| Caffeic acid, phenethyl ester, [10,11-3H]- | MT 873 |
| Caffeine, [1-methyl-14C]- (1,3,7-Trimethylxanthine, [1-methyl-14C]-) | MC 378 |
| Caffeine, [8-14C]- (1,3,7-Trimethylxanthine, [8-14C]-) | MC 499 |
| Calcipotriol, [(cyclopropyl) methyl-14C]- | MC 2616 |
| Calcium carbonate, [14C]- Discontinued | MC 2038 |
| Camptothecin, [14-3H(N)]- | MT 1733 |
| Candesartan, [benzyl-14C]- | MC 2451 |
| Cannabidiol, [3H]- | MT 2154 |
| H4-Cannabidiol, [3H]- | MT 2155 |
| CAPE, [10,11-3H]- | MT 873 |
| Capecitabine, [pyrimidine 6-3H]- | MT 1874 |
| Capric acid, [1-14C]- | MC 1455 |
| Carbamazepine, [3H]- | MT 1972 |
| Carbamazepine, [14C]- | MC 2745 |
| N-Carbamyl-β-alanine, [carbamyl-14C]- | MC 2047 |
| N-Carbamyl-D,L-aspartic acid, [carbamyl-14C]- | MC 1425 |
| N-Carbamyl-L-aspartic acid, [carbamyl-14C]- | MC 414 |
| Carboethoxymethylenetriphenylphosphorane, [2-14C]- | MC 2101 |
| Carbon-13 Custom Synthesis | |
| Carboplatin, [cyclobutane-1-14C]- | MC 2631 |
| (-)-Carbovir | M 1872 |
| (-)-Carbovir, [8-3H]- | MT 826 |
| (-)-Carbovir-5'-triphosphate, tetraammonium salt | M 1867 |
| (-)-Carbovir-5'-triphosphate, [8-3H]- | MT 1846 |
| 5-Carboxy-N-phenyl-2-(1H)-pyridone, [phenyl-14C(U)]- | MC 2389 |
| Carmustine, [chloroethyl-2-14C]- Discontinued | MC 1448 |
| Carnosic acid, [3H]- | MT 2188 |
| L-Carnitine hydrochloride, [N-methyl-14C]- | MC 1147 |
| D-Carnitine hydrochloride, [N-methyl-3H(N)]- Discontinued | MT 1540 |
| L-Carnosine, [3H]- | MT 994 |
| (-)-CBV-TP, [8-3H]- | MT 1846 |
| 2-CdAP, [8-3H]- | MT 1546 |
| Celecoxib, [methyl-3H]- | MT 1965 |
| Celiprolol, [3H]- | MT 2099 |
| Cellobiose, [3H]- | MT 1931 |
| Centanafadine HCl, [naphthyl-13C6]- | MG 156 |
| Centanafadine lactam, [naphthyl-13C6]- | MG 157 |
| CEP-32496, HCl [14C]- | MC 2724 |
| Ceramide III, [stearoyl-1-14C]- | MC 2668 |
| Cetyl alcohol, [1-3H]- | MT 1567 |
| Cetylpyridinium chloride, [pyridine-2-14C]- | MC 2174 |
| Chinomethionat, [quinoxaline-2,3-14C]- | MC 2294 |
| D-threo-Chloramphenicol, [dichloroacetyl-1-14C]- | MC 127 |
| D-threo-Chloramphenicol, [dichloroacetyl-1-14C]- | MC 127E |
| D-threo-Chloramphenicol, [dichloroacetyl-1,2-14C]- | MC 302 |
| D-threo-Chloramphenicol, [dichloroacetyl-1,2-14C]- | MC 302E |
| D-threo-Chloramphenicol, [dichloroacetyl-1,2-14C]- | MC 302EH |
| D-threo-Chloramphenicol, [dichloroacetyl-1,2-14C]- | MC 302H |
| Chlordecone, [14C(U)]- | MC 2322 |
| Chlorethoxyfos, [ethyl-14C]- | MC 2518 |
| Chlormequat chloride, [ethyl-1-14C]- | MC 2638 |
| Chloroacetic acid, [1-14C]- | MC 1263 |
| Chloroacetic acid, [2-14C]- | MC 1264 |
| Chloroacetylchloride, [1-14C]- | MC 2264 |
| 2-Chloroadenosine, [8-14C]- | MC 198 |
| 2-Chloroadenosine, [8-3H]- | MT 697 |
| 8-Chloroadenosine, [2-3H]- | MT 830 |
| 8-Chloroadenosine 3',5'-cyclicphosphate, ammonium salt, [2-3H]- | MT 825 |
| 6-Chloro-2-aminopurine, [8-14C]- | MC2008 |
