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The cloud point is the temperature at which a liquid becomes cloudy upon cooling, due to the precipitation of certain components (waxes, fatty acids, crystals, or impurities). This parameter is a key indicator of low-temperature stability , particularly useful for lipid, aqueous, or surfactant products.

Cloudiness often results from a change in solubility or partial crystallization of a phase. This phenomenon can alter the appearance, texture, or performance of the product. Therefore, measuring the cloud point is essential to ensure the quality, conformity, and stability of formulations under cold storage or usage conditions.

Principle and method of analysis

The determination of the cloud point is carried out according to standardized methods, generally by differential scanning calorimetry (DSC) or by visual observation under controlled cooling .

• In DSC , the sample is cooled at a precise rate and the change in heat flow is recorded. The point at which crystallization occurs corresponds to the cloud point.
• In the visual method, the temperature at which the solution begins to cloud is observed under diffuse light.

This analysis applies in particular to:

• vegetable oils and fats (determination of cold weather behavior),
• cosmetic and nutraceutical products (stability of oily or emulsified formulations),
• aqueous solutions (detection of precipitates, surfactants, salts or water-soluble polymers),
• polymers and materials (miscibility and thermal compatibility study).

To learn more, also check out:

• Differential scanning calorimetry (DSC) to analyze thermal transitions,
• analysis (TGA) to monitor thermal decomposition,
• and the measurement of the melting point to characterize solid/liquid phase transitions.

Industrial applications

The measurement of the disturbance point has various applications depending on the sector:

• Food processing : control of edible oils, butters, margarines or sauces to guarantee cold stability and product homogeneity.
• Cosmetics : evaluation of the stability of creams, lotions and serums containing oily phases or temperature-sensitive emulsifiers.
• Nutraceutical : stability test of oils rich in polyunsaturated fatty acids, extracts or macerates.
• Materials and polymers : study of the compatibility of polymers and plasticizers, or of the behavior of resins at low temperature.
• Chemistry and detergents : control of solvents, surfactants or cleaning products used in cold conditions.

This test makes it possible to predict the behavior of finished products in winter conditions and to optimize their formulation and storage .

Analytical interest and complementarity

The cloud point is often combined with other thermal or physicochemical analyses to obtain a complete characterization:

• Melting point to determine the reverse thermal transition;
• Liquid refractive index to track purity and concentration;
• Enthalpy of fusion to quantify the transition energy;
• Accelerated aging test to assess stability over time;
• Phenolic assay to correlate oxidative stability and thermal behavior.

Combining these analyses allows us to establish a complete thermal profile , useful for formulation and quality control.

YesWeLab Services

YesWeLab relies on a network of partner laboratories accredited to ISO 17025 and/or COFRAC , specializing in thermal, physicochemical, and rheological analyses .
Our experts will assist you in defining the protocol best suited to your matrix (oil, emulsion, aqueous solution, polymer) and your regulatory requirements.

Thanks to the YesWeLab digital platform , you can centralize your requests, track your samples, and view your analysis reports online.
Since 2020, YesWeLab has been supporting food, cosmetics, and chemical manufacturers in controlling the thermal stability and quality of their formulations .

For any specific request or quote, contact our scientific team today.