Oolong Tea Extract (OTE) is a non-toxic and non-radioactive stain for electron microscopy. It is effective for fibrous connective tissues. OTE acts as a Tannin which allows complete post-stain lead citrate mordanting and gives satisfactory results. Powder is ideal for longer storage.
Small size (2ml), light-gauge, pre-scored amber glass ampoules. Ampoules containing OsO4 crystals are pre-cleaned and heat sealed in plastic bags to assure a contaminant-free solution.