Calcium chloride dihydrate
Calcium chloride dihydrate
CAS: 10035-04-8
Molecular Formula: CaCl2H4O2
Calcium chloride dihydrate - Names and Identifiers
| Name | Calcium chloride dihydrate |
| Synonyms | snow melt agent calcium dichloride replenisher(calcium) Calciumchloride,granular Calcium chloride dihydrate CalciumChlorideDihydrateAr calciumdichloridedihydrate CalciumChloride,1MSterileSolution CalciumChlorideDihydrateCaCl2*2H2O |
| CAS | 10035-04-8 |
| EINECS | 600-075-5 |
| InChI | InChI:1S/Ca.2ClH.2H2O/h;2*1H;2*1H2/q+2;;;;/p-2 |
| InChIKey | LLSDKQJKOVVTOJ-UHFFFAOYSA-L |
Calcium chloride dihydrate - Physico-chemical Properties
| Molecular Formula | CaCl2H4O2 |
| Molar Mass | 147.01 |
| Density | 1.71g/mLat 25°C(lit.) |
| Melting Point | 30°C |
| Boling Point | 100℃ at 760 mmHg |
| Water Solubility | 1000 g/L (0 ºC) |
| Solubility | H2O: 1M at20°C, clear, colorless |
| Vapor Presure | 0.01 mm Hg ( 20 °C) |
| Appearance | Crystallization |
| Specific Gravity | 0.835 |
| Color | White to white-grayish |
| Odor | Odorless |
| Maximum wavelength(λmax) | ['λ: 260 nm Amax: 0.015', , 'λ: 280 nm Amax: 0.012'] |
| Merck | 14,1659 |
| PH | 4.5-8.5 (50g/l, H2O, 20℃) |
| Storage Condition | Store at +15°C to +25°C. |
| Stability | Stable. Hygroscopic. Incompatible with vinylmethyl ether. |
| Sensitive | Hygroscopic |
| Refractive Index | ~1.358 |
| MDL | MFCD00149613 |
| Physical and Chemical Properties | Colorless crystals, general goods are white, gray-white or slightly yellow crystals, bitter and astringent, deliquescent. The relative density was 1.835. Soluble in water, the aqueous solution is neutral or slightly alkaline, corrosive. Soluble in alcohol, insoluble in ether. Dehydration became anhydrous upon heating to 260 °c. Other chemical properties are similar to anhydrous calcium chloride. |
| Use | Oxygen, sulfur absorbent. Food protective agent. Sizing agent. Water purification agent. Antifreeze. |
Calcium chloride dihydrate - Risk and Safety
| Risk Codes | R36 - Irritating to the eyes R36/37/38 - Irritating to eyes, respiratory system and skin. R22 - Harmful if swallowed R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S24 - Avoid contact with skin. S22 - Do not breathe dust. S36 - Wear suitable protective clothing. |
| WGK Germany | 1 |
| RTECS | EV9830000 |
| FLUKA BRAND F CODES | 3 |
| TSCA | Yes |
| HS Code | 28272000 |
Calcium chloride dihydrate - Reference
| Reference Show more | 1. Zhou Zhenhui, Xiang Shuangyun, Guan Wenyi, et al. Study on Microencapsulation Conditions of Lactic Acid Bacteria from Chicken [J]. Feed Research, 2019, 042(002):81-83. 2. Lin Kuan, Li Chunmei. Effects of Persimmon Tannin on Intestinal Microbes in Simulated Fermentation Environment in Vitro [J]. Food Industry Science and Technology, 2015, 36(022):160-163,167. 3. Li Wei, Chen Liang, Yin Dan, Yang Hao, Zhou Jiayi, Song Yu, Zhang Yan, Zou Liang. Preparation of Tetramethylpyrazine Ocular Liposome Thermosensitive Gel and Evaluation of Its Characteristics in Vitro and in Vivo [J]. Chinese Pharmacy, 2021,32(03):320-327. 4. Yang Yutong, Zhang Qingshuo, Fu Yunlin, Sun Jing. Pigment Composition, Stability and Antioxidant Activity of Dalbergia Bari Heartwood [J]. Forestry Science, 2021,57(03):126-134. |
Calcium chloride dihydrate - Nature
Open Data Verified Data
colorless crystals. Odorless, slightly bitter; Easily deliquescent. Soluble in water, soluble in alcohol, insoluble in ether. Its aqueous solution is neutral or weak alkaline, corrosive. Dehydration became anhydrous upon heating to 260 °c.
