Our ribonucleoside triphosphates are suitable for use in in vitro-transcription and siRNA synthesis for RNAi studies. Offered in a convenient 100 nM concentration, individual Ribonucleoside Triphosphates are greater than 95% pure. Each Ribonucleoside Triphosphate is formulated in an aqueous lithium salt pH 7.0 solution and is ready for use following dilution with the appropriate buffer.