Chitosan Hydrochloride – (Shellfish)

What You Are Ordering: a Defined Chemical Identity

Shellfish Chitosan Hydrochloride Powder is not a generic “chitosan” listing – it is a defined chemical entity. The salt form of chitosan, produced by reacting shrimp- and crab-derived chitosan with hydrochloric acid: the polymer’s free amino groups are protonated and stabilized as chloride pairs during manufacturing, so the powder you receive carries its charge state already in place.

The identity behind the label: CAS number 70694-72-3, biological source shrimp and crab, degree of deacetylation ≥85% (batch result on the current COA), molecular weight 50,000-100,000 Da, off-white to cream fine powder, manufactured in a registered FDA food facility. Batch-specific values and documents are published on this page – the specification you qualify against should be the batch’s, not the category’s.

Two practical consequences follow from that identity. First, consistency: because the source is crustacean shell waste from an established processing infrastructure, supply is abundant and the raw-material base is the industry’s longest-running – but the specification you validate is still batch-specific, since shell species and processing conditions shift the finished values. Second, documentation: pharmaceutical, food, and cosmetic buyers each need different paperwork depth, and this page’s Key Documents section plus the technical team supply what your market requires rather than a one-size-fits-all datasheet.

Why This Form Exists: the Problem It Solves in Your Process

Native chitosan only dissolves in acidic solution – above roughly pH 6 its amine groups stay unprotonated and the polymer stays functionally insoluble, whatever your stirring time. Any process that must stay at or near neutral pH, or that carries an acid-sensitive active, cannot rely on native chitosan without an added acid step the formulator then has to manage, validate, and document.

This powder removes that step at the manufacturing stage: the protonation work is already done, so dissolution in water is direct. Two research findings sharpen the value: hydrochloric acid protonates chitosan’s amino groups more completely than weaker organic acids such as acetic acid at comparable concentrations – part of why the salt dissolves reliably – and salt-form solutions exhibit measurably lower viscosity than equivalent acetic-acid systems, useful for sprayable and pumpable processes. Peer-reviewed background: Chitosan: Sources, Processing and Modification Techniques (PMC9322947) and the stability review (PMC4413189).

The honest boundary: if your process already runs in controlled acid, native chitosan does the same polymer job without the salt premium – native shellfish chitosan is that alternative, and the full comparison is in chitosan hydrochloride vs native chitosan.

How It Behaves Once Dissolved

Once the powder is in solution, the polymer behaves as a cationic polyelectrolyte – the same chitosan chemistry as any chitosan source, expressed through the salt form’s charge state:

• Charge interaction – the protonated amine groups interact with negatively charged particles, surfaces, and macromolecules; this is the mechanism behind flocculation, encapsulation, and adhesion behavior in every application above
• Film and gel formation – the backbone retains chitosan’s film-forming and gel-forming capability where the formulation allows, including mild aqueous casting
• Viscosity that scales predictably – solution viscosity rises with concentration and molecular weight, without the non-linear jumps acid-system chitosan can show; still, behavior at 2-3% concentration should be confirmed against the batch’s tested values, since viscosity does not scale linearly from a 0.5% result
• pH-stable charge state – unlike native chitosan, whose effective charge fades as pH rises past its pKa, the salt form holds its protonated state across a substantially wider working range; extreme pH shifts elsewhere in the formulation can still affect long-term stability, which is why solution pH is worth recording during trials

What this means in practice: the material’s behavior is set by four batch properties – DDA, molecular weight, viscosity, and purity – and by how your formulation’s pH and ionic environment interact with them. None of those four can be inferred from the product name; all four are on the batch Certificate of Analysis, viewable in the Key Documents section of this page.

Where Shellfish Chitosan Hydrochloride Powder Performs

The salt form earns its place where neutral-pH handling and cationic behavior intersect:

• Drug-delivery research – mucoadhesion, ionic-gelation nanoparticles (with TPP), and hydrogel/film systems across oral, nasal, ocular, and buccal routes
• Water treatment – a readily soluble cationic flocculant for turbidity, heavy metals, and dyes, validated by jar test
• Cosmetics – water-based serums, toners, and hair-care formats where native chitosan’s acid dependency conflicts with target pH
• Food, agriculture, and industrial aqueous systems – beverages, sprays, and treatment streams without an acid carrier

Two notes on boundaries: this material is derived from crustacean chitin, so it is not shellfish-free and should not be labeled as such – if your program requires that, the same salt chemistry from fungal chitin is mushroom chitosan hydrochloride. And solubility is a starting capability: solution behavior still depends on concentration, pH, and your formulation matrix – trial the batch under your real conditions.

Why Order from Chitosan Global

Shellfish Chitosan Hydrochloride Powder is supplied with a batch-specific Certificate of Analysis covering deacetylation, molecular weight, viscosity, and solubility – viewable in the Key Documents section above – alongside SDS documentation, from a registered FDA food facility. Orders run from a first 25 g laboratory sample through 1 kg standard packs and bulk quantities quoted by volume and destination, with a technical team that answers specification questions directly rather than forwarding them upstream.

For the complete technical picture – how the salt is manufactured and tested, which specifications matter, and the full buying workflow – the dedicated resources are linked on this page’s related-guides section, starting with the shellfish chitosan hydrochloride guide.

Ready to test it in your formulation? Request the 25 g sample, or contact the technical team with your application, target specification, quantity, and documentation requirements.