China Largest Manufacturer factory sales L-Leucine CAS 61-90-5 CAS NO.61-90-5

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L-Leucine Basic information description Chemical Properties Uses toxicity Product Name: L-Leucine Synonyms: (s)-2-amino-4-methylvalericacid;1-Leucine;2-Amino-4-methylpentanoic acid;2-amino-4-methylpentanoicacid;2-amino-4-methyl-valericaci;4-methyl-l-norvalin;4-methyl-norvalin;alpha-Amino-gamma-methylvaleric acid CAS: 61-90-5 MF: C6H13NO2 MW: 131.17 EINECS: 200-522-0 Product Categories: Amino Acids;Nutritional Supplements;Amino Acid Derivatives;alpha-Amino Acids;Biochemistry;L-Amino Acids;Food and Feed Additive;Leucine [Leu, L];Amino Acids;Amino Acids and Derivatives;amino;1 Mol File: 61-90-5.mol   L-Leucine Chemical Properties Melting point  >300 °C (lit.) alpha  15.4 º (c=4, 6N HCl) Boiling point  122-134 °C(Press: 2-3 Torr) density  1,293 g/cm3 vapor pressure  <1 hPa (20 °C) refractive index  1.4630 (estimate) FEMA  3297 | L-LEUCINE Fp  145-148°C storage temp.  2-8°C solubility  1 M HCl: 50 mg/mL pka 2.328(at 25℃) form  powder color  White to Off-white PH 5.5-6.5 (20g/l, H2O, 20℃) optical activity [α]20/D +15.5°, c = 2 in 6 M HCl Water Solubility  22.4 g/L (20 C) λmax λ: 260 nm Amax: 0.05 λ: 280 nm Amax: 0.05 Sublimation  145-148 ºC JECFA Number 1423 Merck  14,5451 BRN  1721722 Stability: Stability Moisture and light sensitive. Incompatible with strong oxidising agents. CAS DataBase Reference 61-90-5(CAS DataBase Reference) NIST Chemistry Reference Leucine(61-90-5) EPA Substance Registry System L-Leucine (61-90-5)   Safety Information Safety Statements  24/25 WGK Germany  3 RTECS  OH2850000 TSCA  Yes HS Code  29224995 Hazardous Substances Data 61-90-5(Hazardous Substances Data) MSDS Information Provider Language L-Leu English SigmaAldrich English ACROS English ALFA English   L-Leucine Usage And Synthesis description L-leucine is one of the eight essential amino acids, and belonging to the aliphatic amino acids within twenty kinds of proteins. L-leucine and L-isoleucine and L-valine are called three branched chain amino acids. L-leucineLeucine and D-leucine are enantiomers . It is a white shiny hexahedral crystal or white crystalline powder at room temperature , Odorless, slightly bitter . In the presence of hydrocarbons ,it is stable in the aqueous mineral acid. Per gram is dissolved in 40ml water and about 100ml acetic acid. Very slightly soluble in ethanol or ether, dissolved in formic acid, dilute hydrochloric acid, a solution of alkali hydroxides and a solution of carbonates. L-leucine can promote insulin secretion, can lower blood sugar; promote sleep, reduce sensitivity to pain, migraine headaches, anxiety and ease tension, reduce symptoms of chemical reactions disorder in the body caused by alcohol , and helps control alcoholism; it has a role in the treatment of dizziness , also can promote skin wound and bone healing, so doctors usually advise patients to take leucine supplements after surgery. amino acid infusion and comprehensive amino acid preparations are often formulated to be used in the treatment or health care; also be used as food, cosmetics and feed additives and plant growth promoter. The best food sources of leucine include brown rice, beans, meat, nuts, soy flour, and whole wheat. Excessive intake can also cause side effects, high intake can cause pellagra, vitamin A deficiency, dermatitis, diarrhea, mental disorders and other issues,which needs to be paid attention to . Diet containing too much leucine will increase the number of ammonia in the body and destroy the liver and kidney function. Therefore, patients with impaired liver or kidney function should not be excessive intake, otherwise it will exacerbate the condition. Chemical Properties White shiny hexahedral crystals or white crystalline powder. Slightly bitter (DL-leucine is sweet). Sublimation at 145~148 ℃. Melting point 293~295 ℃ (decomposition). It belongs to the essential amino acids,and adult men requirement is 2.2g/d (151 version). It is necessary