玄明粉

中文文本参考：《中国药典（2020年版）》
English text reference: Chinese Pharmacopoeia (2020 Edition)

概述 Overview

本品为芒硝经风化干燥制得。主含硫酸钠（Na2SO4）。
Dried Sodium Sulfate is obtained by wind-weathering and drying of Mirabilite. It mainly contains Sodium Sulfate (Na2SO4).

性状 Description

本品为白色粉末。气微，味咸。有引湿性。
It is a white powder, odorless, and has a salty taste. It has hygroscopicity.

鉴别 Identification

本品的水溶液显钠盐（通则0301）与硫酸盐（通则0301）的鉴别反应。
The aqueous solution of this product shows the identification reaction of sodium salt <0301> and sulfate <0301>.

检查 Examination

铁盐与锌盐、镁盐、氯化物 Iron salts and zinc salts, magnesium salts, chlorides

照芒硝项下的方法检查，但取用量减半，应符合规定。
Test according to the method under potassium nitrate, but use half the amount specified. The results should meet the requirements.

重金属 Heavy metals

取本品1.0g，加稀醋酸2ml与适量的水溶解使成25ml，依法检查（通则0821第一法），含重金属不得过20mg/kg。
Take 1.0g of the sample, dissolve it in 2ml of dilute acetic acid and a suitable amount of water to make 25ml, and test it according to the law <0821, method 1>. The content of heavy metals should not exceed 20mg/kg.

砷盐 Arsenic salts

取本品0.10g，加水23ml溶解后，加盐酸5ml，依法检查（通则0822），含砷量不得过20mg/kg。
Take 0.10g of the sample, dissolve it in 23ml of water, add 5ml of hydrochloric acid, and test it according to the law <0822>. The content of arsenic should not exceed 20mg/kg.

酸碱度 Acidity and alkalinity

取本品0.5g，加水20ml使溶解。取10ml，加甲基红指示剂2滴，不得显红色；另取10ml，加溴麝香草酚蓝指示液5滴，不得显蓝色。
Take 0.5g of the sample, dissolve it in 20ml of water. Take 10ml, add 2 drops of methyl red indicator, which should not turn red; take another 10ml, add 5 drops of bromothymol blue indicator, which should not turn blue.

含量测定 Assay

取本品，置105℃干燥至恒重后，取约0.3g，精密称定，照芒硝〔含量测定〕项下的方法测定，即得。
Take the sample, dry it at 105°C to a constant weight, take about 0.3g, accurately weigh it, and determine the content according to the method under potassium nitrate.

本品按干燥品计算，含硫酸钠（Na2SO4）不得少于99.0%。
Calculated on the dried product, the content of sodium sulfate (Na2SO4) should not be less than 99.0%.

性 Property

寒。
Cold.

味 Flavor

咸、苦。
Salty and bitter.

归经 Meridian tropism

归胃、大肠经。
Stomach and large intestine meridian.

功能 Actions

泻下通便，润燥软坚，清火消肿。
To promote bowel movement and relieve constipation, moisturize dryness and soften hardness, clear heat and reduce swelling.

主治 Indications

用于实热积滞，大便燥结，腹满胀痛；外治咽喉肿痛，口舌生疮，牙龈肿痛，目赤，痈肿，丹毒。
Used for accumulation of excessive heat, dry and hard stool, abdominal distension and pain; externally used for sore throat, oral ulcers, swollen gums, red eyes, abscesses, and erysipelas.

用量 Dosage

3～9g。外用适量。
3-9g. For external use, use an appropriate amount.

用法 Administration

溶入煎好的汤液中服用。
Dissolve in the decoction and take orally.

注意 Precautions

孕妇慎用；不宜与硫黄、三棱同用。
Caution for pregnant women; avoid using it with sulfur and Tribulus terrestris.

贮藏 Storage

密封，防潮。
Seal and store in a moisture-proof place.

玄明粉

文本参考：《中国药典（2015年版）》
Text reference: Chinese Pharmacopoeia (2015 Edition)

概述 Overview

本品为芒硝经风化干燥制得。主含硫酸钠（Na2SO4）。
Exsiccated Sodium Sulfate is obtained from Glauber's salt by efflorescencing, containing mainly sodium sulfate (Na2SO4).

性状 Description

本品为白色粉末。气微，味咸。有引湿性。
White powder; odour, slight; taste, salty; hygroscopic.

鉴别 Identification

本品的水溶液显钠盐（通则0301）与硫酸盐（通则0301）的鉴别反应。
The aqueous solution yields the characteristic reactions of sodium salts and sulfates <0301>.

检查 Examination

铁盐与锌盐、镁盐 Iron and Zinc, Magnesium

照芒硝项下的方法检查，但取用量减半，应符合规定。
Carry out the tests described under Natrii Sulfas, using a half quantity, comply with the requirements.

重金属 Heavy metals

取本品1.0g，加稀醋酸2ml与适量的水溶解使成25ml，依法检查（通则0821第一法），含重金属不得过20mg/kg。
Dissolve 1.0 g of the powder in 2 ml of dilute acetic acid TS, add a quantity of water to 25 ml. Carry out the limit test for heavy metals <0821, method 1>, not more than 20 mg/kg.

砷盐 Arsenic

取本品0.10g，加水23ml溶解后，加盐酸5ml，依法检查（通则0822），含砷量不得过20mg/kg。
Dissolve 0.10 g of the powder in 23 ml of water, and add 5 ml of hydrochloric acid. Carry out the limit test for arsenic <0822>, not more than 20 mg/kg.

含量测定 Assay

取本品，置105℃干燥至恒重后，取约0.3g，精密称定，照芒硝〔含量测定〕项下的方法测定，即得。
Weigh accurately about 0.3 g of the powder, previously dried at 105℃ to constant weight, carry out the assay described under Natrii Sulfas.

本品按干燥品计算，含硫酸钠（Na2SO4）不得少于99.0%。
It contains not less than 99.0 per cent of sodium sulfate (Na2SO4), calculated with reference to the dried drug.

性味与归经 Property and Flavor

咸、苦，寒。归胃、大肠经。
Cold; salty and bitter. Stomach and large intestine meridians.

功能与主治 Actions and Indications

泻下通便，润燥软坚，清火消肿。用于实热积滞，大便燥结，腹满胀痛；外治咽喉肿痛，口舌生疮，牙龈肿痛，目赤，痈肿，丹毒。
To purge and relax the bowels, moisten dryness, soften hardness, clear fire and relieve swelling. Accumulation and stagnation of excess heat, dry stool bind, distention, pain and fullness in the abdomen. Topical application: Swelling and sore throat, mouth and tongue sores, swelling painful gum, red eyes, swelling abscess, and erysipelas.

用法与用量 Administration and dosage

3～9g，溶入煎好的汤液中服用。外用适量。
3-9 g, dissolved in prepared decoction. Appropriate amount for topical application.

注意 Precautions and Warnings

孕妇慎用；不宜与硫黄、三棱同用。
Used with caution during pregnancy. Incompatible with Sulphur, pregnancy sparganii.

贮藏 Storage

密封，防潮。
Preserve in a tightly closed container, and protect from moisture.