As a fast growing company, we are providing our customers with safer and greener products with specialized manufacturing technology and high quality Povidone Xl-10, N-vinylpyrrolidone Polymerization, Crospovidone European Pharmacopoeia Monograph. We should strive to improve the talent development mechanism and provide more fair development opportunities for outstanding talents. We are committed to establishing a corporate image, improving the quality of employees, increasing brand awareness, and providing good services to domestic and foreign customers with a scientific management model. We are striving to become an innovative enterprise by stimulating the growth and vitality with innovation and maintaining the leading edge with innovation. As a modern new enterprise, our company has introduced advanced automatic manufacturing equipment from abroad, and has an efficient management system.

Preparation:

Preparation of povidone iodine usp: Take an appropriate amount of PVP in a mortar, moisten it with absolute ethanol, grind it evenly, transfer it to an iodine bottle, take the iodine that has been pulverized in advance, and put it into the iodine bottle. Add enough absolute ethanol, adjust the pH to 6~7, ultrasonicate for 15min, wait until all the iodine is dissolved, transfer the solution to a beaker, and evaporate to dryness.

Examination

Loss on drying:

Take about 5g of this product, accurately weigh it, dry it at 105°C for 4 hours, weigh it, and then continue to dry it for 1 hour and then weigh it until the difference in weight after two consecutive dryings does not exceed 5.0mg; lose weight No more than 8.0%.

Residue on ignition:

Take 1.0g of this product and inspect according to law. The remaining residue shall not exceed 0.1%.

Heavy metal:

Take the residue left over under the item of residue on ignition and inspect it in accordance with the law, and the content of heavy metals shall not exceed 20 parts per million.

Arsenic:

Take 1.3g of this product, add 0.5g of calcium hydroxide, mix well, add an appropriate amount of water (about 2ml), stir evenly, after drying, first burn with a small fire to carbonize, then burn at 600℃ to completely ash, and let it cool. , Add 5ml of hydrochloric acid and 23ml of water, check according to law, should meet the regulations (0.00015%).

Nitrogen content:

Take about 0.50g of this product, accurately weigh it, and determine it according to the nitrogen determination method. Calculated as dry product, the nitrogen content should be 9.5%~11.5%.

Iodide:

Take about 0.50g of this product, accurately weigh it, put it in a 250ml conical flask, add 100ml of water to dissolve, add a few drops of sodium bisulfite test solution to make the solution color disappear, add 10ml of nitric acid, and precisely add silver nitrate titrant mol/L) 25ml, after shaking well, add 0.5ml ferric ammonium sulfate indicator solution, titrate with ammonium thiocyanate titrant (0.1mol/L) until the solution is light brick red, and correct the titration result with a blank test. Each 1ml silver nitrate titrant (0.1mol/L) is equivalent to 12.69mg of I. The calculated percentage of total iodine minus the percentage of available iodine under the content determination item is the percentage of iodide ion. Calculated as dry product, the iodine ion content shall not exceed 6.6%

We provide our customers with high-quality Factory Supply Best Selling CAS 7553-56-2 Povidone Iodine Crystal and continue to introduce technological innovation and advanced equipment. Our company has a large-scale R & D and production base, advanced production machinery and equipment and a group of professional management and technical personnel. We will keep pace with the times, continue to innovate, and give full play to the company's resource advantages and market advantages.

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