-Glucose, [1-3H]- | MT 548 |
| L-Glucose, [1-3H]- | MT 548W |
| alpha-D-Glucose-1-phosphate, [14C(U)]- | MC 146 |
| D-Glucose-6-phosphate, [14C(U)]- | MC 149 |
| D-Glufosinate ammonium salt | M 1948 |
| L-Glufosinate ammonium salt | M 1947 |
| (RS)-Glufosinate ammonia, [3,4-14C]- | MC 2606 |
| L-Glutamic acid, [14C(U)]- | MC 156 |
| DL-Glutamic acid, [1-14C]- Discontinued | MC 390 |
| D-Glutamic acid, [3H]- | MT 1577 |
| L-Glutamic acid, [3,4-3H]- | MT 855 |
| L-Glutamine, [14C(U)]- | MC 1124 |
| L-Glutamine, [3,4-3H(N)]- | MT 1671 |
| Glutaraldehyde, [1,5-14C]- | MC 1363 |
| Glyceraldehyde, [1-14C]- | MC 1432 |
| Glycerol, [14C(U)]- Discontinued | MC 405 |
| Glycine, [14C(U)]- | MC 163 |
| Glycine, [1-14C]- | MC 1109 |
| Glycine, [2-14C]- | MC 408 |
| Glycine, [2-3H]- | MT 885 |
| Glycine, [2-3H]- | MT 885A |
| Glycine, [2-3H]- | MT 885AL |
| Glycine, [2-3H]- | MT 885L |
| Glycine ethyl ester, [1,2-14C]- Discontinued | MC 1149 |
| Glycylalendronic acid, sodium salt, [alendronate-4-14C]- | MC 2133 |
| Glycyl-L-glutamine, [3H]- | MT 952 |
| Glycyl-DL-phenylalanine, [phenyl,4-3H]- | MT 878 |
| Glycylsarcosine, [glycyl-1,2-14C]- | MC 447 |
| Glycylsarcosine, [3H]- | MT 1545 |
| Glyphosate, [glycine-1-14C]- | MC 2463 |
| Grazoprevir, [3H]- | MT2126 |
| Guadecitabine, [triazine-4-14C]- | MC 2774 |
| Guaifenesin, [3H]- | MT 2106 |
| Guanidine hydrochloride, [14C]-......Solid | MC 145 |
| Guanidine hydrochloride, [14C]-......Aqueous solution | MC 145S |
| Guanidinoacetic acid, [1-14C]- | MC 1387 |
| Guanine hydrochloride, [8-14C]- | MC 162 |
| Guanine, [2-13C, 1,3,5-NH2-15N4]- | MG 144 |
| Guanine, [8-3H]- | MT 839 |
| Guanine-β-D-arabinofuranoside, [8-3H]- | MT 809 |
| β-L-2'-Guanosine | M 323 |
| Guanosine, [14C(U)]- Discontinued | MC 166 |
| Guanosine, [8-14C]- | MC 177 |
| Guanosine, [8-3H]- | MT 514 |
| β-L-Guanosine, [8-3H]- | MT 1693 |
| Guanosine 3',5'-cyclic phosphate, ammonium salt, [8-14C]- | MC 195 |
| Guanosine 3',5'-cyclic phosphate, ammonium salt, [8-3H]- | MT 517 |
| Guanosine 3',5'-cyclic phosphate, ammonium salt, [8-3H]- | MT 517L |
| Guanosine 5'-diphosphate, [8-14C]- | MC 311 |
| Guanosine 5'-monophosphate, diammonium salt, [14C(U)]- Discontinued | MC 1489 |
| Guanosine 5'-monophosphate, diammonium salt, [8-14C]- | MC 196 |
| Guanosine 5'-monophosphate, diammonium salt, [8-3H]- | MT 501 |
| Guanosine 5'-triphosphate, tetraammonium salt, [8-14C]- | MC 194 |