Beside the type of substitution (type of etherification agent used), the degree of substitution considerably influences the properties of CELOPRO and is characterized by two parameters:
Average Degree of Substitution (DS)
The DS indicates how many hydroxyl groups of an anhydroglucose unit are etherified on average. The DS can have values between 0 and 3 and indexing can specify which substituent the indication relates to.
Molar Degree of Substitution (MS)
During the hydroxyethythylation, multiple substitution results in the development of side chains. The MS quantitfies the average number of hydroxyethyl or hydroxypropyl groups per anhydrogucose unit. The MS, in contrast to the DS, can have values of >3. As with the Ds, indexing can specify which sbustituent the indication relates to.