Calcium gluconate solubility, solubility of calcium sulfate

Chinese name: Calcium salt of d-gluconate (2:1); calcium gluconate (medicinal); calcium gluconate; calcium gluconate hydrate; Calcium Gluterate English Name:

calcium gluconate；calcicol；calciofon；calcipur；calcium d-gluconate；calcium glyconate；calcium hexagluconate；Calglucol Description: White crystalline or granular powder. Melting point 201 (decomposition).

Soluble in water (3g 100ml, 20), soluble in boiling water (20g 100ml), aqueous solution pH about 6-7. Insoluble in ethanol and other organic solvents. As a drug, it can reduce capillary permeability, increase density, maintain the normal excitability of nerves and muscles, strengthen myocardial contractility, and help bone formation.

Suitable for allergic diseases such as urticaria; Eczema; Pruritus; contact dermatitis, as well as serum sickness; Angioedema as an adjunct**. It is also indicated for convulsions and magnesium poisoning caused by hypocalcemia. It is also used for the prevention and prevention of calcium deficiency.

as a food additive, used as a buffer; Curing agent; chelating agents; Nutritional supplements. According to the "Hygienic Standards for the Use of Food Nutrition Enhancers" (1993) promulgated by the Ministry of Health of China, it can be used for cereals and their products, beverages, and its dosage is 18-38 grams and kilograms.

White crystalline or granular powder, melting point 201 (decomposition), odorless, tasteless, soluble in boiling water (20g 100ml), slightly soluble in cold water (3g 100ml, 20), insoluble in ethanol.

or organic solvents such as ether. The aqueous solution is neutral (pH about 6-7).

The solubility of calcium sulfate in water increases with the increase of temperature, but the solubility remains basically unchanged in a certain temperature range. For example, at a temperature of 20, the solubility of calcium sulfate is that when the temperature rises to 100, the solubility increases to.

The solubility of calcium sulfate is also related to the presence of other chemicals in the solution. For example, when a solution contains chlorides such as sodium chloride or ammonium chloride, the solubility of calcium sulfate decreases because these compounds form insoluble calcium chloride or ammonium chloride with calcium sulfate.

Calcium sulfate has a wide range of applications in industry. For example, it can be used as a building material, added to cement to enhance its properties; It can also be used as a food additive for coagulation of almond tofu, cheese and other lead-eating products. In addition, calcium sulfate can also be used to purify sewage and for semiconductor production in the electronics industry.

Calcium sulphate.

Glucose is dissolved 154 g in 100 ml of water at 15 degrees Celsius.

It is the most widely distributed monosaccharide in nature. Glucose contains five pre-rotten hydroxyl groups and one aldehyde group, which has the properties of multiple repentant alcohols and aldehydes. It is easy to decompose when heated under alkaline conditions, and should be stored in a closed manner.

Under dry conditions, glucose has good stability and the aqueous solution can be autoclaved. Overheating can lead to a drop in pH and caramelization of the solution.

Chemical properties: Glucose is chemically an organic substance, the so-called organic matter is a carbohydrate formed by different molecular weights of carbon, hydrogen and oxygen. Glucose is a monosaccharide, which is the most important substance in the human body, participating in the metabolic transformation of the three major substances of the human body, participating in the energy supply of the human body, participating in the energy supply of the brain, participating in the energy supply of muscles, etc.

Therefore, glucose is a very important substance for the human body. The glucose in the blood of the human body needs to be maintained within a stable concentration range in order to ensure the normal operation of the human body.

Application field: the growth of microorganisms requires a suitable carbon and nitrogen ratio, glucose as the carbon source of microorganisms, is the main material of fermentation medium, such as antibiotics, monosodium glutamate, vitamins, amino acids, organic acids, enzyme preparations, etc., glucose needs to be used in large quantities, and can also be used as raw materials for microbial polysaccharides and organic solvents.

