Versatile reaction vial for protein hydrolosys and derivatization. It features a PTFE cap with a CTFE screw-type on-off valve. The PTFE flap that makes the cap-to-vial seal is backed up by a Viton o-ring to prevent leaks that could occur through "cold flow" of the PTFE. Vial holds twelve 6 x 50mm sample tubes.
Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements.