L-Tryptophan best price high purity hot sale good supplement
28 Inquiries
73-22-3
Food Grade
98%
shanghai
SKX
25kgs/drum
2025-06-15
food additives,health ingredients,pharm intermediates
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Product Details
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Seller Information
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Inquiry History
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DescriptionECHEMI Editorial ReferenceL-Tryptophan (Tryptophan) is an essential amino acid that is the precursor of serotonin, melatonin, and vitamin B3[1].
L-tryptophan is a white powder with a flat taste. An essential amino acid; occurs in isomeric forms. (NTP, 1992)|Solid
L-tryptophan is a white powder with a flat taste. An essential amino acid; occurs in isomeric forms. (NTP, 1992)|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.|An essential amino acid that is necessary for normal growth in infants and for nitrogen balance in adults. It is a precursor of indole alkaloids in plants. It is a precursor of serotonin (hence its use as an antidepressant and sleep aid). It can be a precursor to niacin, albeit inefficiently, in mammals.|Tryptophan is the least plentiful of all 22 amino acids and an essential amino acid in humans (provided by food), Tryptophan is found in most proteins and a precursor of serotonin. Tryptophan is converted to 5-hydroxy-tryptophan (5-HTP), converted in turn to serotonin, a neurotransmitter essential in regulating appetite, sleep, mood, and pain. Tryptophan is a natural sedative and present in dairy products, meats, brown rice, fish, and soybeans. (NCI04)|An essential amino acid that is necessary for normal growth in infants and for NITROGEN balance in adults. It is a precursor of INDOLE ALKALOIDS in plants. It is a precursor of SEROTONIN (hence its use as an antidepressant and sleep aid). It can be a precursor to NIACIN, albeit inefficiently, in mammals.Basic Info-
Product Name:
L-Tryptophan
Other Name:L-Tryptophan;Tryptophan,L-;l-β-3-Indolylalanine;Tryptophane;Tryptophan;L-Tryptophane;1H-Indole-3-propanoic acid,α-amino-,(S)-;L-(-)-Tryptophan;l-α-Aminoindole-3-propionic acid;2-Amino-3-indolylpropanoic acid;(S)-α-Aminoindole-3-propionic acid;(-)-Tryptophan;1H-Indole-3-alanine,(S)-;EH 121;(S)-Tryptophan;(S)-α-Amino-1H-indole-3-propanoic acid;(S)-α-Amino-β-indolepropionic acid;3-Indol-3-ylalanine;L-Alanine,3-(1H-indol-3-yl)-;Lyphan;NSC 13119;(2S)-2-Amino-3-(1H-indol-3-yl)propanoic acid;(S)-2-Amino-3-(1H-indol-3-yl)propanoic acid;(2S)-2-Amino-3-(1H-indol-3-yl)propanoic acid;(2S)-2-Azaniumyl-3-(1H-indol-3-yl)propanoate;6912-86-3;80206-30-0;154635-35-5;2416148-24-6
CAS No.:73-22-3
Molecular Formula:C11H12N2O2
InChIKeys:InChIKey=QIVBCDIJIAJPQS-VIFPVBQESA-N
Molecular Weight:204.22500
Exact Mass:204.23
EC Number:200-795-6
UNII:8DUH1N11BX
NSC Number:757373
DSSTox ID:DTXSID5021419
NCI Thesaurus Code:C29603
Color/Form:Leaflets or plates from dilute alcohol|White to slightly yellowish-white ... crystals or crystalline powder
ATC Code:N - Nervous system
HScode:2933990090
Categories:
Characteristics-
PSA:
79.11000
XLogP3:-1.1
Appearance:L-tryptophan is a white powder with a flat taste. An essential amino acid; occurs in isomeric forms. (NTP, 1992)
Density:1.4±0.1 g/cm3
Melting Point:282 °C
Boiling Point:447.9°C at 760 mmHg
Flash Point:224.7±25.9 °C
Refractive Index:1.698
Water Solubility:H2O: 13.4 mg/mL at 25 °C
Storage Conditions:Protect from light
Vapor Pressure:2.1X10-9 mm Hg at 25 deg C (est)
Toxicity:LD508mmol / kg (rat, intraperitoneal injection). It is safe when used in food (FDA, §172.320, 2000).
Specific rotation:Specific optical rotation: -31.5 deg at 23 °C/D (water, 1%), +2.4 deg at 20 °C/D (hydrochloric acid, 0.5 N); +0.15 deg at 20 °C/D (sodium hydroxide, 2.43% in 0.5 N)
Odor:Odorless
Taste:FLAT TASTE
PH:A 1% solution in water has a pH of 5.5 to 7.
