H2Cr2O7, known as dichromic acid, is a chemical compound composed of chromium, oxygen, and hydrogen. It is often encountered in its salt form, sodium dichromate, which is used in various industrial applications, including dyeing and tanning. The compound is characterized by its bright orange color and strong oxidizing properties. Dichromic acid is typically produced by dissolving chromium trioxide in water. It is important to handle this compound with care, as it is toxic and can be harmful to the environment. Its use is regulated in many countries due to its potential health risks.