
Citric Acid Monohydrate CAS 5949-29-1



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- Appearance: White powder
- Purity: 99. 0%min
- Stock: In stock
- Sample: Available
- Zhishang Chemical: Citric Acid Monohydrate Supplier & Manufacturer
Citric Acid Monohydrate: The Complete Guide
- Item 1: Basic Info of Citric Acid Monohydrate
- Item 2: What is Citric Acid Monohydrate?
- Item 3: Citric Acid Monohydrate Uses
- Item 4: The Manager has Something to Say
- Item 5: Application of Citric Acid Monohydrate
- Item 6: Preparation of Citric Acid Monohydrate
- Item 7: Quality Control of Citric Acid Monohydrate
- Item 8: Hot Sale Products
- Item 9: Get Citric Acid Monohydrate Quotation
Citric Acid Monohydrate for Sale
Basic Info of Citric Acid Monohydrate
Chemical Name: | Citric Acid Monohydrate |
Other Name: | Citric acid monohydrate; 3-Carboxy-3-hydroxy-pentanedioic acid monohydrate |
CAS: | 5949-29-1 |
EINECS: | 200-662-2 |
Type: | Food additives; Pharmaceutical raw materials; Plant extracts |
Molecular Formula: | C6H10O8 |
Molecular Weight: | 210.1388 |
Melting point | -94 °C(lit.) |
Boiling point | 56 °C760 mm Hg(lit.) |
density | 0.791 g/mL at 25 °C(lit.) |
vapor density | 2 (vs air) |
vapor pressure | 184 mm Hg ( 20 °C) |
refractive index | n20/D 1.359(lit.) |
Fp | 1 °F |
storage temp. | no restrictions. |
solubility | Citric Acid Monohydrate is very soluble in water, freely soluble in ethanol and sparingly soluble in ether. |
pka | 3.138, 4.76, 6.401 |
form | Solid |
color | White |
Specific Gravity | 0.810 (20/4℃) |
PH | 1.85 (50g/l, H2O, 25℃) |
Water Solubility | 1630 g/L (20 oC) ;H2O: soluble 54% (w/w) at 10°C (Citric acid in water) |
Sensitive | Hygroscopic |
Stability: | Stable. Incompatible with oxidizing agents, bases, reducing agents, nitrates. |
Brand Name: | Zhishang Chemical |
Provide: | Citric Acid Monohydrate MSDS; Citric Acid Monohydrate COA |
What is Citric Acid Monohydrate?
Citric acid monohydrate, likewise called citric acid, scientific name 3-hydrocarbyl-3-carboxyglutaric acid, citric acid monohydrate exists in nature in lemons, oranges, plums, plums, pears, peaches, figs, etc. Amongst the fruits, the acid content is greater in the premature ones. Citric acid monohydrate is an anemic translucent crystal or white crystalline powder, odorless, with a strong and also enjoyable sour preference, which gradually weathers in warm air as well as deliquescence in humid air. According to various crystallization conditions, the crystal types include anhydrous citric acid as well as citric acid having crystal water. Business citric acid is mainly anhydrous citric acid as well as citric acid monohydrate. Citric acid monohydrate is crystallized from an aqueous option at a reduced temperature (below 36.6 ° C). The item after separation and drying out has a molecular weight of 210.14, a melting point of 70 to 75 ° C as well as a density of 1.542. Put in dry air, the crystal water in citric acid monohydrate will certainly escape and also weather. Anhydrous citric acid is crystallized in a liquid solution over 36.6 ° C, with a molecular weight of 192.12 and a density of 1.665. The important temperature for the conversion of citric acid monohydrate to citric acid anhydrous is 36.6 ° C.
