Sulfochromic acid

CAUTION – Chromic Acid is a toxic and corrosive solvent and is a known
carcinogen(1).Do not allow the solution to come into contact with you or
your clothing, for it will cause very bad burns. Protective gloves and safety
glasses are required when handling chromic acid. If any is spilled on the
floor or desk, neutralize it immediately with commercial-grade sodium
bicarbonate (baking soda) then wash completely with water .If it is spilled
on the skin, wash in running water immediately. The solution may be
repeatedly used until the reddish color of dichromate has been replaced by
the green color of the chromic ion (2).In a small beaker, just cover the glass
sample containers with chromic acid cleaning solution. Allow to stand at
room temperature for 20 min. Decant the cleaning solution from the
mechanical parts and return the used chromic acid cleaning solution to its
storage bottle. Wash the sample containers at least six times with tap water
and finally with distilled water Dry the sample containers as described
above and store in a desiccator for future use