Skip to content

Hong Fen

Unknown

Pinyin: Hong Fen Latin: Hydrargyri Oxydum Rubrum
Red Mercuric Oxide (English)

☯ TCM Properties

Category: external_applications
Temperature: neutral
Functions:

Draws out pus, removes putrid tissues and promotes the growth of new tissues

Botanical Description

Hong Fen, also called Hong Sheng Dan, is a refined mineral substance composed primarily of mercurous chloride (Hg2Cl2, calomel) and mercuric oxide (HgO), produced historically by sublimation from mercury, alum, and nitre. The product appears as bright red to orange crystalline scales or powder. In classical TCM it was used externally only, applied to chronic ulcers, abscesses, syphilitic chancres, and non-healing sores to remove necrotic tissue and promote granulation. Owing to its severe mercury toxicity and risk of systemic poisoning through skin and mucosal absorption, modern clinical practice strictly discourages internal use and limits external application to very small quantities in carefully formulated topical preparations. It is regulated as a toxic substance in the Chinese Pharmacopoeia.

Dosage

Form Amount Frequency Duration Population Notes
poultice As needed Daily

Cultural & Historical Context

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.