Calcium Hydroxide 96% (Cas No 1305-62-0)

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Qingdao
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20000 m.t/month

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Product Description:

Specifications  of Calcium Hydroxide 96% (Cas No 1305-62-0)

molecular formula: Ca(OH)2
CAS: 1305-62-0
Appearance: white powder

Properties:

Exquisite white crystalloid powder. A large slightly bitter alkali flavour. Easy to absorb carbon dioxide in the air and become calcium carbonate, hot to 522 °C dehydration into cao. The relative density 2.24 °C (at the same time, melting point 580 dehydrate). Soluble in acid, ammonium salt, glycerin, soluble in water, alcohol, is insoluble in water solution to the skin, alkaline, fabric have corrode action.

Use:

Used as carbon dioxide acidity gas such as absorbing hard water softener, disinfectants, making acid agents. Widely used in pharmaceutical, in organic synthesis.

Details:

Test item

Specification

Reagent grade

Pharmaceutical grade

Appearance

Conform

Conform

Assay /%

≥95.0

≥93.0

Hydrochloric acid /%

≤0.05

≤0.1

Chloride (Cl)/%

≤0.01

≤0.02

sulfur(SO4)/%

≤0.2

≤0.3

Ferric (Fe)/%

≤0.01

≤0.02

Alkali metal and magnesium (MgO)/%

≤0.5

≤0.75

Heavy metal(Pb) /%

≤0.002

≤0.003

Ammonia water insoluble/%

≤0.25

≤0.5

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Q:How to see the whole bread of the alkali alkali small
Look. Cut the dough to see, such as the distribution of uniform distribution of sesame grain size of the hole, indicating that the base is appropriate; such as the emergence of small holes, was slender strip, dough color yellow, that the alkali put more; Uniform macro, dough color dark, that the alkali put less.
Q:What are the characteristics of the composition of the base?
Can provide electronic pairs of substances. (Some salt solution of the pH value is greater than 7, but it is not a base, such as: soda ash (sodium carbonate) Na2CO3, baking soda (sodium bicarbonate) NaHCO3, etc.)
Q:Would you like some rice when you cooked rice or millet gruel?
But there is a situation, that is, in the boiled polenta, corn paste, the production of Wo Wo first corn products, should add a small amount of alkali. This is because the corn contains niacin is very high, but there are 63% to 74% can not be absorbed by the body combined with niacin, long-term consumption of this corn food may occur niacin deficiency - podular disease: dermatitis , Diarrhea and dementia. Early symptoms include lazy weakness, loss of appetite, chapped lips, tongue swelling and pain. If the disease continues to develop, will make the skin in the sun dermatitis, face, hands and feet skin will appear red, long blisters, peeling, brown pigmentation, rough and wrinkles and other symptoms. In order to avoid this situation, the best way is to add some alkali in the corn food, that is, in the boiled polenta, corn batter, do Wo head, the amount of some alkali. This can make the combination of corn in the release of niacin released into a free niacin, alkali-added corn food generally niacin release rate of up to 37% to 43%, and also save vitamin B1 and vitamin B2, very It is good.
Q:Alkali soda water
In 1772, Joseph Plistree published a book, "Combination of Water and Gas," describing the drop of sulfuric acid on chalk, releasing carbon dioxide and encouraging people to collect gas with a bowl full of water. In 1771, the Swedish chemist Luben Bergman independently invented a manufacturing process similar to that of Joseph Plistry's discovery of carbonated water. But less successful, he managed to produce natural bubbling spring water, then think that bubbling spring is good for health. Now, carbonated water is made by pressurized carbon dioxide through water. The pressure of the pressure is stronger than the standard atmospheric pressure, so that it increases the solubility, so that carbon dioxide into the. When the bottle is opened, the pressure is released, the gas forms a bubble out, thus forming a unique bubble. The best known for carbonated water is the advantage of removing stains, such as coffee stains in coffee cups, or silver stains. It is said that the wine stains can be mixed with salt, and then add a lot of carbonic acid to remove. Carbonated water is available at the