Feed grade anhydrous sodium sulfate is white fine crystal or powder, soluble in water, hygroscopic, odorless and non-toxic. It is widely used in feed and feed additives. Sodium sulfate (Na2SO4) is a nutrient additive with high feeding value. The sulfur element in sodium sulfate molecule can improve the absorption and utilization of nitrogen and other nutrients in feed. The feeding effect shows that adding proper amount of sodium sulfate in the feed can strengthen the resistance of livestock and poultry, promote the growth and production performance of livestock and poultry, accelerate the growth and development of livestock and poultry, improve the milk yield, egg yield, meat yield and wool yield, and improve the economic benefits.

饲料级无水硫酸纳由芒硝矿溶解澄清，经过反复精制处理，并严格控制卫生指标，真空精制而成。对产品中的铅、砷、铁、锌等得金属含量进行严格控制，通过多次过滤、澄清，以降低钙、镁等杂质含量，水分控制参数高于元明粉。饲料级硫酸纳质量执行标准：Q/20764816-2.1-2007。

Feed-grade anhydrous sodium sulfate is made by dissolving and clarifying mirabilite ore, repeatedly refining, strictly controlling sanitary indicators, and vacuum refining. The content of lead, arsenic, iron, zinc and other metals in the product is strictly controlled. Through multiple filtration and clarification, the content of calcium, magnesium and other impurities is reduced. The moisture control parameter is higher than that of sodium sulfate. Executive standard for feed grade sodium sulfate quality: Q/20764816-2.1-2007.

中文名称（别称）：元明粉

Chinese name (alternate name): sodium sulfate

CAS No.： 7757-82-6

CAS No.： 7757-82-6

分子式： Na2SO4

Molecular formula: Na2SO4

分子量： 142.04

Molecular weight: 142.04

药用价值

Medicinal value 

禁忌：若胃虚实热者禁用。

Contraindications: forbidden if the stomach is deficient and hot.

性味：辛甘而冷。

Sexual taste: sweet and cold.

功能：去胃中之实热，荡肠中之宿垢，润燥破结，消肿明目。

Function: remove excess heat in the stomach, dissipate persistent dirt in the intestines, moisten dryness and break knots, and reduce swelling and brighten the eyes.

炮制：朴硝煎化，同莱菔煮，再用甘草煎入罐，火煅，以去其咸寒之性，阴中有阳，性稍和缓，大抵用代朴硝。

Processing: boiled with radish, then boiled with licorice in a pot and calcined with fire to remove its salty and cold nature. There is yang in yin, and the nature is slightly gentle, which can be used as a substitute.

配伍：俱忌苦参。

Compatibility: bitter ginseng is forbidden.

备注：(1)「消肿明目」：血热去则肿消而目明。

Remarks: (1) "Reduce swelling and brighten the eyes": if the blood heat is gone, the swelling will disappear and the eyes will brighten.

(2)昂按泻痢不止用大黄元明粉以推荡之而泻痢反止，盖宿垢不净疾终不除，经所谓通因通用也。

(2) Ong press diarrhea not only uses rhubarb sodium sulfate to push the diarrhea to stop, but also covers the dirt and does not clean the disease, which is also called universal.

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