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Send EmailMagnesium sulfate heptahydrate, MAGNESIUM SULFATE 7HYD XTL, Crystalline magnesium sulfate, 10034-99-8
Magnesium sulfate heptahydrate
CAS: 10034-99-8
Molecular Formula: Mg.O4S.7H2O
Names and Identifiers
| Name | Magnesium sulfate heptahydrate |
| Synonyms | MgSO Magnesium Sulfate 7H2O MAG-BIND EQUIPURE LIBR MAGNESIUM SULFATE 7HYD XTL Crystalline magnesium sulfate Magnesium sulfate heptahydrate Magnesium sulphate heptahydrate Magnesium(II), sulfate, heptahydrate MAGNESIUMSULFATE,HEPTAHYDRATE,BIOTECHG Magnesium sulfate heptahydrate (MgSO4.7H2O) Magnesium sulfate heptahydrate Manufacturer MAGNESIUM SULFATE, HEPTAHYDRATE, REAGENT (ACS)MAGNESIUM SULFATE, HEPTAHYDRATE, REAGENT (ACS)MAGNESIUM SULFATE, HEPTAHYDRATE, REAGENT (ACS) MAGNESIUM SULFATE, HEPTAHYDRATE, BIO-REFINEDMAGNESIUM SULFATE, HEPTAHYDRATE, BIO-REFINEDMAGNESIUM SULFATE, HEPTAHYDRATE, BIO-REFINEDMAGNESIUM SULFATE, HEPTAHYDRATE, BIO-REFINED |
| CAS | 10034-99-8 |
| EINECS | 600-073-4 |
| InChI | InChI=1/Mg.H2O4S.7H2O/c;1-5(2,3)4;;;;;;;/h;(H2,1,2,3,4);7*1H2/q+2;;;;;;;;/p-2 |
| InChIKey | WRUGWIBCXHJTDG-UHFFFAOYSA-L |
Physico-chemical Properties
| Molecular Formula | Mg.O4S.7H2O |
| Molar Mass | 246.47 |
| Density | 2.66 |
| Melting Point | 1124°C |
| Boling Point | 330°C at 760 mmHg |
| Water Solubility | Soluble in in water and acid. Slightly soluble in alcohol and glycerol. |
| Solubility | Easily soluble in water, slightly soluble in ethanol and glycerin. |
| Vapor Presure | <0.1 mm Hg ( 20 °C) |
| Vapor Density | <0.01 (vs air) |
| Appearance | Crystalline or white powder |
| Specific Gravity | 1.68 |
| Color | White |
| Maximum wavelength(λmax) | λ: 260 nm Amax: 0.010λ: 280 nm Amax: 0.010 |
| Merck | 14,5691 |
| PH | 5.0-8.0 (25℃, 50mg/mL in H2O) |
| Storage Condition | Store at +5°C to +30°C. |
| Stability | Stable. Non-flammable. May slowly deteriorate in contact with air. |
| MDL | MFCD00149785 |
| Physical and Chemical Properties | Properties of Industrial magnesium sulfate generally refers to seven water. For colorless fine needle-like or oblique columnar crystals. Odorless and bitter. Relative density 1.68 soluble in water, slightly soluble in ethanol and glycerol. |
| Use | Used in leather, fertilizer, porcelain, matches, explosives, printing and dyeing, pharmaceutical and other industries |
Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S24/25 - Avoid contact with skin and eyes. S36 - Wear suitable protective clothing. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
| WGK Germany | 1 |
| RTECS | OM4508000 |
| TSCA | Yes |
| HS Code | 28332100 |
Upstream Downstream Industry
| Raw Materials | Sulfuric acid Magnesium oxide |
| Downstream Products | Magnesium Hydroxide Ammonium magnesium sulfate Magnesium trisilicate 2-(4-thiazolyl)benzimidazole Bacillus thuringiensis Magnesium naphthenate Gentamycin Solution |
Reference
Nature
colorless tetragonal columnar crystals or granular crystals. The taste was salty and slightly bitter. d 1. 67. 47 degrees below the more stable. Dry air is susceptible to weathering, losing 1 crystal water. Lose 4 crystal water at 70~80 ℃. 100 deg C lost 5 crystal water, 120 deg C lost 6 crystal water, if exposed to humid air and rapid absorption of water. About 250 ° C. Became anhydrous. Soluble in water (20 degrees C: 7lg/lOOmL; 40 degrees C: 91g/lOOmL), the solution is neutral, pH 6~7. Slightly soluble in ethanol.