in normal growth for infants and maintaining normal nitrogen balance for adults. Natural products are found in the spleen, heart, etc., and are present in a variety of plant and animal tissues in the form of the proteins, free out after decomposition and corruption. Uses Amino acid drugs. Used as amino acid infusion and comprehensive amino acid preparations. For the diagnosis and treatment of children with idiopathic high blood sugar and glucose metabolism disorders,bile liver disease associated with reduced secretion , anemia, poisoning, muscular dystrophy, poliomyelitis, neuritis and mental illness. Diabetes, cerebral vascular sclerosis and kidney disease associated with proteinuria and hematuria is contraindicated. Gastric and duodenal ulcer patients should not be served. The product is used as a nutritional supplement,an amino acid infusion preparation and a comprehensive amino acid preparation,a hypoglycemic agent, a plant growth promoter.The product can be used as a spice according to GB 2760-8 . toxicity Safe for food (FDA, §172.3202000). LD505379mg/kg (rat, subcutaneously). Description Small, white, lustrous plates, or a white, crystalline powder, with a slightly bitter taste. One g dissolves in about 40 mL of water and in about 100 mL of acetic acid. It is sparingly soluble in alcohol, but is soluble in dilute hydrochloric acid and in solutions of alkali hydroxides and carbonates. ι-Leucine may be synthesized by bromination, followed by amination of isocaproic acid; via the acetamidomalonic ester; by isolation from gluten, casein, keratin; from hydantoin. Chemical Properties L-Leucine is odorless and has a slightly bitter taste. L-Leucine is a branched-chain, essential amino acid that stimulates muscle protein synthesis. Chemical Properties White crystalline powder Chemical Properties Leucine occurs as a white or almost off-white crystalline powder or shiny flakes. Occurrence Reported found as a constituent in proteins; also present in the free state in the human body Uses L-Leucine plays a vital role in hemoglobin formation, protein synthesis and metabolic functions. It assists the growth and repair of muscle and bone tissue. It is used in the treatment of amyotrophic lateral sclerosis - Lou Gehrig's disease. It prevents the breakdown of muscle proteins after trauma or severe stress and may be beneficial for individuals with phenylketonuria. It is also used as a food additive and flavor enhancer. Further, it is used to preserve muscle glycogen. Uses L-Leucine is an essential amino acid. It is also considered to be a branched chain amino acid, along with L-Isoleucine and L-Valine. It is used as a cell culture media component in the commercial biomanufacture of therapeutic recombinant proteins and monoclonal antibodies. Uses L-Leucine is an essential amino acid. L-Leucine acts as a nutrient signal to stimulate protein synthesis. It has also activates the mammalian target of rapamycin kinase that regulates cell growth. Uses Amino acid. Production Methods Leucine is produced microbially by incubating an amino-acidproducing microorganism including but not exclusive to Pseudomonas, Escherichia, Bacillus, or Staphylococcus in the presence of oxygen and a hydrocarbon. The nutrient medium should contain an inhibitory amount of a growth inhibitor that is a chemically similar derivative of leucine (e.g. methylallylglycine, a-hydrozinoisocaproic acid, or b-cyclopentanealanine) to inhibit the growth of the organism except for at least one mutant that is resistant to the inhibitory effect. The resistant mutant is then isolated and grown in the presence of oxygen and the hydrocarbon in the absence of the inhibitor. The mutant cells are then harvested and a nutrient medium is formed that includes a hydrocarbon as the sole source of carbon. Finally, the harvested cells are incubated in the medium in the presence of oxygen. Definition ChEBI: The L-enantiomer of leucine. Preparation By bromination followed by amination of isocaproic acid; via the acetamidomalonic ester; by