Sodium sulfate Low price high purity

Classification: Hormones and synthetic substitutes

Cas NO.: 7757-82-6

Name: Sodium sulfate

Molecular Formula: Na2O4S

Melting Point: 884°C(lit.)

Boiling Point: 1700°C

Refractive index:1.484

Flash Point: °C

Purity: 99%

usage: Pharmaceutical intermediate

Brand Name: xingbei

EINECS: 231-820-9; 268-366-6

Aliase: Anhydrous sodium sulfate;Bisodium sulfate;bisodiumsulfate;Crimidesa;Crude sodium sulfate;dibasicsodiumsulfate;Disodium monosulfate;Disodium sulfate

Purity: 99%

Appearance:White powder

Brand: xingbei

Packaging Detail: bottle/Aluminum foil bag/Customized to your needs

Delivery Detail: Delivery immediately upon receipt of payment.

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CAS No. 7757-82-6 Molecular formula Na2SO4 Molecular weight 142.04214EINECS No. 231-820-9 Related categories sulfate; Agricultural residues, veterinary drugs and fertilizers; Chemical mineral raw materials; Inorganic chemical products; Other processing agents; Food processing AIDS; Food additives; Inorganic salt; Inorganic compounds and salts; Chemical products - Inorganic chemical industry; Chemical raw materials; Inorganics; InorganicSalts; OtherDryingAgentsSyntheticReagents; Adsorbents,FilterAidsandDryingAgents; Salts; SodiumSalts; SaltSolutions; metalsulfate; FoodAdditives; Inorganic chemical raw materials; General biochemical reagent - inorganic salt; Inorganic substance; Inorganic raw materials Mol File 7757-82-6.mol Structural Sodium sulfate Properties Melting point 884°C(lit.) Boiling point 1700°C Density 2.68g/mLat25°C(lit.) Refractive index 1.484 Storage conditions Storeat+5°Cto+30°C. Solubility H2O:1Mat20°C, transparent, colorless form powder color white specific gravity 2.68 Odor (Odor)wh. Crystals. Or powder, odorless, Bitter saline taste PH 5.2-8.0(50g/ L,H2O,20℃) ph range 5.2-9.2 Water solubility 18.5mg/L Sensitivity Hygroscopic Maximum wavelength (λmax)λ:260nmAmax:0.015λ:280nmAmax:0.015M Erck14, 8680 dielectricconstant2. 7 (Ambient) stability and stable. Incompatible with strong acids, aluminum, magnesium, and alkali. Hygroscopicity. LogP-1.031(est)CAS database 7757-82-6(CASDataBaseReference)NIST Chemical Information Sodiumsulfate(7757-82-6)EPA Chemical information Sodiumsulfate(7757-82-6) Sulfur Sodium sulfate is an important chemical raw material, which is the main raw material for the production of sodium sulfide, sodium silicate and other chemical products, and can also be used as a filler for synthetic detergent, and a cooking agent for the manufacture of sulfate pulp in the paper industry. Sodium sulfate is also known as sodium powder, anhydrous glauberite, anhydrous leather nitrate. White monoclinic system of fine crystals or powders. The relative density is 2.68, and the melting point is 884℃. Dissolved in water, the aqueous solution is neutral. Soluble in glycerol, insoluble in ethanol, exposed to air, easy to absorb water into aqueous sodium sulfate. It is a homogeneous polycrystalline substance, at 32.4 ~ 223 ° C temperature is diamond shape, at higher temperatures, the formation of monoclinic crystals, 241 ° C into hexagonal crystals. When crystallized from solution, it has affinity for iron, iron compounds and various organic compounds; High purity, fine particles of anhydrous sodium sulfate is called sodium powder. There are two kinds of crystalline hydrate of sodium sulfate: one is sodium sulfate heptahydrate Na2SO4·7H2O, white regular six or tetragonal crystal, water loss at 24.4℃. The other is sodium sulfate decahydrate Na2SO4·10H2O, the common name of glauberite, sodium powder, insurance powder, etc. Colorless monoclinic crystal, density 1.464g/cm3, melting point 32.38℃, 100℃ loss of crystalline water into anhydrous sodium sulfate, easily soluble in water, in dry air easily weathered into anhydrous white powder. Sodium sulfate can be used as a chemical analysis reagent, such as the verification of dyes, dyeing industry as a mordant, for the manufacture of sodium sulfide, glass, water glass, enamel, quantitative measurement of nitrogen, pulp, medical use as a diuretic, purgative agent and barium salt poisoning antidote. In winter, sodium sulfate crystals are precipitated in salt ponds. Naturally occurring sodium sulfate