Overview
Ammonium lactate (CAS 515-98-0 ), also known commercially as Lac-Hydrin, is the ammonium salt of lactic acid used across food, cosmetic, and pharmaceutical manufacturing. It functions primarily as a pH buffer, humectant, and mild preservative.
This versatile compound is highly relevant to formulators working across multiple regulated categories. In pharmaceutical topical formulations, it delivers moisturization and mild keratolytic activity for skin health.
It is a standard active in prescription and OTC dry skin lotions. Food manufacturers use it as a pH regulator and buffering agent in processed and fermented products where lactic acid alone may be too aggressive.
In personal care, it appears in body lotions, creams, and scalp treatments where controlled moisture retention is required. Mild acidification is another key benefit provided by this ingredient in cosmetic applications.
Preservation-boosting systems in cosmetic formulations also incorporate it to support antimicrobial efficacy at specific pH ranges. This ensures product stability and safety throughout the shelf life of the formulation.
Ammonium lactate is supplied as an aqueous solution, typically at 60% concentration, though other concentrations are available. Pharmaceutical-grade material is produced to USP specifications for high purity.
Food-grade product meets FCC standards to ensure safety in edible applications. Technical-grade solution is also available for industrial pH control and various non-regulated manufacturing applications.
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Physical Properties
| Melting Point | 91-94 °C |
| Boiling Point | 74 °C @ Press: 0.14 Torr |
| Density | 1.054 g/mL at 25 °C |
| Color | Colorless to light yellow |
| Form | Liquid |
| Water Solubility | Water: 125 mg/mL (1167.02 mM) |
| Refractive Index | n 20/D 1.363 |
| pH | 6.58(1 mM solution);6.56(10 mM solution);6.55(100 mM solution);6.5(1000 mM solution) |
Safety & Handling
Warning GHS07 Hazard Statements H315 Causes skin irritation H319 Causes serious eye irritation H335 May cause respiratory irritation Precautionary Statements P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P271 Use only outdoors or in a well-ventilated area. P280 Wear protective gloves/protective clothing/eye protection/face protection. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Other Names
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Chemical Properties
- CAS Number
- 515-98-0
- EC Number
- 208-214-8
- Mol. Weight
- 107.11
- Category
- Organic Acids