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.
http://www.usp.org/usp-nf/notices/general-chapter-viscosity-reference-corrections-monographs