ore is widely distributed, mostly double salts of magnesium sulfate (calcium) and mirabilite. China's Inner Mongolia, Qinghai, Tibet and some areas of Xinjiang have more salt lakes, and there is a large amount of sodium sulfate in salt lakes. The industrial production of sodium sulfate is mainly obtained by separating natural ore, or by dewatering glauberite and treating sodium chloride with sulfuric acid. Sodium sulfate is also a by-product of many production sectors of the chemical industry and is extracted from waste liquids from the production of viscose fibers and cellophane. In the production of sodium bichromate, phenol, boric acid, lithium carbonate and some pigments, there is also sodium sulfate as a by-product. Sodium sulfate decahydrate is heated to the melting point (32.38℃), which dissolves in its own crystalline water, while forming anhydrous salt. This temperature is the three-phase equilibrium temperature of ten water salt, anhydrous salt and saturated solution, as long as the three phases coexist, this temperature is fixed, so this system can be used as a constant temperature tank or temperature correction. Another characteristic of sodium sulfate is that it is easily supersaturated. Sodium sulfate is an important raw material for glass and paper making. In the paper and cellulose industry, the largest amount, the amount of about 70% of the total. Sodium sulfate is the component of synthetic detergent, it is a neutral salt, adding it can reduce the surface tension, increase the solubility of detergent. It is also the diluent of dyes and dyeing auxiliaries, as direct dyes, sulfur dyes, VAT dyes dyeing cotton fibers, as direct dyes dyeing silk slow dyeing agent. In the chemical industry, sodium sulfate is used as a raw material for the manufacture of sodium sulfide, gypsum, sodium silicate and other chemical products. Methods have been developed to manufacture sulfuric acid, sulfur, soda ash, ammonium sulfide and other products with sodium sulfate, but these methods have not been promoted to Chemicalbook application due to high cost. Sodium sulfate is commonly used in the laboratory to make cold. In medicine, glauberite is used as a purgative. Most of the sodium sulfate entering the body remains in the gastrointestinal tract, is not absorbed, and maintains certain penetration, which can increase intestinal content and cause intestinal peristalsis, and has purging effect. Sodium sulfate is an antidote for barium and lead poisoning. When lead poisoning occurs, the stomach can be washed with 10% glauberite or 1 ~ 2% sodium sulfate solution can be taken internally. Pharmacological effects A small amount of internal administration, with its ion and osmotic pressure, can mildly stimulate the digestive tract mucosa, the secretion and movement of the gastrointestinal tract slightly increased, so it has stomach strengthening effect. A large amount of internal administration, that is, a large amount of sodium sulfate is dissolved in a large amount of water, because its ions are not easily absorbed, can keep a large amount of water in the intestine, can mechanically stimulate the intestinal mucosa, can soften the stool block, is conducive to accelerating defecation, clinically mainly used for constipation of the large intestine, the elimination of intestinal toxins, insect body and so on. Solubility in water (g/100ml) Dissolved grams per 100ml of water at different temperatures (℃) :4.9g/0℃; 9.1 g / 10 ℃; 19.5 g / 20 ℃; 40.8 g / 30 ℃. 40 ℃ 48.8 g / 45.3 g / 60 ℃; 43.7 g / 80 ℃; 42.7 g / 90 ℃; The sodium test (IT-28) and sulfate test (IT-29) of 5% sample solution of 42.5g/100℃ identification test were positive. The sample, which was pre-dried at 105℃ for 4h, was about 500mg, dissolved in 200ml water, added 1m1 hydrochloric acid, and heated to boiling. Under constant agitation, about 10ml of hot barium chloride test solution (TS-37) was added in small amounts in batches and heated on a steam bath for 1h. The precipitation is filtered out, washed to chlorine-free, dried, burned and weighed, and the resulting barium sulfate mass is multiplied by 0.6086, which is equivalent to sodium sulfate (Na2SO3) content. The toxicity ADI is not restrictive (FAO/WHO, 2001). GRAS(FDA, §186.1797, 