How to Make a Chromic Acid Cleaning Solution

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Things You'll Need

  • Glass pan

  • Liter glass beaker

  • Rubber gloves

  • 20 g powdered sodium dichromate

  • Water

  • Glass stirring rod

  • 300 ml concentrated sulfuric acid

  • Glass-stoppered bottle

Warning

Chromic acid is extremely corrosive. Always use glass containers when making and storing chromic acid solution.

Chromic acid is highly acidic. Always handle it with caution to prevent skin burns.

Chromic acid is not a popular cleaning solution, because chromium is classified as a carcinogen. It is still used occasionally despite the careful handling that it requires because it is effective at removing cloudy stains from glass that no other cleaner does. Using extreme caution, it is possible to make a chromic acid cleaning solution at home. The ingredients aren't available at your local supermarket, but you can purchase them online.

Step 1

Place a clean, glass liter beaker in a glass pan to prevent damage from accidental spills.

Step 2

Wearing rubber gloves, put 20 g of powdered sodium dichromate into the liter glass beaker.

Step 3

Mix in a small amount of water to form a paste, and stir thoroughly with a glass stirring rod.

Step 4

Continue to stir the mixture while slowly adding 300 ml of concentrated sulfuric acid to the beaker.

Step 5

Carefully pour the solution from the beaker into a glass bottle with a stopper on top.

references & resources

Elizabeth Grace

Based in Grand Rapids, Michigan, Elizabeth Grace is a freelance writer. She holds a Bachelor of Arts in public relations from Pepperdine University, and has 15 years of experience developing marketing campaigns for universities and multinational corporations.