grocery store and is also very simple. To the supermarket condiment counter bought to eat soda powder. Then prepare a bottle of mineral water. Will be a drink of water cups, put a spoonful of soda powder, how much soda powder can be based on personal taste to set. If put more, too salty, some people can not stand, put less. And then filled with mineral water, pay attention to the water must be cool. Now the living standard is good, every day big fish and meat eat, the body eat into acidic, drink soda can be neutralized in the body acid and alkali balance, good for health. Drink once or twice a week, stick to it, the body will feel particularly cool.
Q:What is the important character of Chinese made alkali?
(1) NH3 + H2O + CO2 = NH4HCO3 (2) NH4HCO3 + NaCl = NH4Cl + NaHCO3 ↓ (3) 2NaHCO3 (heating) = Na2CO3 + H2O + CO2 ↑ That is: ① NaCl (saturated) + NH3 + H2O + CO2 = NH4Cl + NaHCO3 ↓ ②2NaHCO3 = Heating = Na2CO3 + H2O + CO2 ↑ Ammonia reacts with water and carbon dioxide to form a molecule of ammonium bicarbonate, which is the first step. The second step is: ammonium bicarbonate reacts with sodium chloride to form a molecule of ammonium chloride and sodium bicarbonate precipitation, sodium carbonate is precipitated because it is less soluble.
Q:How does the edible base use?
Avoid the food on the lye soak, so as to avoid raw materials rot, as long as the appropriate concentration of alkaline water will be repeated several times the raw material can be;
Q:Does the alkaline battery pollute the environment?
As a result of the community on the misuse of waste batteries, such as: a button battery can pollute 600,000 cubic meters of water, a 5-cell can make a square meter of land is not grass, resulting in some public opinion bias, so that our waste disposable battery recycling And chaos dealing with the work, resulting in some unnecessary waste and mistakes.
Q:Is the plant base a food base?
A basic nitrogen - containing organic compound in a living organism. Most of them exist in plants and are present in animals. With a ring structure, insoluble in water, and acid can form a salt, a certain optical and absorption spectrum, most of the bitter taste, was colorless crystal, a small number of liquid.
Q:What is called alkali recovery
Extraction equipment extraction status is good or bad, largely depends on the extraction of equipment. Different pulp, there are different equipment selection. At present the factory application is the most four series of drum-type vacuum washer. Its technology is mature, easy to operate, from the pulp into the pulp, the basic completion of the separation of pulp and black liquor, the extraction rate is also high. Pulp washing degree and the production of black liquor indicators are basically able to meet the choice of more manufacturers. The disadvantage is the big investment, power consumption.
Q:How to go to the base of the teapot
Many people like to drink tea, but the cup of tea is difficult to remove the tea, tea wall grows a layer of tea, containing cadmium, lead, iron, arsenic, mercury and other metal substances. They are in the tea into the body, and food in the protein, fat and vitamins and other nutritional compounds, resulting in insoluble precipitation, hinder the absorption of nutrients. At the same time, these oxides into the body can cause nerve, digestion, urinary hematopoietic system diseases and dysfunction, especially arsenic, cadmium can cause cancer, causing fetal malformations, health hazards. Therefore, tea drinking habits, should always be timely cleaning tea inside the tea. In order to make you no longer a big headache for the matter, the following describes several ways in addition to tea: (1) remove the metal tea on the tea off, the use of metal tea, Become black, such as with medium-sized cleaning agent can not wash, can be soaked with vinegar, or soaked with bleach can easily peel. (2) to remove the cup or teapot on the tea, cups, teapots with a long time, it will be a lot of tea, with a sponge dipped in salt friction, can be easily removed. (3) in addition to small pieces of tea, can be soaked in bleach or clean powder solution, and place a night, you can remove the tea scale. (4) can be used toothpaste or broken eggshell scrub, and then rinse with water can be.

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