22048

κ-Carrageenan

sulfated plant polysaccharide

• Synonym(s): Vegetable gelatin
• CAS Number: 11114-20-8
• EC Number: 234-350-2
• MDL number: MFCD00151514
• UNSPSC Code: 12352201
• NACRES: NA.25

Properties

• biological source: plant
• form: powder
• color: white to off-white
• viscosity: 5-25 mPa.s, 0.3 % in H₂O(25 °C)
• solubility: H₂O: soluble 5 mg/mL (hot)
• InChI: 1S/C24H38O25S2/c25-1-5-14(48-50(33,34)35)9(27)10(28)22(42-5)45-16-8-4-40-19(16)12(30)23(44-8)47-20-13(31)24(43-6(2-26)17(20)49-51(36,37)38)46-15-7-3-39-18(15)11(29)21(32)41-7/h5-32H,1-4H2,(H,33,34,35)(H,36,37,38)/p-2/t5-,6-,7-,8-,9-,10-,11-,12-,13-,14+,15+,16+,17+,18-,19-,20-,21+,22+,23-,24+/m1/s1
• InChI key: ZNOZWUKQPJXOIG-XSBHQQIPSA-L

Description

General description

Carrageenans are mucopolysaccharides from the cell walls of the red algae. They are anionic linear polymers composed of 1,3α-1,4β-galactans having one (κ-), two (ι-) or three (λ-) sulfates per disaccharide unit. In ionic solutions, κ- and ι-carrageenans self-associate into helical structures that form rigid or flexible gels, respectively. λ-carrageenans do not form helices and are non-gelling. Carrageenans are used commercially as thickeners and stabilizing agents.

insoluble in hot concentrated salt solutions

Application

Carrageenans are used to suppress immune response in vivo and in vitro via mechanisms believed to involve selective cytopathic effect on macrophages. As ι-, κ-, and λ-carrageenans have varying degress of sulfation, they may be studied comparatively for differences in protective, antiviral, and immunosuppression activities.

May be used in immobilization of microbial cells based on the growth of cell in gel

Other Notes

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Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 2
• flash_point_f: Not applicable
• flash_point_c: Not applicable