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L-Methionine for food and pharma

L-Methionine for food and pharma

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    l-methionine for hair growth


    cas no 63-68-3


    cas number 63-68-3

  • Product Name
  • CAS No.
  • Molecular Formula
  • Molecular Weight
  • EC Number
  • Place of Origin
  • Brand Name
    Premium Ingredient
  • Certification
  • Minimum Order Quantity
  • Packaging Details
  • Delivery Time
    1-2 WEEKS
  • Payment Terms
    TT against copy of documents、L/C
  • Supply Ability

L-Methionine for food and pharma



Products Description

Methionine is an amino acid. It is found in meat, fish, and dairy products. Amino acids are the building blocks that our bodies use to make proteins. Methionine plays an important role in the many functions within the body. Methionine can treat liver disorders and viral infections along with many other uses.


Test item specifications
Assay 98.5% to 101.5%
Identification Infrared absorption
Specific rotation +22.4° to +24.7°
PH 5.6 to 6.1
Loss on drying Not more than 0.3%
Residue on ignition Not more than 0.4%
Sulfate Not more than 0.03%
Iron Not more than 0.003%
Heavy metals Not more than 0.0015%
Chromatographic purity Not more than 0.5% of any individual impurity is found, and not more than 2.0% of total impurities is found
Organic volatile impurities Meets the requirements
Chloride Not more than 0.05%



Basic Info

Product Name:


Other Name:

L-Methionine;Methionine,L-;Cymethion;Methionine;Butanoic acid,2-amino-4-(methylthio)-,(S)-;2-Amino-4-(methylthio)butyric acid;S-Methionine;α-Amino-γ-methylmercaptobutyric acid;γ-Methylthio-α-aminobutyric acid;(S)-2-Amino-4-(methylthio)butanoic acid;l-Methionine;L-α-Amino-γ-methylthiobutyric acid;L-Homocysteine,S-methyl-;h-Met-oh;Acimethin;NSC 22946;S-Methyl-L-homocysteine;Secretory peptide (human clone HTXDU73);Methiorep;Meth-o-Tas;(2S)-2-Azaniumyl-4-methylsulfanylbutanoate;(2S)-2-Amino-4-(methylsulfanyl)butanoic acid;7005-18-7;24425-78-3;1437749-32-0;1437749-60-4;1437749-65-9;1437749-75-1;1437749-80-8;1437769-00-0;1437870-94-4;1437870-95-5;1437870-97-7;1437870-98-8;1437871-20-9;1463481-01-7;1463481-06-2;1463481-15-3;1463481-19-7;1463481-23-3;1463481-27-7;1463481-31-3;1463481-37-9;1463481-41-5;1463481-46-0;1463481-51-7;1463481-58-4;1463481-73-3;1463481-80-2;1463481-89-1;1463610-75-4;1463610-76-5;1466415-57-5

CAS No.:


Molecular Formula:


Molecular Weight:


Exact Mass:


EC Number:


NSC Number:


NCI Thesaurus Code:



Minute hexagonal plates from dilute alcohol|Colorless or white, lustrous plates or as white, crystalline powder

ATC Code:

V - Various





Appearance: Minute hexagonal plates from dilute alcohol. 
Density: 1.206 g/cm3
Melting Point: 280-282 °C (decomp)
Boiling Point: 123-126 °C @ Press: 15 Torr
Flash Point: 139.4ºC
Refractive Index: 1.531
Water Solubility: H2O: soluble
Storage Conditions: Store at RT.
Vapor Pressure: 8.14X10-8 mm Hg at 25 deg C (est)
Toxicity: LD50 oral in rat: 36gm/kg
Specific rotation: Specific optical rotation: 22.5 deg at 25 °C/D (1 N HCl)
Odor: Faint
Taste: Sulfurous
PH: pH (1% aqueous solution) = 5.6-6.1
PKA: 2.28(at 25 °C)
Henrys Law Constant: Henry's Law constant = 2.11X10-11 atm-cu m/mol at 25 °C (est)
Dissociation Constants: 2.28 (at 25 °C)|pKa = 2.28; pK2 = 9.21
Collision Cross Section:

133.65 Ų [M+H]+ [CCS Type: DT, Method: stepped-field]|152.05 Ų [M-H]- [CCS Type: DT, Method: stepped-field]|127 Ų [M+H]+ [CCS Type: TW, Method: calibrated with polyalanine]|133.1 Ų [M+H]+ [CCS Type: DT, Method: single field calibrated with ESI Low Concentration Tuning Mix (Agilent)]|132 Ų [M-H]- [CCS Type: DT, Method: single field calibrated with ESI Low Concentration Tuning Mix (Agilent)]|134.08 Ų [M+H]+ [CCS Type: DT, Method: stepped-field]|140.5 Ų [M-H]-

Experimental Properties:

