Description General description Vitamin D2 is also known as ergocalciferol. It is produced by plants and mushrooms when exposed to sunlight. Vitamin D2 (6,19,19-d3) is a deuterated vitamin D2 wherein C-6 and C-19 protons are replaced by deuterium. Application Vitamin D2 (6,19,19-d3) can be used as an analytical standard for the quantitative analysis of vitamin D2 concentration in human blood via LC-MS/MS. Packaging 1 mL in ampule