perchloratedemagnesium[french]
magnesium perchlorate
CAS: 10034-81-8
Molecular Formula: 2ClO4.Mg
perchloratedemagnesium[french] - Names and Identifiers
perchloratedemagnesium[french] - Physico-chemical Properties
| Molecular Formula | 2ClO4.Mg |
| Molar Mass | 223.2 |
| Density | 2,21 g/cm3 |
| Melting Point | 251 °C |
| Water Solubility | Magnesium perchlorate is soluble in water, ethanol. |
| Solubility | Ethanol (Slightly), Water (Slightly) |
| Vapor Presure | 0Pa at 25℃ |
| Appearance | Solid |
| Specific Gravity | 2.21 |
| Color | White |
| Merck | 14,5678 |
| Storage Condition | Hygroscopic, Room Temperature, Under inert atmosphere |
| Stability | Stable, but moisture sensitive. Oxidizer - contact with combustible material may lead to fire. Incompatible with reducing agents, organic materials, trimethyl phosphate, powdered metals, strong acids, |
| Sensitive | Hygroscopic |
| Use | Used as a gas desiccant and catalyst |
perchloratedemagnesium[french] - Risk and Safety
| Risk Codes | R8 - Contact with combustible material may cause fire R36/37/38 - Irritating to eyes, respiratory system and skin. R14/15 - |
| Safety Description | S17 - Keep away from combustible material. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S27 - Take off immediately all contaminated clothing. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S43 - In case of fire use ... (there follows the type of fire-fighting equipment to be used.) S7/8 - |
| UN IDs | UN 1475 5.1/PG 2 |
| WGK Germany | 3 |
| RTECS | SC8925000 |
| FLUKA BRAND F CODES | 3-10 |
| TSCA | Yes |
| HS Code | 28299010 |
| Hazard Class | 5.1 |
| Packing Group | II |
| Toxicity | LD50 ipr-mus: 1500 mg/kg JAFCAU 14,512,66 |
perchloratedemagnesium[french] - Nature
Open Data Verified Data
colorless orthorhombic crystal system, needle-like or plate-like crystal or powder. Bitter in taste. Relative density 1. 80 (25 ℃). Melting point 35 °c. Boiling point 120 degrees C (decomposition). Soluble in water, slightly soluble in alcohol and acetone. Partial melting and conversion to tetrahydrate at 35 °c. Strong hygroscopicity. Not prone to explosion and combustion. More stable than other chlorate, mixed with sulfur, phosphorus, organic matter, etc., by friction, impact, have caused the risk of explosion combustion. The loss of oxide film of iron has significant corrosion, corrosion of stainless steel and enamel is not significant.
Last Update：2024-01-02 23:10:35
perchloratedemagnesium[french] - Preparation Method
Open Data Verified Data
double decomposition method: the nearly saturated solution of sodium chlorate was added to the processor, preheated to about 90 ° C., added with barium chloride to remove the chromate in the solution, and then sent to the reactor, and magnesium chloride was added for double decomposition reaction. Then add barium chloride and potassium permanganate saturated solution, remove from the halogen block
After the sulfate and ferrous salt are brought in, the precipitate is filtered out, and when the filtrate is evaporated to 116~123 ℃, a large amount of sodium chloride is precipitated, which is immediately removed by hot filtration, the filtrate was fed to the crystallizer and the unreacted sodium oxyhydroxide was separated at about 35 °c. The refined solution of magnesium chlorate is concentrated by evaporation at 140~145 ℃ and then cooled to obtain the finished product of magnesium chlorate.
Last Update：2022-01-01 11:00:20
perchloratedemagnesium[french] - Use
Open Data Verified Data
used as defoliant, wheat ripening agent, herbicide, herbicide and desiccant before cotton harvest. It is also used as a medicinal product.
