ZINC SULPHATE 7H20
Zinc sulfate Heptahydrate
CAS: 7446-20-0
Molecular Formula: H14O11SZn
ZINC SULPHATE 7H20 - Names and Identifiers
ZINC SULPHATE 7H20 - Physico-chemical Properties
| Molecular Formula | H14O11SZn |
| Molar Mass | 287.56 |
| Density | 1.957 |
| Melting Point | 100 °C |
| Boling Point | 330°C at 760 mmHg |
| Water Solubility | 960 g/L |
| Solubility | H2O: soluble100mg/mL, clear, colorless |
| Vapor Presure | 3.35E-05mmHg at 25°C |
| Appearance | Transparent crystallization |
| Specific Gravity | 1.97 |
| Color | White |
| Merck | 14,10159 |
| PH | 4-6 (50g/l, H2O, 20℃) |
| Storage Condition | Store at +5°C to +30°C. |
| Stability | Stable. Incompatible with strong oxidizing agents. Hygroscopic - protect from moisture. |
| Sensitive | Hygroscopic |
| MDL | MFCD00149894 |
| Physical and Chemical Properties | Characters: colorless orthorhombic crystals of prismatic crystals. melting point 100 ℃ relative density 1.957 solubility soluble in water. Slightly soluble in alcohol and glycerol. |
| Use | Used as mordant, wood preservative, paper industry bleaching agent, also used in medicine, artificial fiber, electrolysis, electroplating, pesticide and the production of zinc salt |
ZINC SULPHATE 7H20 - Risk and Safety
| Risk Codes | R22 - Harmful if swallowed R41 - Risk of serious damage to eyes R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R36/38 - Irritating to eyes and skin. |
| Safety Description | S22 - Do not breathe dust. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S39 - Wear eye / face protection. S46 - If swallowed, seek medical advice immediately and show this container or label. S60 - This material and its container must be disposed of as hazardous waste. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S25 - Avoid contact with eyes. |
| UN IDs | UN 3077 9/PG 3 |
| WGK Germany | 3 |
| RTECS | ZH5300000 |
| TSCA | Yes |
| HS Code | 28332600 |
| Hazard Class | 9 |
| Packing Group | III |
| Toxicity | LD50 orally in Rabbit: 1260 mg/kg |
ZINC SULPHATE 7H20 - Upstream Downstream Industry
| Raw Materials | Potassium permanganate Sulfuric acid Zinc Zinc oxide |
| Downstream Products | Flame Retardant ZB zinc cyanide Zinc ethylhexanoate Calcium superphosphate Zineb Mancozeb |
ZINC SULPHATE 7H20 - Reference
| Reference Show more | 1. [IF=4.155] Hong-shuang Liu et al."Sagittaria sagittifolia polysaccharide protects against six-heavy-metal-induced hepatic injury associated with the activation of Nrf2 pathway to regulate oxidative stress and apoptosis."J Inorg Biochem. 2022 Jul;232:111810 |
ZINC SULPHATE 7H20 - Nature
Open Data Verified Data
colorless or white crystalline powder. Relative density 1. 975; Melting point 100 ℃. Weathering in dry air. Soluble in water and amines, slightly soluble in ethanol and glycerol, insoluble in liquid ammonia and ketone. Heating to 30 deg C to lose 1 molecule of crystal water, 100 deg C to lose 6 molecules of crystal water, 280 deg C to lose 7 molecules of crystal water, 767 deg C decomposition into Zn0 and S03.
Last Update：2024-01-02 23:10:35
ZINC SULPHATE 7H20 - Preparation Method
Open Data Verified Data
in an acid-resistant reactor with a stirrer, a small amount of zinc oxide and a certain amount of sulfuric acid are added to form a dilute zinc sulfate solution, then zinc oxide is added to slurry under stirring, and then sulfuric acid is added to control the pH value to be 5.1, that is, the end point of the reaction. The reaction solution was filtered, and the filtrate was heated to
.
