Pharmacopoeia: Guidelines for the determination of powder flowability published

• The tip of the powder cone is deformed
  by the impact of the powder coming out from the upper part.
  By carefully constructing the powder cone, the deformation of the powder cone due to impact can be minimized
• The properties that form a powder-cone chassis affect the angle of rest
  .
  It is recommended to form a powder cone on a "common chassis", which can be achieved
  by forming a powder cone on a layer of powder.
  This can be achieved
  by using a fixed diameter chassis with a protruding outer edge that retains a layer of powder on which a powder cone is formed.
  
• When measuring the fluidity of powder, the state of the tested sample will affect the measurement result, and for samples with strong hygroscopicity, small particle size and easy agglomeration, the ambient humidity may affect
  the measurement result when the ambient humidity is too high.
  Therefore, in the sample test, the sample status needs to be observed, the ambient humidity is detected and explained
  in the test report.
  

In order to ensure the scientificity, rationality and applicability of the standard, the proposed standard is now publicized to solicit opinions from all walks of life, the specific content is as follows:

Publication of Draft Standards for Guidelines for the Determination of Powder Flow - National Pharmacopoeia Commission (chp.
org.
cn)

The publicity period is 3 months
from the date of publication.
Please carefully review, if there is any objection, please submit feedback in time, with relevant instructions, experimental data and contact information
.
The relevant letter must be stamped with an official seal, and the personal letter must be signed by the person in person, and the electronic version should be sent to the designated email address
.