Sulfur is also known as sulfur, colloidal sulfur and sulfur block. The appearance is light yellow brittle crystal or powder with a special odor. The molecular weight is 32.06, the vapor pressure is 0.13kPa, the flash point is 207°C, the melting point is 119°C, the boiling point is 444.6°C, and the relative density (water=1) is 2.0. Sulfur is insoluble in water, slightly soluble in ethanol and ether, and easily soluble in carbon disulfide. As a flammable solid, sulfur is mainly used in the manufacture of dyes, pesticides, matches, gunpowder, rubber, rayon, etc. Also known as stone sulfur, sulfur, stone sulfur, Kunlun sulfur, sulfur tooth, sulfine, sulfur, Shitingzhi, Jiuling sulfur boy, Shanshizhu, sulfur sand, general, white sulfur, natural sulfur, sulfur flower, sulfur powder . Pinyin liú huáng Chemical formula S (essentially S8, crown-shaped structure) Customs commodity code: 2503000000 Dangerous goods number: 41501 CAS number: 7704-34-9 Edit this paragraph Physical and chemical properties Melting point: 114℃ Solubility: Insoluble Vapor pressure: 12600mmHg at 25°C Properties: Powdered sulfur is light yellow powder. Melting point: 112.8℃ (α type) Boiling point: 444.6℃ Relative density: 2.07 (α type) Solubility: Easily soluble in carbon disulfide, insoluble in water, slightly soluble in ethanol and ether. Edit this paragraph Sulfur classification Sulfur plays a great role in daily life and industrial sulfur production. Mainly used in rubber tires, fireworks, pesticides, fertilizers, food industry, flowers, trees, fruit trees, daily chemical aid, and industrial products. It is mainly divided into two categories. Namely: food grade sulfur, industrial grade sulfur. Food grade sulfur: For example, in food production, sulfur has bleaching and antiseptic effects. It is also an essential material for corn starch processing and plays an important role in dried fruit processing. Industrial grade sulfur: such as electronic semiconductors, plastics, Latex, papermaking, pharmaceutical fine chemicals, industrial ceramics, building materials and auxiliary materials and other industrial sectors style classification sulfur powder sulfur block sulfur granules sulfur tablets liquid sulfur Edit this paragraph efficacy classification disinfection and insecticide (parasites, scabies, etc.) dampness and antipruritic medicine Edit this section The medicinal materials are originally based on the natural element sulfur-like mineral natural sulfur, which is mainly made of sulfur-containing substances or crystals of refined and sublimated sulfur-containing minerals.
Edit this paragraph: Medical effects: Chemical composition: Mainly contains elemental sulfur S8, with a small amount of calcium, iron, aluminum, magnesium and trace amounts of selenium, tellurium and other elements. Progress in research on chemical composition: brief physical and chemical identification 1. This product melts easily when burning, the flame is blue, and it produces irritating odor of sulfur dioxide. This gas can cause the filter paper dipped in potassium permanganate solution to fade. 5SO2+2KMnO4+2H2O—→K2SO4+2MnSO4+2H2SO4 2. Grind this product into fine powder, put 0.1g into a beaker, add about 0.1g sodium sulfite and 10ml water, boil for 5 minutes, filter, take 2 drops of the filtrate and put it in a test tube, add 3 drops of silver nitrate test solution, a white precipitate will form and quickly It goes from yellow to brown and finally turns to black. Na2SO3+S—→Na2S2O3 Na2S2O3+2AgNO3—→Ag2S2O3↓ (white) +2NaNO3 Ag2S2O3+H2O—→H2SO4+Ag2S↓ (white)→(yellow)→(brown)→(black) Composition analysis research progress: brief content determination A brief pharmacological effect: sublimated sulfur has bactericidal (including fungi) and scabies effects. Its effect is due to the fact that it changes into hydrogen sulfide and polysulfide after contact with the skin. Sublimated sulfur has the effect of dissolving skin cutin. Edit this paragraph Modern research on the main ingredients: The pure product mainly contains sulfur, but also contains tellurium and selenium. It is also often mixed with soil and organic matter. Pharmacological effects: 1. Experiments on the effects on the central nervous system show that sulfur has no significant effect on the sleep effects of chloral hydrate and ethanol in mice, but has a significant enhancement effect on the central inhibitory effects of chlorpromazine and thiopental sodium, suggesting that sulfur has an effect on the brain. It has an inhibitory effect. 2. Antitussive and expectorant effects: Sulfur and sublimated sulfur (crystallization of sulfur after high-temperature sublimation) have certain antitussive and anti-inflammatory effects on experimental bronchitis in rats caused by sulfur dioxide stimulation, and can reduce the infiltration of chronic inflammatory cells in bronchial tubes at all levels. , and at the same time, the number of goblet cells in the bronchial mucosa at all levels can be reduced to varying degrees. The antitussive effect of sublimated sulfur is better than that of sulfur. The reason may be related to the fact that the sublimated sulfur powder is extremely fine and is better absorbed when taken orally. The results of the phenol red excretion method in mice show that giving mice sulfur can promote the secretion of phenol red from the bronchus. Clinical observation shows that "Shuanghuang Tablets" (each tablet contains 0.25g of sulfur or sublimated sulfur and 0.03g of rhubarb) can gradually reduce the amount of phlegm in patients with chronic bronchitis, showing a "phlegm-reducing" effect. The reason may be related to sulfur (or sublimated sulfur). ), because it is not comparable to drugs that simply promote bronchial secretion and make phlegm easily coughed up. 3． Anti-inflammatory effect: Sulfur and sublimated sulfur show obvious therapeutic effects on formaldehyde-induced "arthritis" in rats at appropriate dosages and treatment courses. Taking 900mg/kg orally once, twice a day, has similar effects to sodium salicylate 600mg/kg (once a day). Sublimated sulfur can also reduce the increase in permeability of rat capillaries caused by injection of egg white. 4. Laxative effect: Sulfur is converted into hydrogen sulfide in the body after oral administration. In an alkaline environment and in the presence of Escherichia coli, especially in the presence of lipolytic enzymes, sulfur can stimulate the gastrointestinal mucosa, excite peristalsis, and cause diarrhea. When there are a lot of fatty substances in the intestines, a large amount of hydrogen sulfide is easily produced and causes diarrhea. However, hydrogen sulfide is produced very slowly in the intestine, so its purgative effect is not strong and has nothing to do with the dosage. The feces is only in the form of paste and has a strong odor of hydrogen sulfide. 5. Other effects: When sulfur comes into contact with the skin, it can generate hydrogen sulfide at body temperature, which has the effect of killing scabies; it may also be oxidized into pentasulfate by the action of certain microorganisms or epithelial cells, which has bactericidal and fungicidal effects. In addition, sulfide can dissolve cutin and remove hair, and can be used to treat skin diseases.