Magnesio
Magnesium
CAS: 7439-95-4
Molecular Formula: Mg
Magnesio - Names and Identifiers
Magnesio - Physico-chemical Properties
| Molecular Formula | Mg |
| Molar Mass | 24.31 |
| Density | 1.74 g/mL at 25 °C (lit.) |
| Melting Point | 648 °C (lit.) |
| Boling Point | 1090 °C (lit.) |
| Flash Point | −26°F |
| Water Solubility | REACTS |
| Solubility | H2O: 1M at20°C, clear, colorless |
| Vapor Presure | 1 mm Hg ( 621 °C) |
| Vapor Density | 6 (vs air) |
| Appearance | turnings |
| Specific Gravity | 1.74 |
| Color | White |
| Exposure Limit | ACGIH: TWA 2 ppm; STEL 4 ppmOSHA: TWA 2 ppm(5 mg/m3)NIOSH: IDLH 25 ppm; TWA 2 ppm(5 mg/m3); STEL 4 ppm(10 mg/m3) |
| Merck | 14,5674 |
| BRN | 4948473 |
| Storage Condition | Store below +30°C. |
| Sensitive | Hygroscopic |
| Physical and Chemical Properties | The character is silvery white metal (hexagonal system). melting point 648.5 ℃ boiling point 1107 ℃ relative density 1.74 solubility soluble in inorganic acids, ammonium salts, insoluble in cold water, chromic anhydride, alkali. |
| Use | Used for automobile, aircraft, rocket manufacturing raw materials |
Magnesio - Risk and Safety
| Risk Codes | R34 - Causes burns R15 - Contact with water liberates extremely flammable gases R11 - Highly Flammable R17 - Spontaneously flammable in air R36/37/38 - Irritating to eyes, respiratory system and skin. R22 - Harmful if swallowed R19 - May form explosive peroxides R40 - Limited evidence of a carcinogenic effect R36/37 - Irritating to eyes and respiratory system. |
| Safety Description | S43 - In case of fire use ... (there follows the type of fire-fighting equipment to be used.) S7/8 - S43A - S36 - Wear suitable protective clothing. S33 - Take precautionary measures against static discharges. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37 - Wear suitable protective clothing and gloves. S16 - Keep away from sources of ignition. |
| UN IDs | UN 2056 3/PG 2 |
| WGK Germany | 1 |
| RTECS | OM3756000 |
| FLUKA BRAND F CODES | 3-9 |
| TSCA | Yes |
| HS Code | 81049000 |
| Hazard Class | 4.1 |
| Packing Group | III |
Magnesio - Upstream Downstream Industry
| Downstream Products | Magnesium arsenate 3-hydroxy-2-methyl-4-pyrone Azocyclotin Magnesium chloride Phenprobamate Acetylpyrazine 2-Acetyl-3-methylpyrazine |
Magnesio - Nature
Open Data Verified Data
silver-white metal (hexagonal system). Melting point 648.5 °c. Boiling point 1107 °c. Relative density 1_74. Soluble in inorganic acids, ammonium salts, insoluble in cold water, chromic anhydride, alkali. In hot water decomposition of magnesium hydroxide. No loss of gloss in dry air, but in moist air
Oxidized to gray oxide film. The block is stable at room temperature, but the powder and debris are dangerous for fire, and attention should be paid to the treatment. In the case of high temperature, the bulk is easy to oxidize and burn, and the heat treatment and the like should be performed under the protection of sulfur dioxide or sulfur hexafluoride atmosphere.
Last Update：2024-01-02 23:10:35
Magnesio - Preparation Method
Open Data Verified Data
- milling method: the magnesium ingot is milled into the required particle size, and the finished magnesium powder is obtained by screening and grading. Process Diagram: magnesium ring one pickling one car end face one milling one wind Twitch separation one sieve classification one magnesium powder of different specifications one Mixer One packaging one inspection acceptance one finished product.
- salt coating method: used for the production of granular magnesium powder. Process Diagram: mixing of magnesium ingot and potassium chloride-melting-stirring and releasing one magnesium particle and molten salt-jaw crushing-pulverizer crushing one screening one magnesium particle one packaging one finished product.