| 4-Chloroaniline hydrochloride, [14C(U)]- | MC 1266 |
| 2-Chlorobenzoic acid, [ring-14C(U)]- | MC 2068 |
| 3-Chlorobenzoic acid, [carbonyl-14C]- | MC 2501 |
| 3-Chlorobenzoic acid, [ring-14C(U)]- | MC 2225 |
| p-Chlorobenzoic acid, [carboxyl-14C]- | MC 470 |
| 1-(2-chlorobenzyl)-2-[1-(4-isobutylphenyl)ethyl]-1H-benzimidazole, [3H]- | MT 2048 |
| 3-Chloro-4-cyanopyridine, [cyano-14C]- | MC 2191 |
| 2-Chloro-2'-deoxyadenosine, [8-14C]- | MC 1418 |
| 2-Chloro 2'-deoxyadenosine, [8-3H]- | MT 739 |
| 2-Chloro 2'-deoxyadenosine 5'-monophosphate, [8-14C]- | MC 1429 |
| 2-Chloro 2'-deoxyadenosine 5'-monophosphate, [8-3H]- | MT 1546 |
| 5'-Chloro 5'-deoxyadenosine, [8-14C]- | MC 479 |
| 2-Chloro-4,5-difluorobenzoic acid, [carboxy-14C]- | MC 2275 |
| 1-Chloro-2,4-dinitrobenzene, [14C(U)]- | MC 2466 |
| Chloroethylnitrosourea, [chloroethyl-1,2-3H]- | MT 1644 |
| 2-Chloroethyltrimethylammonium chloride, [ethyl-2-14C]- | MC 2382 |
| 6-Chloroguanine, [8-14C]- | MC 2008 |
| 2-Chloro-4-hydroxybenzaldehyde, [carbonyl-14C]- | MC 2764 |
| 6-Chloroinosine | M 1796 |
| Chloromethyl acetate, [chloromethyl-14C]- | MC 1413 |
| Chloromethyl benzoate, [7-14C]- | MC 1421 |
| 4-Chloro-2-methylphenoxy acetic acid, [phenyl-14C(U)]- | MC 2515 |
| 2-Chloro-4-methylsulfonylbenzoic acid, [ring-14C]- | MC 2079 |
| [3-(2-Chloro-4-methylsulfonylbenzoyl)-4-phenylthio]bicyclo[3.2.1]oct-3-en-2-one, [bicyclooctane ring-2,4-14C]- | MC 2524 |
| [3-(2-Chloro-4-methylsulfonylbenzoyl)-4-phenylthio]bicyclo[3.2.1]oct-3-en-2-one, [chlorophenyl-14C(U)]- | MC 2523 |
| 2-Chloro-4-methylthiazole, [4-14C]- | MC 2467 |
| Chloroneb, [ring-14C(U)]- | MC 2407 |
| 2-Chloronicotinic acid, [2-14C]- | MC 2365 |
| (±)-Chlorophenamine maleate, [3H]- | MT 1989 |
| 4-Chlorophenol, [14C(U)]- | MC 2123 |
| 5-Chloro-3-phenylsulfonylindole-2-carboxamide, [phenyl sulfone ring-14C(U)]- | MC 2361 |
| Chloropromazine, [3H]- | MT 2013 |
| 2-Chloropropanol, [1,2-14C]- | MC 2258 |
| 2-Chloropropionic acid, [1-14C]- | MC 298 |
| 6-Chloropurine | M 1895 |
| 6-Chloropurine, [8-14C]- | MC 2163 |
| 6-Chloropurine riboside | M 1796 |
| Chloroquine, diphosphate salt, [side chain N,N'-dimethyl pentanediamine-3H(N)]- | MT 1885 |
| Chlorosodiumphenolate, [7-14C]- | MC 1405 |
| Chlorothalonil, [14C(U)]- | MC 1137 |
| Chlorpropham, [ring-14C(U)]- | MC 2446 |
| Chlorpyrifos, [pyridine-2,6-14C]- | MC 2591 |
| Chlorthalidone, [phthalimidine-5,6-3H]- | MT 2084 |
| Chlortoluron, [phenyl-14C(U)]- | MC 2547 |
| Cholestenone, [4-14C]- | MC 2152 |
| Cholestenone oxime, [4-14C]- | MC 2154 |
| Cholesterol, [1,2-3H(N)]- | MT 912 |
| Cholesterol, [7-3H(N)]- | MT 872 |
| Cholesteryl arachidonate, [arachidonate-5,6,8,9,11,12,14,15-3H]- | MT 1533 |
| cHPMPC, [3H]- | MT 1713 |
| Ciclopirox, [3H]- | MT 1971 |
| Cidofovir | M 833 |
| Cidofovir, [2-14C]- | MC 446 |
| Cidofovir, [5-3H]- | MT 833 |
| Cimetidine, [imidazole-2-14C]- | MC 2493 |
