Dries Dampness and stops discharge — excessive leucorrhea, diarrhea, dysentery, and sweating; astringent action through Al³⁺ ion binding to mucosal proteins; functionally identical to Bai Fan (herb #96) — same compound, same indications
Resolves toxicity and kills parasites — external use for tinea, scabies, trichomonas vaginitis, and infected skin ulcers; topical antiseptic and antifungal
Stops bleeding — haemostatic for haemoptysis, haematuria, and uterine bleeding from Heat patterns; astringent-cold action contracts bleeding surfaces
Transforms Phlegm and opens orifices — combined with Zhu Dan for Phlegm-type epilepsy; classical two-herb formula Bai Fan San shared between both names
Secondary Actions
Topical astringent for haemorrhoids — Ming Fan solution or Ku Fan (calcined form) powder applied to haemorrhoid tissue; contracts and desiccates prolapsed tissue
Gargle solution for throat and mouth — dilute Ming Fan solution used as astringent gargle for aphthous ulcers and pharyngitis; antiseptic and anti-inflammatory on mucous membranes
Classic Formulas
Bai Fan San (白矾散) — Ming Fan combined with Zhu Dan (pig bile) for Phlegm-type epilepsy; Ming Fan is the common commercial market name used interchangeably with Bai Fan in pharmacy dispensing
Ming Fan external wash — 3–5% Ming Fan solution used as topical soak or compress for tinea pedis, weeping eczema, and haemorrhoids; Ming Fan is the preferred name for topical preparations in contemporary Chinese pharmacy
Classical References
SYNONYM NOTE: Ming Fan (明矾, 'bright/clear alum') is the standard commercial market name for potassium aluminum sulfate KAl(SO₄)₂·12H₂O in modern Chinese pharmacy and food industry — synonymous with Bai Fan (白矾, 'white alum', herb #96); both names refer to the same mineral drug Alumen; the XLSX source filed both as separate entries reflecting two commonly used names; in clinical dispensing they are interchangeable; Ming Fan is the name typically used on commercial packaging and in food applications (where alum was historically used as a baking leavener and food firming agent), while Bai Fan is more common in TCM materia medica texts
Ben Cao Hui Yan (Ni Zhumo, 1624 CE): notes Ming Fan (明矾) as equivalent to Bai Fan in action — 'the name Ming (bright/clear) refers to the transparent crystals; the two names refer to the same stone with identical medicinal properties'
Modern Research
Active Compounds
Potassium aluminum sulfate dodecahydrate — KAl(SO₄)₂·12H₂O; identical to Bai Fan (herb #96)
Aluminum ion (Al³⁺) — astringent, antiseptic, protein-precipitating
Sulfate ion — desiccant, antibacterial
Studied Effects
Antimicrobial: identical to Bai Fan (herb #96); alum solutions inhibit dermatophytes, Candida, and common skin bacteria; mechanism: protein precipitation and pH reduction at treatment site
Astringent and haemostatic: Al³⁺ ions cross-link mucosal proteins causing vasoconstriction and reduced secretion; the mechanism is identical to Bai Fan and validated across multiple in vitro and clinical studies on alum preparations
Safety & Interactions
Contraindications
Spleen-Stomach Deficiency Cold — cold, astringent nature; avoid internal use in deficiency Cold patterns
Yin Deficiency without Damp accumulation — astringency inappropriate without pathological Dampness
Cautions
Standard internal dose: 0.6–1.5 g in pill or powder; short-term use only; avoid prolonged internal use due to aluminum accumulation risk
Ming Fan is also used as a food additive (E521 potassium alum) in fried dough and baked goods in China — dietary aluminum exposure from these sources adds to any therapeutic intake; consider cumulative exposure
External use is well-tolerated at 2–5% solutions; Ku Fan (calcined alum) powder used topically for skin conditions without significant systemic absorption
See Bai Fan (herb #96) for complete safety profile — identical substance