L-(-)-루신

그림문자(GHS)

• 그림문자(GHS)

  

• 신호 어

  Warning

• 유해·위험 문구

  H315：피부에 자극을 일으킴

  H319：눈에 심한 자극을 일으킴

  H335：호흡 자극성을 일으킬 수 있음

• 예방조치문구

  P271：옥외 또는 환기가 잘 되는 곳에서만 취급하시오.

  P280：보호장갑/보호의/보안경/안면보호구를 착용하시오.

L-(-)-루신 MSDS

• L-Leu

L-(-)-루신 화학적 특성, 용도, 생산

• 순도시험

    (1) 비선광도 : 이 품목 4g을 정밀히 달아 6N 염산을 가하여 녹인 다음 100mL로 하여 이 액의 선광도를 측정하고 다시 건조물로 환산할 때, ＝+14.5～+16.5°이어야 한다.

    (2) 납 : 이 품목 5.0g을 취하여 원자흡광광도법 또는 유도결합플라즈마발광광도법에 따라 시험할 때, 그 양은 5.0ppm 이하이어야 한다.

    (3) 비소 : 이 품목을 비소시험법에 따라 시험할 때, 그 양은 4.0ppm 이하이어야 한다.

• 정량법

    이 품목을 건조한 다음 약 0.4g을 정밀히 달아 개미산 3mL 및 빙초산 50mL를 가하여 녹인 다음 0.1N 과염소산용액으로 적정한다(지시약 : 크리스탈바이올렛․빙초산시액 2방울). 종말점은 액의 색이 청녹색으로 변하는 점이다. 따로 같은 방법으로 공시험을 한다.

  0.1N 과염소산용액 1mL ＝ 13.12mg C₆H₁₃NO₂

• 강열잔류물

    이 품목의 강열잔류물은 0.1% 이하이어야 한다.

• 개요

  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.

• 화학적 성질

  L-Leucine is odorless and has a slightly bitter taste. L-Leucine is a branched-chain, essential amino acid that stimulates muscle protein synthesis.

• 출처

  Reported found as a constituent in proteins; also present in the free state in the human body

• 용도

  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.

• 제조 방법

  By bromination followed by amination of isocaproic acid; via the acetamidomalonic ester; by isolation from gluten, casein, keratin; from hydantoin.

• 생산 방법

  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.

• 정의

  ChEBI: The L-enantiomer of leucine.

• 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.

• 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

• 저장

  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.]

• 비 호환성

  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.

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