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Carbopol Ultrez-21 10 g

Building a Clear Salt-Tolerant Gel Without Guesswork

Carbopol Ultrez-21 is a modified acrylic polymer designed to produce clear, high-viscosity gels that remain stable in the presence of electrolytes and alcohol. Compared to classic carbomers, this grade tolerates salts, acids and ethanol far better, which makes it a preferred choice for hand sanitizers, toning gels, salt-thickened shower gels and pharmaceutical gel bases. The product belongs to the gelling agents and thickeners section, where formulators can find materials for building structured textures of varying density and clarity.

The strongest demand for this type of polymer comes from skincare and color cosmetics manufacturing: body and hand gels, cream bases, gel masks, hair styling products, as well as pharmaceutical and dental gel formulations. In food and household chemistry acrylic thickeners are rarely used, but they remain essential in producing hand sanitizers and antiseptic gels, where viscosity has to stay stable even at high alcohol concentrations. The mechanism is straightforward: the powder swells in water, and after neutralizing with an alkali such as triethanolamine, sodium hydroxide or aminomethyl propanol, the polymer chains uncoil and the mixture thickens rapidly into a clear, stable gel.

For a 10 gram package, the recommended dosage typically falls between 0.2 and 1 percent of the finished product weight, which is enough for several trial batches when developing a formula at home or launching a small studio production run. The powder should be dispersed gradually into cold or room-temperature water to avoid clumping, left to swell for 15 to 30 minutes, then neutralized slowly with constant stirring. Active ingredients, preservatives and fragrances are best added after the gel has stabilized, at a temperature no higher than 40 degrees Celsius, to keep the polymer structure intact.

Carbopol Ultrez-21 combines well with other thickeners when a blended texture or reduced tackiness is needed. Adding a small amount of hydroxyethyl cellulose softens the final feel and reduces the stringy texture typical of pure acrylic gels, while classic Carbomer 934 can be used alongside it in formulas where electrolyte tolerance is not critical but extra body is desired. When comparing gelling mechanisms in experimental food or cosmetic textures, formulators sometimes reference animal-based gelatin, even though its thickening principle is entirely different from acrylic polymers.

Store the powder in a tightly sealed container, in a dry place away from direct sunlight, since the polymer is hygroscopic and prolonged exposure to humid air can affect its dispersion quality later on.

Clear Cooling Gel for Tired Legs

Distilled water 95 ml

Carbopol Ultrez-21 0.5 g

Triethanolamine 0.6 ml

Glycerin 2.5 ml

Menthol solution 0.5 ml

Peppermint essential oil 0.4 ml

Date:

today

Author:

Максим, Хмельницкий

Reviews

Відмінний магазин! Рекомендую усім, хто цінує якість.

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Анастасія, Антрацит

Идеальное место для покупки ингредиентов для косметики.

1 August 2026

Валентина, Лозанна

Задоволена покупкою, все прийшло швидко і в ідеальному стані.

INCI	Carbopol Ultrez 21, Acrylates/C10-30 Alkyl Acrylate Crosspolymer
pH	4.0 – 10.0
Other
Att brand	Germany
Color product	white
Features	All information presented on the site is for reference only
Input percentage	0,1-2%, загущать в теплой водной фазе,флюиды, гели и сыворотки; очищающие составы, демакияж; средства для укладки волос; молочко для тела, дезодоранты; антиперспиранты и декоративная косметика; маски для лица и волос; детская косметика; косметика для пляжа; зубные пасты и гели
Minimum count	1
Name	Carbopol Ultrez-21 10 g
Packaging	container for transportation
Packing	10 grams
Solubility	water
Type	gelling agent
View	amorphous powder
Valid until	10.2028