(3)-Allopregnanolone Sulfate Sodium Salt

(3)-Allopregnanolone sulfate sodium salt is a sulfated derivative of the neurosteroid allopregnanolone, featuring a 5α-pregnan-3α-ol core with a sulfate ester at the C3 position and sodium counterions. The 3β-hydroxyl group of the parent compound is converted to a sulfonic ester, introducing a negatively charged sulfonate moiety stabilized by sodium cations. This impurity arises during synthetic processes involving allopregnanolone, particularly under acidic or oxidative conditions, and serves as a critical HPLC reference standard for quantifying sulfation byproducts in pharmaceutical development.