isolation from gluten, casein, keratin; from hydantoin. Pharmaceutical Applications Leucine is used in pharmaceutical formulations as a flavoring agent. It has been used experimentally as an antiadherent to improve the deagglomeration of disodium cromoglycate micro-particles and other compounds in inhalation preparations; and as a tablet lubricant. Leucine copolymers have been shown to successfully produce stable drug nanocrystals in water. Biochem/physiol Actions Leucine is a non-glucogenic, essential amino acid. It is a branched-chain amino acid that is a structural component of proteins. Leucine positively influences insulin release to eliminate toxic sugars out of the blood. The degradation of leucine leads to the formation of ketone bodies. Safety Leucine is an essential amino acid and is consumed as part of a normal diet. It is generally regarded as a nontoxic and nonirritant material. It is moderately toxic by the subcutaneous route. LD50 (rat, IP): 5.379 g/kg storage Leucine is sensitive to light and moisture, and should be stored in an airtight container in a cool, dark, dry place. Purification Methods Likely impurities are isoleucine, valine, and methionine. Crystallise L-leucine from water by adding 4 volumes of EtOH. It sublimes at 180-188o/0.3mm with 99.1% recovery, and unracemised [Gross & Gradsky J Am Chem Soc 77 1678 1955]. [Greenstein & Winitz The Chemistry of the Amino Acids J. Wiley, Vol 3 p 2075-2094 1961, Kameda et al. J Pharm Soc Jpn 78 763 1958, Beilstein 4 IV 2738.] Incompatibilities Leucine is incompatible with strong oxidizing agents. Regulatory Status Included in the FDA Inactive Ingredients Database (IV infusion; oral tablets). Included in nonparenteral medicines licensed in the UK.   L-Leucine Preparation Products And Raw materials Raw materials Hydrochloric acid-->Sulfuric acid-->Ammonia-->Ammonium bicarbonate-->Activated carbon-->Α-PROTEIN-->o-Xylene-->Casein-->L-Isoleucine-->L-Methionine-->Naphthalene-2-sulfonic acid-->HEMOGLOBIN-->2-Bromotoluene-->Phenprobamate-->N-CARBOBENZOXY-DL-LEUCINE-->KERATIN-->granular active carbon Preparation Products L-Phenylalanine-->N-Acetyl-L-leucine-->L(+)-Leucinol-->N-BOC-L-leucylglycyl-arginine-p-nitroanilide hydrochloride

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Leader Biochemical Group is a large leader incorporated industry manufacturers and suppliers of advanced refined raw materials From the year of 1996 when our factory was put into production to year of 2020, our group has successively invested in more than 52 factories with shares and subordinates.We focus on manufacture Pharm & chemicals, functional active ingredients, nutritional Ingredients, health care products, cosmetics, pharmaceutical and refined feed, oil, natural plant ingredients industries to provide top quality of GMP standards products.All the invested factories' product lines cover API and intermediates, vitamins, amino acids, plant extracts, daily chemical products, cosmetics raw materials, nutrition and health care products, food additives, feed additives, essential oil products, fine chemical products and agricultural chemical raw materials And flavors and fragrances. Especially in the field of vitamins, amino acids, pharmaceutical raw materials and cosmetic raw materials, we have more than 20 years of production and sales experience. All products meet the requirements of high international export standards and have been recognized by customers all over the world. Our manufacture basement & R&D center located in National Aerospace Economic & Technical Development Zone Xi`an Shaanxi China. Now not only relying on self-cultivation and development as well as maintains good cooperative relations with many famous research institutes and universities in China. Now, we have closely cooperation with Shanghai Institute of Organic Chemistry of Chinese Academy of Science, Beijing Institute of Material Medical of Chinese Academy of Medical Science, China Pharmaceutical University, Zhejiang University. Closely cooperation with them not only integrating Science and technology resources, but also increasing the R&D speed and improving our R&D power. Offering Powerful Tech supporting Platform for group development. Keep serve the manufacture and the market as the R&D central task, focus on the technical research.  