Citric acid monohydrate is commonly used in the food sector, and also can likewise be utilized as a feed additive, safe cleaning agent, mordant, and so on. At the same time, citric acid monohydrate can likewise be utilized in pharmaceuticals, chemicals, light sector, atomic energy, environmental management as well as other commercial areas, and is additionally an important resources for cosmetics, steel cleaning agents, materials, cardboard, cigarette, electroplating, and so on. The discovery of citric acid monohydrate has a background of greater than 200 years. As early as 1784, somebody first separated citric acid crystals from lemon juice. In 1917, citric acid monohydrate was generated by fermentation of Aspergillus niger, as well as commercial production of citric acid monohydrate began. The commercial manufacturing of citric acid monohydrate in China began in 1963. During that time, there were not many suppliers, as well as the range and output were really little, which can not meet the residential demand. The domestic market remained in short supply and the need depended upon imports. Citric acid monohydrate is a requirement in the food industry as well as entails lots of commercial areas connected to individuals’s lives.
With the development of China’s citric acid monohydrate sector, the items remain to increase, as well as the quality of citric acid monohydrate likewise remains to enhance. Because citric acid monohydrate is mostly utilized in the food market as well as medication, it is related to individuals’s health and life safety, so there are rigorous policies on the high quality demands of citric acid monohydrate. China has likewise created relevant requirements for citric acid monohydrate, which are progressively according to global standards.
Citric Acid Monohydrate Uses
- Citric acid monohydrate is mostly made use of in food and also drink sector as acidulant, flavoring representative, chemical and also preservative. Additionally made use of as antioxidant, plasticizer, cleaning agent in chemical market, cosmetic market as well as washing sector.
- Determination of bismuth, nitrite, oxygen and water, determination of light weight aluminum, copper, mercury, nickel, oxygen as well as thorium, utilized as a sequestering representative, removal of trace metals, preparation of buffer remedies, as well as resolution of product potassium.
- Citric acid monohydrate as preservative as well as antioxidant. It is additionally used as sour, flavoring and fresh-keeping agent in fruit drinks, candies, biscuits, biscuits, canned fruits, jams and also jellies. It is various from other kinds of citric acid, and its moisture percent arrays from 7.5 to 9.0.
- Citric acid monohydrate is a tricarboxylic acid discovered in citrus fruits. Citric acid is utilized as an excipient in pharmaceutical preparations due to its antioxidant buildings. It keeps the stability of the active component as well as serves as a preservative. It is also used as an acidifier to regulate pH and works as an anticoagulant by chelating calcium in blood.
- Citrate monohydrate was made use of to prepare citrate barrier in platelets for in vivo microscopy. It acts as a pH control agent in food, beverage as well as pharmaceutical applications. It functions as an iron chelator. In animals, it enhances the usage price of dietary calcium. It is a valuable buffer part for antigen and epitope disclosure.
- Citric acid monohydrate has actually been utilized in:
- As a carbon resource for the synthesis of carbon nanodots
- To prepare of citric acid monohydrate solution/ buffer at ph-6.0 for tissue sample prep work
- Citric acid solubilization innovation to treat various samples
The Manager has Something to Say

This is William, CEO of Zhishang Chemical Co., Ltd.
Welcome to visit our factory . As the top chemical manufacturer, we have been striving for product quality, innovation , R&D, and customer service for the past 7 years. In the next 10 years or even longer, we are committed to becoming the most reliable chemical supplier in the world , creating a well-known international brand trusted by customers, with the spirit of “one meter wide, ten thousand meters deep”, we continue to focus on product research and development, continue to focus on customer service, continue to improve the supply chain service system, to create a professional chemical supply service team, to achieve win-win long-term cooperation. Please feel free to contact us if you have any questions.
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Application of Citric Acid Monohydrate
Citric acid monohydrate is in the areas of food industry, medicine, cosmetics as well as dental chemicals due to its non-toxicity, good solubility, delicious sour taste as well as exceptional derivatization.
Citric acid monohydrate is secure as well as safe, and is called the first edible sour representative. It is widely made use of in drink as well as fruit processing, soy products as well as flavoring agents. Citric acid is widely used in jelly, sweet, a glass of wine, and citric acid is contributed to frozen food, which can strengthen the result of anti-oxidants, inactivate enzymes, and ensure the stability of frozen food. Adding citric acid to veggies and seafood can prevent the growth of microbes and lengthen the preservation time. Sodium citrate and potassium citrate are included in jelly, cakes as well as numerous drinks as acidulants, artificial additive, and so on to boost the taste. According to stats, concerning 70% of the complete production of citric acid is used in the food and beverage industry.