Preparation Method
concentrated sulfuric acid was poured into water, and Basic Magnesium carbonate was added in portions with stirring. After completion of the reaction, a magnesium sulfate solution was obtained. Magnesium oxide was added to the solution, and impurities such as iron and manganese therein were boiled by heating to form a hydroxide precipitate. After filtration, the filtrate was concentrated by heating to a relative density of 135. After cooling at room temperature for several hours, crystals of magnesium sulfate heptahydrate were precipitated. The crystals were filtered, washed with a small amount of water for several times, and dried at room temperature.
Introduction
Soluble in water, soluble in glycerol, slightly soluble in ethanol.
Use
magnesium sulfate is an important inorganic chemical products, the use is very extensive. In medicine, for the deployment of protective ointments, laxatives, analgesics, antidotes; In the microbial industry used as medium components, brewing additives, fermentation of nutrient sources, in the light industry for fresh yeast, monosodium glutamate, beverage, mineral water, health salt, sea crystal, Bath Kang, Borton beer and toothpaste in the production of calcium hydrogen phosphate stabilizer; In food additives for nutritional supplements, curing agents, flavor enhancer, processing aids; in the chemical industry for the manufacture of magnesium stearate, magnesium hydrogen phosphate, magnesium oxide and other magnesium salts and potassium sulfate, sodium sulfate and other sulfate; In the printing and dyeing industry as an alkali-resistant agent for printing and dyeing thin cotton, silk, also used as cotton, silk weighting agent, also do the filling of cotton products and for the production of rayon; In the manufacturing industry used as a filler to enhance heat resistance; In the electroplating industry to do conductive salt; in the feed additive, the main supplement of magnesium, is the composition of livestock bones and teeth, but also a variety of enzyme activators, play an important role in sugar and protein metabolism; Used as fertilizer in agriculture, it is a two-element fertilizer, sulfur/magnesium are the amount of nutrient elements, necessary for crop production. Magnesium is the sixth largest nutrient element of crops, is a component of chlorophyll and pigment, is the only metal element in the chlorophyll molecule, magnesium can promote photosynthesis, promoting the formation of carbohydrate protein/fat I is used as a flame retardant for plastics such as acrylate resin, epoxy resin, unsaturated polyester and polyurethane in the aspect of fire protection materials; In the environmental protection for industrial sewage treatment; In the paper industry also has applications, can also be applied to cement coagulant, explosives, powder, porcelain, glass, pigment, ABS resin manufacturing.
Safety
lined with polyethylene plastic bag, external plastic woven bag packaging, each net weight of 25kg, 40kg, 50kg. Store in a cool, ventilated place. The temperature of the library is not more than 48 degrees C, and it is moisture-proof. Protection against rain and sun exposure during transport. When loading and unloading, handle with care to prevent damage to the package. Magnesium sulfate heptahydrate is a volume laxative, generally non-toxic, partially absorbed after oral administration, about 20% into the blood, can inhibit the central nervous system, after an overdose, when the blood magnesium concentration reached 20mg/10og (normal 2~3.520mg/10og), the performance of deep anesthesia, even Shock, weight
The patient's heart rate slowed down, blood pressure decreased, lethargy, Coma. For food poisoning, should be oral milk or egg white and other protective agents, and gastric lavage, renal function can be used to accelerate the excretion of diuretics, for acute poisoning, should be artificial respiration, and slow injection of calcium preparation rescue.
