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Monographs Affected by Revision to <855> Nephelometry, Turbidimetry, and Visual Comparison

Type of Posting: Notice of Intent to Revise
Posting Date: 5–Oct–2018
Targeted Official Date: 1–May–2019
Expert Committee: Various

In accordance with section 7.05(c) of the 2010–2015 Rules and Procedures of the Council of Experts, this is to provide notice that USP and its Expert Committees, as applicable, intend to revise multiple monographs in response to the revision of General Chapter <855> Nephelometry, Turbidimetry, and Visual Comparison.

General Chapter <855> was proposed for revision in Pharmacopeial Forum 43(5), and the revised chapter will be official in USP 42–NF 37. USP has identified several monographs that reference General Chapter <855> and thus require revision to update these references in the same publication. Some cross references to <855> were changed to <630> as part of this revision.  A list of the monographs that will be modified can be found here.

All revisions will become official on May 1, 2019, to coincide with the official date of revised General Chapter <855>.

Please also see the Compendial Notice: New Revision Markup for Reference Changes in USP–NF for details on the revision markup used to identify the reference updates.

Interested stakeholders are encouraged to alert USP staff to any impact they may recognize related to the update of those monographs.

Should you have any questions or comments, please contact Edmond Biba, Scientific Liaison-General Chapters (301-230-3270 or, or the affected monograph’s liaisons.