80 ℃, adding zinc powder to replace copper, cadmium, nickel, etc., and then filtered, the filtrate was heated to 80 ℃, adding potassium permanganate (or bleaching powder) and heated to boiling, the iron, oxidation of impurities such as manganese. The filtrate was clarified, evaporated, cooled and crystallized, centrifuged and dried to obtain zinc sulfate heptahydrate.
Last Update：2022-01-01 08:52:02
ZINC SULPHATE 7H20 - Introduction
Easily soluble in water, insoluble in ethanol and ketones, gradually weathering in the air.
Last Update：2022-10-16 17:28:23
ZINC SULPHATE 7H20 - Use
Open Data Verified Data
in the cooling water system, zinc salt is the most commonly used Cathodic corrosion inhibitor, mainly by the zinc ion corrosion inhibition. But should not be used alone, but with polyphosphate, organic phosphate, polyol phosphate, molybdate and other compound synergistic effect, and can reduce their dosage. The amount of zinc ion in the compound corrosion inhibitor is 2~4mg/L. The dosage of zinc salt increases, the corrosion rate decreases, but beyond a certain concentration, the dosage of zinc ion continues to increase, the effect on the corrosion rate is not obvious, but will increase the operation cost and the concentration of zinc ion in the sewage.
Last Update：2022-01-01 08:52:03
ZINC SULPHATE 7H20 - Safety
Open Data Verified Data
non-combustible. Irritant to skin and mucous membrane. Anhydrous and concentrated solution can cause skin ulcers. Inhalation of dust can cause respiratory, digestive and circulatory system dysfunction. Staff should be protected. This product should be stored in a cool and dry place to prevent rain, moisture, prevent sun, heat. They shall not be co-stored and transported with acid, alkali and colored substances.
Last Update：2022-01-01 08:52:03
ZINC SULPHATE 7H20 - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Overview | at room temperature, zinc sulfate heptahydrate is white particles or powder, orthogonal crystal, convergence, is a commonly used astringent, weathering in dry air. When heated to 3 0 ℃, one molecule of crystal water is lost, six molecules of crystal water are lost at 100 ℃, seven molecules of crystal water are lost at 280 ℃, and zinc oxide and sulfur trioxide are formed at 767 ℃. Soluble in water, slightly soluble in ethanol and glycerol. Sealed storage was required. It is mainly used as a raw material for manufacturing zinc barium and other zinc salts, and is also an important auxiliary raw material for viscose fiber and Vinylon fiber. It is also used as printing and dyeing mordant, wood and leather preservative, bone glue clarification and preservation agent, medicine emetic and fungicide, agricultural use as trace element fertilizer. |
| preparation of waste battery | the zinc skin of the battery was peeled, washed and placed in a beaker, cut into small pieces, water was added, concentrated sulfuric acid was added, and heated appropriately. If the zinc skin is dissolved, the zinc skin is supplemented, and the general control of the zinc skin is slightly excessive and the operation is better. The zinc sulfate solution is heated and evaporated, and the crystallized zinc sulfate heptahydrate is dried at 120 ° C. To obtain a dried product. |
| toxicity | see zinc sulfate monohydrate. |
| Use | used as dyeing mordant, wood preservative, paper bleaching agent, also used in medicine, artificial fiber, electrolysis, electroplating, pesticide and production of zinc salt, etc. used in the preparation of zinc supplement, convergence medicine, etc. used as mordant, wood preservative, paper industry bleaching agent, also used in medicine, artificial fiber, electrolysis, electroplating, pesticide and production of zinc salt, etc. zinc sulfate is a supplement of zinc in feed, which is a component of many enzymes, proteins, ribose and so on in animal body, and participates in carbohydrate and fat metabolism, and can catalyze the mutual conversion of pyruvate and lactate, and promote growth. Zinc deficiency can cause incomplete keratosis, dysplasia and hair deterioration, and can affect animal reproduction. zinc sulfate is a permissible food zinc fortifier. China's provisions can be used for salt, the use of mg/kg; In infant food for 113~318mg/kg; In dairy products for 