Reference Information
| overview | magnesium sulfate heptahydrate (molecular formula MgSO4 · 7H2O), also known as sulfur, bitter salt, Epsom salt and Epsom salt, are white or colorless needle-shaped or oblique columnar crystals, odorless, cool and slightly bitter, molecular weight: 246.47, specific gravity 1.68, soluble in water, slightly soluble in ethanol and glycerin, dissolve in its own crystalline water at 67.5 ℃. Decomposed by heat, 70, 80 ℃ is the crystal water that loses four molecules. At 200 ℃, all crystalline water is lost to anhydrous. In the air (dry) easy weathering into powder, heating gradually remove the crystal water into anhydrous magnesium sulfate, this product does not contain any toxic impurities. Because magnesium sulfate heptahydrate is not easy to dissolve, it is easier to weigh than anhydrous magnesium sulfate, which is convenient for quantitative control in industry. Mainly used in the manufacture of fertilizers, tanning, printing and dyeing, catalysts, papermaking, plastics, porcelain, pigments, matches, explosives and fireproof materials. It can be used for printing and dyeing fine cotton cloth and silk, as a weighting agent for cotton silk and a filler for kapok products; it is used as Epsom salt in medicine. |
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| agricultural use | magnesium is the core element of chlorophyll, which can strengthen the reduction process of plants and improve disease resistance. it is essential for photosynthesis. Magnesium is an activator of many enzymes, which can promote carbohydrate metabolism, nucleic acid synthesis, phosphate conversion, etc. Magnesium sulfate is a very important fertilizer because it can provide rich nutrition for crops. Magnesium contributes to crop growth and high yield. Sulfur is the main component of proteins and enzymes in plants, which can promote root growth, enhance metabolism and redox in plants, thereby promoting vigorous crop growth and increasing yield. Magnesium sulfate is a good fertilizer. It can not only provide magnesium and sulfur, but also make the compounded soil loose and powerful, the root system of the plant is developed, and it can fully absorb nutrients and make the plant more luxuriant. Magnesium and 15 other elements are considered to be nutrients for plant growth and high yield. Regarding plant nutrients and fertilizers, the nutrients contained in traditional fertilizers (nitrogen, phosphorus, potassium) are obviously not enough to increase agricultural yields. The medium amount of nutrients (calcium, magnesium, sulfur) and micronutrients (zinc, copper, iron, manganese, boron, molybdenum and chlorine) become less in the soil, and the lack of these nutrients will lead to a decrease in crop yield. It has been proved that the excessive extraction of magnesium from the soil is the main source of this widely distributed deficiency. Magnesium is an important component to improve productivity and agricultural output, and it must be supplemented in time. It can be mixed with nitrogen, phosphorus, and potassium to form compound fertilizers or mixed fertilizers according to different needs, or it can be mixed with one or more elements to form various fertilizers and photosynthetic fertilizers. After the actual field fertilization experiment of nine crops such as rubber trees, fruit trees, tobacco leaves, and beans, potatoes, and cereals, the compound fertilizer containing magnesium can increase the crops by 15-50% compared with the compound fertilizer without magnesium. | |
| feed | feed grade magnesium heptahydrate sulfate is used as a supplement for magnesium in feed processing. Magnesium is an indispensable factor in the process of osteogenesis and muscle contraction in livestock and poultry. It is an activator of various enzymes in livestock and poultry, and plays an extremely important role in material metabolism and neural function in livestock and poultry. If the body of livestock and poultry is short of magnesium, it will lead to material metabolism and neurological dysfunction, supply imbalance, affect the growth and development of livestock and poultry, and even lead to death. | |
| reference quality standard | magnesium sulfate heptahydrate (industrial grade) index appearance: colorless small particle crystal main content: ≥ 99.5% PH(5W/V%Sol): 5-8 iron content (Fe): ≤ 0.0015% chlorine content (cL): ≤ 0.02% heavy metal (Pb): ≤ 0.001% arsenic content (As): ≤ 0.0002% water insoluble matter: ≤ 0.01% loss on ignition: 48-52% magnesium sulfate heptahydrate (pharmaceutical grade) index appearance: colorless small particle crystal main content: ≥ 99.5% PH(5W/V%Sol): 5-8 iron content (Fe): ≤ 0.0015% chlorine content (cL): ≤ 0.01% heavy metal (Pb): ≤ 0.001% arsenic content (As): ≤ 0.0002% water insoluble matter: ≤ 0.01% loss on ignition: 48-52% magnesium sulfate heptahydrate (food grade) index appearance: colorless small particle crystal main content: ≥ 99.5% PH(5W/V%Sol): 5-8 iron content (Fe): ≤ 0.0015% chlorine content (cL): ≤ 0.01% heavy metal (Pb): ≤ 0.001% arsenic content (As): ≤ 0.0002% water insoluble matter: ≤ 0.01% loss on ignition: 48-52% magnesium sulfate heptahydrate (feed grade) index appearance: colorless small particle crystal main content: ≥ 99.5% PH(5W/V%Sol): 5-8 iron content (Fe): ≤ 0.0015% chlorine content (cL): ≤ 0.015% heavy metal (Pb): ≤ 0.001% arsenic content (As): ≤ 0.0002% water insoluble matter: ≤ 0.01% loss on ignition: 48-52% | |
