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9005-38-3

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Identification

Name
Sodium alginate
CAS
9005-38-3
Synonyms
ALGIN
ALGINATE SODIUM SALT
Alginic acid monosodium salt
ALGINIC ACID SODIUM SALT
ALGINIC SODIUM
FEMA 2015
POLYMANNURONIC ACID SODIUM SALT
SODIUM ALGINATE
SODIUM ALGINATE 300-400
SODIUM ALGINATE 500-600
SODIUM ALGINATE 80-120
algiline
algin(polysaccharide)
alginatekmf
algiponl-1168
amnucol
antimigrantc45
cecalginetbv
cohasal-ih
daridqh
EINECS(EC#)
905-385-3
Molecular Formula
C5H7O4COONa
MDL Number
MFCD00081310

Chemical Properties

Appearance
solid
storage temp. 
Store at RT.
form 
powder

PH
6.0-8.0 (10mg/mL in H2O)
Stability:
Stable. Incompatible with strong acids, strong bases, strong oxidizing agents.
Water Solubility 
Soluble in water. Insoluble in alcohol, chloroform and ether.
Sensitive 
Hygroscopic
Merck 
14,241
Uses
Sodium Alginate is a gum obtained as a sodium salt of alginic acid, which is obtained from seaweed. it is coldand hot-water soluble, producing a range of viscosities. it forms irreversible gels with cal- cium salts or acids. it functions as a thickener, binder, and gelling agent in dessert gels, puddings, sauces, toppings, and edible films.
Uses
Alginate is a gum derived from alginic acid that is used to provide thickening, gelling, and binding.
Uses
alginate is used as a thickening agent in cosmetic preparations. Alginate may be used as microcapsules and is obtained from marine extracts.
CAS DataBase Reference
9005-38-3(CAS DataBase Reference)
EPA Substance Registry System
9005-38-3(EPA Substance)

Hazard Information

Chemical Properties
solid

Safety Data

Hazard Codes 
Xi
Risk Statements 
R36/37/38:Irritating to eyes, respiratory system and skin .
Safety Statements 
S24/25:Avoid contact with skin and eyes .
S36:Wear suitable protective clothing .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
WGK Germany 
1

RTECS 
AZ5820000


3
TSCA 
Yes
HS Code 
39131000
Safety Profile
Poison by intravenous and intraperitoneal routes. When heated to decomposition it emits toxic fumes of Na2O
Hazardous Substances Data
9005-38-3(Hazardous Substances Data)

Raw materials And Preparation Products

Material Safety Data Sheet(MSDS)

Questions and Answers (Q&A)

Description
Sodium alginate is the sodium form of alginate. Alginate is a linear, anionic polysaccharide consisting of two form of 1, 4-linked hexuronic acid residues, β-d-mannuronopyranosyl (M) and α-l- guluronopyranosyl (G) residues. It can be arranged in the form of blocks of repeating M residues (MM blocks), blocks of repeating G residues (GG blocks), and blocks of mixed M and G residues (MG blocks). Commercially available alginate currently originates from algae. Alginate has wide applications. For example, one of its most important role is being used as wound dressing materials for the treatment of acute or chronic wounds. The use of alginate crosslinking to make hydrogels for cell encapsulation is also quite valuable. The emergence of various kinds of its derivatives recently has further extended its application.
History
Sodium alginate is a natural polysaccharide product that was first described in a patent application by the British chemist Edward C C Stanford in 1881. To this day brown algae are still the main source used to extract sodium alginate from. This group includes many of the seaweeds, like kelps, found in chilly northern seas. In addition to the food industry, the gelling properties of sodium alginate have been used in medical, dental and cosmetic applications for years.
Uses
  1. Sodium alginate can be used as a flavorless gum. It is used by the foods industry to increase viscosity and as an emulsifier. It is also used in indigestion tablets and the preparation of dental impressions.
  2. Sodium alginate (NaAlg) and its modified forms have been widely used as membranes in pervaporation (PV) separation of aqueous‐organic solutions because of the hydrophilic nature and versatility to modify/tune their structures to achieve the desired separation.
  3. Sodium alginate is a polymer which can be extracted from brown seaweed and kelps. It is one of the structural polymers that help to build the cell walls of these plants. It has some unusual properties and a wide variety of uses.
    The polymer can be represented like this:
    Sodium alginate
    When sodium alginate is put into a solution of calcium ions, the calcium ions replace the sodium ions in the polymer. Each calcium ion can attach to two of the polymer strands. This is called cross-linking and can be represented like this:
    Calcium alginate

References
Pawar, Siddhesh N., and Kevin J. Edgar. Biomaterials 33.11 (2012): 3279-3305. Yang, Ji-Sheng, Ying-Jian Xie, and Wen He. Carbohydrate polymers 84.1 (2011): 33-39.

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