Citric acid monohydrate is also commonly used in different nutritional dental fluids to change the pH worth of oral liquids, keep the security of active ingredients, as well as ensure dietary results. In hair shampoos, anti-dandruff shampoos and hair dyes, adding citric acid to readjust the pH worth can increase hair radiance as well as restore hair flexibility when shampooing. Citric acid is contributed to cosmetics and toothpaste to prevent the item from breaking down and ruining.
Citric acid monohydrate also has a vast array of applications in the chemical sector. Citric acid itself is a chemical synthesis intermediate and also the basic material for chemical synthesis. Because of its exceptional buildings, it is commonly made use of as cleaner, stabilizer, chelating representative and defoamer in the chemical sector. Recently, with the improvement of individuals’s understanding of environmental management, sodium citrate is more and more widely utilized to create green and also environmentally friendly phosphorus-free cleaning agents.
Preparation of Citric Acid Monohydrate
The method is to squeeze the juice from the fruits containing citric acid such as immature lemons and citrus, and then mix the juice with lime milk to generate calcium citrate, and then treat it with sulfuric acid to obtain a purer citric acid solution, then The product is obtained by concentration and crystallization.
Since 1784, when the Swedish chemical Scheele first extracted citric acid from lemon juice and crystallized solid citric acid, the natural juice extraction citric acid method became the main method of early citric acid production, which lasted about 50 years. The yield of citric acid produced by this method is low, and the method of extracting citric acid from natural fruit juice was gradually eliminated until the large-scale application of the microbial fermentation method in the middle of the 20th century.
Since 1880, citric acid was first synthesized in the laboratory, and now there are many different technical routes and methods. Among them, the synthesis of citric acid using acetone as a raw material is a relatively common synthesis method. After acetone is hydrated, reacted with hydrocyanic acid, and then hydrolyzed, citric acid can be obtained. In addition, there are also methods such as synthesis using methyl quinate aqueous solution and reaction synthesis between formaldehyde and isobutylene. However, the above-mentioned synthetic methods are relatively complicated, and most of the chemicals used are toxic, so far they have not been able to achieve industrialized production.
- Culture of bacteria
The microbial fermentation method is used in the industrial production of citric acid, and only several kinds of Aspergillus and yeast are valuable. Among them, Aspergillus niger is the most competitive strain in the industry, and the most competitive yeasts are lipolytic pseudosaccharides. Silk yeast and saccharomyces cerevisiae, etc. Aspergillus niger is cultured on agar and forms limited colonies on the agar. After 10 to 14 days at room temperature, it becomes a rich and dense sporozoite, and the colonies are black and sometimes dark brown. Considering that the citric acid-producing bacteria should have the characteristics of strong acid-producing ability and high citric acid concentration, the acid filter paper method, the discoloration circle method and the single spore transplantation method can be used to isolate Aspergillus niger to avoid the interference of other miscellaneous bacteria. Become Aspergillus niger for the production of citric acid. Cultivation of yeast The yeasts that can be used for the production of citric acid include Candida lipolytica and Candida quaternaria. The former has a strong ability to decompose fat, and the better carbon source is n-alkane. The latter can be fermented from alkanes to produce citric acid, and can also be fermented from sugars to produce citric acid. The pH of yeast fermentation is 3.5~4.0. - Fermentation
The fermentation process is divided into surface fermentation and solid fermentation, and the culture medium of different raw materials is prepared according to different processes, and then the material is steamed. The purpose of steaming is to gelatinize starch and sterilize it. When steaming the material, the material should be heated evenly, the steam should be smooth, and the material should be added while steaming. The steamed materials should be spread out and cooled down. When the temperature drops below 37°C, water can be replenished and inoculated, and the fermentation is done. The end point of fermentation is determined by the acidity. Bacteria break down. - Extraction
