Acetic acid is an important chemical reagent used for many different purposes, mostly for cellulose acetate and polyvinyl acetate. These compounds are used in photographic film and wood glue, respectively. Other uses include making synthetic fibers and fabrics. Acetic acid is naturally found in vinegar, so it can also be utilized in the food industry. Finally, vinyl acetate can be used for some plastics. It is colorless and partially dissociates in solvent, which classifies the chemical as a "weak" acid. There is a strong and pungent odor that emits from this material, and it can be hazardous when in concentrated doses.