Natural Herb Library

Xuan Ming Fen

Chinese
玄明粉
Pinyin
Xuan Ming
Latin
Natrii Sulfas Exsiccatus
Scientific specimen plate of Sodium Sulfate, Natrii Sulfas, showing refined Xuan Ming material and diagnostic mineral details.
Botanical plate by Kodi .

Known in TCM as Xuan Ming (玄明粉), this acrid and bitter and salty, cold herb enters the Stomach, Large Intestine, and Lung. Traditionally, it purges heat and softens hardness ... Xuan Ming Fen is the refined sodium-sulfate lane used for severe heat constipation, dry stool, and abdominal fullness, most often applied for constipation, sore throat, and mouth sores. Modern research has identified Refined among its active constituents.

Part used: Sodium salt

Also Known As

Sodium Sulfate Refined Mirabilite Xuan Ming Fen Sulfas

Latin: Natrii Sulfas Exsiccatus | Pinyin: Xuan Ming | Chinese: 玄明粉

TCM Properties

Taste
acrid, bitter, salty
Temperature
cold
Channels
Stomach, Large Intestine, Lung

Traditional Use

Primary Actions

  • Purges heat and softens hardness ... Xuan Ming Fen is the refined sodium-sulfate lane used for severe heat constipation, dry stool, and abdominal fullness.
  • Clears swelling and fire toxicity externally ... traditional use includes sore throat, mouth ulcers, and other hot swollen lesions.
  • Moistens dryness while draining downward ... the refined powder form is historically treated as part of the Mang Xiao family but with a narrower and often cleaner medicinal presentation.

Secondary Actions

  • This page preserves the inherited shorter-name `Xuan Ming` lane and should stay aligned with the already-live `exsiccated-sodium-sulfate` record rather than treated as a separate mineral universe.
  • Traditional discussions usually place Xuan Ming Fen within the mirabilite lineage rather than outside it.

Classic Formulas

  • Tiao Wei Cheng Qi Tang ... bowel heat with dryness that benefits from moistening purgation.
  • Da Cheng Qi Tang ... major heat accumulation with hardness and constipation.
  • Bing Peng San and related topical heat-clearing powders ... external throat and mouth lesion use.

Classical References

  • Later materia medica describe Xuan Ming Fen as the refined or weathered mirabilite form used internally for bowel heat and externally for fire-toxic swelling.
  • The shorter inherited pinyin on this page points to the same classical medicinal family as Xuan Ming Fen.

Modern Research

Active Compounds

  • Refined sodium sulfate mineral salts
  • Mirabilite-derived sulfate chemistry
  • Hyperosmotic saline fractions

Studied Effects

  • A 2023 mirabilite review remains the clearest modern summary of the Xuan Ming Fen lineage, including processing, pharmacology, toxicology, and clinical application (PMID 38239194).
  • A pediatric multicenter randomized trial supported external mirabilite use in preventing post-ERCP pancreatitis, illustrating how the refined mirabilite family still appears in contemporary clinical research (PMID 37206074).
  • Postoperative gastrointestinal-motility work also supports continuing clinical interest in mirabilite-derived mineral therapy beyond its classical constipation setting (PMID 33230937).

PubMed References

Safety & Interactions

Contraindications

  • Pregnancy
  • Diarrhea, dehydration, or marked Spleen-Stomach deficiency cold
  • Intestinal obstruction or acute undiagnosed abdominal pain
  • Frailty or electrolyte instability without supervision

Cautions

  • Xuan Ming Fen is still a strong saline purgative despite the refined presentation.
  • Internal overuse can worsen dehydration and electrolyte loss.
  • Topical use for mouth or throat lesions does not justify casual internal use.

Drug Interactions

  • Other laxatives or bowel-preparation agents ... additive cathartic and dehydration effects
  • Drugs affected by dehydration or electrolyte loss ... indirect risk from excessive purgation

Conditions

Frequently Asked Questions

What is Xuan Ming Fen used for?

Xuan Ming Fen is traditionally used to Purges heat and softens hardness ... Xuan Ming Fen is the refined sodium-sulfate lane used for severe heat constipation, dry stool, and abdominal fullness., Clears swelling and fire toxicity externally ... traditional use includes sore throat, mouth ulcers, and other hot swollen lesions., Moistens dryness while draining downward ... the refined powder form is historically treated as part of the Mang Xiao family but with a narrower and often cleaner medicinal presentation.. Research has investigated its effects on: A 2023 mirabilite review remains the clearest modern summary of the Xuan Ming Fen lineage, including processing, pharmacology, toxicology, and clinical application (PMID 38239194).; A pediatric multicenter randomized trial supported external mirabilite use in preventing post-ERCP pancreatitis, illustrating how the refined mirabilite family still appears in contemporary clinical research (PMID 37206074)..

What are other names for Xuan Ming Fen?

Xuan Ming Fen is also known as Sodium Sulfate, Refined Mirabilite, Xuan Ming Fen, Sulfas. In TCM: 玄明粉 (Xuan Ming); Natrii Sulfas Exsiccatus.

Is Xuan Ming Fen safe during pregnancy?

Xuan Ming Fen is not recommended during pregnancy.

What are the contraindications for Xuan Ming Fen?

Xuan Ming Fen should not be used in: Pregnancy; Diarrhea, dehydration, or marked Spleen-Stomach deficiency cold; Intestinal obstruction or acute undiagnosed abdominal pain; Frailty or electrolyte instability without supervision. Consult a qualified practitioner before use.

Does Xuan Ming Fen interact with any medications?

Xuan Ming Fen may interact with: Other laxatives or bowel-preparation agents ... additive cathartic and dehydration effects; Drugs affected by dehydration or electrolyte loss ... indirect risk from excessive purgation. Always inform your healthcare provider of any herbal supplements you are taking.