Zinc acetate dihydrate with the CAS number 5970 - 45 - 6 is a high - quality chemical compound. Its molecular formula is C₄H₆O₄Zn·2H₂O, and the molecular weight is approximately 219.51 g/mol. This compound appears as a colorless or white crystalline powder. It is highly soluble in water, and slightly soluble in ethanol. The product has a melting point in the range of 237 - 242°C when it loses its water of crystallization. It should be stored in a cool, dry place away from moisture and strong oxidizing agents to maintain its quality and stability.
1. **Medical Field**: Zinc acetate dihydrate is used in lozenges for the treatment of the common cold. Zinc ions can inhibit the replication of rhinoviruses, which are the main cause of the common cold. It can also be used in oral care products, such as mouthwashes and toothpaste, due to its antibacterial properties. Zinc ions can help reduce the formation of dental plaque and prevent bad breath.
2. **Chemical Industry**: It is employed as a catalyst in some organic synthesis reactions. For example, it can catalyze the esterification reaction to promote the formation of esters. In addition, it is used in the production of some pigments and dyes, as it can react with other substances to form compounds with specific colors.
3. **Agriculture**: Zinc is an essential micronutrient for plants. Zinc acetate dihydrate can be used as a zinc fertilizer to supplement zinc deficiency in soil, which is beneficial for plant growth, especially for the development of roots and leaves.
1. **In Medical Products**:
- When used in lozenges, the appropriate dosage and formulating process should be strictly followed. Usually, the content of zinc acetate dihydrate in lozenges is controlled within a certain range to ensure safety and effectiveness. For example, in some commercial cold lozenges, the content of zinc acetate may be around 10 - 25 mg per lozenge.
- In oral care products, it needs to be evenly mixed with other ingredients. The concentration of zinc acetate dihydrate in mouthwashes may be around 0.1% - 0.5%.
2. **In Chemical Reactions**:
- As a catalyst, the amount of zinc acetate dihydrate added depends on the specific reaction. Generally, it is added in a small proportion, usually less than 5% of the total reactant mass. It should be added under appropriate reaction conditions, such as at a certain temperature and in a specific solvent system.
3. **In Agriculture**:
- When used as a zinc fertilizer, it can be dissolved in water and sprayed on the leaves or applied to the soil. The application rate depends on the soil conditions and the type of plants. For most crops, the application rate of zinc acetate dihydrate may be around 1 - 5 kg per hectare.
1. **Medical Use Case**: A clinical trial was conducted on a group of 200 volunteers with early - stage common cold symptoms. Half of them were given lozenges containing zinc acetate dihydrate, and the other half were given placebo lozenges. The results showed that the group taking zinc acetate lozenges had a significantly shorter duration of cold symptoms, with an average reduction of about 2 - 3 days compared to the placebo group. In addition, the severity of symptoms such as sore throat and nasal congestion was also reduced.
2. **Chemical Industry Use Case**: In a laboratory - scale esterification reaction, acetic acid and ethanol were used as reactants. When zinc acetate dihydrate was added as a catalyst at a concentration of 2% of the total reactant mass, the reaction rate increased significantly. The yield of ethyl acetate increased from about 60% without a catalyst to over 90% within the same reaction time.
3. **Agriculture Use Case**: In a wheat field with zinc - deficient soil, half of the field was treated with zinc acetate dihydrate at a rate of 3 kg per hectare, while the other half was left untreated. At the harvest time, the treated area showed better plant growth. The wheat yield in the treated area increased by about 15% compared to the untreated area, and the quality of the wheat grains was also improved, with higher protein content.
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