The following USP Reference Standards, which were not available when the associated monograph was made official, have since become available. The respective official date of each USP 30 or NF 25 standard, test, or assay requiring the use of the following USP Reference Standards is indicated in parentheses after the name of the Reference Standard.

• USP Cetrimonium Bromide RS (November 1, 2007)
• USP Cladribine RS (August 1, 2007)
• USP Cladribine Related Compound A RS (November 1, 2007)
• USP Decoquinate RS (November 1, 2007)
• USP Cryopreserved Human Fibroblast-Derived Dermal Substitute Reference Photomicrographs RS (March 1, 2008)
• USP Docosyl Ferulate RS (November 1, 2007)
• USP Ginkgo Terpene Lactones RS (March 1, 2008)
• USP Powdered American Ginseng Extract RS (November 1, 2007)
• USP Glyceryl Monolinoleate RS (March 1, 2008)
• USP Glyceryl Monooleate RS (August 1, 2007)
• USP Irbesartan RS (August 1, 2007)
• USP Irbesartan Related Compound A RS (November 1, 2007)
• USP Isosorbide Mononitrate Related Compound A RS (March 1, 2008)
• USP Polyoxyl 10 Oleyl Ether RS (August 1, 2007)
• USP Quinapril Hydrochloride RS (November 1, 2007)
• USP Tizanidine Hydrochloride RS (August 1, 2007)
• USP Human Fibroblast-Derived Temporary Skin Substitute Reference Photomicrographs RS (March 1, 2008)

Unavailable First-Time Official USP Reference Standards

The official dates of any USP 30 or NF 25 standards, tests, or assays requiring the use of the following new USP Reference Standards are postponed until further notice pending availability of the respective Reference Standards. This listing was updated as of June 20, 2007.

• USP Albumin Human RS
• USP Alteplase RS
• USP Amifostine RS
• USP Amifostine Thiol RS
• USP Antithrombin III Human RS
• USP Aprotinin RS
• USP Aprotinin System Suitability RS
• USP Copolymer Polypropylene RS
• USP Diethylstilbestrol Diphosphate RS
• USP Powdered Echinacea pallida Extract RS
• USP Eucatropine Hydrochloride RS
• USP Gonadorelin Hydrochloride RS
• USP Hemoglobin RS
• USP Isosorbide Mononitrate RS
• USP Alpha Lipoic Acid RS
• USP Maritime Pine Extract RS
• USP Menotropins RS
• USP Mibolerone RS
• USP Narasin RS
• USP Near Infrared Calibrator
• USP Pyrethrum Extract RS
• USP Powdered St John's Wort Extract RS
• USP Sargramostim RS
• USP Sincalide RS
• USP Δ⁹—Tetrahydrocannabinol RS
• USP Valrubicin RS
• USP Valrubicin Related Compound A RS
• USP Vasopressin RS