The philosophy that quality is the life of the company is the driving force behind our continuous improvement and pursuit of perfect quality for our Pvp K 17, Povidone K30, Crospovidone Nf. We strive to be strong to promote the development of the industry and the progress of society and contribute our due strength based on the local, facing the world. Our professional advantages, advanced management philosophy, and financial strength provide unparalleled growth platforms and opportunities for our talents.

PVP 90 check

1.N-vinylpyrrolidone

Take 10.0g of this product (calculated as anhydrous), add 80ml of water to dissolve it, add lg of sodium acetate, precisely add 10ml of iodine titration solution (0.05mol/L), leave it for 10 minutes, and use sodium thiosulfate titration solution (O. 1mol/L) Titration. When it is near the end point, add 2ml of starch indicator solution, continue titration until the blue color disappears, and correct the result of the titration with a blank test. The consumption of iodine titrant (0.05mol/L) shall not exceed 3.6ml.

2.Moisture

Take this product and measure it according to the moisture determination method (General Rule 0832), and the moisture content shall not exceed 5.0%.

3.Residue on ignition

Take l.Og of this product and inspect according to law (General Rule 0841), and the remaining residue shall not exceed 0.1%.

4.Heavy metal

Take the residue left under the item of residue on ignition and inspect it according to law (General Rule 0821 Law 2), and the content of heavy metals shall not exceed 10 parts per million.

5.Nitrogen content

Take this product about 0.1g, accurately weigh it, place it in a Kjeldahl nitrogen bottle, add potassium sulfate log and 0.5g copper sulfate in sequence, slowly add 20ml sulfuric acid along the bottle wall, and place one at the mouth of the Kjeldahl nitrogen bottle In a small funnel, use a straight fire to slowly heat until the solution turns into a clear green, continue heating for 30 minutes, and let it cool. Transfer to a 100ml measuring flask, add water to dilute to the mark, and shake well. Precisely draw 10ml, measure according to the nitrogen determination method (General Principle 0704 Method 2), titrate the distillate with sulfuric acid titrant (0.005mol/L), and calibrate the titration result with a blank test. Calculated as anhydrous, the nitrogen content should be 11.5%~12.8%.

We always get the job done to be a tangible staff to ensure that we can easily offer you the best high-quality and the greatest value for 1-Methyl-2-Pyrrolidone; N-Methyl-2-Pyrrolidone; N-Methyl Pyrrolidone (NMP) CAS No.: 872-50-4. We will strive to create a corporate atmosphere that is not only conducive to the career development of employees, but also helps to achieve personal life goals. 'Meet the real needs of customers and strive to exceed customer expectations' is our guiding ideology for providing products and services to customers. To uphold this belief, we have been working tirelessly. We are full of enthusiasm and look forward to your cooperation to create a better tomorrow!

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