Customs code 2828100000
Physical and chemical properties of bleaching powder
Density 2.35
Melting point 100ºC
Molecular formula: CaCl2O2
Molecular weight 142.983
Exact mass 141.890121
PSA 18.46000
LogP 1.24220
Appearance: white powder with a smell like chlorine
Refractive index 1.545 (20ºC)
Storage conditions
1. Separated from organic materials, flammable materials, explosive materials, reducing agents, poisons, acids, etc. During storage and transportation, do not expose to direct sunlight or rain. It should not be stored for a long time. If stored for one year, the loss is about 6% ~ 12%. If the iron bucket is damaged, electric welding cannot be used, and soldering should be used. Handle with care when loading and unloading, do not roll. In case of fire, yellow sand and carbon dioxide fire extinguishers can be used to extinguish the fire. Firefighters should wear gas masks or respirators.
2. Storage precautions Store in a cool, ventilated warehouse. Keep away from fire and heat sources. The storage temperature does not exceed 30 ℃, and the relative humidity does not exceed 80%. Packaging is required to be sealed and not in contact with air. It should be stored separately from reducing agents, acids, flammable materials, etc., and should not be mixed. Should not be stored in large quantities or for a long time. The storage area should be equipped with suitable materials to contain spills.
Stability
1. Exposure to the air, it is easy to absorb water, carbon dioxide (or meet inorganic acids) and liberate hypochlorous acid and chlorine gas. Hypochlorous acid then decomposes to generate hydrogen chloride and new ecological oxygen, which has bleaching effect. In the presence of nickel, cobalt, iron, copper, manganese and other metal ions, it can promote its decomposition. Has disinfection and sterilization capabilities. It is a strong oxidant. Because it contains calcium chloride in the composition, it is easy to absorb moisture and its properties are extremely unstable. It can be deteriorated by sunlight, heat and acidity, which reduces the effective chlorine content. When mixed with organic matter and flammable liquid, it can generate heat and spontaneously ignite, and it will explode under high heat. poisonous!
2. The main ingredient is calcium hypochlorite, which contains a small amount of calcium chloride and calcium hydroxide. Its effective chlorine content is 60% to 70%. Easily soluble in water, it emits a lot of heat and primary ecological oxygen when it meets water. Explosive decomposition caused by heating can release chlorine gas when reacting with acid. It can cause combustion when reacting with organic matter and oils. It is easy to decompose and explode when exposed to light and produce oxygen and chlorine gas. Because calcium chloride and water content are low, its stability is higher than bleaching powder, and it does not decompose when stored at room temperature for more than 200 days. After one year of storage, the available chlorine content decreased by 6.6%, and after three years, it decreased by 14%.
3. Easily soluble in water (27g / 100cm3, 0 ° C) and insoluble in ethanol. Oxidant. Disproportionation into CaCl2 and Ca (ClO3) 2 in aqueous solution. Decomposes into CaCl2 and O2 when heated. Corrosive and irritating.
4. Stability Stability
5. Incompatible materials Strong reducing agent, strong acid, ammonia, flammable or combustible, water
6. Conditions to avoid exposure to heat, light and humid air
7. Polymerization hazards
8. Decomposition products: chloride, calcium oxide
Water solubility 200 g / L (20 ºC) (dec.)
Computational Chemistry
1. Hydrophobic parameter calculation reference value (XlogP): None
2.Number of hydrogen bond donors: 0
3.Number of hydrogen bond acceptors: 2
4.Number of rotatable chemical bonds: 0
5.Number of tautomers: none
6. Topological molecular polar surface area 46.1
7.Number of heavy atoms: 5
8.Surface charge: 0
9.Complexity: 2
10.Number of isotope atoms: 0
11. Determine the number of atomic stereocenters: 0
12. Uncertain number of atomic stereocenters: 0
13. Determine the number of chemical bond stereocenters: 0
14. Uncertain number of chemical bond stereocenters: 0
15.Number of covalent bond units: 3
More
1. Properties: white powder with strong chlorine odor. Its solution is a yellow-green translucent liquid.
2. pH value: 11.5 (5% solution)
3. Melting point (° C): 100 (decomposed)
4. Relative density (water = 1): 2.35
5. Relative vapor density (air = 1): 6.9
6. Octanol / water partition coefficient: -2.460
7. Solubility: soluble in water, insoluble in ethanol.
China (Mainland)
