Sodium lactate

Sodium lactate (CAS 72-17-3), also designated E325, is the sodium salt of lactic acid supplied primarily as an aqueous solution.

Where is Sodium lactate used?

• Food: humectant, pH buffer and antimicrobial synergist in processed meats and ready-to-eat foods, extending shelf life by suppressing pathogen growth
• Bakery and confectionery: controls water activity and improves texture stability
• Pharmaceutical: pH buffering in parenteral fluids and topical preparations
• Personal care: humectant in moisturizers, lotions and scalp treatments, attracting and retaining moisture in the stratum corneum
• It is also used as a pH buffer and antimicrobial synergist in manufacturing.
• Compatible with various surfactants and cosmetic raw materials in water-based systems.
• Allows maintaining sensory properties despite a reduced sodium chloride content in reformulated cleaner label products.
• In beverages such as isotonic drinks, acts as an electrolyte and buffer substance for taste balance and stability.
• Can be combined with other humectants such as glycerin and propanediol.

Good to know: Food-grade material conforming to E325 specifications is the dominant commercial form; USP and BP grades are available for pharmaceutical applications.

Formulation notes

• Recommended usage rate is 0.5% to 4% depending on the formulation.

Typical specification

• pH range in 1% solution is 6.0–8.0.
• Sodium L-(+)-lactate solution 60% E325 (Food Grade) is available on the market.

Regulatory status

• There is no maximum level restriction (quantum satis) in the EU, except in certain categories such as infant formula, for which a general prohibition applies.
• On the World Health Organization's List of Essential Medicines, the safest and most effective medicines needed in a health system.

Storage, packaging and handling

• Should be stored in a well-closed container in a cool, dry place.

Frequently asked questions about Sodium lactate

Can sodium lactate be used in both hot and cold production processes?

Sodium lactate 60% can be used in both hot and cold production processes and disperses homogeneously in the mixture due to its high water solubility.

What is the chloride content of sodium lactate?

Sodium lactate has a chloride content of ≤ 0.05%.

How does sodium lactate function in meat and poultry products?

It is used in meat and poultry products to improve water binding, contributing to juiciness, firmness of cut, and mouthfeel.

Technical content is compiled and updated by the SoleChem product team from public technical sources; the certificate of analysis (COA) governs product-specific specifications.