| Ciprofloxacin | M 1737 |
| Ciprofloxacin, [2-14C]- | MC 1409 |
| Ciprofloxacin, HCl, [3H]- | MT 2069 |
| Cisapride, [3H]- | MT 1767 |
| Citric acid, [1,5-14C]- | MC 365 |
| Citronellol, [1-14C]- | MC 2621 |
| Cladribine | |
| Cladribine, [8-14C]- | MC 1418 |
| Cladribine, [8-3H]- | MT 739 |
| Cladribine 5'-monophosphate, [8-14C]- | MC 1429 |
| Cladribine 5'-monophosphate, [8-3H]- | MT 1546 |
| Clarithromycin, [6-O-methyl-14C]- | MC 2295 |
| Clarithromycin, [methyl-3H]- | MT 1719 |
| Clenbuterol, [3H]- | MT 1616 |
| Clevudine | M 1885 |
| Clevudine, [2-13C-1,3-15N2, 99 atom % 13C, 99 atom % 15N2]- ; (L-FMAU) | MG 118 |
| Clevudine, [5'-3H]- | MT 1726 |
| Clevudine 5'-triphosphate, tetraammonium salt | M 1919 |
| Clindamycin hydrochloride, [3H]- | MT 913 |
| Clindamycin phosphate, [3H]- | MT 1904 |
| Clobetasol-17-propionate, [3H]- | MT 1905 |
| Clofarabine, [2-chloroadenine-8-14C]- | MC 2223 |
| Clofarabine, [2-chloroadenine-8-3H]- (2-Chloro-2'-deoxy-2'-fluoroarabinosyl adenine, [2-chloroadenine-8-3H]-) | MT 1888 |
| Clofarabine, [13C5]- | MG 160 |
| Clofentezine, [phenyl rings-14C(U)]- | MC 2579 |
| Clofentezine, [tetrazine-14C(U)]- | MC 2582 |
| Clomazone, [chlorobenzene-14C(U)]- | MC 2548 |
| Clomazone, [oxazolidin-14C]- | MC 2396 |
| Clopidogrel, [carbonyl-14C]- | MC 2491 |
| Clopidogrel, [3H]- | MC 2033 |
| Clotrimazole, [3H]- | MT 1519 |
| Clozapine, [chlorophenyl-14C(U)]- | MC 2318 |
| Clozapine, [chlorophenyl-13C6]- | MG 141 |
| CMIT, [4,5-14C]- | MC 2357 |
| Cobicistat, [methyl-14C]- | MC 2765 |
| Cocarboxylase, [3H]- | MT 1697 |
| COgen, [14C]- (solid precursor) | MC 2424 |
| Coniferan, [acetate-1-14C]- | MC 2545 |
| Conjugated linoleic acid, [linoleic acid-1-14C]- (CLA, [linoleic acid-1-14C]-) | MC 2323 |
| Copper cyanide, [14C]- | MC 2282 |
| Cordycepin, [3H]- | MT 716 |
| Coronalon, [3H]- | MT 1906 |
| Creatine hydrate, [4-14C]- | MC 204 |
| Creatinine hydrochloride, [2-14C]- | MC 212 |
| Creatinine hydrochloride, [2-14C]- | MC 212H |
| Creatine phosphoric acid, [4-14C]- | MC 237 |
| o-Cresol, [ring-14C(U)]- | MC 2327 |
| Crizotinib, [3H]- | MT 2072 |
| 15-crown-5, [14C(U)]- | MC 2812 |
| Curcumin, [14C]- | MC 2725 |
| Cyanamide, barium salt, [14C]- | MC 224 |
| Cyanoacetic acid, [2-14C]- | MC 1269 |
| Cyanoacetic acid, [cyano-14C]- | MC 225 |
| Cyanoacetic acid, [14C(U)]- | MC 2087 |
| 4-Cyanobenzoic acid, [cyano-14C]- | MC 1216 |
| 4-Cyanobenzoic acid, [ring-14C]- | MC 1417 |
| 4-Cyanobenzylbromide, [cyano-14C]- | MC 1412 |
| Cyanocobalamin, [3H]- | MT 1953 |
| Cyanoguanidine, [14C(U)]- | MC 1484 |
| 3-Cyano-4-hydroxybenzoic acid, [14C]- | MC 2696 |
| N-(Cyanomethyl)-4-(2-((4-morpholinophenyl)amino)pyrimidin-4-yl)benzamide, [pyrimidine-2-14C]- | MC 2782 |
| 3-Cyanopyridine, [cyano-14C]- | MC 2081 |
| Cyanuric acid, [2,4,6-14C]- | MC 418 |
| Cyanuric chloride, [14C(U)]- | MC 1272 |
