Industry pain point: Zero tolerance of TRIS odor in daily chemical formulas

1, Industry pain point: Zero tolerance of TRIS odor in daily chemical formulas

In cosmetics, toiletries, and other daily chemical formulas, Tris (INCI name: Tris (hydroxymethyl) aminomethane) is a commonly used pH regulator and carbomer neutralizer. However, more and more daily chemical companies are using odor as a criterion for TRIS screening in the raw material storage process - this phenomenon reflects the industry's rigid demand for "ammonia free TRIS".

Why is the daily chemical industry so sensitive to the odor of TRIS?

Firstly, the shelf life of daily chemical products is generally as long as 1 to 3 years. During the long storage process, the volatile amine impurities remaining in TRIS will continue to release slowly, gradually covering the essence aroma of the formula, leading to the problems of the finished product, such as odor change, odor, and flavor turbidity.

Secondly, no essence products, mother and baby care products, sensitive skin care products have zero tolerance for odor. This type of product relies on the original flavor of the raw materials to present its texture, and any slight ammonia or odor will directly become a quality defect of the product, affecting the end consumer experience.

More importantly, odor is a quality reference indicator for TRIS raw materials. TRIS with odor is generally accompanied by high levels of volatile impurities.

2, The core role of TRIS in cosmetics

TRIS (chemical name trihydroxymethylaminomethane, CAS number 77861) is a zwitterionic biological buffering agent widely used in the cosmetics industry.

2.1 pH adjustment and buffering

The core function of TRIS in cosmetics is to stabilize the pH value of the product. The effective buffering range of TRIS is pH 7.0-9.0, with a pKa of 8.06 (25 ℃), which can keep the product pH constant within the pH range suitable for human skin use and maintain the functional effectiveness of the active ingredient.

TRIS is widely used as pH regulator in skin care lotion, sunscreen, eye makeup products, nail polish and other categories.

2.2 Use in conjunction with Carbopol

Carbomer is one of the commonly used thickeners in cosmetics. Carbomer solution is acidic and needs to be adjusted to neutral pH to achieve good thickening or gel effect.

TRIS itself is alkaline and can react with acidic components in Carbopol to form water-soluble salts, which not only improve the solubility of the polymer, but also affect the stability and rheological properties of the final product. Compared with sodium hydroxide regulation, TRIS does not introduce metal ions and does not reduce the moisturizing effect of skincare products due to increased osmotic pressure; Compared with triethanolamine (TEA), TRIS has a smaller molecular weight and can achieve the same pH adjustment effect with less addition. After neutralization, the skin feels fresher and less sticky.

2.3 Odor regulator

It is worth noting that TRIS can also be used as an odor regulator in cosmetics containing amine salts, regulating the odor of amines produced by friction during application, thereby avoiding any residual or persistent odor release. That is to say, high-quality TRIS not only has no odor on its own, but also helps eliminate odors produced by other ingredients in the formula.

3, The source of ammonia odor

From the perspective of molecular structure, compliant high-purity TRIS has stable chemical properties and is non-volatile and odorless at room temperature. The pungent ammonia odor that appears in low-end TRIS on the market is mainly due to volatile impurities remaining in the synthesis and purification processes.

TRIS is synthesized using ammonia and trimethylolpropane as raw materials. When the process does not meet the standard, residual odor causing impurities will remain: unreacted free ammonia/organic amine by-products/low molecular weight volatile intermediates.

These types of impurities have low boiling points and are easily volatile. They will continue to release odors in the daily chemical aqueous solution system, directly destroying the fragrance of the product.

Therefore, the core odor quality control standards of TRIS for daily chemical products are based on the absence of visible impurities, clear and odorless aqueous solutions, and compliance with volatile amine residues - this is also the key boundary for distinguishing industrial grade and daily chemical grade raw materials.

4, Advantages of using TRIS without ammonia odor in cosmetics applications

4.1 Do not interfere with the essence system

Since the high-purity TRIS is odorless and tasteless, it will not interfere with the performance of essence in the formula, so it has excellent applicability in products without essence or low essence. This is particularly important for skincare brands that pursue a natural and pure positioning.

4.2 Higher Security

Compared with traditional neutralizing agents such as triethanolamine, TRIS has higher safety. The CIR (Cosmetic Ingredient Review Expert Group) has determined that TRIS is safe for use in cosmetics at the current level of use. Especially for sensitive skin formulas, TRIS is considered a safe and mild neutralizing agent due to its high purity and low toxicity.

4.3 Help formula upgrade

With consumers pursuing the concept of "clean ingredients" and "no additives" in skincare, more and more brands are choosing TRIS to replace traditional alkaline modulators such as triethanolamine and sodium hydroxide. TRIS not only avoids the problem of ammonia odor, but also brings a fresher skin feel and a more stable formula system.

5, Selection criteria for cosmetic grade TRIS

For cosmetic formula companies, when choosing non ammonia TRIS raw materials, it is recommended to focus on the following indicators:

Legitimate daily chemical enterprises have generally established strict raw material entry testing mechanisms, using TRIS odor screening and aqueous solution odor verification as testing items to avoid product quality risks from the source.

6, Hubei Xindesheng: Supplier of ammonia free TRIS

Hubei Xindesheng Material Technology Co., Ltd. has been specializing in the research and production of biological buffering agents for more than ten years, and has accumulated profound technical expertise in the research and production of TRIS products.

In response to the requirements of TRIS odor in the daily chemical industry, Xindesheng adopts a multi-stage refining crystallization process to remove volatile amine impurities, strictly controlling the odor of raw materials and various physical and chemical indicators. The finished product has no peculiar smell and strong batch stability, and can be widely used in various daily chemical products such as skin care lotion, sunscreen, eye makeup products, nail polish, and toiletries.

Core advantages of New Desheng TRIS products:

Purity stability ≥ 99%: High purity ensures odorless quality from the source

Odorless and Odorless: Through multi-stage refining and crystallization processes, volatile amine impurities are completely removed

Strong batch consistency: inter batch differences are controlled within 1% to ensure stable odor in each batch

Fully qualified: strictly organize production in accordance with ISO 9001 quality management system

Annual production capacity of 2000 tons: Large scale supply to ensure stable delivery of large orders

The company also provides various biological buffering agents such as Tris, Bicine, Caps, Mops, Taps, EPPS, etc., committed to providing high-quality core raw materials for industries such as cosmetics, in vitro diagnostics, and biopharmaceuticals.