- Non-overburden method: it is also used for the production of granular magnesium powder. Process Diagram: magnesium ingot-milling-vortex pulverizer crushing-wind conveying-screening-inspection-Packaging-finished product.
Last Update：2022-01-01 11:06:15
Magnesio - Use
Open Data Verified Data
for the manufacture of pyrotechnic and signal flares. It is used as a reducing agent, making flash powder, lead alloy, as a sulfur removal agent and a purifying agent in metallurgy, and in addition, it is used as a dehydrating agent for organic synthesis or an organic compound for preparing magnesium directly from magnesium powder. Especially in recent years, magnesium powder is used more and more in the spraying and anti-corrosion industry, and it is also used in the single crystal silicon, polycrystalline silicon and Metallurgical Powder die casting.
Last Update：2022-01-01 11:06:14
Magnesio - Safety
Open Data Verified Data
wet combustible. Risk code: GB4.3 class 43012. UN N0 1418; IMDG code 4.3, Class 2. Packed with an iron drum, an aluminum drum or a woven bag lined with a polyethylene plastic bag, tie the mouth of the plastic bag tightly and seal it. Aluminum or iron barrels should be strong and sealed. The inner surface of the packaging barrel made of black iron skin shall be coated with aluminum powder, and the outer surface shall be painted. Woven bags should be strong and durable and can prevent static electricity. The package is marked with "flammable" and "moisture-proof. Should be stored in a cool, ventilated, dry warehouse. It shall not be stored in combination with inorganic acids and flammable materials. During the transport process to prevent rain and sun exposure, and the transport tools to do a good job of anti-static protection, not allowed to fire close. When loading and unloading should be light, no collision, to prevent packaging damage. Magnesium dust can cause Dyspnea, chest pain, Cough, diffuse pulmonary interstitial fibrosis with emphysema. Production personnel should wear work clothes, masks and other labor protection products, to protect the respiratory organs and skin. The equipment should be closed, and the production workshop should be well ventilated. When there is a fire, it is strictly prohibited to use water, foam, carbon dioxide, and dry sand. During the rescue, the skin of the eyes should be protected to avoid burning of the body and the visual acuity with magnesium light.
Last Update：2022-01-01 11:06:16
Magnesio - Reference Information
| resistivity | 4.46 ***-CM, 20°C |
| crystal structure | HCP, Space Group P63/mmc |
| LogP | -0.57 at 20℃ |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| toxicity | magnesium powder dust can cause Dyspnea, chest pain, Cough, pulmonary diffuse interstitial fibrosis and emphysema. Production personnel should wear work clothes, masks and other labor protection products, to protect the respiratory organs and skin. The equipment should be closed, and the production workshop should be well ventilated. |
| Application | is mainly used in the manufacture of light magnesium alloy, can also be used as deoxidizing agent and reducing agent in metallurgy, magnesium powder can be used as flash powder, for the manufacture of pyrotechnic and signal flares. used as an experimental reagent, also used in organic synthesis used as a reducing agent, also used in the manufacture of flash powder used for oil antioxidants, food additives and some pharmaceutical intermediates reducing agent. Manufacture of flash powder. Light alloy raw materials. Metallurgical desulfurizer and Deoxidizer. Optical lens. Production of magnesium salts. Preparation of Grignard reagent, spectral analysis. reducing agent, manufacturing flash powder, light alloy raw materials, metallurgical desulfurization agent, deoxidizer, optical mirror, manufacturing magnesium salt, manufacturing Grignard reagent, spectral analysis. Used for automobile, aircraft, rocket manufacturing raw materials. |
| production method | milling the magnesium ingot to the required particle size, after screening and grading, the magnesium powder product is prepared. |
| category | flammable articles in water |
| explosive hazard characteristics | explosive in water |
| flammability hazard characteristics | flammable in air; Flammable hydrogen generated with water and acid |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; Stored separately from oxidants and acids |
| extinguishing agent | graphite powder, dry sand |
| spontaneous combustion temperature | 950 ° F. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-07-10 10:15:41
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