CAS Registry Number

CAS 7789-20-0 — Deuterium oxide 99.9%

Deuterium oxide (D2O), also called heavy water, is a stable isotope of water where hydrogen atoms are replaced with deuterium. It is primarily used in nuclear reactors as a neutron moderator, in NMR spectroscopy, and as a solvent in isotopic research. This ultra-pure 99.9% deuterium oxide has a CAS number of 7789-20-0, a molecular weight of 20.03, and requires ambient storage with no signal word warnings. Molekula supplies deuterium oxide 99.9% from research to bulk quantities with full documentation and ISO 9001:2015 traceability.