Fermentation acid – filtration (removal of bacteria and residues) – neutralization, filtration – calcium citrate – acid hydrolysis, filtration – crude acid solution – purification – concentration – crystallization – centrifugation – drying – packaging – finished product. After the fermentation, the fermented aldehyde is processed. For surface fermentation, immediately separate the cap and the fermentation broth, then wash the cap and the shallow dish with a small amount of water, and combine the fermentation broth with the washing water; the citric acid in the solid fermentation solution should be leached with water at a temperature of 80°C for 2 to 3 times. , immersed in water to combine. The fermented acid is filtered with a filter press, and the filtrate and washing water are combined and put into the filtrate tank. Citric acid reacts with calcium salts and calcium bases to form calcium citrate which is precipitated from the liquid phase and separated from soluble impurities. If the acid solution contains a lot of oxalic acid, it can be precipitated in the hot neutralization solution below the pH value of 3, so that the oxalate can be separated first. The neutralization end point is tested with precision test paper, and the pH value is maintained at 6.0~6.8. Stir at about 85°C for 30 minutes to fully separate out calcium sulfate and filter. Calcium citrate is hydrolyzed with sulfuric acid, and the amount of sulfuric acid is determined according to the content of citric acid in the solution. Generally, the excess of sulfuric acid does not exceed 0.2%. After acid hydrolysis, the acid solution is filtered to purify the citric acid solution by adsorption decolorization and ion exchange to remove pigments, colloids and metal cations such as iron ions, calcium ions, copper ions, magnesium ions and anionic impurities such as sulfate ions in the solution. The purification is mostly carried out on the column, the decolorizing carbon is GH-15 granular carbon, and the ion resin is anion and cation resin. The concentration of citric acid purification solution is only 20%~25%, and crystallization can only be carried out when it is concentrated to more than 70%. When concentrating, the temperature should not be too high to avoid the decomposition of citric acid. The concentration of the purified liquid can be carried out under negative pressure. In order to save energy, a double-effect or triple-effect evaporator can be used. The concentration is carried out in 2 stages. After the first concentration, it is put into a settling tank for thermal insulation and sedimentation, and then most of the gypsum is removed; the second concentrated solution contains about 80% of citric acid, and the material is discharged and crystallized in time. For the second concentration, lift-type or bracket-type evaporators can be used to reduce the contact time between feed liquid and heat medium and improve product quality. Different crystallization methods can be used to obtain different products. For the crystallization of citric acid monohydrate, 80% solution, when the temperature is 55 °C, is stirred and cooled in a crystallizer. When the temperature drops to 0 °C, seed crystals are added to start crystallization. Control the temperature not to exceed 36°C, at this time the product is citric acid monohydrate; if the solution is concentrated to 83% at 60°C, cool to 46°C, add seed crystals, maintain the temperature at 40~60°C and slowly crystallize, and finally drop to 38℃, the product is anhydrous citric acid. The crystal paste is centrifuged to obtain crystalline commercial citric acid.
References
- Citric acid monohydrate – PubChem
- He Liangcan.Experimental study on cooling crystallization process of citric acid concentrate[D].Tianjin University,2010.
Citric Acid Monohydrate Supplier and Manufacturer
As a citric acid monohydrate supplier and manufacturer with a strict standard product quality system certificate, Zhishang Chemical has long been providing the best citric acid monohydrate raw materials to customers all over the world.
Over the years, relying on professional team experience and customer-centric team concept to meet customer needs in a timely manner, our company enjoys a high reputation in the world. At present, our company has served more than 6,000 customers and has established long-term cooperative relations with customers from many countries.
If you have a demand for citric acid monohydrate and related products, please contact our service staff Zhishang Chemical – White directly, and we will provide you with high-quality products at the best price.
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We will make samples before mass production, and after the sample is approved, we’ll begin mass production. Doing 100% inspection during production, then doing random inspection before packing.
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Our MOQ is 1kg. But usually we accept less quantities, such as 100g on the condition that the sample charge is 100% paid.
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Quality Control of Citric Acid Monohydrate

