Diethylene Glycol Test

Diethylene glycol (DEG) is a compound that is sometimes illegally used as a cheap substitute for other ingredients in cosmetics. Its presence in cosmetic formulations may pose significant health risks.

Protheragen-ING provides comprehensive DEG testing services for cosmetics to identify and eliminate this harmful compound in cosmetics to ensure the safety and quality of your products. Our DEG testing services provide accurate and reliable results to help you meet regulatory requirements and ensure the safety and quality of your products.

Why Choose DEG Testing?

Detection and quantification of diethylene glycol in cosmetics is critical.

Pesticide Residue in Cosmetics.

Comprehensive DEG Test Services

Protheragen-ING detects and quantifies DEGs in cosmetic samples in its state-of-the-art laboratory. We utilize proven and reliable methods to deliver accurate results.

Our DEG testing services include:

Customized Test Plan

Protheragen-ING works closely with you to develop a customized testing plan suitable for your product. Our team of experts stays up to date on the latest regulations for DEGs in cosmetics and can provide guidance and support to help you understand and comply with the necessary regulatory requirements. We prioritize confidentiality and ensure the protection of your proprietary recipes and test data.

Advanced Testing Technology

DEG testing typically involves a combination of qualitative and quantitative analysis to detect and measure the presence of DEGs in cosmetic samples.

Below are some common test methods and procedures for our DEG testing.

Gas Chromatography (GC)

It involves separating and quantifying the individual components of a sample based on its volatility. In GC analysis, the sample is evaporated and injected into a gas chromatograph equipped with a suitable detector, such as a hydrogen flame ionization detector (FID) or a mass spectrometer (MS). Retention times and peak areas of DEG compounds were measured and compared with known quantitative standards.

High-Performance Liquid Chromatography (HPLC)/Ultra-Performance Liquid Chromatography (UHPLC)

In this method, the sample is dissolved in a suitable solvent and injected into the liquid chromatograph.

We use a stationary phase to separate the DEGs from other components in the sample and a mobile phase for elution. Detection can be performed using various detectors, such as UV-visible detectors or refractive index detectors.

Pesticide Residue Test.

Mass Spectrometry (MS)

Mass spectrometry can be combined with gas or liquid chromatography for DEG analysis. It involves ionizing sample molecules and measuring the mass-to-charge ratio of the resulting ions.

The characteristic mass spectrum of a DEG can be compared to a reference spectrum for identification, and the intensity of specific ions can be used for quantification.


Spectrophotometry is a technique that measures the absorption or transmission of light at specific wavelengths by a sample. DEGs can be quantified indirectly by reacting with appropriate reagents to produce colored compounds and measuring the absorbance of the colored products using a spectrophotometer. This method requires the use of specific reagents and following an established protocol.

Please contact Protheragen-ING today to discuss your testing needs and request a quote. Our team of professionals is ready to help you maintain the integrity and trust of your brand. We will respond within 2-4 working days.


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Sunday : 9.30 AM–1.00 PM
Holidays: Closed

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