L-Alanine powder is an organic compound with the molecular formula C3H7NO2. It is a colorless to white crystalline powder that is soluble in water and ethanol, but insoluble in ether and acetone. Mainly used for biochemical research, tissue culture, liver function testing, flavor enhancer, can enhance the seasoning effect of seasonings, and can also be used as a sour taste corrector to improve the sourness of organic acids. It can enhance the nutritional value of food in various types of food and beverages, such as bread, ice cream, fruit tea, dairy products, carbonated drinks, ice cream, etc. Adding 0.1-1% alanine can significantly improve the protein utilization rate in food and beverages, and due to its ability to be directly absorbed by cells, alanine can quickly restore fatigue and boost morale after consumption.
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Chemical Formula |
C3H7NO2 |
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Exact Mass |
89 |
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Molecular Weight |
89 |
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m/z |
89 (100.0%), 90 (3.2%) |
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Elemental Analysis |
C, 40.44; H, 7.92; N, 15.72; O, 35.91 |
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L-Alanine powder (chemical formula: C ∝ H ₇ NO ₂) is a non essential amino acid that is widely present in nature. It has the appearance of a white crystalline powder, is easily soluble in water, and slightly soluble in ethanol. As one of the basic units that make up proteins, it participates in key physiological processes such as protein synthesis, energy metabolism, and immune regulation in the human body.
1. Flavor enhancers and acid correction agents
It has a special freshness and sweetness, which can significantly enhance the overall flavor of food. Adding L-alanine to seasonings such as soy sauce and fish sauce can enhance freshness, alleviate saltiness, and mask unpleasant odors such as fishy smell; In pickled vegetables, it can buffer salty taste, enhance sweetness and freshness, while increasing the variety of volatile aroma components and weakening the odor of sulfur-containing compounds. In addition, it can also be used as a sour taste corrector to improve the sour and astringent taste of organic acids such as citric acid and malic acid, making the sour taste softer and more natural.
2. Low sodium healthy seasoning
Traditional flavor enhancers such as sodium glutamate (monosodium glutamate) contain sodium ions, and excessive intake may cause hypertension, atherosclerosis and other diseases. Free of sodium ions, in line with the modern "low sodium" health concept, it can be safely used to enhance the flavor of foods such as bread, ice cream, fruit tea, dairy products, etc. For example, adding 0.1% -1% L-alanine to carbonated beverages can significantly enhance sweetness persistence, while supplementing amino acids and enhancing nutritional value.
3. Flavor optimization of alcoholic beverages and beverages
Adding sweetness in alcohol production can make the wine more fragrant and mellow. Adding it to beer and sparkling wine can prevent amino acid browning and reduce the impact of browning on flavor; In fermented foods such as yogurt, it can regulate the sour taste produced by excessive fermentation and enhance the balance of taste. In addition, it can promote alcohol metabolism and reduce the damage of alcohol to the liver, which is widely used in the production of low alcohol alcohol.
4. Natural preservative
A mixture of dicarboxylic acids such as sodium acetate and fumaric acid, as well as oxidizing acids, can effectively inhibit the growth of harmful bacteria such as yeast, Escherichia coli, and Aspergillus niger, and extend the shelf life of foods such as noodles, pickled products, and seafood. Its compound with chili oil and potassium sorbate can also prevent the spoilage of feed, cosmetics, and drugs.
1. Amino acid infusion and treatment of liver disease
L-Alanine powder is the main ingredient of compound amino acid injections (such as "Amino Acid Injection-800") for treating liver disease, which can correct amino acid metabolism disorders caused by liver dysfunction and promote the recovery of liver coma patients. As a nutritional enhancer, it can also provide essential amino acids for critically ill patients, maintain nutritional balance, and save lives.
2. Protect the liver, relieve alcohol, and resist fatigue
L-alanine can accelerate alcohol metabolism and alleviate liver damage caused by alcohol by promoting the tricarboxylic acid cycle and increasing the production of intracellular reactive oxygen species. In addition, it can activate liver adenylate activated protein kinase, regulate systemic glucose metabolism, alleviate fatigue after exercise, and improve physical recovery efficiency.
3. Raw materials for drug synthesis
It is a key raw material for synthesizing drugs such as vitamin B6, propylene glycol dipeptides, and anliutong. It is also an important production material for antibacterial drug ofloxacin, hypertension treatment drug enalapril, new hepatitis C treatment drug sofosbuvir, and multiple sclerosis treatment drug glatirade acetate. Its derivatives can also be used to prepare tissue culture media, biochemical reagents, and liver function testing reagents.
4. New applications in disease treatment
Research has shown that promoting gluconeogenesis can reduce protein degradation in patients with glycogen storage disease type 2, providing a simple and economical therapy for the disease. In addition, high concentration culture medium can selectively eliminate human induced pluripotent stem cells and reduce the tumorigenic risk in stem cell therapy.
1. Amino acid surfactant
It can be used to synthesize mild amino acid surfactants that are environmentally friendly. Its cleaning, emulsifying, and penetrating abilities are comparable to traditional organic chemical surfactants, but it is environmentally friendly and non irritating to the human body. It is suitable for infants, young children, and sensitive skin care products. This type of surfactant also has excellent skin toning and moisturizing properties, which can enhance the user experience of cosmetics.
2. New environmentally friendly chelating agent
It is the core raw material for the production of methyl glycine diacetic acid (MGDA). MGDA is a biodegradable green chelating agent that can replace phosphates in detergents (which contribute to eutrophication of water bodies) and ethylenediaminetetraacetic acid (EDTA, which is difficult to degrade and prone to expanding heavy metal pollution).