2000). LD505989mg/kg(mouse, oral). Maximum allowable amount of food additives Maximum allowable residual standard ▼▲ Additive Chinese name allowed to use the additive Chinese name of the food additive function Maximum allowable amount (g/kg) Maximum allowable residual amount (g/kg) sodium sulfate food processing AIDS for the food industry/generally should be made before the final product out, Excluding chemical properties with specified residual amounts in food, white monoclinic crystalline system crystals or powders. Soluble in water, the aqueous solution is alkaline. Soluble in glycerol, insoluble in ethanol. Use as analytical reagent and mordant Use as analytical reagent and dehydrating agent Use as caramel pigment manufacturing agent. Food coloring thinner. GB2760-96 is specified as a processing aid for food. In the United States, there is no limit to the amount of paper used in contact with food (FDA, §186.1771, 2000). See "glauberite" for use. It is mainly used as filling material for synthetic detergent. A cooking agent used in the paper industry to make kraft pulp. Used in the glass industry instead of soda ash. Chemical industry used as raw materials for the manufacture of sodium sulfide, sodium silicate and other chemical products. The textile industry is used to prepare vinylon spinning coagulation bath. Used in the pharmaceutical industry as a laxative. Also used in nonferrous metallurgy, leather and other aspects. Uses in medicine as a salting agent, coagulant, also used in paper, glass, printing and dyeing, synthetic fiber, leather and other industrial applications such as Kjeldahl nitrogen determination. Dry organic liquid. Test for serum protein. Determination of copper content in iron and steel production method Vacuum evaporation method The natural glauthenite is dissolved and clarified, and the clarified liquid is dehydrated by vacuum evaporation, thickened, centrifuged and dried to obtain anhydrous sodium sulfate. Na2SO4? 10H2O→Na2SO4+10H2O calcium glauberite process calcium glauberite ore is crushed, water ball milling, leaching, leaching of glauberite liquid through filtration to remove impurities, filtrate clarification, and then through evaporation, dehydration, centrifugal separation, drying to produce anhydrous sodium sulfate. Na2SO4? CaSO4+2H2O→Na2SO4+CaSO4? Anhydrous sodium sulfate was prepared from high and low temperature salt, a byproduct of potassium chloride production, by 2H2O conversion method. Under certain temperature and dosage conditions, magnesium sulfate and sodium chloride are transformed into white sodium magnesium alum, then into anhydrous sodium magnesium alum, and finally into anhydrous sodium sulfate after three stages of conversion. The whole conversion process is a continuous countercurrent operation. Slurry by mechanical promotion and lifting, liquid and reverse overflow according to the position difference, the interaction and influence between each stage, the first stage conversion control at Ph value 3 ~ 4, the temperature 55 ~ 70℃ reaction, the formation of white sodium magnesium alum slurry into the first stage settler thickening, and then sent to the second stage conversion tank; Second stage conversion Ph4 ~ 5, the temperature is about 100℃; In the third stage, the conversion condition is controlled by Ph5 ~ 6, and the temperature is about 55℃. Under stirring, anhydrous sodium magnesium alum reacts with sodium chloride aqueous solution to produce anhydrous sodium sulfate, which is centrifuged and dried. Is it 2NaCl+2MgSO4+4H2O→Na2SO4? MgSO4? 4H2O+MgC12Na2SO4? MgSO4? 4H20→Na2SO4? MgSO4+4H2ONa2SO4? MgSO4+2NaCl→2Na2SO4+MgCl2 method has high cost, low recovery rate, sulfuric acid consumption, impurities are not easy to remove, the resulting product color is poor, but the equipment is simple. Anhydrous sodium sulfate was obtained from the waste liquid of rayon solidification after crystallization, dissolution, neutralization, filtration, concentration, cooling, separation and drying. For the production method of H2SO4+2NaOH→Na2SO4+2H2O, see "Glauberite". The production method is a byproduct of co-heating sulfuric acid with salt to produce hydrochloric acid, which is obtained by recrystallization in water (it is a colorless monoclinic crystal).