Last Update：2024-01-02 23:10:35
Calcium chloride dihydrate - Preparation Method
Open Data Verified Data
After purifying and clarifying the distillation waste liquid in ammonia-alkali soda ash production, it is evaporated in the multi-effect evaporator. When the calcium chloride content reaches about 40%, the sodium chloride in the solution is almost completely precipitated, after centrifugal separation, the mother liquor of sodium chloride was separated and added with arsenic removal agent and heavy metal removal agent for solution purification and filtration to remove impurities such as arsenic and heavy metals. It is sent to the evaporator to continue evaporation and concentration, so that the calcium chloride content reaches about 70%, and the calcium chloride product is obtained by condensation.
Last Update：2022-01-01 09:04:27
Calcium chloride dihydrate - Standard
Authoritative Data Verified Data
This product contains gasified calcium (CaCl2.2H20) should be 97.0% ~ 103.0%.
Last Update：2024-01-02 23:10:35
Calcium chloride dihydrate - Trait
Authoritative Data Verified Data
- This product is white, hard fragments or particles or crystalline powder; Odorless, easily deliquescent.
- This product is easily soluble in water and easily soluble in ethanol.
Last Update：2022-01-01 11:26:52
Calcium chloride dihydrate - Introduction
Oxygen, sulfur absorbent. Food protective agent. Sizing agent. Water purification agent. Antifreeze.
Last Update：2022-10-16 17:11:23
Calcium chloride dihydrate - Use
Open Data Verified Data
for regulating water, electrolytes and acid-base balance. Suitable for calcium deficiency and allergic diseases. Can be used for decreased blood calcium caused by tetany and intestinal colic, ureteral colic and so on. Can also be used for urticaria, exudative edema, itching skin disease, vitamin D deficiency rickets, rickets, pregnant and lactating women calcium salt supplement.
Last Update：2022-01-01 09:04:27
Calcium chloride dihydrate - Differential diagnosis
Authoritative Data Verified Data
The product of the aqueous solution of calcium salt and chloride identification reaction (General 0301).
Last Update：2022-01-01 11:26:53
Calcium chloride dihydrate - Safety
Open Data Verified Data
should be stored in a cool, ventilated, dry warehouse. Packaging containers must be sealed and moisture-proof. It is not allowed to be stored and mixed with toxic and hazardous materials and pollutants. During transportation, attention should be paid to rain and sun exposure. When loading and unloading should be light to prevent damage to the packaging bag. Fire can be suppressed by water, sand and various kinds of fire extinguishing.
Last Update：2022-01-01 09:04:28
Calcium chloride dihydrate - Exam
Authoritative Data Verified Data
pH
take l.Og of this product, add water 20ml to dissolve, shake, according to the law (General 0631),pH value should be 6.0~9.2.
clarity and color of solution
take this product l. After 10ml of water is added for dissolution, the solution shall be clear and colorless (General rule 0901 and general rule 0902). In case of turbidity, the solution shall not be more concentrated compared with No. 1 turbidity standard solution (General rule 0902).
sulfate
take l.Og of this product and check it according to law (General rule 0802). Compared with the control solution made of 0.02% of standard potassium sulfate solution, it should not be more concentrated ().
barium salt
take 2.0g of this product, add 20ml of water to dissolve, filter, the filtrate is divided into two equal parts, add 5ml of newly prepared calcium sulfate test solution in one part, and add 5ml of water in the other part, allow to stand for 1 hour, both solutions should be clear.
aluminium, iron and phosphate salts
take this product l. After 20ml of water is added for dissolution, 2 drops of dilute hydrochloric acid and 1 drop of phenolphthalein indicator solution are added, and ammonium chloride is added dropwise until the solution shows pink color and is heated to boiling, without turbidity or precipitation.
magnesium salts and alkali metals
salt take this product l. After adding 40ml of water to dissolve, add 0.5g of ammonium chloride, boil, add excess ammonium oxalate solution to completely precipitate calcium, heat on water bath for 1 hour, and let it cool, quantitatively transfer to a 100ml measuring flask, dilute to scale with water, shake well, filter, precisely measure 50ml of filtrate, add 0.5 m l sulfuric acid, evaporate to dryness, and burn to constant weight, the remaining residue should not exceed 5mg.