| Cyazofamid, [benzene-14C(U)]- | MC 2662 |
| Cyazofamid, [imidazole-4-14C]- | MC 2661 |
| 2',3'-cyclic-di-GAMP, diammonium salt, [3H]- | MT 1992 |
| 2',3'-cyclic-di-GAMP, diammonium salt, [adenine-8, guanine-8-3H]- | MT 2075 |
| Cyclocreatine, [2-14C]- | MC 2557 |
| Cyclohexanecarboxylic acid, [carboxy-14C]- | MC 2108 |
| cis-1,2-Cyclohexanedicarboxylic acid, diisononyl ester, [ring-14C(U)]- | MC 2485 |
| N6-Cyclohexyladenosine, [2,8-3H]- | MT 746 |
| Cyclopamine, [3H]- | MT 1968 |
| Cyclopentyl alcohol, [1-14C]- | MC 1404 |
| Cyclopropane carboxylic acid, [carboxyl-14C]- | MC 2261 |
| 5'-(N-Cyclopropyl)-carboxamidoadenosine, [2,8-3H]- | MT 559 |
| 3-(4-Cyclopropyl-6-methyl-pyrimidine-2-yl-amino)-phenol, [pyrimidine-2-14C]- | MC 2387 |
| Cyclosporin A, [3H]- | MT 1961 |
| p-Cymene, [1-methyl-14C]- | MC 2468 |
| Cyproconazole, [methyl-14C]- | MC 1407 |
| D-Cysteine, [1-14C]- | MC 2363 |
| D,L-Cysteine, [2-14C]- | MC 2675 |
| L-Cysteine, [1-14C]- Discontinued | MC 2362 |
| L-Cysteine, [35S]- Discontinued | MS 101 |
| Cytarabine, [2-14C]- | MC 109 |
| Cytarabine, [5-3H(N)]- | MT 631 |
| β-L-Cytidine | M 320 |
| β-L-Cytidine, [3H]- | MT 1692 |
| Cytidine, [14C(U)]- | MC 142 |
| Cytidine, [cytosine-14C(U)]- | MC 2014 |
| Cytidine, [2-14C]- | MC 128 |
| Cytidine, [5-3H(N)]- | MT 615 |
| Cytidine, [6-3H]- | MT 1966 |
| Cytidine 3',5'-cyclic phosphate, ammonium salt, [5,6-3H]- | MT 595 |
| Cytidine 5'-diphosphate, triammonium salt, [2-14C]- | MC 480 |
| Cytidine 5'-diphosphate, triammonium salt, [cytosine-14C(U)]- Discontinued | MC 480U |
| Cytidine 5'-diphosphate, triammonium salt, [cytosine-14C(U)]- Discontinued | MC 480UL |
| Cytidine 5'-diphosphocholine, disodium salt, [5-3H]- | MT 1609 |
| Cytidine 5'-monophosphate, diammonium salt, [cytosine-14C(U)]- | MC 2016 |
| Cytidine 5'-monophosphate, diammonium salt, [cytosine-14C(U)]- | MC 2016L |
| Cytidine 5'-monophosphate, diammonium salt, [14C(U)]- | MC 1486 |
| Cytidine 5'-monophosphate, diammonium salt, [2-14C]- | MC 1379 |
| Cytidine 5'-monophosphate, diammonium salt, [5-3H]- | MT 762 |
| Cytidine 5'-triphosphate, tetraammonium salt, [2-14C]- | MC 1431 |
| Cytidine 5'-triphosphate, tetraammonium salt, [5-3H]- | MT 849 |
| Cytochalasin B, [3H]- | MT 1923 |
| Cytochalasin B, [4-3H(N)]- Discontinued | MT 554 |
| Cytosine, [2-13C-1,3-15N2, 99 atom % 13C, 99 atom % 15N2]- | MG 121 |
| Cytosine, [14C(U)]- | MC 2013 |
| Cytosine, [2-14C]- | MC 131 |
| Cytosine, [5-3H]- | MT 642 |
| Cytosine, [6-3H]- | MT 814 |
| Cytosine-β-D-arabinofuranoside, [2-14C]- | MC 109 |
| Cytosine-β-D-arabinofuranoside, [5-3H(N)]- | MT 631 |
| Cytosine arabinofuranoside hydrochloride | M 1897 |
| Cytosine-β-D-arabinofuranoside 5'-monophosphate, diammonium salt | M 1145 |
| Cytosine-β-D-arabinofuranoside 5'-monophosphate, ditriethylammonium salt, [2-14C]- | MC 1145 |
| Cytosine dioxolane, [3H]- | MT 1689 |