The Consumer Protection Law specifies general characteristics that a product must have, including that the label must be in Spanish; retailers must display the price of the product either on the packaging or in a visible place; products that are sold by weight or volume, or any other measure, must have the weight, volume, or exact measurement of the contents on the label; and expiration date.

There are labeling requirements for specific products, such as pharmaceuticals, cosmetics, hygiene, textiles, food, processed food, and beverages (alcoholic and non-alcoholic). For example, as established by the National Medicine Directorate (DNM), the label of pharmaceutical products must provide the trade name of the product; active ingredient; concentration of active ingredient; instructions for use, possible side effects; warnings; dose; manufacturing and expiration dates; formula; manufacturing lot number; and Health Registry Number.

All Salvadoran and Central American Technical Regulations related to labeling are available at the Salvadoran Technical Regulation Organism (OSARTEC).