The United States Pharmacopeia (USP) has stated that references to General Chapter <911> “Viscosity” will be changed to General Chapter <911> “Viscosity—Capillary Viscometer Methods,” <912> “Rotational Rheometer Methods,” or <913> “Rolling Ball Viscometer Method.” Seventy monographs will be affected.

The changes reflect a modernized General Chapter <911> and two new proposed General Chapters <912> and <913> published in Pharmacopeia Forum 37(4) and 37(5) in 2011 and approved by the General Chapters—Physical Analysis Expert Committee.

The changes will become official Dec. 1, 2012, and will be reflected in the Second Supplement to USP 35–NF 30. A list of impacted monographs can be found on the USP website.