L-Tryptophan

L-Tryptophan

CAS No.: 73-22-3
Molecular Formula: C11H12N2O2
Molecular Weight: 204.23
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product description
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.


Chemical Properties
PropertyValue

Melting point

289-290 °C (dec.)(lit.)

Alpha

-31.1 º (c=1, H20)

Boiling point

342.72°C (rough estimate)

Density

1.34

Bulk density

400kg/m3

Refractive index

-32 ° (C=1, H2O)

Storage temp.

2-8°C

Solubility

20% NH3: 0.1 g/mL at 20 °C, clear, colorless

Form

Powder

Pka

2.46(at 25℃)

Color

White to yellow-white

PH

5.5-7.0 (10g/l, H2O, 20℃)

Odor

wh. cryst. or cryst. odorless powd., sl. bitter taste

Biological source

Non-animal source

Optical Rotation

[α]20/D 31.5±1°, c = 1% in H2O

Water Solubility

11.4 g/L (25 ºC)

Merck

14,9797

BRN

86197

Stability

Stable. Incompatible with strong acids, strong oxidizing agents.

InChIKey

QIVBCDIJIAJPQS-VIFPVBQESA-N

LogP

0.704 (est)

CAS DataBase Reference

73-22-3(CAS DataBase Reference)

NIST Chemistry Reference

L-Tryptophan(73-22-3)

EPA Substance Registry System

L-Tryptophan (73-22-3)

Absorption

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


Safety Information

PropertyValue

Hazard Codes

Xi

Risk Statements

33-40-62-41-37/38-36/37/38-22

Safety Statements

24/25-36/37/39-36-26

WGK Germany

2

RTECS

YN6130000

F

8

TSCA

Yes

HS Code

29339990

Hazardous Substances Data

73-22-3(Hazardous Substances Data)

Toxicity

LD508mmol / kg (rat, intraperitoneal injection). It is safe when used in food (FDA, §172.320, 2000).


Product Usage

L-Tryptophan is an essential amino acid and a vital precursor to serotonin and melatonin, making it indispensable in the nutraceutical and pharmaceutical industries. Its primary application is in dietary supplements designed to improve sleep quality, regulate mood, and alleviate anxiety. In infant nutrition, it is a mandatory additive in formulas to ensure healthy neurological development and sleep-wake cycles. The animal feed industry also utilizes L-Tryptophan extensively as a growth promoter and stress-reducer for livestock and aquaculture, enhancing feed efficiency. Furthermore, it serves as a high-value chemical intermediate in the synthesis of specialized drugs and biochemical reagents. In cosmetics, it is occasionally used in anti-aging formulations for its potential antioxidant properties and role in skin repair.

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Delivery Time

Inventory 2-3 working days New manufacturing 7-10 working days

Mode of Transportation
1. By Air, fast but expensive.
2. By Sea, usual and economy.
3. By Train, suit for middle Asia countries.
4. By Express, suit for small package.
We only provide highest quality goods available, accompanied by after support!

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Q1: Are Your Products Compliant With International Standards?

A1: Yes, our company holds a number of internationally recognized core certifications. All production and operation activities strictly follow international environmental, safety and quality standards, and each batch of products is accompanied by a compliance test report to meet the chemical industry requirements in different regions around the world.


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A2: Yes, we have a professional R&D team and refined production capacity. We can customize chemical products of different specifications and performances according to customers' specific needs, and provide full-process technical support to meet the personalized application needs of downstream industries.


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A3: The delivery cycle varies according to product type, order quantity and destination. We have a complete global supply chain system to ensure fast and safe delivery of goods. For specific cycle, you can consult our sales team for detailed information.


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A4: You can contact our customer service or sales team to specify the specific model and specification of the required samples. We will provide free samples according to the actual situation, and the sample express fee can be negotiated.

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