Heavy metals
take 2.0g of this product, add 2ml of acetate buffer solution (PH3.5) and an appropriate amount of water to dissolve it into 25ml, and check according to law (the first method of general rule 0821), and the heavy metal content shall not exceed 10 parts per million.
arsenic salt
take 1.0g of this product, add 5ml of hydrochloric acid and 23ml of water, and check according to law (General rule 0822 first law), shall comply with the provisions (0.0002%).
Last Update：2022-01-01 11:26:53
Calcium chloride dihydrate - Content determination
Authoritative Data Verified Data
take about 1.5g of this product, weigh it accurately, put it in a 100ml measuring flask with 10ml of water in advance, dilute it with water to the scale, shake it well; Take 10ml of precision measurement, put it in an Erlenmeyer flask, add 90ml of water, 15ml of sodium hydroxide test solution and about 0.lg of calmenin indicator, titrate with ethylenediamine tetraacetic acid disodium titration solution (0.05mol/L) until the solution changes from purple to pure blue.
equivalent to 7.351mg of CaCl2 • 2H20 per 1 ml of ethylene diamine tetraacetic acid disodium titration solution (0.05mol/L)Last Update：2022-01-01 11:26:54
Calcium chloride dihydrate - Category
Authoritative Data Verified Data
pharmaceutical excipients, osmotic regulator.
Last Update：2022-01-01 11:26:55
Calcium chloride dihydrate - Storage
Authoritative Data Verified Data
sealed and stored in a dry place.
Last Update：2022-01-01 11:26:55
Calcium chloride dihydrate - Reference Information
| pH indicator color change ph range | 5-8 |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| toxicity | LD504 g/kg (rat, oral). ADI is not restricted. generally recognized as safe (U. S. Food and Drug Administration). According to the provisions of GB 2760-86 in our country, it can be used as coagulant for canned and bean products, and the dosage is according to the normal production needs. According to FAO/WHO(1984), the usage and limit are: canned tomatoes, 800mg/kg in pieces, and the whole package is. 450 mg/kg, in terms of calcium; 350 mg/kg for canned grapes and pomelo, in terms of calcium; 350 mg/kg for canned green peas, strawberries, fruit salads, etc., in terms of calcium; 350 mg/kg for ripe peas, in terms of calcium; 200 mg/kg for jam and jelly, in terms of calcium; 250 mg/kg for pickled cucumber, 200 mg/kg for general cheese. Used as a coagulant for tofu, adding 4% ~ 6% concentration solution to soybean milk, the general dosage is 20~25g calcium chloride/1 soybean milk. Dipping fruits and vegetables with calcium chloride solution has good brittleness and hardness after sterilization, and has color protection effect. See anhydrous calcium chloride. |
| use | used as refrigerant (such as frozen brine for refrigerators, frozen brine for ice making and ice bar making), antifreeze, automobile antifreeze, fire extinguishing agent. Flame retardant for melting ice and melting snow, finishing and finishing of cotton fabrics. Used as adhesive and wood preservative. It is the raw material for making anhydrous calcium chloride. Used in wall painting and plastering operations to increase condensation capacity. Rubber production is used as a condensate. Mixed starch paste is used as glue. It is also used in non-ferrous metal smelting. Used as a pharmaceutical. used as calcium fortifier, chelating agent, curing agent and refrigerant for freezing in food industry. used as a refrigerant, also used in food processing, pharmaceuticals, etc. as a coagulant, China's regulations can be used in soy products according to production needs. As a supplement to feed calcium. Oxygen and sulfur absorbent. Food protective agent. Sizing agent. Water purification agent. Antifreeze. antifreeze. Fire extinguishing agent. |
