### Question
How is the term chemical preservative defined?


### Answer
The term **chemical preservative** is defined in *21 CFR § 101.13* as the following:

> any chemical that, when added to food, tends to prevent or retard deterioration thereof, but does not include common salt, sugars, vinegars, spices, or oils extracted from spices, substances added to food by direct exposure thereof to wood smoke, or chemicals applied for their insecticidal or herbicidal properties.

#### Citation:
  - *21 CFR § 101.13*
