二氧化钙
calcium peroxide hydrate
CAS: 1305-79-9
Molecular Formula: CaO2
二氧化钙 - Names and Identifiers
| Name | calcium peroxide hydrate |
| Synonyms | calper Calciumperoxid CALCIUM DIOXIDE CALCIUM PEROXIDE Calcium Peroxide Calcium superoxide CALCIUMPEROXIDE,FCC calcium dioxidanediide calciumperoxide[ca(o2)] CALCIUM PEROXIDE HYDRATE calcium peroxide hydrate |
| CAS | 1305-79-9 |
| EINECS | 215-139-4 |
| InChI | InChI=1/Ca.O2/c;1-2/q+2;-2/rCaO2/c1-2-3-1 |
二氧化钙 - Physico-chemical Properties
| Molecular Formula | CaO2 |
| Molar Mass | 72.08 |
| Density | 2.92 |
| Melting Point | >365°C(lit.) |
| Water Solubility | Slightly soluble in water. Soluble in acids |
| Appearance | Powder |
| Merck | 14,1689 |
| Sensitive | Moisture Sensitive |
| Physical and Chemical Properties | Character white crystalline powder. Odorless and almost tasteless. melting point 275 ℃ relative density 2.92 The solubility is very slightly soluble in water, insoluble in ethanol, ether, acetone. |
| Use | Used as an oxygenator, bactericide, antiseptic, anti-starter, seed disinfectant, oil bleach, etc |
二氧化钙 - Risk and Safety
| Risk Codes | R9 - Explosive when mixed with combustible material R36/37/38 - Irritating to eyes, respiratory system and skin. R34 - Causes burns |
| Safety Description | S17 - Keep away from combustible material. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S451 - S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. |
| UN IDs | UN 1457 5.1/PG 2 |
| WGK Germany | 1 |
| TSCA | Yes |
| HS Code | 28259019 |
| Hazard Class | 5.1 |
| Packing Group | II |
二氧化钙 - Upstream Downstream Industry
| Raw Materials | Hydrogen peroxide Calcium hydroxide |
二氧化钙 - Nature
Open Data Verified Data
The Pure product is a white crystalline powder. Odorless and almost tasteless. Insoluble in ethanol, ether; Almost insoluble in water. Dissolved in acid to generate hydrogen peroxide. Slow decomposition in moist air and water. The possibility of combustion in contact with organic matter.
Last Update：2024-01-02 23:10:35
二氧化钙 - Preparation Method
Open Data Verified Data
The production methods of calcium peroxide mainly include calcium chloride method and calcium hydroxide method. The former production equipment is relatively simple, but the process is complex, energy consumption, high production costs and product purity is difficult to guarantee, now generally not used. The latter is the reaction product formed by adding hydrogen peroxide to the milk of lime with the addition of a suitable stabilizer. The process is simple and the purity of the product is high.
Last Update：2022-01-01 09:03:57
二氧化钙 - Use
Open Data Verified Data
It can be used as a flour treating agent and an oxidizing agent in food processing. For food, fruit and vegetable preservation, dough improvement, food Disinfection. Calcium peroxide is a multifunctional inorganic peroxide with good stability and non-toxicity. China's provisions can be used in flour, the maximum amount of 0. 5g/kg. For fruit preservation, the amount of banana l ~ 3g/kg, room temperature can be maintained hard, green state for more than 10 days; Persimmon can keep hard for more than 40 days.
Last Update：2022-01-01 09:03:58
二氧化钙 - Safety
Open Data Verified Data
mouse oral LD50:5g/kg. ADI. Mixed with organic matter, reducing agent, flammable substances such as sulfur, phosphorus, etc., there is a risk of combustion explosion, and the moisture can be gradually decomposed. In bags, 25Kg per bag. Store in a cool, dry warehouse. Packaging must be sealed and moisture-proof. Transportation should be protected against rain and days.
Last Update：2022-01-01 09:03:58
二氧化钙 - Introduction
Properties
Calcium peroxide is an inorganic compound with the chemical formula CaO2. It is a white or light yellow crystalline powder, odorless, almost odorless, insoluble in water, and insoluble in organic solvents such as ethanol and ether. It begins to decompose when heated to 315 ℃, and the temperature for complete decomposition is 400-425 ℃. The dried product is very stable at normal temperature. Calcium peroxide can dissolve in dilute acids to generate hydrogen peroxide. Calcium peroxide will gradually and slowly decompose in humid air or water, releasing oxygen for a long time.
Use
Firstly, calcium peroxide can be used for disinfection, including disinfection of water, industrial equipment, and food processing equipment. Secondly, it can be used to bleach paper, textiles, leather, etc. In addition, calcium peroxide can also be used for water treatment to remove pollutants such as iron oxide, copper, and manganese from water. In chemical reactions, calcium peroxide can be used for organic synthesis, foaming agent production, and so on. At the same time, it can also be used for firefighting as a fire extinguishing or fire prevention agent.
In addition, due to the oxygen releasing properties of calcium peroxide when it comes into contact with water, as well as its non-toxic and non polluting nature, it is still an excellent oxygen supply agent. This oxygen supply agent can be used in various aspects such as fish farming, crop cultivation, and sewage treatment.
Method of production
There are three main methods for preparing calcium peroxide:
1. Preparation of calcium peroxide by lead oxide method. React calcium hydroxide with excess hydrogen peroxide solution to produce calcium peroxide and water. This reaction requires a catalyst, usually using lead oxide as the catalyst.
2. Preparation of calcium peroxide by calcium hydroxide decomposition method. Heat calcium hydroxide to high temperature to decompose it into calcium oxide and water, introduce hydrogen peroxide solution at high temperature, and react to obtain calcium peroxide.
3. Preparation of calcium peroxide by calcium oxychloride reduction method. Calcium oxide can be chlorinated with chlorine to form calcium oxychloride, and then reduced with ethanol in the presence of calcium oxychloride to obtain calcium peroxide. This method is more economical and efficient compared to the above two methods when the preparation amount is large.
Security information
Calcium peroxide is a relatively stable inorganic peroxide, characterized by white or slightly yellow powder, odorless and tasteless. It is extremely soluble in water and acid, and produces hydrogen peroxide. It can slowly release oxygen in humid air or water for a long time. In addition, it has strong bleaching, sterilization, and disinfection effects, and is not harmful to the environment.
However, calcium peroxide belongs to the category of explosive hazardous chemicals and is controlled in accordance with the Public Security Management Measures for Explosive Hazardous Chemicals. During production, storage, and use, calcium peroxide needs to comply with corresponding safety regulations and operating procedures to ensure safety.
Overall, calcium peroxide is a versatile and excellent oxygen donor, playing an important role in fish farming, crop cultivation, sewage treatment, and other fields. However, during contact and use, it is necessary to pay attention to safety issues and comply with relevant regulations.
Last Update：2024-04-09 02:00:06
