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Natrii Sulfas

Mang Xiao
1 #


Mang Xiao (Natrii Sulfas)——Ming Yi Bie Lu (Miscellaneous Records of Famous physicians)

  1. Mang Xiao
  2. 芒硝
  3. 朴硝
  4. Po Xiao
  5. 樸硝
  6. Mirabilitum
  7. Mirabilite

The Processing of Natrii Sulfas


The crystal refined from processed Glauber's salt of family Sulfates. The main ingredient is Na2SO4•10H2O.


Mainly in Hebei, Henan, and Shandong provinces.


Collected and refined all over the year.

The actual smell and taste

Salty, slightly bitter, cool taste.

Best quality

Strip in form, colorless, transparent.

The Effect of Natrii Sulfas


Salty, bitter, cold; stomach and large intestine meridians entered.


Soften hardness with purgative, clear heat and relieve swelling.


A. Constipation due to dryness-heat

Being bitter and cold with action of purgation and heat clearing, it excels at relaxing bowels and purging heat; while being salty with action of soften hardness, it excels at soften dry and hard stool. So it is much suitable for dry stool stagnation due to excess heat accumulation. It is often combined with Da Huang for mutually reinforcement in aspect of relaxing bowels with purgative, as in Da Cheng Qi Tang or Tiao Wei Cheng Qi Tang from Shang Han Lun.

B. Sore throat, mouth ulcer, blood-shot eyes, abscess and sores with swelling pain

It has the action of clearing heat and relieving swelling when being used topically. For interior excessive fire-heat manifested as sore throat, mouth and tongue ulcer, and gum swelling pain, it can be used singly or combined with heat-clearing, toxin-removing and abscess-curing herbs, such as Peng Sha, Bing Pian and Zhu Sha in Bing Peng San from Wai Ke Zheng Zong. For hemorrhoid with swelling pain, it can be decocted for external wash. For initial mammary abscess, it can be packed with gauze and applied externally.

Dosage and Administrations

Take infused or dissolve in water 10~15g. Proper dosage is for topical administration.


Use with caution for women during lactation for its milk regurgitation action. It's contraindicated to pregnant women.