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Alginic acid from brown algae

Alginic acid from Macrocystis pyrifera (kelp), Mixed polymer of mannuronic and guluronic acid
Linear Formula:
CAS Number:
EC Number:
MDL number:



Quality Level

pH range



300 °C


H2O: insoluble, but swells
aqueous base: soluble


diagnostic assay manufacturing

storage temp.

room temp

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General description

Alginic acid is a high molecular weight linear polymer isolated from seaweed. It is a linear β-1→4-linked polymer of n-mannuronic and L-guluronic acid. It is an acid polysaccharide present in the extracellular matrix of brown algae. It is reported to inhibit the reverse transcriptase activity of HIV. Structural investigation of alginic acid, a marine algal polysaccharide poly-α-L-guluronic acid, has been reported. Anti-inflammatory effect of alginic acid, isolated from the brown algae Sargassum wightii, in type II collagen induced arthritic rats has been reported. Pyrolysis of alginic acid using py-GC/MS over a wide temperature range (200-800°C) and thermogravimetric analysis (TGA) has been reported. It was reported to cause the biocorrosion of thin films of copper on germanium internal reflection elements (IREs).


Alginic acid is suitable reagent used to study the in-vitro and in-vivo mitogenic activity of alginates. It is suitable for use in the spectrophotometric determination of transparent exopolymer particles by dye-binding assay.


100, 250, 500 g in poly bottle
1 kg in poly bottle

Other Notes

A straight-chain, hydrophilic, colloidal, polyuronic acid composed primarily of anhydro-β-D-mannuronic acid residues with 1→4 linkage.

Storage Class Code

13 - Non Combustible Solids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

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Certificate of Origin

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C H Sarithakumari et al.
International immunopharmacology, 17(4), 1108-1115 (2014-01-22)
The present study evaluated the anti-inflammatory potential of alginic acid isolated from the brown algae Sargassum wightii in type II collagen induced arthritic rats, a well established arthritic model that resembles more closely to human rheumatoid arthritis in its clinical
Structural components of alginic acid. II. The crystalline structure of poly-alpha-L-guluronic acid. Results of x-ray diffraction and polarized infrared studies.
E D Atkins et al.
Biopolymers, 12(8), 1879-1887 (1973-01-01)
Ramón Rial et al.
Nanomaterials (Basel, Switzerland), 10(7) (2020-07-09)
Hydrogels exhibit excellent properties that enable them as nanostructured scaffolds for soft tissue engineering. However, single-component hydrogels have significant limitations due to the low versatility of the single component. To achieve this goal, we have designed and characterized different multi-component
A dye-binding assay for the spectrophotometric measurement of transparent exopolymer particles (TEP).
Passow U and Alldredge AL.
Limnology and Oceanography, 40(7), 1326-1335 (1995)
In situ, real-time FT-IR/CIR/ATR study of the biocorrosion of copper by gum arabic, alginic acid, bacterial culture supernatant and Pseudomonas atlantica exopolymer.
Jolley JG, et al.
Applied Spectroscopy, 43(6), 1062-1067 (1989)

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