Hair Dye Test

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Hair dye is one of the common cosmetic testing categories. For safety reasons, the testing of cosmetic hair dyes is an essential step in the production and marketing of their products.

Protheragen-ING's comprehensive hair dye safety testing services are designed to ensure that your hair dye products are safe, of high quality and suitable for your specific needs.

Harmful Substances in Hair Dyes

Excessive levels of harmful substances in hair dyes can seriously threaten the physical and mental health of consumers.

There are more than 20 kinds of chemical substances in hair dyes, among which the contents are strictly controlled and the following five are more harmful.

P-phenylenediamine is an important ingredient in hair dyes, and its coloring effect is relatively significant. It is a high sensitizer, in addition to being easily penetrated into the body through the scalp.
Lead reacts with sulfur to produce black sulfide, which is the coloring principle of this hair dye. It can easily cause poisoning, resulting in headache, weakness, numbness of the limbs, abdominal pain, etc. It may also cause anemia, asthma and many other diseases.
Hydroquinone is a substance with a strictly defined limit in hair dyes and is an organic drug. The maximum permitted concentration is 0.3%. Once used, it must be stated that it contains this substance.
Resorcinol can irritate the skin and mucous membranes and can be rapidly absorbed through the skin causing poisoning.
Para-aminophenol is toxic. Absorption through the skin can cause dermatitis, can cause methemoglobinemia and asthma.

Hair Dye Test Methods.

Protheragen-ING's Comprehensive Testing Services

Hair dyes refer to oxidizing and non-oxidizing hair dyes that can change the color of the hair. Protheragen-ING can carry out comprehensive testing of hair dyes, detecting the composition, harmful substances, pH, heat resistance, cold resistance, oxidizing agent content, coloring ability and other indexes, and issuing reports on the testing of hair dyes.

Test Items

Sensory testing items: appearance, odor.
Physical and chemical performance testing items: pH, oxidant content, heat resistance, cold resistance, dyeing ability.
Hygienic testing items: total mold and yeast, fecal coliform, Staphylococcus aureus, Pseudomonas aeruginosa, total colony count.
Heavy metal testing items: lead content, mercury content, arsenic content.
Efficacy and safety evaluation: Photo Patch Test, Human Skin Patch Test, Closed Patch Test, Open Application Patch Test, Repeat Insult Patch Test.

Testing Methods

The main focus of hair dye testing is on aromatic amines and heavy metals.

The main testing methods for aromatic amine compounds are high-performance liquid chromatography (HPLC), liquid mass spectrometry (LC-MS), gas chromatography (GC-MS), gas chromatography-mass spectrometry (GC-MS), and high-performance capillary electrophoresis.

As for heavy metal detection methods, we can choose atomic absorption spectrometry, and atomic fluorescence spectrometry. Among them, flame atomic absorption spectrometry is the most common detection method for heavy metal elements in hair dyes.

Hair Dye Test.

Types of Hair Dyes Tested

Cream hair dyes, gel hair dyes, mousse hair dyes, powder hair dyes, hair coloring strips, moisturizing hair dyes, hair coloring powders, hair coloring powders, hair coloring creams, oxidizing hair dyes, long-lasting hair dyes, metal salts hair dyes, natural botanical-based hair dyes, temporary hair dyes, semi-long-lasting hair dyes, etc.

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