Molecular Formula | Ca |
Molar Mass | 40.08 |
Density | 1.54g/mLat 25°C(lit.) |
Melting Point | 850°C(lit.) |
Boling Point | 1484°C(lit.) |
Water Solubility | reacts with H2O, alcohols, dilute acids to evolve H2 [MER06] |
Appearance | pieces |
Specific Gravity | 1.54 |
Color | Silver-white |
Odor | Odorless |
Merck | 13,1644 |
BRN | 4241647 |
Storage Condition | water-free area |
Stability | Stable, but reacts with water to release hydrogen and produce calcium hydroxide. Incompatible with strong oxidizing agents, alcohols, moisture. |
Sensitive | air sensitive, moisture sensitive |
Physical and Chemical Properties | Character silver white soft metal. melting point (839±2)℃ boiling point 1484 ℃ relative density 1.54 solubility: soluble in acid, liquid ammonia, slightly soluble in alcohol, insoluble in benzene. |
Use | Widely used in metallurgy, chemical, pharmaceutical, electrical and other industries, iron and steel smelting can be used as deoxidizing and dephosphorization agent, non-ferrous smelting is an excellent reducing agent |
Hazard Symbols | F - Flammable |
Risk Codes | 15 - Contact with water liberates extremely flammable gases |
Safety Description | S8 - Keep container dry. S24/25 - Avoid contact with skin and eyes. S43 - In case of fire use ... (there follows the type of fire-fighting equipment to be used.) |
UN IDs | UN 1401 4.3/PG 2 |
WGK Germany | 1 |
RTECS | EV8040000 |
TSCA | Yes |
HS Code | 28051200 |
Hazard Class | 4.3 |
Packing Group | II |
silver-white metal. The relative density was 1. 54. Melting point (839 2) °c. Boiling point 1484 °c. Soluble in acid, liquid ammonia, slightly soluble in alcohol, insoluble in benzene. The higher the purity, the slower the surface darkening in air. When exposed to strong heat in the air, the combustion of calcium oxide and calcium nitride. Calcium hydride is slowly formed by reaction with hydrogen above 400 °c. At room temperature and water to ease the reaction, the formation of calcium hydroxide protective film, heated with the intense reaction of water to release hydrogen. Chemical properties are very active, with a strong reducing ability, easy with halogen, sulfur, nitrogen and other compounds. Almost all metal oxides can be reduced by heating. Flammable.
The methods for preparing calcium metal include an electrolysis method and a reduction method.
It is used as a deoxidizing agent for alloys, a reducing agent for high-quality metal smelting, a desulfurizing agent and a decarburizing agent for iron and iron alloys, a crystal grain size adjusting agent for special steels, and a cleaning agent for magnesium casting surfaces. For the manufacture of bearing alloy, oil dehydrating agent. Is the production of vitamin A and the production of calcium hydride and other raw materials. It is also used for making various storage batteries, alloy electrodes, and the like.
combustible items in wet condition. Risk code: GB Class 4.3. UN No. 4.3; IMDG Code, pp. The product is packed in a metal barrel or bottle, filled with argon or other sealed packaging. 25,50,100kg net weight per barrel. The outer package is marked with "flammable" and "moisture-proof. Should be stored in a cool, ventilated, dry and non-corrosive atmosphere in the warehouse, no open storage. It is not allowed to contact with water and acid. During the transportation process, it should be waterproof, fire-proof and moisture-proof, and not allowed to be inverted. When loading and unloading, it should be light and light, and the collision of the iron drum is strictly prohibited, so as to avoid damage to the packaging and accidents. Fine powder at room temperature in the wet air can spontaneous combustion, by high heat or contact with strong oxidant, there is the risk of combustion explosion. Can burn eyes and skin. Inhalation of dust can irritate the respiratory tract and lungs, causing Cough, Dyspnea. Irritation of the eye, and even cause burns, causing permanent damage. Contact or inhalation should be immediately removed from the scene to fresh air, and a large number of flowing water to rinse at least 15min, keep the respiratory tract unobstructed, such as Dyspnea, oxygen. If breathing stops, perform artificial respiration immediately. The patient visited hospital. By mistake, people gargle with water and drink milk or egg white. The patient visited hospital. When there is a fire, it can be suppressed by dry sand and dry powder fire. Water is strictly prohibited.