Powdered Stinging Nettle
» Powdered Stinging Nettle is Stinging Nettle reduced to a fine or very fine powder. It contains not less than 0.8 percent of total amino acids, not less than 0.05 percent of -sitosterol (C29H50O), and not less than 3 µg per g of scopoletin (C10H8O4), calculated on the dried basis.
Packaging and storage— Preserve in tight containers, protected from light and excessive heat.
Labeling— The label states the Latin binomial and, following the official name, the parts of the plant contained in the article.
Botanic characteristics— [note—The test is carried out under a microscope using chloral hydrate solution.] The powder is yellowish to brownish gray, and shows several fragments of net and pitted vessels with a strongly varying diameter, usually between 50 and 150 µm. Few, if any, pitted bast fibers are present. Clearly pitted wood fibers, about 200 to 800 µm in length, and thin-walled parenchyma cells, sometimes containing compounded calcium oxalate crystals and occasionally with single crystals and fragments of cork consisting of flat-shaped, thin-walled cells, are also present.
Other requirements— It meets the requirements of the tests for Identification, Microbial enumeration, Foreign organic matter, Total ash, Pesticide residues, Content of total amino acids, Content of -sitosterol, and Content of scopoletin under Stinging Nettle.
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 1061
Pharmacopeial Forum: Volume No. 29(4) Page 1289
Chromatographic Column—
Chromatographic columns text is not derived from, and not part of, USP 32 or NF 27.