Name | Calcium nitrate tetrahydrate |
Synonyms | Calcium nitrate 4H2O Calcium nitrate hydrate Calcium nitrate, 4-hydrate Calcium nitrate tetrahydrate calciumdinitratetetrahydrate CALCIUM (II) NITRATE, HYDROUS |
CAS | 13477-34-4 |
EINECS | 233-332-1 |
InChI | InChI=1/Ca.NO3.4H2O/c;2-1(3)4;;;;/h;;4*1H2/q+2;-1;;; |
Molecular Formula | Ca(NO3)2 4H2O |
Molar Mass | 236.14 |
Melting Point | 45℃ |
Water Solubility | 1470 g/L (0℃) |
Physical and Chemical Properties | Solubility: H2O: 1 M at 20 °c, clear, colorless storage conditions: Store at RT. sensitivity: hygropic WGK Germany:1 RTECS:EW3000000 |
Hazard Symbols | O - Oxidizing agent Xi - Irritant |
Risk Codes | R36 - Irritating to the eyes R8 - Contact with combustible material may cause fire |
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. S39 - Wear eye / face protection. |
UN IDs | UN 1454 |
Calcium nitrate tetrahydrate is a white crystalline solid with the chemical formula Ca(NO3)2·4H2O. It is easily soluble in water at room temperature, forming an alkaline solution. Calcium nitrate tetrahydrate is an important calcium nitrate salt, commonly used as a fertilizer, pesticide, fuel additive, and refrigerant.
The preparation of calcium nitrate tetrahydrate is typically done by reacting nitric acid with calcium carbonate: CaCO3 + 2HNO3 → Ca(NO3)2 + CO2 + H2O.
Some of the main uses of calcium nitrate tetrahydrate include:
1. Agriculture: Used as a nitrogen and calcium fertilizer to provide essential nutrients for plant growth.
2. Industrial applications: Utilized as a metal surface treatment agent, fireworks fuel, fire retardant, and concrete additive.
3. Refrigerant: Calcium nitrate solution can be used as a working fluid in refrigeration systems.
Calcium nitrate tetrahydrate has some hazards and safety precautions should be observed. Avoid contact with organic materials and refrain from ingestion or inhalation. Prolonged exposure may cause skin allergy reactions. Protective gloves and goggles should be worn when handling. Store in a sealed, cool, well-ventilated environment.
colorless crystals. Deliquescence. Melting point of 45 deg C; D1860. Soluble in water, ethanol, methanol, acetone, almost insoluble in nitric acid. The pH of the 5% aqueous solution (on an anhydrous basis) was 6.0. Strong oxidant. Thermal decomposition, release of oxygen. Mixing with reducing agents, organics, combustibles such as sulfur, phosphorus, or metal powders, etc., can form explosive mixtures. Combustion decomposition, the release of toxic nitrogen oxide gas. By high heat decomposition, produce toxic nitrogen oxides.
The powdered calcium hydroxide was added in small portions to the ammonium nitrate solution, heated and continuously stirred, and the heating was stopped when the weak ammonia odor was just eliminated. After filtration, nitric acid was added dropwise to the filtrate until the filtrate was weakly acidic. Heating to 40~50 C, and then filtered, the filtrate was concentrated, and a little calcium nitrate tetrahydrate was added as a seed crystal, cooled to room temperature, and the crystal was suction filtered, that is, calcium nitrate tetrahydrate.
analysis reagent for detecting sulfate and oxalate. For the preparation of basic culture medium, pyrotechnic materials.
rat oral LDso:3900mg/kg. The eyes, skin irritation, inhalation of dust, the nose, throat and respiratory tract irritation, causing Cough and chest discomfort. It is strictly prohibited to mix with acids, flammable substances, organic substances, reducing agents, spontaneous combustion substances and wet flammable substances.