Hei Xi
Plumbum (derived from Galena, PbS)
☯ TCM Properties
Descends Qi; Descends Qi and Transforms Phlegm; Expels Parasites; Resolves Toxicity; Subdues Floating Yang
Botanical Description
Hei Xi is the traditional Chinese pharmacopoeial name for metallic lead, historically prepared by smelting the sulfide ore galena (PbS). Pure lead is a soft, dense, malleable post-transition metal with a bluish-white color on a fresh cut that quickly tarnishes to a dull greyish patina on exposure to air. It has a density of about 11.34 g/cm3, a low melting point of 327 degrees Celsius, and is extremely heavy for its size; it can be cut with a knife and leaves a grey mark when rubbed on paper. The metal is highly resistant to corrosion in moist air owing to a protective oxide-carbonate film. Lead and all of its compounds are cumulatively toxic to the nervous, hematopoietic, and renal systems; modern practice strongly discourages any internal medicinal use.
Dosage
| Form | Amount | Frequency | Duration | Population | Notes |
|---|---|---|---|---|---|
| decoction | 9-30g | Daily | — | — | — |
Cultural & Historical Context
Traditional Chinese Uses
Hei Xi (black tin, stannum) is a warm, heavy metallic substance used in Chinese medicine as a profound Kidney Yang tonic that anchors Qi and descends rebellious Qi from the Lungs. It is used for the most severe patterns of Kidney Yang deficiency where Kidney Qi fails to grasp and anchor Lung Qi — resulting in chronic wheezing, breathlessness, and the sensation of Qi rushing upward. As a heavy metal, it requires careful processing and professional administration and is used in pill form, never decocted.
Traditional American Uses
None Documented
Important Disclaimer
This information is for educational purposes only and is not intended to replace professional medical advice. Always consult a qualified healthcare provider before using any herbal remedy, especially if you are pregnant, nursing, or taking medications.