13446-18-9
Magnesium nitrate hexahydrate
CAS: 13446-18-9
Molecular Formula: H12MgN2O12
13446-18-9 - Names and Identifiers
13446-18-9 - Physico-chemical Properties
| Molecular Formula | H12MgN2O12 |
| Molar Mass | 256.41 |
| Density | 1.63 |
| Melting Point | 89 °C |
| Boling Point | 330 °C |
| Flash Point | −26°F |
| Water Solubility | 420 g/L (20 ºC) |
| Solubility | H2O: 1M at20°C, clear, colorless |
| Vapor Presure | 1 mm Hg ( 621 °C) |
| Vapor Density | 6 (vs air) |
| Appearance | turnings |
| Specific Gravity | 1.64 |
| Color | White |
| Merck | 14,5674 |
| BRN | 4948473 |
| PH | 5.0-8.2 (25℃, 50mg/mL in H2O) |
| Storage Condition | 2-8°C |
| Stability | Stable. Strong oxidizer - contact with organic material may lead to fire. Do not store near combustible materials. Incompatible with combustible materials, organics, strong reducing agents. |
| Sensitive | Hygroscopic |
| Physical and Chemical Properties | Vapor Density: 6 (vs air) vapor pressure: 1 mm Hg ( 621 ℃) solubility: H2O: 1 M at 20 ℃, clear, colorless sensitivity: hydrogen WGK Germany:- RTECS:OM3756000 |
13446-18-9 - Risk and Safety
| Risk Codes | R34 - Causes burns R8 - Contact with combustible material may cause fire R36/37/38 - Irritating to eyes, respiratory system and skin. R23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. |
| Safety Description | S43 - In case of fire use ... (there follows the type of fire-fighting equipment to be used.) S7/8 - S37/39 - Wear suitable gloves and eye/face protection S36 - Wear suitable protective clothing. S17 - Keep away from combustible material. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S23 - Do not breathe vapour. S27 - Take off immediately all contaminated clothing. |
| UN IDs | UN 2056 3/PG 2 |
| WGK Germany | - |
| RTECS | OM3756000 |
| FLUKA BRAND F CODES | 3-9 |
| TSCA | Yes |
| HS Code | 28342980 |
| Hazard Class | 8 |
| Packing Group | III |
| Toxicity | LD50 orally in Rabbit: 5440 mg/kg |
13446-18-9 - Reference Information
Open Data Unverified Data
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| toxicity | its dust has damage to the upper respiratory tract, trachea and bronchial mucosa, and its concentrated solution can cause ulcer when it is spattered on the skin. Long-term contact with this product will occur dermatitis. Production workers should wear work clothes, protective masks, latex gloves and other labor protection articles to protect the skin and respiratory organs. Production equipment should be closed and well ventilated. |
| Use | is used as a dehydrating agent for concentration of nitric acid. Raw materials used in the manufacture of explosives, pyrotechnic and other nitrates. For the preparation of catalysts. Used as a strong oxidant. Agricultural use as a wheat ashing agent. analysis reagent, Catalyst, wheat ashing agent, magnesium salt manufacturing, xenon lamp sand cover manufacturing, pyrotechnic, strong oxidant. |
| production method | magnesium oxide method 30% ~ 50% dilute nitric acid is added into the acid-resistant reactor, the reaction was carried out by slow addition of light magnesium oxide with stirring until the solution was neutral. The reaction temperature was maintained below 60 °c. The reaction solution was concentrated by evaporation, cooled to crystallize, centrifuged, and air-dried to obtain a final magnesium nitrate product. The MgO +2HNO3 → Mg(N03)2 + H2O magnesium carbonate method adds 35% ~ 40% dilute nitric acid into the acid-resistant reactor, and slowly adds excess magnesite powder (the main component is magnesium carbonate) under stirring. The carbon dioxide gas evolved from the reaction causes the solution to foam, and the reaction solution rises to 105 to 115 °c due to the heat of reaction, thereby causing loss of nitric acid, maintaining the reaction temperature at 40 to 50 °c. Reaction until the pH value of the solution reaches 4~5, through filtration, evaporation concentration, cooling crystallization, centrifugal separation, air drying, prepared magnesium nitrate product. MgCO3 +2HNO3 → Mg(NO3)2 + H2O + CO2 ↑ |
Last Update：2024-04-09 19:43:38
13446-18-9 - Nature
Open Data Verified Data
colorless crystal, monoclinic system. Melting point about 95 °c; d 1. 464. Deliquescence. Soluble in water, the solution is neutral, soluble in methanol and ethanol, insoluble in ether. Spontaneous combustion will occur after mixing with organic matter. It is the most stable magnesium nitrate hydrate at room temperature. It is Oxidative. Mixing with reducing agent, organic matter, combustible material and metal powder can form explosive mixture, which can cause combustion or explosion by friction, vibration or impact.
Last Update：2025-06-10 22:55:16
13446-18-9 - Preparation Method
Open Data Verified Data
nitric acid was dissolved in water, and Basic Magnesium carbonate trihydrate was added in portions with stirring. After completion of the reaction, the reaction mixture was filtered to remove insoluble matters. The filtrate was concentrated by heating on a water bath. It was allowed to stand at room temperature for several hours. Suction filtration was performed, and the precipitated crystals were washed with a small amount of water. Placed in air and dried naturally, magnesium nitrate hexahydrate was obtained.
Last Update：2025-06-10 22:55:16
13446-18-9 - Application
Open Data Verified Data
It is used as an analytical reagent, a catalyst, a wheat ashing agent, a magnesium salt, and a water purifying agent for water treatment industry.
Last Update：2025-08-19 16:24:40
13446-18-9 - Safety
Open Data Verified Data
rat oral LDso:5440mg/kg; Stimulated rabbit eye 1 mg, severe irritation. Dust is irritating to the upper respiratory tract, causing Cough and shortness of breath. Irritation of the eyes and skin causes redness and pain. Staff should be well protected, if accidentally touch the skin and eyes, should immediately rinse with a large amount of flowing water. This substance may be harmful to the environment and has an accumulation effect in groundwater. Store in a cool, dry and ventilated place. Keep away from fire and heat source. The packaging must be sealed and free from moisture. Should be stored separately from flammable, combustible materials, reducing agents, etc.
Last Update：2025-06-10 22:55:16
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