Potassium Sorbate

• Effective against mold, yeast, and some bacteria
• Widely used in natural and clean beauty products
• Compatible with other preservatives (like sodium benzoate)
• Non-irritating and ECOCERT-approved
• Ideal for water-based skincare products

Potassium Sorbate is the potassium salt of sorbic acid — a widely used, gentle preservative in cosmetics and food. In personal care, it’s used to prevent microbial growth in water-containing formulas like lotions, creams, toners, and serums. It is especially effective against fungi and yeast, and is often paired with Sodium Benzoate or Phenoxyethanol to enhance antibacterial protection. Potassium Sorbate is ideal for formulators seeking a mild and eco-conscious preservative system.

INCI Name: Potassium Sorbate

CAS Number: 24634-61-5

Solubility: Water-soluble

Add Phase: Cool-down phase (below 45°C)

pH Stability: Most effective at pH 4.0 – 5.5

Processing Temperature: Use below 45°C

Appearance: White crystalline powder or granules

Odor: Odorless to mildly fruity

Molecular Weight: 150.22 g/mol

Flash Point: Non-flammable

Density: ~1.36 g/cm³

• Usage Rate: 0.1% – 0.5%
• Add during cool-down phase, dissolve in water
• Best used in pH-adjusted formulas (4.0–5.5)
• Combine with sodium benzoate or other preservatives for broader protection

🧪 For natural preservative systems, combine 0.2% Potassium Sorbate with 0.2% Sodium Benzoate and citric acid to adjust pH. Perfect for DIY toners and creams targeting a clean beauty market!

✔️ Safe for all skin types including sensitive, baby, and acne-prone skin

✔️ Non-sensitizing when used within recommended limits

1. Natural Face Toner

Use Potassium Sorbate and Sodium Benzoate to preserve a refreshing cucumber + rose water toner with niacinamide.

2. DIY Moisturizer for Sensitive Skin

Formulate a fragrance-free lotion with shea butter and panthenol, using Potassium Sorbate as a gentle preservative option.

3. Gel-Based Serum

Incorporate Potassium Sorbate into an aloe-based serum with hyaluronic acid and licorice extract for skin brightening and hydration.

4. After-Sun Soothing Spray

Preserve an after-sun mist containing cucumber extract, chamomile, and panthenol with 0.2% Potassium Sorbate for safety and freshness.

5. Natural Baby Cream

Blend shea butter, calendula oil, and oat extract into a light cream and use Potassium Sorbate to keep it gentle and safe for babies.

Q1: Is Potassium Sorbate enough as a standalone preservative?

A1: It offers good protection against mold and yeast, but it’s best combined with other preservatives for full-spectrum protection (e.g. sodium benzoate or phenoxyethanol).

Q2: Can it be used in natural or organic cosmetics?

A2: Yes, it's ECOCERT- and COSMOS-approved and widely used in natural/clean beauty products.

Q3: Does it affect product texture or scent?

A3: No, it is odorless and does not impact texture or viscosity when used correctly.

Q4: What pH is required for it to work effectively?

A4: It works best in formulas with a final pH between 4.0 and 5.5.

Q5: Is it safe for daily use?

A5: Yes, it is safe and non-sensitizing when used at the recommended levels.

Product evaluation

Review the specifications, supplied grade, intended use and compatibility of Potassium Sorbate before ordering for production. Test a small quantity in the actual application and document the result before scaling.

Quality control

Inspect the received batch for expected appearance, odor, texture, packaging condition and labeling. Keep supplier and batch records, use accurate measurements, and retain a reference sample when the material is used commercially.

Storage and responsible use

Store tightly closed in a clean, cool and dry location away from direct sunlight. Follow the current supplier instructions and all safety, labeling and regulatory requirements that apply to the intended finished product.