| effect | is used for catharsis and its saturated solution for external application. it has anti-inflammatory, detumescence, detoxification and analgesic effects, and has the effects of inhibiting central nervous system, anti-plundering and antispasmodic effects. Used for printing and dyeing fine cotton cloth, as an aggravating agent for cotton and silk, filler for kapok products; used for grass, fertilizer, porcelain, pigments, matches, explosives and fireproof materials; microbial industry as a medium component, brewing additive, magnesium supplementing brewing water, as a nutrient source during fermentation; as a filler in the tannery industry Enhance heat resistance; used as a stabilizer for the production of fresh yeast, monosodium glutamate and calcium hydrogen phosphate in the production of toothpaste in light industry; a coagulant aid for cement; pulp industry, rayon and silk fabric industry are also used. Contains a small amount of crystal water or does not contain crystal water can be used for the water content can not be too high product synthesis and mixing ingredients, used in organic chemical industry can be used for desiccant and dehydrating agent, used for printing and dyeing thin cotton cloth, silk, as the weighting agent of cotton silk and the filler of kapok products. | |
| toxicity | magnesium sulfate can be used as a laxative orally. Due to slow absorption and rapid discharge, it generally does not show toxic effects. Large doses of internal administration paralyze nerves and muscles, and the heart can fail. Sometimes it can cause skin diseases. | |
| maximum allowable usage of food additives maximum allowable residue standard | ▼ ▲ Chinese name of additive allowed to use this kind of additive Chinese name of food additive function maximum allowable usage (g/kg) maximum allowable residue (g/kg) magnesium sulfate processing aid for food industry/generally should go out before making the final product, except for those with specified residues in food | |
| chemical properties | industrial magnesium sulfate generally refers to heptahydrate. It is a colorless fine needle or oblique column crystal. No smell, bitter taste. Easily soluble in water, slightly soluble in ethanol and glycerin. | |
| use | used in leather making, fertilizer, porcelain, matches, explosives, printing and dyeing, medicine and other industries used in steelmaking and ironmaking magnesium sulfate is a nutrient fortifier for feed. used as laxatives, choleretics, catharsis and duodenal diversion used as analytical reagent and mordant as food fortifier. Our country stipulates that it can be used for dairy products, and the usage amount is 3~7 g/kg; The usage amount in drinking liquid and milk beverage is 1.4~2.8 g/kg; The maximum usage amount in mineral beverage is 0.05 g/kg. It is used for printing and dyeing fine cotton cloth and silk, as a weighting agent for cotton and silk and a filler for kapok products. It is also used in the manufacture of porcelain, pigments and fireproof materials. Used as a laxative in medicine. The microbial industry is used as a medium component, an additive for brewing, and magnesium for supplementing brewing water, as a nutrient source for fermentation. As a filler in the leather industry to enhance heat resistance. Used as magnesium fertilizer in agriculture. It is used in light industry to produce fresh yeast, monosodium glutamate and as a stabilizer for calcium hydrogen phosphate in toothpaste production. Coagulant aid for cement. It is also used in pulp industry, rayon and textile industry. nutritional supplement; curing agent; flavor enhancer; processing aid. An additive for brewing, which supplements magnesium from brewing water, is used as a nutrient source during fermentation to improve fermentation capacity. Improve the flavor of synthetic sake (dosage 0.002%). Adjust the hardness of the water. It is used in Europe to produce "Bolton" type beer. It is mostly combined with calcium salt for liquor mother water. Adding 4.4g/100 1 water can increase the hardness by 1 degree. If it is used more, it will produce bitter taste and hydrogen sulfide odor. This product is used as a tannery filler. Used as a weighting agent for fine cotton cloth in the printing and dyeing industry. Paper sizing agent, etc. Used as a laxative, choleretic, used for catharsis and twelve fat intestinal diversion. used in medicine, food, feed additives, fermentation, industry, engineering plastics, agricultural fertilizers, daily chemicals and other fields |
