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Merck

93659

Sigma-Aldrich

L-Tryptophan

≥99.5% (NT), BioUltra

Synonym(e):

(S)-2-Amino-3-(3-indolyl)propionsäure, L-α-Amino-3-indolpropionsäure

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About This Item

Empirische Formel (Hill-System):
C11H12N2O2
CAS-Nummer:
Molekulargewicht:
204.23
Beilstein:
86197
EG-Nummer:
MDL-Nummer:
UNSPSC-Code:
12352209
eCl@ss:
32160406
PubChem Substanz-ID:
NACRES:
NA.26
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Produktbezeichnung

L-Tryptophan, BioUltra, ≥99.5% (NT)

Produktlinie

BioUltra

Qualitätsniveau

Assay

≥99.5% (NT)

Form

powder or crystals

Optische Aktivität

[α]20/D −31.5±1°, c = 1% in H2O

Verunreinigungen

insoluble matter, passes filter test

Glührückstand

≤0.1%

Verlust

≤0.1% loss on drying, 20 °C (HV)

Farbe

white

mp (Schmelzpunkt)

280-285 °C (dec.) (lit.)

Löslichkeit

0.5 M HCl: 0.1 g/mL at 20 °C, clear, colorless to faintly yellow

Anionenspuren

chloride (Cl-): ≤50 mg/kg
sulfate (SO42-): ≤50 mg/kg

Kationenspuren

Al: ≤5 mg/kg
As: ≤0.1 mg/kg
Ba: ≤5 mg/kg
Bi: ≤5 mg/kg
Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
K: ≤50 mg/kg
Li: ≤5 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Mo: ≤5 mg/kg
Na: ≤50 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Sr: ≤5 mg/kg
Zn: ≤5 mg/kg

Absorption

cut-off at 326 nm in 0.5 M HCl at 0.5 M

Anwendung(en)

cell analysis

SMILES String

N[C@@H](Cc1c[nH]c2ccccc12)C(O)=O

InChI

1S/C11H12N2O2/c12-9(11(14)15)5-7-6-13-10-4-2-1-3-8(7)10/h1-4,6,9,13H,5,12H2,(H,14,15)/t9-/m0/s1

InChIKey

QIVBCDIJIAJPQS-VIFPVBQESA-N

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Anwendung

L-Tryptophan has been used as a nutritional supplement to study its effect on the circadian clock of primary cell lines.[1] It has also been used as a test amino acid aerosol to study the variation in the fluorescence intensity of thermally-exposed bacterial bioaerosols.[2]

Biochem./physiol. Wirkung

Tryptophan (Trp) is one of the functional amino acids that are associated with growth, reproduction, maintenance and immunity.[3] Increased Trp availability is necessary for the regulation of mood, cognition and behaviour. It is hypothesised that L-Trp might be useful in inducing sleep in healthy adults against the normal circadian rhythm. Trp uptake by the brain depends on the plasma ratio of Trp to all of the other LNAAs (large neutral amino acids). Higher the Trp:LNAAs ratio, greater is the Trp uptake.[4]

Sonstige Hinweise

Aminosäure-Zwischenproduct von Serotonin und Melatonin
In tryptophan-substituted Sephadex and Sepharose for the improved chromatographic separation of cellulases[5]; As spacer in isotachophoresis of serum proteins[6]; Growth requirement of various microorganisms[7]

Rechtliche Hinweise

Sephadex is a registered trademark of Cytiva
Sepharose is a trademark of Cytiva

Lagerklassenschlüssel

13 - Non Combustible Solids

WGK

WGK 1

Flammpunkt (°F)

Not applicable

Flammpunkt (°C)

Not applicable

Persönliche Schutzausrüstung

Eyeshields, Gloves, type N95 (US)


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Analysenzertifikate (COA)

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Kunden haben sich ebenfalls angesehen

Long-lasting effect of perinatal exposure to L-tryptophan on circadian clock of primary cell lines established from male offspring born from mothers fed on dietary protein restriction.
Nascimento E
PLoS ONE, 8(2), 1-14 (2013)
CRC Handbook of Microbiology, 4, 1-1 (1974)
T. Hine et al.
Electrophoresis ?83, 541-541 (1984)
M A Vijayalakshmi et al.
Journal of chromatography, 177(2), 201-208 (1979-09-21)
The adsorption of tyrosine, tryptophan and some related compounds on tryptophan and tryptophanyltryptophan gels is similar to but much stronger than that observed with the parent gel Sephadex G-25. The adsorption has been attributed mainly to charge transfer or redistribution
Variation in the fluorescence intensity of thermally-exposed bacterial bioaerosols
Jae HeeJung and Jung EunLee
Journal of Aerosol Science, 65, 101-110 (2013)

Questions

1–2 of 2 Questions  
  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer
    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer
    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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