| http://www.w3.org/ns/prov#value | - It is desirable that (a212) has a small unsaturation degree (0.1 meq/g or smaller, preferably 0.05 meq/g or smaller, particularly preferably 0.02 meq/g or smaller), and it is desirable that (a212) has a content of a primary hydroxyl group of at least 30%, preferably at least 50%, particularly preferably at least 70%.
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