Soap Analyses

Soap is an essential component of hygiene, personal care, and skin health. As both traditional solid soaps and liquid soaps come into direct contact with the skin, they must undergo stringent quality controls. Soap analyses ensure that these products are tested for both user safety and regulatory compliance.

Why are Soap Analyses Necessary?

For soap manufacturers, demonstrating the quality, efficacy, and safety of their products is crucial not only for consumer trust but also for regulatory compliance. Thanks to soap analyses:

• product content is verified
• pH value and skin compatibility are assessed
• the risk of microbial contamination is determined
• label claims are confirmed with accuracy

Key Tests for Soaps

The following tests for solid and liquid soaps are conducted in our laboratory in Germany:

• Determination of Total Alkali Content: BS 1715-2.1, ISO 684
• Determination of Total Free Alkalinity
• Free Fatty Acid Content
• Determination of Ethanol (Alcohol) Soluble Matter Content
• Chloride Determination: TS 54 ISO 457, TS 5155
• Determination of inorganic salts: TS 9676
• Determination of Free Caustic Alkali (NaOH/KOH) Content
• Determination of Water-Insoluble Matter Content: TS 54
• Determination of Moisture and Volatile Matter: ISO 672

Product Groups Tested

• Conventional Bar Soaps
• Liquid Hand Soaps
• Antibacterial Soaps
• Natural and Organic Soaps
• Disposable Hotel Soaps
• Specially Formulated Baby Soaps