Other industrial applications:

• Ascorbic acid acts as a preservative and reductant during photographic development.
• Swimming pool companies use ascorbic acid to remove dissolved metal stains, namely iron, from the sides of pools. Because it is an acid, it has the ability to lower the pH of pool water and stabilize the other chemicals.
• Iodine is another metal that ascorbic acid negates, so it is routinely added to water purification systems to remove the taste, smell, and colour of iodine in sterilized water.
• Ascorbic acid catalyses the assembly of molecular chains in plastic manufacturing.
• Recent pharmaceutical trials of topical ascorbic acid have proved it reduces the appearance of fine lines and age spots significantly.