Chitosan HCl, also known as Chitosan Hydrochloride, is the hydrochloride salt of chitosan. Chitosan is a polyaminosaccharide obtained through the deacetylation of chitin. In Chitosan HCl, the amino groups of the chitosan polymer are associated with hydrochloride, producing a salt form with different solubility and formulation characteristics from unmodified Chitosan.
Chitosan HCl is used in cosmetic formulations primarily for skin conditioning and humectant applications. The Korean Cosmetic Association identifies Chitosan HCl as the hydrochloride salt of chitosan and lists its cosmetic purpose as skin conditioning and humectancy.
Chitosan HCl is a hydrochloride salt of the chitosan polymer. Chitosan consists of repeating glucosamine and N-acetylglucosamine units, with the degree of deacetylation affecting its chemical and physical properties.
The hydrochloride form is produced by associating chitosan with hydrochloric acid. This changes the protonation state of the amino groups and can improve the material's behavior in aqueous acidic formulations.
Chitosan HCl is recognized as a skin-conditioning ingredient. In cosmetic formulations, skin-conditioning materials are used to help maintain the skin in good condition and improve the sensory properties of a finished formulation.
Chitosan HCl can therefore be considered for selected creams, lotions, serums, masks and other personal-care products.
Chitosan HCl is also identified for humectant functionality. Humectants help attract and retain moisture within cosmetic formulations and on the skin.
The actual moisturizing performance depends on the grade, concentration, formulation pH and other ingredients present in the finished product.
Chitosan is the parent polymer, while Chitosan HCl is its hydrochloride salt form.
The two materials should not automatically be treated as interchangeable because salt formation can affect properties such as solubility, viscosity, charge behavior and formulation compatibility.
Chitosan HCl and Chitosan Lactate are different salt forms of chitosan.
Chitosan HCl contains the hydrochloride component, while Chitosan Lactate contains the lactate component associated with lactic acid. Their technical properties and formulation behavior can therefore differ.
Chitosan HCl and Chitosan PCA are also different chitosan salt forms.
Chitosan PCA contains pyrrolidonecarboxylic acid, whereas Chitosan HCl contains hydrochloride. Chitosan PCA is recognized for film-forming, humectant and skin-conditioning functions, while Chitosan HCl is identified primarily for skin conditioning and humectancy.
Chitosan itself has limited solubility in neutral water, while protonation of its amino groups in acidic media can improve its aqueous behavior. The exact solubility of Chitosan HCl depends on the grade, molecular weight, degree of deacetylation, concentration, temperature and pH.
Therefore, a universal solubility value should not be assigned to every commercial Chitosan HCl grade.
Chitosan HCl is a polymeric material, so it does not have one universal molecular weight applicable to all grades.
Commercial grades can differ in molecular-weight distribution and viscosity. The relevant molecular-weight specification should be taken from the manufacturer's technical documentation.
Degree of deacetylation is one of the most important technical characteristics of chitosan-based ingredients. It represents the proportion of deacetylated units in the polymer and can influence charge density, solubility, viscosity and interaction with other ingredients.
The degree of deacetylation of Chitosan HCl is grade-dependent and should be specified according to the actual commercial material.
Viscosity depends on molecular weight, concentration, degree of deacetylation, pH, temperature and test method.
Consequently, viscosity should be reported using the actual manufacturer's test conditions rather than assigning one generic value to all Chitosan HCl products.
Chitosan HCl can be evaluated in skin-care formulations where conditioning and moisture-management properties are desired.
Potential applications include:
Chitosan-based materials can also be incorporated into hair-care formulations. The suitability of a particular Chitosan HCl grade depends on its molecular characteristics, charge behavior, solubility and compatibility with the formulation.
Potential applications can include conditioners, hair treatments and selected hair-care systems.
Chitosan HCl is a polymeric raw material rather than a conventional small-molecule cosmetic ingredient. Its performance depends strongly on polymer characteristics.
Important parameters include molecular weight, degree of deacetylation, viscosity, moisture, ash, pH and solubility.
When formulating with Chitosan HCl, the following should be considered:
Because these parameters vary by grade, formulation testing should be performed using the exact commercial material intended for production.
Chitosan HCl should generally be stored in a tightly closed container in a cool, dry environment, protected from excessive moisture and unsuitable storage conditions. Exact storage conditions should follow the manufacturer's TDS and SDS.
Chitosan HCl can be evaluated for use in:
Chitosan HCl is the hydrochloride salt of chitosan.
It is used primarily for skin conditioning and humectant functions.
The INCI name is Chitosan HCl.
The CAS identity requires attention because different databases use different identifiers. The Korean Cosmetic Association lists 9012-76-4 for Chitosan HCl, while PubChem and European regulatory sources identify Chitosan Hydrochloride as 70694-72-3. The CAS printed on the SDP page should match the exact supplier grade and COA.
Yes. Chitosan HCl is identified for humectant functionality in cosmetic ingredient information.
Yes. Skin conditioning is an identified cosmetic function of Chitosan HCl.
No. Chitosan HCl is the hydrochloride salt form of chitosan.
No. Chitosan HCl contains hydrochloride, whereas Chitosan Lactate contains lactate.
No. Chitosan PCA is the pyrrolidonecarboxylic acid salt of chitosan.
There is no single universal molecular-weight value because Chitosan HCl is a polymeric material and commercial grades vary.
It is grade-dependent and should be taken from the relevant TDS or COA.
Its aqueous behavior depends on pH, molecular weight, degree of deacetylation and grade. Chitosan hydrochloride is generally more amenable to aqueous acidic systems than unmodified chitosan.
It can be used in selected skin-care, moisturizing, conditioning and personal-care formulations.
| Parameter | Specification |
|---|---|
| Appearance | White to off-white powder |