How to test Phenacetin powder?

As a manufacturer of phenacetin, we recommend that customers with detection capability use professional detection methods like us, such as HPCL, and select the wavelength of 254 to detect the purity of the product.
Of course, there are also some tests, such as HNMR and MS.

If you have the ability to test customers, hope to use professional testing methods to test the purity of products, welcome to communicate with me more about the details of the test
Here are the test results of our latest batch.

Of course, there will be some customers who do not have the ability to detect. If we also want to know the quality of products, we can take simple detection methods.
That is to burn phenacetin and wait for it to cool and crystallize. If it is a poor quality phenacetin powder, the crystal color will be brown.
The following is our combustion test according to the requirements of customers, the results show that the powder color is still very white after recrystallization