As a low-irritation preservative and PH adjuster, sodium benzoate is used in personal care, cleaning products and cosmetics, as detailed below:

I. Cosmetics / Skincare Products

• Product Types: Toners, lotions, creams, serums, sunscreens, color cosmetics (e.g., lipsticks, liquid foundations).
• Core Functions: Inhibits the growth of bacteria, molds, and other microorganisms; prevents product oxidation and spoilage; extends shelf life.
• Characteristics: Excellent water solubility; compatible with most skincare ingredients; exhibits relatively low skin irritation at appropriate concentrations, making it suitable for sensitive skin products (when combined with soothing agents).

II. Personal Care & Cleaning Products

Hair Care: Shampoos, conditioners, hair masks, hair dyes/perming products.

Function: Besides preservation, it helps adjust product pH (to suit the scalp/hair environment) and can improve foam density.

Body Cleansing: Body washes, liquid soaps, wet wipes (including baby wipes), feminine intimate washes.

Function: Inhibits microbial growth while enhancing the stability of cleansing formulations.

Oral Care: Toothpaste, mouthwash.

Function: Inhibits harmful oral bacteria (e.g., cariogenic bacteria), improves product pH to reduce enamel irritation, and aids preservation.

III. Household & Industrial Cleaning Products

Detergents: Laundry liquids, dishwashing liquids, fabric softeners.

Function: Acts as a preservative to prevent microbial contamination that can cause odor and phase separation; may also assist in boosting cleaning efficacy.