text: * An ingredient in diesel exhaust fluid (DEF), which is 32.5% urea and 67.5% de-ionized water. DEF is sprayed into the exhaust stream of diesel vehicles to break down dangerous  emissions into harmless nitrogen and water.
  * A component of animal feed, providing a relatively cheap source of nitrogen to promote growth
  * A non-corroding alternative to rock salt for road de-icing. It is often the main ingredient of pet friendly salt substitutes although it is less effective than traditional rock salt or calcium chloride.
  * A main ingredient in hair removers such as Nair and Veet
  * A browning agent in factory-produced pretzels
  * An ingredient in some skin cream, moisturizers, hair conditioners, and shampoos
  * A cloud seeding agent, along with other salts
  * A flame-proofing agent, commonly used in dry chemical fire extinguisher charges such as the urea-potassium bicarbonate mixture
  * An ingredient in many tooth whitening products
  * An ingredient in dish soap
  * Along with diammonium phosphate, as a yeast nutrient, for fermentation of sugars into ethanol
  * A nutrient used by plankton in ocean nourishment experiments for geoengineering purposes
  * As an additive to extend the working temperature and open time of hide glue
  * As a solubility-enhancing and moisture-retaining additive to dye baths for textile dyeing or printing
  * As an optical parametric oscillator in nonlinear optics