At present, crystalline glucose is mainly used in the food industry, with the improvement of living standards and the continuous development of science and technology in the food industry, the application of glucose in the food industry is becoming more and more extensive, and the food industry is still the largest market for a long time in the future. <>

The molecular formula of calcium gluconate is Ca(C6H11O7)2, usually containing 1 molecule of crystal water, the molecular formula becomes C12H22CaO14 H2O, natural glucose, basically belongs to the D configuration, the structural formula of D-calcium gluconate monohydrate is as follows:

The chemical formula of calcium gluconate is Ca(C6H11O7)2

Hope it helps! Hope!

Calcium gluconate, the molecular formula is Ca(C6H11O7)2, generally contains a molecule of crystal water, so it is often called Ca(C6H11O7)2*H2O

From the perspective of decomposition, glucose can be written, CH2OH-(CHOH)4-CH0, from which it can be seen that glucose is both aldehyde and alcohol, then the oxidized aldehyde group becomes acid, and then there is a reaction between acid and calcium hydroxide, that is, calcium gluconate is obtained.

The chemical formula of calcium gluconate is Ca(C6H11O7)2According to the relative atomic mass ca-40, c-12, h-1, o-16, the formula can be obtained: 40 + (6 x 12 + 1x11 + 16 x7) x2 = 430.

So the chemical formula amount of calcium gluconate is 430.

Hello! Method Name: Determination of calcium gluconate—neutralization titration.

Applications: This method uses titration to determine the content of calcium gluconate. This method is suitable for calcium gluconate.

Method principle: The test sample was dissolved by adding water to a slight heat, adding sodium hydroxide test solution and calcium-purple red indicator, and titrating solution with disodium ethylenediaminetetraacetic acid (titrated until the solution changed from purple to pure blue. Read out the amount of ethylenediaminetetraacetic acid disodium titration solution and calculate the content of calcium gluconate.

Reagents: 1Water (freshly boiled to room temperature) 2

Disodium ethylenediaminetetraacetic acid titration solution ( Benchmark calcium gluconate 4Sodium hydroxide test solution 5Calvipin Indicator:

Take calciferorubin, add 10g of anhydrous sodium sulfate, grind evenly, and obtain.

Instruments and equipment: Sample preparation: 1Ethylenediaminetetraacetic acid disodium titration solution (Preparation:

Take 19g of disodium ethylenediaminetetraacetic acid, add freshly boiled cold water to make 1000ml, and shake well. Calibration: take the benchmark calcium gluconate from 800 burnt to constant weight, weigh it accurately, add 3ml of dilute hydrochloric acid to dissolve, add 25ml of water, add 1 drop of ethanol solution of methyl red, add ammonia test solution dropwise until the solution is slightly yellow, add 25ml of water and ammonia-ammonium chloride buffer (, add a small amount of chromium black T indicator, titrate with this solution until the solution changes from purple to pure blue, and the titration results are corrected with a blank test.

Per 1 ml of ethylenediaminetetraacetic acid disodium titration solution (equivalent to calcium gluconate. According to the consumption of this solution and the amount of calcium gluconate, the concentration of this solution is calculated. Storage:

Place in a glass stopper bottle to avoid contact with rubber stoppers, rubber tubes, etc.

Operation steps: Weigh the test sample accurately, add 100ml of water to dissolve, add 15ml of sodium hydroxide test solution and calcium-purple red indicator, and titrate the solution with disodium ethylenediaminetetraacetic acid (titrate until the solution changes from purple to pure blue. Record the volume (ml) of the disodium EDTA titration solution consumed per 1 ml of the disodium EDTA titration solution (equivalent to C12H22CaO14·H2O).

Note 1: "precision weighing" means that the weight should be accurate to one-thousandth of the weighed weight, and "precision measurement" means that the accuracy of the volume should meet the accuracy requirements of the volume pipette in the national standard.

The content of calcium gluconate was determined by coordination titration, and calcium-violet was used as an indicator.

Because calcium gluconate contains calcium ions, coordination titration should be used to determine the content!