L-トリプトファン

危険有害性情報のコード(GHS)

• 絵表示(GHS)

  

• 注意喚起語

  Danger

• 危険有害性情報

  H225：引火性の高い液体および蒸気

  H290：金属腐食のおそれ

  H314：重篤な皮膚の薬傷?眼の損傷

• 注意書き

  P210：熱/火花/裸火/高温のもののような着火源から遠ざ けること。－禁煙。

  P233：容器を密閉しておくこと。

  P234：他の容器に移し替えないこと。

  P240：容器を接地すること/アースをとること。

  P241：防爆型の電気機器/換気装置/照明機器/．．．機器を使 用すること。

  P242：火花を発生させない工具を使用すること。

  P243：静電気放電に対する予防措置を講ずること。

  P264：取扱い後は皮膚をよく洗うこと。

  P264：取扱い後は手や顔をよく洗うこと。

  P280：保護手袋/保護衣/保護眼鏡/保護面を着用するこ と。

  P301+P330+P331：飲み込んだ場合：口をすすぐこと。無理に吐かせ ないこと。

  P303+P361+P353：皮膚（または髪）に付着した場合：直ちに汚染された衣 類をすべて脱ぐこと/取り除くこと。皮膚を流水/シャワー で洗うこと。

  P363：汚染された衣類を再使用す場合には洗濯をすること。

  P370+P378：火災の場合：消火に．．．を使用すること。

  P390：物的被害を防止するためにも流出したものを吸収 すること。

  P403+P235：換気の良い場所で保管すること。涼しいところに 置くこと。

  P405：施錠して保管すること。

  P406：耐腐食性/耐腐食性内張りのある．．．容器に 保管すること。

  P501：内容物/容器を．．．に廃棄すること。

L-トリプトファン 価格

MSDS Information

• Indole-3-alanine

L-トリプトファン 化学特性,用途語,生産方法

• 外観

  白色〜わずかにうすい褐色, 結晶性粉末

• 定義

  本品は、次の化学式で表されるアミノ酸である。

• 溶解性

  水100gに0.82g (0℃), 1.14g (25℃)溶解。熱エタノールに可溶。水にやや溶けにくく、エタノール及びジエチルエーテルにほとんど溶けない。

• 解説

  L-トリプトファン,小葉状または板状結晶(希エタノール)．分解点289 ℃．[α]_D²³"－32.5°(水)，[α]_D²⁰"＋2.4°(1 mol L－1 塩酸)．pK1 2.35，pK2 9.33．熱水，熱エタノールに可溶．アダムキーウィッツ反応が陽性であり，タンパク質の紫外吸収はトリプトファンとチロシンによる．生体内ではニコチン酸，昆虫の色素形成，植物ホルモンのインドール酢酸など，生理的に重要な化合物の代謝中間体になっている．
  森北出版「化学辞典（第2版）
  

• 用途

  製剤研究用。アミノ酸研究用。

• 化粧品の成分用途

  ヘアコンディショニング剤、皮膚コンディショニング剤

• 効能

  抗うつ薬, トリプトファン補充薬

• 製造

  L-トリプトファン,略称TrpまたはW．タンパク質構成必須アミノ酸の一つ．工業的には，インドールやアクリルアルデヒドを出発原料として合成したD,L-トリプトファンの光学分割や，発酵法によってつくられる．

• 化学的特性

  Appearance: white crystalline powder. Odorless, slightly bitter taste;
  Solubility: slightly soluble in water (1.14%, 25 ℃), insoluble in ethanol; soluble in dilute acid or dilute alkali. mp 289 ° C (decomposition).
  Isoelectric point: 5.89. [α] D + 2.8 (5 mol / L HCl), [α] D + 6.2 (0.5 mol / L NaOH).
  It can be colored upon long-term exposure to light. Its co-heating reaction with water will generate a small amount of indole while heating in the presence of sodium hydroxide and copper sulfate will produce a large amount of indole. It is stable upon heating together with acid in the dark, but is easily to be decomposed when heated together with other amino acids, carbohydrates and aldehydes. L-tryptophan will be completely decomposed when applying acid to break down the protein.

• 使用

  L-tryptophan is an essential amino acid which is necessary for normal growth in infants and for nitrogen balance in adults. It acts as a natural dietary supplement and used as an antidepressant, anxiolytic and sleep aid. It is used as a precursor to niacin, indole alkaloids and serotonin. It acts as an important intrinsic fluorescent probe, which finds to estimate the nature of microenvironment of the tryptophan.

