Powdered Cat's Claw
» Powdered Cat's Claw is Cat's Claw reduced to a powder or very fine powder. It contains not less than 0.3 percent of pentacyclic oxindole alkaloids, calculated on the dried basis, as the sum of speciophylline, uncarine F, mitraphylline, isomitraphylline, pteropodine, and isopteropodine.
Packaging and storage— Preserve in tight, light-resistant containers, and store at room temperature.
Labeling— The label states the Latin binomial and, following the official name, the part of the plant from which the article was derived.
Botanic characteristics— Presence of fragments of cork and suberized cells, with cell walls evenly thickened. Presence of phelloderm sclereids. Fragments of fibers crossed by vascular rays are darkened due to the presence of sand-like calcium oxalate microcrystals. Solitary or two- to three-compound starch grains up to 15 µm in diameter. Absence of styloids, typically present in U. guianensis.
Other requirements— It meets the requirements of the tests for Identification, Microbial enumeration, Loss on drying, Total ash, Acid-insoluble ash, Pesticide residues, Heavy metals, and Content of pentacyclic oxindole alkaloids and limit of tetracyclic oxindole alkaloids under Cat's Claw.
Auxiliary Information— Please check for your question in the FAQs before contacting USP.
Topic/Question Contact Expert Committee
Monograph Maged H. Sharaf, Ph.D.
Senior Scientist
(DSB05) Dietary Supplements - Botanicals
Reference Standards Lili Wang, Technical Services Scientist
USP32–NF27 Page 972
Pharmacopeial Forum: Volume No. 32(4) Page 1124
Chromatographic Column—
Chromatographic columns text is not derived from, and not part of, USP 32 or NF 27.