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Alginic Acid

Category: Chemicals

Alginic acid (E400) is a natural polysaccharide extracted from the cell walls of brown seaweed. It swells in water to form a viscous gum and is the parent acid of the alginate salts. Nustras supplies it as a white to pale yellowish-brown powder in a pharmacopoeial (NF) grade, with a low-viscosity option.

Alginic acid is formulated into tablets as a disintegrant and binder, into dietary-fibre supplements and functional foods, into pharmaceutical suspensions and raft-forming formulations, and into thickened and stabilised food products such as sauces, fillings and dairy desserts.

The material is a white to pale yellowish-brown, crystalline or amorphous powder. CAS number 9005-32-7. Identity is confirmed by the pharmacopoeial tests, acid value by titration, with pH of a dilute dispersion, viscosity, loss on drying, ash, heavy-metal and microbial limits supplied to specification and confirmed on each lot's certificate of analysis.

Nustras supplies alginic acid of Chinese origin in bulk commercial quantities, in food-grade bags and fibre drums, to manufacturers and formulators internationally, with a certificate of analysis, specification sheet and country-of-origin documentation on every lot. Alginic acid is an accepted food additive and pharmaceutical excipient in major markets; buyers confirm the permitted use and level for their application. Contact us for grade, pricing per kilogram and lead time.

Technical Specifications

CAS 9005-32-7
AssayAcid value > 230 (NF18)
AppearanceWhite to pale yellowish-brown crystalline or amorphous powder
Grade / StandardsFrom brown seaweed, NF18 grade, pH 1.5–3.5 (3% soln), Low-viscosity option (<50 mPa·s)
Country of OriginChina
Synonyms: Algin, Alginic acid, E400
Available Forms: Powder
Applications: Dietary fibre, Thickener & stabiliser, Antacid / GI formulations, Functional foods

Alginic acid is a natural polysaccharide extracted from brown seaweed, supplied as a white to pale yellowish-brown powder to NF18 grade (pH 1.5–3.5). It is used as a dietary fibre, thickener/stabiliser and in antacid and gastrointestinal formulations.

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