130 ~ 250mg/kg; in cereals and their products 80 ~ 160rag/kg; In drink and milk drink 22.5~44mg/kg. mainly used for artificial fiber coagulation liquid. In the printing and dyeing industry used as mordant, fanlamine Blue Salt dyeing alkali agent. It is the main raw material for the manufacture of inorganic pigments (such as Lithopone), other zinc salts (such as zinc stearate, basic zinc carbonate) and zinc-containing catalysts. Used as wood and leather preservation agent, bone glue clarification and preservation agent. The pharmaceutical industry is used as an emetic. It can also be used to prevent diseases in fruit tree nurseries and to manufacture cables and zinc micro-fertilizer. Food-grade products can be used as nutritional supplements (zinc fortifiers) and the like. substrates for analytical reagents, mordant and phosphors Analytical reagents determination of copper and chlorate by drop analysis. Serum protein test, determination of sulfur content of steel and slag. Coal dye, disinfectant, haploid breeding in the preparation of various media. In plant cell culture, zinc is used as a source to support cell membrane stability and gene regulation. |
| production method | a dilute solution of zinc slag dissolved in 18% sulfuric acid is added to the synthesis reactor, zinc oxide (or a zinc-containing raw material) was added to slurry with stirring. Then, human sulfuric acid was added and the reaction was carried out in an acid-resistant reactor with stirring. The end point of the reaction was controlled to pH 5.1, and the concentration was about 38 Bé. The reaction solution is filtered, heated to 80 ℃, added with zinc powder to replace copper, cadmium, nickel, etc., and then filtered, the filtrate is heated to 80 ℃, add potassium permanganate (or bleaching powder) and heated to boiling, iron, manganese and other impurities are oxidized, after filtration, the filtrate is clarified first, then evaporated to 49~52 ° Bé, after cooling crystallization, centrifugal dehydration, drying, zinc sulfate heptahydrate was obtained. ZnO + H2SO4 → ZnSO4 + H2O In the relative density of 1.16 dilute sulfuric acid slowly added zinc material, temperature control at 80~90 ℃, about 2h after the solution pH value of 5.1~5.4, after completion of the reaction, the relative density of the solution was about 1.35; Then add a small amount of potassium permanganate or bleaching powder to oxidize and precipitate iron and manganese, filter the waste residue, put the filtrate into the replacement barrel, add a small amount of zinc powder, and stir at 75~90 ℃ for 40~50min, replacement of copper, lead, cadmium and other heavy metal impurities. After filtration, the filtrate is oxidized with a small amount of potassium permanganate or bleaching powder to further remove a small amount of iron and manganese, and a zinc sulfate solution with a relative density of 1.28 to 1.32 is obtained by filtration. The solution was cooled and then crystallized in a crystallization pan for 2-3 days. The crystals were separated and dried and dried at 40-50 ° C. To obtain a finished product. ZnO + H2SO4 → ZnSO4 + H2O zinc was slowly added into dilute sulfuric acid with relative density of 1.16, and the temperature was controlled at 80-90 ℃. After 2H, the solution PH reached 5.1-5.4, and the reaction was completed, the relative density of the solution was about 1.35. Then add a small amount of potassium permanganate Lake bleaching powder to oxidize and precipitate iron and manganese, filter the waste residue, put the filtrate into the replacement barrel, add a small amount of zinc powder, stir at 75-90 ℃ for 40-50min, replace copper, lead, chromium and other heavy metal impurities. After filtration, the filtrate is oxidized with a small amount of potassium permanganate or bleaching powder to further remove a small amount of iron and manganese, and the zinc sulfate solution with a relative density of 1.28-1.32 is filtered. This solution is cooled and crystallized in a crystallization pot for 2-3 days, The crystals were separated and dried, followed by drying at 40-50 °c to obtain a final product. |
Last Update：2024-04-09 15:16:52
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Raw Materials for ZINC SULPHATE 7H20
Downstream Products for ZINC SULPHATE 7H20