Platelets from alcohol. mp 281 °C (decomposes), density 1.340; pKa1 = 2.28, pKa2 = 9.21; pH of 1% aqueous solution 5.6-6.1; Rf value 0.77. Solubility in water (g/L) at 0 °C: 18.18; at 25 °C: 33.81; at 50 °C: 60/.70; at 75 °C: 15.2 °C. Soluble in dilute acids, alkalies. Very slightly soluble in 95% alcohol. Insoluble in ether. /Methionine, DL-form/|UV: 1-65 (Organic Electronic Spectral Data, Phillips et al, John Wiley & Sons, New York) /Methionine (DL)/|Hydroxyl radical reaction rate constant = 5.13X10-11 cu cm/molec-sec at 25 °C (est)

Air and Water Reactions: Reacts with water, steam, and/or acids to produce toxic and flammable vapors of hydrogen sulfide (NTP, 1992). Water soluble (NTP, 1992). pH of 1% aqueous solution is 5.6-6.0.
Reactive Group: Sulfides, Organic
Reactivity Profile: An organosulfide and amine derivative, carbo


Handling and Storage

Precautions 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

Separated from strong oxidants. Well closed.


Amino Acids
Product name Cas No. Product name Cas No.
D-aspartic acid 1783-96-6 DL-Valine 516-06-3
taurine 107-35-7 DL-Leucine 328-39-2
l-lysine base 56-87-1 DL-Threonine 80-68-2
L-Methionine 63-68-3 DL-Methionine 59-51-8
L-Threonine 72-19-5 DL-Alanine 302-72-7
L-Pyroglutamic acid 98-79-3 Glycine 56-40-6
L-Cystine 56-89-3 L-Glutamine 56-85-9
L-Tyrosine 60-18-4 L-Phenylalanine 63-91-2
L-Leucine 61-90-5 L-Proline 147-85-3
L-Isoleucine 73-32-5 L-Histidine Hcl 5934-29-2
L-Valine 72-18-4 L-Histidine 71-00-1
L-Citrulline 372-75-8 L-Tryptophan 73-22-3
L-Arginine 74-79-3 N-Acetyl-L-Tyrosine 537-55-3
L-Arginine monohydrochloride 1119-34-2 N-Acetyl L-Cysteine 616-91-1
L-Glutamic Acid 56-86-0 Creatine Monohydrate 6020-87-7
L-Cysteine Hcl Mono 7048-04-6 Creatine Anhydrous 57-00-1
L-Cysteine Hcl Anhy 52-89-1 L-Aspartic Acid 56-84-8
L-Cysteine 52-90-4 L-Alanine 56-41-7
D-Leucine 328-38-1 L-Theanine 3081-61-6
L-Lysine monohydrochloride 657-27-2 BCAA(Branched Chain Amino Acids)



Packing & Delivery

L-Methionine for food and pharma 0



Our Company

L-Methionine for food and pharma 1

Premium Ingredient Co., Ltd has been producing and distributing amino acids, vitamins, nutrition and food additives for decades, severing for more than 100 clients in the fields of food, beverage, diet supplements, cosmetic, pharmaceutical and animal feeding, exporting to dozens of countries. We supply these products only from the first class Chinese factories with over 10 years producing experiences.


With more than 10 years working experience, Premium Ingredient Co., Ltd offers not only quality products, but also good service, quick response, delivery in time, share up-to-the minute market information, supply one-stop-shop solutions.


We have established a long-term, extensive and deep cooperation with the source to ensure sufficient supplies, stable prices, and rapid shipment. Our 3rd party documents include ISO9001, ISO14001, HACCP, HALAL, KOSHER, GMP, FAMI-QS.


We expect you sending email or coming for negotiation.



Our Factory

L-Methionine for food and pharma 2

L-Methionine for food and pharma 3

L-Methionine for food and pharma 4



Our Research

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Our Certifications

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Q: How long is your delivery time?

A: Generally it is 1-2 weeks..


Q: Do you provide samples ? is it free or extra ?

A: Yes, we could offer the sample for free charge but do not pay the cost of freight.


Q: What's your MOQ ?

A: For the high value product, our MOQ starts from 25kg.


Q: Is there a discount ?

A: Yes, for larger quantity, we always support with better price.


Q: How to confirm the Product Quality before placing orders ?

A: Our products conforms to the internation standard, such as USP, CP, FCC. We can also send you the samples for test. After you confirmed the samples, we will move to the next step for cooperation.


Q: How to start orders or make payments ?

A: You can send our your Purchase order ( if your company has ), or just send a simple confirmation by email or by Trade Manager, and we will send you Proforma Invoice with our bank details for your confirmation, then you can make payment accordingly.


Q: How do you treat quality complaint ?

A: We tested each batch before delivery and only qualified product will be delivery, in case you find any problem about the quality when you received and tested, send email to us, and enclose the photo of the products and 3rd party test reports, We negotiate to resolve these issues, recall or exchange goods, or compensate.


Q: why we choose you ?

A : We ensure ingredient purity, on-time delivery, process efficiency and the technical documents you require.

(1) quality: meet even exceed what you expect.

(2) prices: competitive

(3) service: one stop shop solution, respond soon, delivery fast, share the market information, share the new application of the product.