The tariff classification of Xylitol (CAS-87-99-0); dl-รก-Tocopherol (CAS-2074-53-5); Thiamine Hydrochloride (CAS-67-03-8); Xanthan Gum (CAS-11138-66-2); and Sodium Erythorbate (CAS-6381-77-7), all imported in bulk form, from China