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Tromethamine in cosmetics? Is it safe? 2017-08-18 17:01:13
A lot of cosmetics on the market claim to be natural and no additives, however, it is impossible. The effective skin care products must add other ingredients besides the natural ones, such as anti-corrosion, moisturizing or whitening and other ingredients. You may find tromethamine is a very common additive in cosmetics. Then what is the role of it in cosmetics? Is it safe?


The main additives in cosmetics are as follows:

Antioxidants, preservatives, humectant, surfactant, acid, alkali, salt substances, spices, and other special additives which make cosmetics have special effects, such as vitamins, hormones, phospholipids, anti-inflammatory agent, brightener, UV absorber, placenta extract, allantoin, herbs and folk medicine infusion, natural plants, vegetables, fruit extracts and so on.

Tromethamine, is also known as tris(hydroxymethyl)aminomethane, or Tris. It is a kind of white crystal, odorless, slightly sweet taste and bitter. In the experiments of biochemistry and molecular biology, it is the most commonly used preparation material for buffers. In addition, tromethamine is also the intermediates of surfactants, vulcanization accelerators and some medicine.


CAS:1185-53-1 Tris(hydroxymethyl)aminomethane


The most important effect of tromethamine in cosmetics is to adjust the pH. The pH of healthy oriental skin should be 4.5~6.5, the skin will be in the best state to absorb nutrients only in the normal pH range. In this range, the skin is in the best condition of flexibility, gloss, moisture, etc., and could defend against external erosion. However, the composition of cosmetics is complex and the pH changes greatly, it depends not only on the variety, source and formula of the raw material, but also relates to the participation of microbes during storage, the oxidation of air and the failure of preservatives. Therefore, it is necessary to add a buffer to adjust the pH. Thanks to tromethamine, the pH of the whole system can be maintained without significant changes. In addition, it can be used as a thickener and a humectant.



So how is the safety of tromethanol? In fact, there are other kinds of substances commonly used to regulate the pH, such as sodium hydroxide, sodium citrate, triethanolamine. However, tromethamine is the most safe one, it is not easy to cause skin irritation and allergic reactions, sensitive skin can also use it. And the amount of additives added in the cosmetics is not much, there will be no security risks with normal use.

Skin care products are composed of a variety of raw materials and chemical molecular, the substances and the production process is much more complex than imagined. The additives are not sinful, but to ensure the function and quality of skin care products. The listed products are generally safe and would not cause the burden and harm to skin.

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