| production method | limestone containing calcium carbonate of not less than 95% is crushed, and 31% hydrochloric acid is added into the dissolution tank according to the ratio of hydrochloric acid: limestone = 2.2:1. The gas generated by the reaction is sent to an absorption tower filled with limestone by an exhaust fan, and the top of the tower is sprayed with dilute calcium chloride solution. 300-350g/L calcium chloride solution is obtained at the bottom of the tower, which is incorporated into the calcium chloride solution discharged from the dissolution tank to obtain a crude calcium chloride solution containing about 450g/L. The crude calcium chloride solution contains less than 14g/L of free acid, and barium chloride is first added to the clarification tank to generate barium sulfate precipitate. Then steam is heated to 70-75 ℃, lime milk is added to adjust the PH to 8.5-9.0, so that impurities such as magnesium, aluminum and iron are precipitated in the form of hydroxide. After the neutralization liquid is clarified, filtered and purified, then evaporated and concentrated to 70% (boiling point 172-174 ℃), cooled, filtered and dried to obtain the product. pulverize limestone containing calcium carbonate ≥ 95%, and add 31% hydrochloric acid in the dissolution tank according to the ratio of hydrochloric acid: limestone = 2.2:1. The gas generated by the reaction is sent to an absorption tower filled with limestone by an exhaust fan, and the top of the tower is sprayed with dilute calcium chloride solution. 300~350g/L calcium chloride solution is obtained at the bottom of the tower, which is incorporated into the calcium chloride solution discharged from the dissolution tank to obtain a crude calcium chloride solution containing about 450g/L. The crude calcium chloride solution contains less than 14g/L of free acid, and barium chloride is first added to the clarification tank to generate barium sulfate precipitate. Then steam is heated to 70~75 ℃, lime milk is added to adjust the Ph value to 8.5~9.0, so that impurities such as magnesium, aluminum and iron are precipitated in the form of hydroxide. After the neutralization liquid is clarified, filtered and purified, then evaporated and concentrated to 70% (boiling point 172~174 ℃), cooled, filtered and dried to obtain the product. CaCO3 + 2HCl → CaCl2 + H2O + CO2 ↑ Soda ash waste liquid recovery method is mostly used in industrial production, and limestone hydrochloride powder method is used in a few. For the recovery method of soda ash waste liquid, please refer to industrial calcium chloride dihydrate. The difference is that arsenic removal agent and heavy metal removal agent are added to the mother liquor after sodium chloride is separated for solution purification and filtration to remove impurities such as arsenic and heavy metals. soda ash waste liquid recovery method distilled waste liquid (containing calcium chloride 100g/L, sodium chloride 43~50g/L, etc.) in ammonia-alkali soda ash production is purified and clarified, and evaporated in a multi-effect evaporator. When the calcium chloride content reaches about 40%, the sodium chloride in the solution is almost completely precipitated. After centrifugal separation, it can be returned as raw material for soda ash production or refined salt. The mother liquor after sodium chloride is separated, and after clarification, it is sent to the evaporator (rising film evaporator and falling film evaporator can be used) to continue evaporation and concentration, so that the calcium chloride content reaches about 70%, and it is injected into the packaging barrel and condensed to produce The finished product of calcium chloride dihydrate. Hydrochloric acid limestone powder method adds 31% hydrochloric acid and limestone powder (containing calcium carbonate> 95%) to the reactor according to the ratio of 2.2:1, and reacts under stirring to generate acidic calcium chloride solution, which is sent into a clear tank with stirring. Then add lime milk to make the pH value of the solution 8.5~9. At this time, iron hydroxide and magnesium hydroxide precipitate out, and remove impurities after clarification and filtration. The purified neutral calcium chloride solution is preheated, evaporated to 172~174 ℃ in an evaporator, and cooled and crystallized to obtain a finished product of calcium chloride dihydrate, whose CaCO3 + 2HCl → CaCl2 + H2O + CO2 ↑/td> |
Last Update：2024-04-09 21:04:16
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