Last Update：2022-01-01 11:00:19
perchloratedemagnesium[french] - Safety
Open Data Verified Data
lined with plastic bags or two layers of kraft paper bags, sealed, outside the full opening or opening of the steel drum packaging; Or threaded mouth glass bottles, iron cover pressure mouth glass bottles or plastic bottles outside the ordinary wooden box. Glass bottles, each bottle of 0. 5kg net weight. External use of wooden box packaging, each box containing 10 bottles. Package shall be marked with "oxidant. It belongs to Class II inorganic oxidant, with Hazard code number: GB 5.1 class 51032. UN N0.2732IIMDG CODE 51589 Category 1. Should be stored in a cool, ventilated, dry warehouse. Keep away from fire and heat source. Packaging should be sealed and moisture-proof. It is strictly prohibited to mix with acids, flammable substances, organic substances, reducing agents, spontaneous combustion substances and wet flammable substances. During transportation, it is necessary to prevent rain and sun exposure, and vibration, impact and friction are prohibited. When loading and unloading should be light to prevent packaging rupture. In case of fire, a large amount of water can be used to suppress the fire, and at the same time, a dry powder extinguishing agent is used. Toxicity and protection: LD0 6438mg/kg (rat, oral), ld505235 mg/kg (mouse, oral). This product is combustion-supporting. Irritant to the respiratory tract I is a methemoglobin-forming agent. After exposure to Head Pain, dizziness, weakness; High concentrations can cause respiratory disorders, collapse and even death. 20% or 40% magnesium chlorate solution on the skin, can make the skin red and have a burning pain, should be immediately washed with water for more than 15min; Suffering from acute dermatitis, can be washed with lead water lotion, boric acid solution, apply neutral ointment; If you accidentally splash into the eye, wash with cold boiled water for more than 15min, with 30% of the sulfa acetyl drops into the eye. The maximum allowable concentration is recommended to be 10 mg/m3. This substance may be harmful to the environment, and special attention should be paid to the water body. The production process is closed and ventilation is enhanced. Dust should be avoided. Avoid contact with reducing agents. Safe shower and eye wash available. Production personnel should wear work clothes, masks, latex gloves and other labor protection articles to protect the respiratory organs and skin. Cotton picking before the application of medicine, at least 7 days before the start of work.
Last Update：2022-01-01 11:00:21
perchloratedemagnesium[french] - Reference Information
| LogP | -6.53 at 25℃ |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| solubility in water (g/100ml) | grams dissolved per 100ml of water: 49.6g/20 ℃ |
| Application | used as a gas desiccant and catalyst anhydrous magnesium perchlorate, white porous particles, with strong water absorption, it is an ideal desiccant for domestic or imported infrared carbon, sulfur and hydrogen, oxygen, nitrogen and other gas analysis instruments in the field of metallurgy. It is also suitable for dehydrating agents for gas purification. |
| production method | 1. Hydrate magnesium perchlorate is evaporated by heating to solidification (ca 145oC), heated with rapid stirring and continued to 170-200oC (not to exceed 230oC), the resulting molten salt is kept for 2-H, cooled and pulverized, dry at 170OC for 2-3H at 13.33PA, then warm to 220-240OC for 3H to obtain anhydrous magnesium perchlorate. The crystalline hydrate of magnesium perchlorate was prepared by heating on a hot plate in a porcelain dish. When heated to 145-147 °c, it was melted in its own crystallization water. As the water evaporates, the liquid solidifies into a porous-like substance (trihydrate). Therefore, it should be vigorously stirred, and then heated to 170~200 degrees C (not to exceed 230 degrees C), the molten salt is stored at this temperature for 1~2H. After cooling, the mixture was crushed into small pieces of 3-4mm in diameter, placed in a round-bottom flask, and connected to a vacuum pump (with a CaCl2 drying tower in the middle). Heating to 170 °c for about 2-3H under a pressure of 13 μ3pa, followed by heating to 220-240 °c for 3H. Products should be stored in closed bottles. 3. Preparation Method: Add chemically pure magnesium oxide to chemically pure perchloric acid with a content of 30% to make it saturated, filter out undissolved magnesium oxide, stir the filtrate, and add perchloric acid to Congo red to react weakly acidic: then the reaction liquid is heated until the crystal film appears, the crystal is cooled, the obtained crystal is filtered, dissolved with hot water, insoluble matters are filtered off, and then evaporated and concentrated until the crystal is thin, and the crystal is cooled, the resulting crystals were spin-dried, I .e., hydrated magnesium perchlorate. The mother liquor is concentrated by re-evaporation and crystallized, and the finished product can also be obtained. |
| category | oxidant |
| toxicity grade | poisoning |
| Acute toxicity | intraperitoneal-mouse LD50: 1500 mg/kg |
| explosive hazard characteristics | , mixed with sugar, or contact Hot Copper tube initiation; In case of organic matter, reducing agent, sulfur, combustible materials such as phosphorus can be exploded |
| flammability hazard characteristics | prone to ignition by friction; Flammable in case of organic matter, reducing agent, sulfur, phosphorus and other flammable substances and metal powder; toxic chloride smoke from combustion |
| storage and transportation characteristics | warehouse ventilation; Light loading and unloading; And organic matter, reducing agent, separate storage of sulfur and phosphorus combustibles |
| fire extinguishing agent | water and sand mist |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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