| Customization: | Available |
|---|---|
| CAS No.: | 5949-29-1 |
| Formula: | C6h10o8 |
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Citric acid monohydrate is an organic acid. Its molar enthalpy of solution in water has been reported to be ΔsolHm (298.15K, m = 0.0203molkg-1) = (29061±123)Jmol-1. It can be produced by crystallization from mother liquor of citric acid solution at 20-25°C during citric acid synthesis. An investigation of its crystal growth kinetics indicates dat growth is linearly dependent on size.
| Item | Standard |
| Appearance | White particle or White crystalline powder |
| Assay (%) | 99.5-100.5 |
| Light Transmittance (%) | ≥ 95.0 |
| Moisture (%) | 7.5-9.0 |
| Readily Carbonisablle Substance | ≤ 1.0 |
| Sulphated Ash (%) | ≤ 0.05 |
| Chloride (%) | ≤ 0.005 |
| Sulphate (%) | ≤ 0.015 |
| Oxalate (%) | ≤ 0.01 |
| Calcium (%) | ≤ 0.02 |
| Iron (mg/kg) | ≤ 5 |
| Arsenic (mg/kg) | ≤ 1 |
| Lead | ≤0.5 |
| Water Insoluble Substances | Filtration time not more than 1 min; Filter membrane basically doesn't change color; Visual mottled particles not more than 3. |
| Packing | 25kg/bag |
Food industry
Citric acid is the most biochemically produced organic acid in the world. Citric acid and salts are one of the pillar products of the fermentation industry, mainly used in the food industry, such as sour agents, solubilizers, buffers, antioxidants, Deodorizing agent, flavor enhancer, gelling agent, toner, etc.
Metal cleaning
Citric acid is an organic acid produced by microbial fermentation. It is widely used in detergent production, and its specificity and chelation play a positive role. In the actual use process, citric acid has good performance, mainly in terms of safety. The raw materials for the preparation of citric acid are all derived from food, which is a safe food-grade microorganism. The use of citric acid will not affect the environment. It is relatively easy to degrade under the action of microorganisms and heat, and its own chelating ability is also relatively strong. The main reason is that citrate has a relatively strong chelation of manganese ions and iron ions. Ability, use effect is also more prominent. The corrosion inhibition performance of citric acid in detergent is also prominent. Pickling is an important link in chemical cleaning. Compared with inorganic acids, citric acid is relatively weak in acidity, so it is relatively The corrosiveness produced is also relatively small, the safety and reliability of citric acid cleaning are relatively strong, and the waste liquid is also relatively easy to handle, and will not cause harm to the human body.
Fine chemical industry
Citric acid is a kind of fruit acid. Its main function is to accelerate the renewal of cutin. It is often used in lotion, cream, shampoo, whitening products, anti-aging products, acne products, etc.
Industrial Wastewater Treatment
Typically, starches are the main source of citric acid. First, crush the starchy raw material, then add an appropriate amount of water to the crushed raw material and stir, ferment the mixture, obtain the filtrate after fermentation, add calcium carbonate to the filtrate for neutralization reaction, and filter out calcium citrate , use sulfuric acid to acidify calcium citrate and filter, ion exchange and decolorize the filtrate, then concentrate, crystallize, and dry to obtain white powdery citric acid.
Citric acid production waste mainly comes from the waste neutralization liquid, concentrated sugar water, sugar washing water, tank washing water and filter cloth washing water produced in the fermentation and extraction process. The tank washing water has the highest concentration, but its water volume is smaller than that of concentrated sugar water , the concentrated sugar water has the largest amount of water, and the concentration is higher, and the concentration and water amount of the remaining wastewater are lower.
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