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Chondroitin-6-sulfate was oversulfated using chlorosulfonic acid–pyridine complex and isolated as the sodium salt. Infrared analysis of the native and oversulfated compound gave identical results in respect to the OH stretching, hemiacetal stretching and SO stretching. Absorption around 825cm −1 was also present in both the compounds representing the sulfate group of galactosamine at equatorial...
Kappa carrageenan was sulfated using chlorosulfonic acid–pyridine complex and isolated as the sodium salt. Infrared analysis of the native and sulfated kappa carrageenans gave identical results in respect to the O–H stretching, hemiacetal stretching and S=O stretching. Absorption around 845cm −1 was also present in both the compounds representing the sulfate at the axial C-4 position except...
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