The isotopic purity for all isotopes is >98%.
Note: Silantes media are natural products. A slightly different color (e.g. amongst different batches) is absolutely normal for natural products and has nothing to do with the quality.
Silantes OD-Media are made from bacterial hydrolysate and contain primarily amino acids, some low MW oligopeptides and almost no carbohydrates. The bacterial strain used is a chemolithoautotrophic organism which grows on inorganic substrates that are isotopically labeled.
Ready to use: Each bottle of Silantes rich growth media is filter-sterilized and ready to use.