PKA:7.38(at 25 °C)
Dissociation Constants:7.38 (at 25 °C)|pK1 = 2.38 /SRC: carboxylic acid/; pK2 = 9.39 /SRC: primary amine/
Collision Cross Section:154.22 Ų [M+H]+ [CCS Type: DT, Method: stepped-field]|158.58 Ų [M-H]- [CCS Type: DT, Method: stepped-field]|145 Ų [M+H]+ [CCS Type: TW, Method: calibrated with polyalanine]|150.1 Ų [M+H]+ [CCS Type: DT, Method: single field calibrated with ESI Low Concentration Tuning Mix (Agilent)]|150.3 Ų [M+H]+ [CCS Type: DT, Method: single field calibrated with ESI Low Concentration Tuning Mix (Agilent)]|147.6 Ų [M+Na]+ [CCS Type: DT, Method: single field calibrated with ESI Low Concentration Tuning Mix (Agilent)]|147.7 Ų [M+Na]+ [CCS Type: DT, Method: single field calibrated with ESI Low Concentration Tuning Mix (Agilent)]|142.3 Ų [M-H]- [CCS Type: DT, Method: single field calibrated with ESI Low Concentration Tuning Mix (Agilent)]|142.5 Ų [M-H]- [CCS Type: DT, Method: single field calibrated with ESI Low Concentration Tuning Mix (Agilent)]|151.5 Ų [M-H]- [CCS Type: DT, Method: single field calibrated with ESI Low Concentration Tuning Mix (Agilent)]|149.1 Ų [M-H]-
Experimental Properties:Decomposes at 289 °C (rapid heating)|Needles from methanol, decomposes at 251 °C /Tryptophan hydrochloride/|UV: 3453 (Sadtler Research Laboratories Spectral Collection) /Tryptophan (DL)/
Air and Water Reactions:Slightly soluble in water.
Reactive Group:Salts, Acidic
Reactivity Profile:Acidic salts, such as L-TRYPTOPHAN, are generally soluble in water. The resulting solutions contain moderate concentrations of hydrogen ions and have pH's of less than 7.0. They react as acids to neutralize bases. These neutralizations generate heat, but less or far less than is generated by neutralization of inorganic acids, inorganic oxoacids, and carboxylic acid. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible. Many of these compounds catalyze organic reactions.
Hazard IdentificationClassification of the substance or mixture
Not classified.
GHS label elements, including precautionary statements
Pictogram(s) No symbol. Signal word No signal word
Hazard statement(s) none
Precautionary statement(s) Prevention none
Response none
Storage none
Disposal none
Other hazards which do not result in classification
no data available
Handling and StoragePrecautions for safe handling
Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.
Conditions for safe storage, including any incompatibilities
Protect from light
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Seller Information
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Business Type:
Trader
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Main Products:
food additives,health ingredients,pharm intermediates
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Location:
Room J7945, 2nd Floor, Building 39, 52 Chengliu Road, Jiading District, Shanghai
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Payment Terms:
100% TT in advance
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Average lead Time:
15 days
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Total Annual Revenue:
$2.5 million-$5 million
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Total Employees:
11-50
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Year of Establishment:
2000
Company Certificates-
![Shanghai Kangxin Chemical Co.,Kosher]( "Kosher")
Kosher
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![Shanghai Kangxin Chemical Co.,Kosher]( "Kosher")
Kosher
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![Shanghai Kangxin Chemical Co.,Kosher]( "Kosher")
Kosher
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Inquiry History28 Inquiries
Country Product Purchase Quantity Date Posted 
India
L-Tryptophan (Vegan Only)
50.00 KG Mar 24, 2026
India
L-Tryptophan powder
25.00 KG Feb 13, 2025 
Peru
L-Tryptophan
3000 KG Sep 20, 2026
India
L Tryptophan
25.00 KG Oct 30, 2025 
United States
L-Tryptophan
1 MT Apr 16, 2025 
Egypt
L-Tryptophan
1000 KG Jun 27, 2024
India
L- Tryptophan 98.5%
5.00 MT Oct 16, 2025
Egypt
L-Tryptophan powder
100.00 KG Oct 11, 2025 
Greece
TRYPTOPHAN (Trp, W)
300.00 KG Sep 25, 2025
India
L Tyrptophan
1.00 KG Apr 25, 2025 
United Kingdom
L-Tryptophan powder
15.00 MT Nov 22, 2024
United States
L-Tryptophan Powder
10 MT Oct 18, 2024 
Russia
L-Tryptophan
25 KG Sep 24, 2024 
Slovenia
L-TRYPTOPHAN
400 G Jan 9, 2026
India
L-Tryptophan
1 MT Apr 23, 2025
United Kingdom
L-Tryptophan powder
1.00 20' Fcl Apr 2, 2025
India
Sodium Hydroxide
100.00 KG Feb 13, 2025
India
L-Tyrosine
25.00 KG Feb 13, 2025
India
Acetic acid/GAA
1.00 20' Fcl Feb 26, 2024
United Kingdom
L-Lysine MonoHCL
50.00 KG Jun 12, 2025 Post an enquiry for this product
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