铋subcarbonate（医疗）

1.main characteristic: Traits:light yellow powder Name:bismuth subcarbonate stanard:USP29 function:antiacid,curing stomach illness. stomach Assay:96.7% medicine for stomach illness Identification: Fine white to pale yellow-white powder, Odorless,insoluble in water and alcohols, Soluble in nitric acid, hydrochloric acid and strong aceticacid. Conforms Identification: It responds to the test for bismuth(191) Conforms And for carbonate(191) Loss on drying: Max 1% 0.3%Chlorid: Max 0.05%conforms Limit of alkalies And alkaline earthsMax1.0% 0.7% Limit of nitrate:Max 0.4% less than 0.4% Limit of silver:Max0.005% Conforms Arsenic: Max 5 ppm Conforms Limit of Copper:Max0.005% less than 0.005% Limit lead: Max0.002% less than 0.002% Assay(Bio2CO3): not less than 97.6%and not more than100.7% 100.1% Conlusion:conforms to USP29