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What are the main uses of Liquid Calcium Chloride?
Liquid calcium chloride has a wide range of uses. In industrial production, it is often used as a snow-melting agent. Because of its low freezing point, it can be sprinkled on the road to quickly melt ice and snow, ensuring smooth travel; it is also used in oil extraction. Injecting it into the stratum can stabilize the well wall and thicken the drilling fluid, which helps to facilitate mining.
In the construction field, it can be used as a concrete antifreeze and early strength agent. During construction in the cold winter, it can not only prevent the concrete from freezing, but also accelerate its hardening and shorten the construction period.
In the food industry, it is an important additive. When used as a coagulant, it is often used in the production of tofu and dried tofu, reacting with soy milk protein to solidify it; as a calcium fortifier, it is added to beverages and nutritious foods to supplement calcium for the human body.
In addition, it can also be used to preserve fruits and vegetables. By adjusting the osmotic pressure, it inhibits the growth of microorganisms, delays the deterioration of food, and prolongs the shelf life. When using it, it is necessary to control the dosage according to different scenarios to ensure safety and effectiveness.
What are the optimum storage conditions for Liquid Calcium Chloride?
Liquid calcium chloride should be stored properly according to its characteristics.
Because it is corrosive and hygroscopic, it is advisable to choose a corrosion-resistant container, such as a plastic barrel or a specific stainless steel storage tank, which should be sealed tightly to prevent leakage and volatilization.
The storage place should be dry, cool and well-ventilated, away from direct sunlight and high temperature environment, because high temperature can easily cause its concentration to change and aggravate volatilization, which will damage its effectiveness over time.
It must not be mixed with alkalis and oxidants to prevent biochemical reactions; it should also be placed separately from food and daily necessities to ensure safety.
The storage floor should be raised and several inches away from the wall to prevent ground moisture from eroding the container. Check the storage status regularly. If the container is damaged or the liquid is turbid and discolored, it should be disposed of in time.
In this way, the quality of liquid calcium chloride is stable and worry-free in the future.
How to detect the concentration of Liquid Calcium Chloride?
The concentration of liquid calcium chloride can be detected by the classic method.
The first is the chemical titration method. Take a quantitative test solution, drop the chrome black T indicator, and its color changes to purple-red. Then slowly titrate with the disodium ethylenediaminetetraacetic acid (EDTA) standard solution. EDTA complexes with calcium ions. When the solution changes from purple-red to pure blue, record the amount of EDTA used. The concentration of calcium chloride can be calculated by the stoichiometric relationship of the chemical reaction. This is the principle of "measure quality by dosage and infer concentration by quantity".
The second is the physical measurement method, using a density meter to measure the density of the liquid. The concentration of calcium chloride is related to the density. Prepare a concentration-density standard curve. After measuring the density of the test solution, you can know its concentration by comparing the curve. Or use a refractometer to measure the refractive index of the liquid. Similarly, convert it according to the standard curve.
The two methods have their own strengths. The chemical method is accurate and the physical method is convenient. When testing, standardize the operation and take the average value to ensure reliable results to show the concentration of liquid calcium chloride.
What is the dosage standard for Liquid Calcium Chloride in different industries?
The amount of liquid calcium chloride used in various industries has rules to follow.
For road melting, it depends on the thickness of ice and snow and the temperature. Usually 10-30 grams per square meter is applied. In severe cold, it can be increased to melt ice quickly and ensure smooth traffic. In construction, it is used as a concrete antifreeze and early strength agent. The amount is about 2%-5% of the cement mass, which helps the concrete to solidify quickly in the cold winter and avoid the risk of freezing damage.
When used in the food industry, it must strictly abide by the national standard. For example, when making tofu and dried bean curd, about 100-300 grams are used per 100 kilograms of soy milk as a coagulant. Less is difficult to solidify, and more tastes bitter; when added to beverages as a calcium fortifier, the amount per liter is no more than a few grams. It is precisely formulated according to product needs to supplement calcium and preserve flavor.
For fruit and vegetable preservation, 0.5%-1% concentration solution is often used for soaking to inhibit microorganisms and extend the freshness of food.
All industries should follow the standard when using it, and the amount should be appropriate so that they can be used to their full potential and ensure effectiveness and safety.
What happens when Liquid Calcium Chloride is mixed with other chemicals?
When liquid calcium chloride is mixed with other substances, it will undergo numerous changes, mostly following the laws of chemistry.
When it encounters alkalis, such as sodium hydroxide, calcium ions combine with hydroxide to produce calcium hydroxide precipitates, which look like cotton wool; when it encounters carbonates, such as sodium carbonate, calcium carbonate is immediately generated, which is white and hard and sinks to the bottom of the container. If it is mixed with sulfates, calcium sulfate will gradually precipitate, because it is slightly soluble, or it will become fine crystals and suspend.
When it encounters phosphates, such as trisodium phosphate, calcium phosphate is quickly generated, which is difficult to dissolve in water; when it encounters silver nitrate, silver chloride precipitates immediately, which is white and stable. When it is placed with alcohols, its solubility may change due to complexation, and it is often accompanied by heat release when mixed, because calcium chloride releases heat when it encounters water, and the reaction of other substances may help it.
When it encounters ammonium salts, if the system is alkaline, ammonia gas will escape, which is pungent and unpleasant; when it is neutral, there is usually no significant change.
When mixing substances, one must first know their properties and what to avoid, to avoid sudden precipitation, sudden accumulation of heat or the growth of poisons, to ensure safety.