Section 186.1275 - Dextrans(a) Dextrans (CAS Reg. No. 9004-54-0) are high molecular weight polysaccharides produced by bacterial fermentation of sucrose. Commercially available dextrans are synthesized from sucrose by Leuconostoc mesenteroides strain NRRL B-512(F). Partial depolymerization and purification of the fermented mixture shall produce a product that is free of viable microorganisms.(b) The ingredient is used or intended for use as a constituent of food-contact surfaces.(c) The ingredient is used at levels not to exceed good manufacturing practice.(d) Prior sanctions for this ingredient different from the uses established in this section do not exist or have been waived.43 FR 29288, July 7, 1978, as amended at 48 FR 48457, Oct. 19, 1983