Category:
Other Fine Chemicals
CAS NO:
NA
Standard:
In-house Standards,
Cholecalciferol EP Impurity D, chemically known as iso-Tachysterol 3, is a photo-degradation byproduct formed during the synthesis of Vitamin D3. Its molecular formula is C27H44O, and it carries CAS number 10689-54-2. This compound serves as a critical reference standard for identifying and quantifying impurities in pharmaceutical grade cholecalciferol.
Store strictly under inert atmosphere at temperatures below -20°C to prevent further degradation. Use appropriate PPE including nitrile gloves and safety goggles; avoid inhalation or skin contact due to potential irritancy. Do not use for clinical administration as it lacks therapeutic efficacy and may pose toxicity risks.