Now there are 3 technology R & D platforms including biological extract, microorganism fermentation and chemical synthesis, and can independently research and develop kinds of difficult APIs and pharmaceutical intermediates. With the strong support of China State Institute of Pharmaceutical Industry (hereinafter short for CSIPI), earlier known as Shanghai Institute of Pharmaceutical Industry (SIPI), we have unique advantages in the R & D and industrialization of high-grade, precision and advanced products.  Now our Group technical force is abundant, existing staff more that 1000 people, senior professional and technical staff accounted for more than 50% of the total number of employees, including 15 PhD research and development personnel, 5 master′ S degree in technical and management personnel 9 people. We have advanced equipment like fermentation equipment and technology also extraction, isolation, purification, synthesis with rich production experience and strict quality control system, According to the GMP required, quickly transforming the R&D results to industrial production in time, it is our advantages and our products are exported to North and South America, Europe, Middle East, Africa, and other five continents and scale the forefront in the nation, won good international reputation.  We believe only good quality can bring good cooperation, quality is our key spirit during our production, we are warmly welcome clients and partner from all over the world contact us for everlasting cooperation, Leader will be your strong, sincere and reliable partner in China.

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L-Leucine Basic information description Chemical Properties Uses toxicity Product Name: L-Leucine Synonyms: (s)-2-amino-4-methylvalericacid;1-Leucine;2-Amino-4-methylpentanoic acid;2-amino-4-methylpentanoicacid;2-amino-4-methyl-valericaci;4-methyl-l-norvalin;4-methyl-norvalin;alpha-Amino-gamma-methylvaleric acid CAS: 61-90-5 MF: C6H13NO2 MW: 131.17 EINECS: 200-522-0 Product Categories: Amino Acids;Nutritional Supplements;Amino Acid Derivatives;alpha-Amino Acids;Biochemistry;L-Amino Acids;Food and Feed Additive;Leucine [Leu, L];Amino Acids;Amino Acids and Derivatives;amino;1 Mol File: 61-90-5.mol   L-Leucine Chemical Properties Melting point  >300 °C (lit.) alpha  15.4 º (c=4, 6N HCl) Boiling point  122-134 °C(Press: 2-3 Torr) density  1,293 g/cm3 vapor pressure  <1 hPa (20 °C) refractive index  1.4630 (estimate) FEMA  3297 | L-LEUCINE Fp  145-148°C storage temp.  2-8°C solubility  1 M HCl: 50 mg/mL pka 2.328(at 25℃) form  powder color  White to Off-white PH 5.5-6.5 (20g/l, H2O, 20℃) optical activity [α]20/D +15.5°, c = 2 in 6 M HCl Water Solubility  22.4 g/L (20 C) λmax λ: 260 nm Amax: 0.05 λ: 280 nm Amax: 0.05 Sublimation  145-148 ºC JECFA Number 1423 Merck  14,5451 BRN  1721722 Stability: Stability Moisture and light sensitive. Incompatible with strong oxidising agents. CAS DataBase Reference 61-90-5(CAS DataBase Reference) NIST Chemistry Reference Leucine(61-90-5) EPA Substance Registry System L-Leucine (61-90-5)   Safety Information Safety Statements  24/25 WGK Germany  3 RTECS  OH2850000 TSCA  Yes HS Code  29224995 Hazardous Substances Data 61-90-5(Hazardous Substances Data) MSDS Information Provider Language L-Leu English SigmaAldrich English ACROS English ALFA English   L-Leucine Usage And Synthesis description L-leucine is one of the eight essential amino acids, and belonging to the aliphatic amino acids within twenty kinds of proteins. L-leucine and L-isoleucine and L-valine are called three branched chain amino acids. L-leucineLeucine and D-leucine are enantiomers . It is a white shiny hexahedral crystal or white crystalline powder at room temperature , Odorless, slightly bitter . In the presence of hydrocarbons ,it is stable in the aqueous mineral acid. Per gram is dissolved in 40ml water and about 100ml acetic acid. Very slightly soluble in ethanol or ether, dissolved in formic acid, dilute hydrochloric acid, a solution of alkali hydroxides and a solution of carbonates. L-leucine can promote insulin secretion, can lower blood sugar; promote sleep, reduce sensitivity to pain, migraine headaches, anxiety and ease tension, reduce symptoms of chemical reactions disorder in the body caused by alcohol , and helps control alcoholism; it has a role in the treatment of dizziness , also can promote skin wound and bone healing, so doctors usually advise patients to take leucine supplements after surgery. amino acid infusion and comprehensive amino acid preparations are often formulated to be used in the treatment or health care; also be used as food, cosmetics and feed additives and plant growth promoter. The best food sources of leucine include brown rice, beans, meat, nuts, soy flour, and whole wheat. Excessive intake can also cause side effects, high intake can cause pellagra, vitamin A deficiency, dermatitis, diarrhea, mental disorders and other issues,which needs to be paid attention to . Diet containing too much leucine will increase the number of ammonia in the body and destroy the liver and kidney function. Therefore, patients with impaired liver or kidney function should not be excessive intake, otherwise it will exacerbate the condition. Chemical Properties White shiny hexahedral crystals or white crystalline powder. Slightly bitter (DL-leucine is sweet). Sublimation at 145~148 ℃. Melting point 293~295 ℃ (decomposition). It belongs to the essential amino acids,and adult men requirement is 2.2g/d (151 version). It is necessary in normal growth for infants and maintaining normal nitrogen balance for adults. Natural products are found in the spleen, heart, etc., and are present in a variety of plant and animal tissues in the form of the proteins, free out after decomposition and corruption. Uses Amino acid drugs. Used as amino acid infusion and comprehensive amino acid preparations. For the diagnosis and treatment of children with idiopathic high blood sugar and glucose metabolism disorders,bile liver disease associated with reduced secretion , anemia, poisoning, muscular dystrophy, poliomyelitis, neuritis and mental illness. Diabetes, cerebral vascular sclerosis and kidney disease associated with proteinuria and hematuria is contraindicated. Gastric and duodenal ulcer patients should not be served. The product is used as a nutritional supplement,an amino acid infusion preparation and a comprehensive amino acid preparation,a hypoglycemic agent, a plant growth promoter.The product can be used as a spice according to GB 2760-8 . toxicity Safe for food (FDA, §172.3202000). LD505379mg/kg (rat, subcutaneously). Description Small, white, lustrous plates, or a white, crystalline powder, with a slightly bitter taste. One g dissolves in about 40 mL of water and in about 100 mL of acetic acid. It is sparingly soluble in alcohol, but is soluble in dilute hydrochloric acid and in solutions of alkali hydroxides and carbonates. ι-Leucine may be synthesized by bromination, followed by amination of isocaproic acid; via the acetamidomalonic ester; by isolation from gluten, casein, keratin; from hydantoin. Chemical Properties L-Leucine is odorless and has a slightly bitter taste. L-Leucine is a branched-chain, essential amino acid that stimulates muscle protein synthesis. Chemical Properties White crystalline powder Chemical Properties Leucine occurs as a white or almost off-white crystalline powder or shiny flakes. Occurrence Reported found as a constituent in proteins; also present in the free state in the human body Uses L-Leucine plays a vital role in hemoglobin formation, protein synthesis and metabolic functions. It assists the growth and repair of muscle and bone tissue. It is used in the treatment of amyotrophic lateral