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| production method | add 202kg of bitter soil (containing magnesium oxide above 85%) into a neutralization kettle, then add a certain amount of tap water and stir for a while, start dropping 417kg of sulfuric acid, first fast and then slow until the color changes from white to red. After dropping, react for 0.5h. The neutralization liquid is injected into the blade suction filter for filtration, the filtrate is injected into the crystallizer, the pH value is adjusted to 4 with sulfuric acid, the appropriate magnesium sulfate crystal seed is added to 30 ℃, centrifuged and separated, and dried at 50~60 ℃ to obtain the finished product. Add sulfuric acid to natural magnesium carbonate (magnesite), remove carbon dioxide, and recrystallize to obtain; dissolve magnesium sulfide and vanadium (Kieserite,MgSO4 · H2O) in hot water and recrystallize; it is prepared from seawater. Sulfuric acid method This method uses dolomite, serpentine, and chestnut as raw materials. Water or mother liquor is added into the neutralization reactor, and then sulfuric acid and bitter soil powder containing magnesium oxide 85% or more are slowly added into the reactor according to a certain ratio for neutralization reaction, and Ph = 5 is controlled with a concentration of 39~40 Bé. Stir for 30 min to fully carry out the reaction. Its MgO + H2SO4 + 6H2O → MgSO4 · 7H2O keeps the neutralization liquid at 80 ℃, the filtered filtrate is sent into the crystallizer, a proper amount of seed crystal is added, then cooled, filtered and centrifuged, and dried at 50~55 ℃ to obtain magnesium sulfate. Mother liquor is returned for ingredients. The bitter halide obtained in the salt lake by recrystallization method is naturally evaporated and concentrated into crude magnesium (crude magnesium sulfate). Using crude magnesium as raw material, it is dissolved in water at 80~90 ℃, then clarified at 60~70 ℃, cooled and crystallized at 20~25 ℃, separated by centrifugation, and dried to produce industrial magnesium sulfate products. Magnesium sulfate for industrial use is immersed in distilled water, the Ph value is adjusted with sulfuric acid, centrifuged, dried and dehydrated, and recrystallized to obtain magnesium sulfate for medicine. seawater sun-dried salt bitter halogen method seawater sun-dried salt is used to obtain bitter halogen. after evaporation by brine-mixed method, high-temperature salt is produced. its composition is MgSO4>30%, NaCI<35%, MgCl2 is about 7%, and KCl is about 0.5%. Bitter halide can be dissolved in 200g/L MgCl2 solution at 48 ℃, NaCl is less dissolved, while MgSO4 is more dissolved. After separation, the leaching solution is cooled to 10 ℃ to precipitate coarse MgSO4 · 7H2O, and the finished product is obtained by secondary recrystallization. Sulfuric acid method in the neutralization tank will be slowly added to water and mother liquor, and then neutralized with sulfuric acid, the color from soil color to red, control Ph = 5, relative density 1.37~1.38(39~40 ° Bé). Filter the neutralization liquid at 80°C, then adjust the Ph value to 4 with sulfuric acid, add an appropriate amount of seed crystal, and cool to 30°C for crystallization. After separation, the finished product is dried at 50~55 ℃, and the mother liquor is returned to the neutralization tank. Magnesium sulfate heptahydrate can also be prepared by neutralization reaction of low concentration sulfuric acid and bitter soil with 65% magnesium oxide content through filtration, precipitation, concentration, crystallization, centrifugal separation and drying. MgO + H2SO4 + 6H2O → MgSO4 · 7H2O (1) Bitter halogen method obtained from seawater sun-dried salt. Bitter halogen is obtained from seawater sun-dried salt, which is evaporated by halogen mixing method to produce high temperature salt. Its composition is MgSO4 greater than 30%, NaCL less than 35%, MgCL2 about 7%, and KCL about 0.5%. The dry halogen can be dissolved in 200g/L MgCL2 solution at 48 ℃, NaCL is dissolved less, while MgSO4 is dissolved more. After separation, the leaching solution is cooled to 10 ℃ to precipitate coarse MgSO4 · 7H20, and the finished product is obtained by secondary recrystallization. (2) sulfuric acid method. In the neutralization tank, the soil is slowly added into water and mother liquor, then neutralized with sulfuric acid, the color changes from white to red, and the PH = 5 is controlled, and the relative density is 1.37-1.38)39-40 Bé). Filter the neutralization liquid at 80°C, then adjust the pH to 4 with sulfuric acid, add an appropriate amount of seed crystal, and cool to 30°C for crystallization. After separation, the finished product is dried at 50-55 ℃, and the mother liquor is returned to the neutralization tank. Magnesium sulfate heptahydrate can also be prepared by neutralization reaction between low concentration sulfuric acid and chestnut with 65% magnesium oxide content, filtration, precipitation, concentration, crystallization, centrifugal separation and drying. |