MGDA has been widely used in high-performance and environmentally friendly detergents in the European and North American markets, with better chelating efficiency and stain removal performance than traditional products, and no environmental residue issues.
3. Biodegradable polymer
L-Alanine powder can be used to synthesize new biodegradable polymers such as polyester amides, which have customized properties and can be used to produce environmentally friendly packaging, medical materials, and agricultural films, reducing plastic pollution.
1. Nutritional reinforcement and growth promotion
It is the main nutritional supplement component of livestock and poultry feed, which can enhance the biological value of feed protein, promote animal growth, and prevent diseases. It can also promote visceral nitrogen cycling in young livestock, enhance immunity, and reduce breeding costs.
2. Feed preservation and antioxidant properties
It can prevent feed oxidation and spoilage, and extend the shelf life. Its complex with antioxidants can effectively inhibit fat oxidation in feed and maintain the stability of nutritional components.
Industrial field: Innovative applications from catalytic reactions to chiral synthesis
1. Chiral catalyst
Can be used as a chiral inducer for chiral synthesis, controlling the stereoconfiguration of products in organic synthesis and improving reaction selectivity. For example, it can be used as a catalyst to catalyze the aldol condensation reaction, with a product yield of 70% -84%, and the catalyst can be 2. Reused more than 5 times.
Metal anti-corrosion and electroplating
The chelating performance makes it suitable for metal surface treatment, preventing rust and improving glossiness. In the electroplating industry, it can be used as an additive to improve the quality of coatings and enhance corrosion resistance.
1. Biochemical research and tissue culture
It is a commonly used reagent in biochemistry and microbiology research, which can be used to prepare tissue culture media, measure liver function, and study amino acid metabolism pathways. As a standard substance, it can also be used to calibrate analytical instruments and ensure the accuracy of experimental data.
2. Gene editing and stem cell therapy
High concentration L-alanine culture medium can be used in gene editing to selectively eliminate human induced pluripotent stem cells and reduce the risk of tumorigenicity in stem cell therapy. In addition, it can also serve as an amino acid source for cell culture, supporting in vitro cell proliferation and differentiation research.
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The production of L-Alanine Powder involves multiple technical pathways, among which microbial fermentation has become the mainstream choice for industrial manufacturing due to its high efficiency and environmental sustainability. The core of this process lies in developing high-yield strains through gene editing technology to delete genes associated with byproduct formation. For instance, inhibiting alanine racemase activity reduces D-alanine contamination, thereby enhancing the purity and yield of L-alanine. For instance, utilizing a whole-cell conversion system, efficient conversion can be achieved under conditions of 1-200 g/L cell wet weight and 1-300 g/L L/D lactic acid. By controlling pH (4.0-9.0) and temperature (15-40°C), final product purity can reach 98.5%-101.5%.
Enzymatic conversion represents another significant process. This method uses L-aspartic acid as the raw material, directly decarboxylating it into L-alanine through the catalytic action of aspartate 4-decarboxylase. While this approach features a simple process and relatively low cost, the stability of raw material supply directly impacts production scale. Some enterprises have further enhanced conversion efficiency by optimizing enzyme reaction conditions-such as adjusting pH, temperature, and enzyme concentration-stabilizing product purity above 99%. This meets the demand for high-purity amino acids in food, pharmaceutical, and other industries.
Although chemical synthesis has a long history, it has gradually been phased out due to environmental pollution concerns. Early processes involved the Strecker reaction between acetaldehyde and ammonium chloride in the presence of sodium cyanide to produce racemic alanine, which was then separated to yield L-alanine. However, the use of cyanide compounds posed significant safety and environmental risks, making this method rarely used in modern production.
Regarding quality control, manufacturers strictly adhere to GMP (Good Manufacturing Practice) standards, implementing comprehensive monitoring from raw material procurement to finished product shipment. For instance, suppliers undergo rigorous screening and audits to ensure raw materials meet quality requirements. Systematic sampling and quantitative analysis during production enable real-time detection of impurity levels. Finished products undergo multiple rounds of testing, including purity determination, microbial limit checks, and heavy metal residue analysis, to guarantee product safety and efficacy. Some enterprises further engage third-party certification bodies to validate production process compliance and product quality reliability.
L-Alanine Powder manufacturing technology is evolving toward greener, more efficient approaches. Microbial fermentation has become the industry standard due to its high yield and low pollution advantages. Enzymatic conversion methods enhance raw material utilization and product purity through optimized process parameters. Meanwhile, chemical synthesis methods are gradually phased out due to environmental pressures. With continuous advances in biotechnology, future L-alanine production will increasingly prioritize sustainability to meet the growing market demand for high-quality amino acids.
FAQ
1. What is L-alanine powder?
L-alanine is one of the 20 standard protein amino acids and is a neutral non-essential amino acid. In powder form, it is white crystals or crystalline powder and is highly soluble in water.
2. What are the main purposes?
- Food Industry: Used as a sweetener (to enhance flavor, mostly in seasonings and beverages).
- Pharmaceutical Industry: As a raw material for amino acid infusions and nutritional preparations.
- Chemical/Research: Used in the preparation of biological culture media, biochemical reagents, and intermediate substances for drug synthesis.
3. Is it safe to use? What should be noted?
- Generally Recognized as Safe (GRAS): Safe when used within the specified dosage limits as a food additive.
- For medicinal use, it must comply with pharmacopoeia standards.
- Daily food supplements do not require special attention; as raw powder, it is recommended to prevent dust during handling and store in a cool and dry place.
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