In which year did Louis Pasteur report his foundational work separating mirror-image tartrate crystals, helping establish modern stereochemistry?

Explanation

In 1848, Louis Pasteur reported his work separating mirror-image tartrate crystals and relating their forms to opposite optical rotations. It became foundational work in stereochemistry. Chirality means that an object or molecule cannot be superposed on its mirror image; the term itself was introduced later.