Muby Chemicals established in the year 1976, is pioneer in Manufacturing Chemicals for Oil and Gas Exploration, Hydraulic Fracturing (Fracking) and coiled tube Chemicals.Our advanced chemistry leading to an innovative and high-performance product range is coupled with effective on and off site management services.
We are manufacturer of Specialty chemicals, Pharmaceutical Excipients, Fragrance & Flavorchemicals in India, which are of IP, BP, USP, Ph. Eur., FCC or Food Grade, ACS, AR or Analytical Reagent Grade, LR or Laboratory Reagent Grade, Pure and Technical Grades of various chemicals.
Bismuth Citrate USP Grade
BiC6H5O7 398.08 — 813-93-4.
Bismuth Citrate contains not less than 49 percent and not more than 54 percent of bismuth (Bi).
A: Infrared Absorption 197K : on the undried specimen.
B: When strongly heated, the salt chars, and on ignition leaves a more or less blackened residue having a yellow surface. The residue is soluble in warm nitric acid, and this solution, when dropped into a large excess of water, produces a white turbidity.
C: Dissolve 1 g in ammonia. When treated with hydrogen sulfide in excess, a black precipitate is obtained. Filter this mixture, drive off the excess hydrogen sulfide by heating, and allow to cool. To a portion of this cooled solution add an excess of calcium hydroxide and boil: a white precipitate is formed. Reserve a second portion of the cooled solution for the test for Limit of nitrate.
Arsenic: the limit is 10 microgm per g.
Limit of nitrate: To the second portion of cooled solution reserved from Identification test C, add an equal volume of sulfuric acid, mix, and allow to cool. Into the liquid, drop a crystal of ferrous sulfate, and allow to stand for 30 minutes: no brown or brownish black color appears around the crystal.
Limit of copper, lead, and silver: To pass the test; 10 microgm per g.
Limit of soluble bismuth: To pass the test.
Assay: Transfer about 300 mg of Bismuth Citrate, accurately weighed, to a porcelain crucible, and ignite. Allow to cool, add 2 mL of nitric acid to the residue, drop-wise, and warm until complete solution has been effected. Add about 60 mL of water and 0.3 mL of xylenol orange and titrate with 0.05 N edetate disodium to a yellow endpoint. Each mL of 0.05 N edetate disodium is equivalent to 10.45 mg of bismuth (Bi).
For Original Monographs of IP Indian Pharmacopoeia BP British Pharmacopoeia USP US Pharmacopoeia FCC Food Grade product, please check with the respective web-pages or books.