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Alginic acid information


Alginic acid
Names
Other names
Alginic acid; E400; [D-ManA(β1→4)L-GulA(α1→4)]n
Identifiers
CAS Number
  • 9005-32-7 checkY
ChemSpider
  • None
ECHA InfoCard 100.029.697 Edit this at Wikidata
EC Number
  • 232-680-1
E number E400 (thickeners, ...)
UNII
  • 8C3Z4148WZ ☒N
CompTox Dashboard (EPA)
  • DTXSID601010868 Edit this at Wikidata
Properties
Chemical formula
(C6H8O6)n
Molar mass 10,000 – 600,000
Appearance White to yellow, fibrous powder
Density 1.601 g/cm3
Acidity (pKa) 1.5–3.5
Pharmacology
ATC code
A02BX13 (WHO)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
Macrocystis pyrifera, the largest species of giant kelp

Alginic acid, also called algin, is a naturally occurring, edible polysaccharide found in brown algae. It is hydrophilic and forms a viscous gum when hydrated. With metals such as sodium and calcium, its salts are known as alginates. Its colour ranges from white to yellowish-brown. It is sold in filamentous, granular, or powdered forms.

It is a significant component of the biofilms produced by the bacterium Pseudomonas aeruginosa, a major pathogen found in the lungs of some people who have cystic fibrosis.[1] The biofilm and P. aeruginosa have a high resistance to antibiotics,[2] but are susceptible to inhibition by macrophages.[3]

  1. ^ Davies, JC (2002). "Pseudomonas aeruginosa in cystic fibrosis: pathogenesis and persistence". Paediatric Respiratory Reviews. 3 (2): 128–34. doi:10.1016/S1526-0550(02)00003-3. ISSN 1526-0542. PMID 12297059.
  2. ^ Boyd, A; Chakrabarty, AM (1995). "Pseudomonas aeruginosa biofilms: role of the alginate exopolysaccharide". Journal of Industrial Microbiology. 15 (3): 162–8. doi:10.1007/BF01569821. ISSN 0169-4146. PMID 8519473. S2CID 42880806.
  3. ^ Leid, JG; Willson, CJ; Shirtliff, ME; Hassett, DJ; Parsek, MR; Jeffers, AK (1 November 2005). "The exopolysaccharide alginate protects Pseudomonas aeruginosa biofilm bacteria from IFN-gamma-mediated macrophage killing" (PDF). Journal of Immunology. 175 (11): 7512–8. doi:10.4049/jimmunol.175.11.7512. ISSN 0022-1767. PMID 16301659. S2CID 1011606.

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Alginic acid

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Alginic acid, also called algin, is a naturally occurring, edible polysaccharide found in brown algae. It is hydrophilic and forms a viscous gum when hydrated...

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Calcium alginate

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"Alginate" is usually the salts of alginic acid, but it can also refer to derivatives of alginic acid and alginic acid itself; in some publications the...

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Brown algae

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algae, and is not found in land plants. Alginic acid can also be used in aquaculture. For example, alginic acid enhances the immune system of rainbow trout...

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Mannuronic acid

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acid is a uronic acid monosaccharide that can be derived from mannose. Along with l-guluronic acid, d-mannuronic acid is a component of alginic acid,...

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Guluronic acid

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d-mannuronic acid. Along with d-mannuronic acid, l-guluronic acid is a component of alginic acid, a polysaccharide found in brown algae. α-L-Guluronic acid has...

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Gastroesophageal reflux disease

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inhibitors, H2 receptor blockers and antacids with or without alginic acid. The use of acid suppression therapy is a common response to GERD symptoms and...

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Propylene glycol alginate

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E number E405. Chemically, propylene glycol alginate is an ester of alginic acid, which is derived from kelp. Some of the carboxyl groups are esterified...

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Thickening agent

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starches, pectins and agar-agar or proteins such as gelatin. Examples are: Alginic acid (E400), sodium alginate (E401), potassium alginate (E402), ammonium alginate...

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Mozuku

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Tako, S. Kiyuna, S. Uechi, F. Hongo: Isolation and characterization of alginic acid from commercially cultured Nemacystus decipiens (Itomozuku). Biosci Biotechnol...

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Laminaria digitata

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is harvested offshore of France and Morocco for use in manufacturing alginic acid. It is used as an ingredient in some cosmetics. It was traditionally...

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Antacid

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ingredients such as simethicone to control gas, or alginic acid to act as a physical barrier to acid. Several liquid antacid preparations are marketed...

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Alginate dressing

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produced from the calcium and sodium salts of alginic acid, a polysaccharide comprising mannuronic and guluronic acid units. Alginate is initially extracted...

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Saccharina japonica

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dasima-cha (kelp tea). Cheonsa-chae (kelp noodles) is made from the alginic acid from dasima. One of Nongshim's instant noodle, the Korean original versions...

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Carrageenan

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and on any subsequent metabolites. Agar List of food additives Pectin Alginic acid Yegappan, Ramanathan; Selvaprithiviraj, Vignesh; Amirthalingam, Sivashanmugam;...

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Tapioca pearl

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kinds of Taiwanese starch additives that contained maleic acid were discovered. Maleic acid, when ingested, is known to induce kidney damage. An experiment...

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Cream

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carrageenan, gelatine, sodium bicarbonate, tetrasodium pyrophosphate, and alginic acid.: 296  Other processing may be carried out. For example, cream has a...

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Algae

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agar. Alginic acid, or alginate, is extracted from brown algae. Its uses range from gelling agents in food, to medical dressings. Alginic acid also has...

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Polymannuronate hydrolase

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D-mannuronide linkages of polymannuronate. This enzyme does not act on alginic acid, which is a copolymer of polymannuronate. Dunne WM, Buckmire FL (September...

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Reflux suppressant

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combat oesophageal reflux. Commonly, following ingestion a 'raft' of alginic acid is created, floating on the stomach contents by carbon dioxide released...

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Cell wall

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as in the walls of some red algae, like Porphyra and Bangia. Xylans: Alginic acid: It is a common polysaccharide in the cell walls of brown algae. Sulfonated...

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Natural gum

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seaweeds Polyelectrolytes Agar E406 obtained from seaweeds Polyelectrolytes Alginic acid E400 obtained from seaweeds Polyelectrolytes Sodium alginate E401 obtained...

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Azotobacter

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biofertilizers such as azotobacterin. They are also used in production of alginic acid, which is applied in medicine as an antacid, in the food industry as...

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Selman Waksman

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of bacteria in nutrient cycles. Waksman examined the degradation of alginic acid, cellulose, and zooplankton. Waksman, working with Cornelia Carey, Margaret...

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Heparinoid

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injections are correlated with increased risk of serious side effects. Alginic acid functions as a heparinoid when it is sulfated. Pentosan from the bark...

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Laminarid

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Laminarid is a blend of polysaccharides, proteins and salts of alginic acid obtained from sea cabbage (Laminariae thalli[citation needed]). It is an osmotic...

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List of food additives

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thickener, vegetable gum, stabilizer, gelling agent Alcohol – Alfalfa – Alginic acid – thickener, vegetable gum, stabilizer, gelling agent, emulsifier Alitame...

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International Numbering System for Food Additives

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phytic acid preservative 399 U calcium lactobionate stabilizer 400 A E U alginic acid thickener, vegetable gum, stabilizer, gelling agent, emulsifier 401 A...

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Kelp noodles

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Angel noodles Type Noodles Region or state East Asia Main ingredients Alginic acid from kelp Food energy (per 4 ounces (110 g) serving) 6[citation needed] kcal...

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