Sigma-Aldrich
Replacement sensor for Plas-Labs digital oxygen analyzer, model 800-DOI
Rhodium
Roses metal alloy, Bi50Pb28Sn22
Round-bottom flask for Aldrich® student glass kit
Ruminant pDNA calibrant
S-[2-(dimethylamino)ethyl] diphenylthiocarbamate
S-(4-HYDROXYPHENYL) N-(2-CHLORO-4-NITROPHENYL)THIOCARBAMATE
S-(4-METHOXYPHENYL) N-(2,5-DIMETHOXYPHENYL)THIOCARBAMATE
S-(Hydroxymethyl) benzenecarbothioate
S-(P-TOLYL) 4-NITROTHIOLBENZOATE