10035-04-8
calcium chloride dehydrate flake
CAS: 10035-04-8
Molecular Formula: CaCl2H4O2
10035-04-8 - Names and Identifiers
| Name | calcium chloride dehydrate flake |
| Synonyms | replenisher(calcium) Calciumchloride,granular CalciumChlorideDihydrateAr calciumdichloridedihydrate calcium chloride dehydrate flake CalciumChloride,1MSterileSolution CalciumChlorideDihydrateCaCl2*2H2O |
| CAS | 10035-04-8 |
| EINECS | 600-075-5 |
| InChIKey | LLSDKQJKOVVTOJ-UHFFFAOYSA-L |
10035-04-8 - Physico-chemical Properties
| Molecular Formula | CaCl2H4O2 |
| Molar Mass | 147.01 |
| Density | 1.71g/mLat 25°C(lit.) |
| Melting Point | 30°C |
| Water Solubility | 1000 g/L (0 ºC) |
| Solubility | H2O: 1M at20°C, clear, colorless |
| Vapor Presure | 0.01 mm Hg ( 20 °C) |
| Appearance | Solid |
| 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 |
| 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. |
10035-04-8 - 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 |
10035-04-8 - 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 15:16:44