• 定義

  ChEBI: L-tryptophan is the L-enantiomer of tryptophan. It has a role as an antidepressant, a nutraceutical, a micronutrient, a plant metabolite, a human metabolite, a Saccharomyces cerevisiae metabolite, an Escherichia coli metabolite and a mouse metabolite. It is an erythrose 4-phosphate/phosphoenolpyruvate family amino acid, a proteinogenic amino acid, a tryptophan and a L-alpha-amino acid. It is a conjugate base of a L-tryptophanium. It is a conjugate acid of a L-tryptophanate. It is an enantiomer of a D-tryptophan. It is a tautomer of a L-tryptophan zwitterion.

• 調製方法

  The most attractive production processes for tryptophan are based on microorganisms used as enzyme sources or as overproducers: Enzymatic production from various precursors; Fermentative production from precursors; Direct fermentative production from carbohydrates by auxotrophic and analogue resistant regulatory mutants. L-tryptophan is synthesized from indole, pyruvate, and ammonia by the enzyme tryptophanase or from indole and L-serine/D,L-serine by tryptophan synthase these process variants were not economic due to the high costs of the starting materials. The microbial conversion of biosynthetic intermediates such as indole or anthranilic acid to L-tryptophan has also been considered as alternative for production.
  However, the manufacturer using genetically modified strains derived fromBacillus amyloliquefaciens IAM 1521 was forced to stop Ltryptophan production. L-Tryptophan produced by this process was stigmatized because of side products found in the product causing a new severe disease termed eosinophilia-myalgia syndrome (EMS). One of the problematic impurities, "Peak E", was identified as 1,10-ethylidene- bis-(L-tryptophan), a product formed by condensation of one molecule acetaldehyde with two molecules of tryptophan.
  

• 世界保健機関（WHO）

  L-tryptophan, an essential aminoacid and precursor of serotonin, was introduced into medicine in 1963 for the treatment of depression and sleep disorders. Its effectiveness in these conditions has, however, never been convincingly demonstrated. It is also widely used in dietary supplements, parenteral nutrition preparations and dietary products for children with phenylketonuria. In 1989, reports from the USA showed an association between the consumption of L-tryptophan containing preparations and the development of eosiniphilia-myalgia syndrome (EMS), a condition characterized by intense eosinophilia, severe muscle and joint pain, swelling of the arms and legs, skin rashes and possible fever. Some of the reported cases have been fatal. Since it is not yet clear whether L-tryptophan itself or an unidentified contaminant is the cause of the EMS, many drug regulatory authorities have suspended the marketing authorization of products containing tryptophan pending further investigation, whereas others have withdrawn these products or restricted their use.

• 一般的な説明

  White powder with a flat taste. An essential amino acid; occurs in isomeric forms.

• 空気と水の反応

  Slightly soluble in water.

• 反応プロフィール

  Amines are chemical bases. They neutralize acids to form salts plus water. These acid-base reactions are exothermic. The amount of heat that is evolved per mole of amine in a neutralization is largely independent of the strength of the amine as a base. Amines may be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen is generated by amines in combination with strong reducing agents, such as hydrides.

• 健康ハザード

  ACUTE/CHRONIC HAZARDS: When heated to decomposition L-Tryptophan emits toxic fumes.

• 火災危険

  Flash point data for L-Tryptophan are not available. L-Tryptophan is probably combustible.

• 安全性プロファイル

  Moderately toxic by intraperitoneal route. Experimental teratogenic and reproductive effects. Human mutation data reported. Questionable carcinogen with experimental tumorigenic data. When heated to decomposition it emits toxic fumes of NOx.

• 概要

  必須アミノ酸の一種．ニコチン酸，インドールアルカロイドの生体内前駆体として重要

• 純化方法

  Crystallise L-tryptophan from H2O/EtOH, wash it with anhydrous diethyl ether and dry it at room temperature in a vacuum over P2O5. It sublimes at 220-230o/0.03mm with 99% recovery and unracemised [Gross & Gradsky J Am Chem Soc 77 1678 1955]. [Cox & King Org Synth Coll Vol II 612 1943, Greenstein & Winitz The Chemistry of the Amino Acids J. Wiley, Vol 3 pp 2316-2345 1961, Beilstein 22 IV 6765.]

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L-トリプトファン スペクトルデータ(¹HNMR、¹³CNMR、IR1、IR2、MS、Raman)

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