sclerosis - Lou Gehrig's disease. It prevents the breakdown of muscle proteins after trauma or severe stress and may be beneficial for individuals with phenylketonuria. It is also used as a food additive and flavor enhancer. Further, it is used to preserve muscle glycogen. Uses L-Leucine is an essential amino acid. It is also considered to be a branched chain amino acid, along with L-Isoleucine and L-Valine. It is used as a cell culture media component in the commercial biomanufacture of therapeutic recombinant proteins and monoclonal antibodies. Uses L-Leucine is an essential amino acid. L-Leucine acts as a nutrient signal to stimulate protein synthesis. It has also activates the mammalian target of rapamycin kinase that regulates cell growth. Uses Amino acid. Production Methods Leucine is produced microbially by incubating an amino-acidproducing microorganism including but not exclusive to Pseudomonas, Escherichia, Bacillus, or Staphylococcus in the presence of oxygen and a hydrocarbon. The nutrient medium should contain an inhibitory amount of a growth inhibitor that is a chemically similar derivative of leucine (e.g. methylallylglycine, a-hydrozinoisocaproic acid, or b-cyclopentanealanine) to inhibit the growth of the organism except for at least one mutant that is resistant to the inhibitory effect. The resistant mutant is then isolated and grown in the presence of oxygen and the hydrocarbon in the absence of the inhibitor. The mutant cells are then harvested and a nutrient medium is formed that includes a hydrocarbon as the sole source of carbon. Finally, the harvested cells are incubated in the medium in the presence of oxygen. Definition ChEBI: The L-enantiomer of leucine. Preparation By bromination followed by amination of isocaproic acid; via the acetamidomalonic ester; by isolation from gluten, casein, keratin; from hydantoin. Pharmaceutical Applications Leucine is used in pharmaceutical formulations as a flavoring agent. It has been used experimentally as an antiadherent to improve the deagglomeration of disodium cromoglycate micro-particles and other compounds in inhalation preparations; and as a tablet lubricant. Leucine copolymers have been shown to successfully produce stable drug nanocrystals in water. Biochem/physiol Actions Leucine is a non-glucogenic, essential amino acid. It is a branched-chain amino acid that is a structural component of proteins. Leucine positively influences insulin release to eliminate toxic sugars out of the blood. The degradation of leucine leads to the formation of ketone bodies. Safety Leucine is an essential amino acid and is consumed as part of a normal diet. It is generally regarded as a nontoxic and nonirritant material. It is moderately toxic by the subcutaneous route. LD50 (rat, IP): 5.379 g/kg storage Leucine is sensitive to light and moisture, and should be stored in an airtight container in a cool, dark, dry place. Purification Methods Likely impurities are isoleucine, valine, and methionine. Crystallise L-leucine from water by adding 4 volumes of EtOH. It sublimes at 180-188o/0.3mm with 99.1% recovery, and unracemised [Gross & Gradsky J Am Chem Soc 77 1678 1955]. [Greenstein & Winitz The Chemistry of the Amino Acids J. Wiley, Vol 3 p 2075-2094 1961, Kameda et al. J Pharm Soc Jpn 78 763 1958, Beilstein 4 IV 2738.] Incompatibilities Leucine is incompatible with strong oxidizing agents. Regulatory Status Included in the FDA Inactive Ingredients Database (IV infusion; oral tablets). Included in nonparenteral medicines licensed in the UK.   L-Leucine Preparation Products And Raw materials Raw materials Hydrochloric acid-->Sulfuric acid-->Ammonia-->Ammonium bicarbonate-->Activated carbon-->Α-PROTEIN-->o-Xylene-->Casein-->L-Isoleucine-->L-Methionine-->Naphthalene-2-sulfonic acid-->HEMOGLOBIN-->2-Bromotoluene-->Phenprobamate-->N-CARBOBENZOXY-DL-LEUCINE-->KERATIN-->granular active carbon Preparation Products L-Phenylalanine-->N-Acetyl-L-leucine-->L(+)-Leucinol-->N-BOC-L-leucylglycyl-arginine-p-nitroanilide hydrochloride