The material selection platform
Cosmetics Ingredients
The material selection platform
Cosmetics Ingredients


CAS Number 532-32-1
Chem/IUPAC Name: Sodium benzoate
EINECS/ELINCS No: 208-534-8
COSING REF No: 37735
Sodium Benzoate is a commonly used preservative in cosmetics and personal care products. It is the sodium salt of benzoic acid, a naturally occurring substance found in fruits like cranberries, plums, and apples. Sodium benzoate appears as a white, odorless crystalline powder or granules. Due to its antimicrobial properties, it helps prevent the growth of bacteria, fungi, and yeast, thus extending the shelf life of cosmetic products. Its natural origin and effectiveness in preservation make sodium benzoate a popular choice in various personal care products like lotions, creams, shampoos, and makeup items, ensuring their safety and longevity. The chemical formula of Sodium Benzoate is C7H5NaO2.

What is SODIUM BENZOATE used for?

Sodium Benzoate is a very useful ingredient for preserving cosmetics and personal care products. It helps in enhancing the shelf life of various formulations.
  • Skin care: It is often found in skin care products like creams, lotions, and cleansers. Having antimicrobial properties, it prevents the growth of harmful bacteria and fungi, ensuring product safety and longevity
  • Cosmetics products: It serves as a valuable preservative in makeup items such as foundations, eyeshadows, and lipsticks. It helps maintain the product's quality, preventing microbial contamination and maintaining its shelf life
  • Hair care: It assists in preserving the integrity of hair care formulations, preventing microbial growth, and maintaining their efficacy over time. This ingredient ensures that the products remain fresh and effective for long


Sodium benzoate is produced by the reaction of benzoic acid with sodium hydroxide. Benzoic acid is first dissolved in water, and then sodium hydroxide is added to form sodium benzoate and water. The resulting sodium benzoate is typically isolated through filtration or crystallization processes.

What does SODIUM BENZOATE do in a formulation?

  • Antimicrobial
  • Preservative

Safety profile

Sodium Benzoate is a safe ingredient when used within approved concentrations. It has been extensively studied and approved by regulatory bodies worldwide. However, a patch test is recommended. Sodium Benzoate is generally recognized as vegan since it is derived from a chemical reaction and not from animal sources. Additionally, sodium benzoate is also halal.

Technical profile

Property Values
Boiling Point 249.3°C
Melting Point 410°C
pH 2.5-4.0
Solubility Soluble in water
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