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Alternate English names: mirabilite efflorescence Glauber’s salt efflorescence

Alternate Chinese names: 白龙粉 bái lóng fěn; 风化硝 fēng huā xiāo; 元明粉 yuán míng fěn; 风化硝 fēng huà xiāo

Kingdom: Mineral

Origin in PRC Pharmacopoeia: Xuán míng fěn is mangxiao that has undergone further refinement.

Origin in unofficial sources: Xuán míng fěn is mangxiao that has undergone further refinement.

Use: Medicinal

Category: Draining-precipitation agents / Offensive precipitant agents

Properties: Acrid and salty; cold.

Channel entry: Stomach and large intestine channels.

Actions and indications: Drains heat and frees the stool; moistens dryness and softens hardness; clears heat and resolves toxin. Has the same action as Máng xiāo (芒硝 Natrii Sulfas , mirabilite) but is a milder draining precipitant. Treats repletion heat accumulation and stagnation; fecal stoppage; painful red swollen eyes; painful swollen throat; mouth sores; toxin swelling of welling- and flat-abscesses (yōng jū).

Dosage and method: Oral: Dissolve in decoctions (4.5–9g) or use in pills, powders. Topical: Insufflation into the mouth and throat; eye drops.

Notes: This item is mirabilite treated by heating or efflorescence.

Product description: Takes the form of a loose white powder that dissolves in water.

Etymology: The name xuán míng fěn 玄明粉 is explained as powder that is crystal clear as water, 玄 being understood to mean the color of water, and 明粉 meaning clear powder.

See: Máng xiāo (芒硝 Natrii Sulfas , mirabilite)

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