L-Methionine

L-Methionine

CAS No.: 63-68-3
Molecular Formula: C5H11NO2S
Molecular Weight: 149.21
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product description
L-methionine is a sulfur-containing essential L-amino acid that is important in many body functions. Methionine is a dietary indispensable amino acid required for normal growth and development of humans, other mammals, and avian species. In addition to being a substrate for protein synthesis, it is an intermediate in transmethylation reactions, serving as the major methyl group donor.


Chemical Properties

PropertyValue

Melting point

284 °C (dec.)(lit.)

Alpha

23.25 º (c=2, 6N HCl)

Boiling point

393.91°C (estimate)

Density

1,34g/cm

Bulk density

550kg/m3

Refractive index

1.5216 (estimate)

Storage temp.

20-25°C

Solubility

1 M HCl: 0.5 M at 20 °C, clear, colorless

Pka

2.13(at 25℃)

Form

Solid

Color

White

Odor

Slight characteristic

PH

5-7 (10g/l, H2O, 20℃)

biological source

synthetic

Optical Rotation

[α]20/D +23.7±0.5°, c = 5% in 5 M HCl

Water Solubility

Soluble

λmax

λ: 260 nm Amax: 0.40λ: 280 nm Amax: 0.05

Merck

14,5975

BRN

1722294

Stability

Stable. Incompatible with strong oxidizing agents.

LogP

0.217 (est)

CAS DataBase Reference

63-68-3(CAS DataBase Reference)

NIST Chemistry Reference

L-Methionine(63-68-3)

EPA Substance Registry System

L-Methionine (63-68-3)


Safety Information

PropertyValue

Risk Statements

33

Safety Statements

24/25

WGK Germany

2

RTECS

PD0457000

F

10-23

TSCA

Yes

HS Code

29304010

Hazardous Substances Data

63-68-3(Hazardous Substances Data)

Toxicity

LD50 oral in rat: 36gm/kg


Product Usage

L-Methionine is an essential sulfur-containing amino acid that serves as a fundamental building block for protein synthesis and a key methyl donor in various metabolic pathways. In the animal feed industry, it is a critical additive, especially for poultry and swine, to balance amino acid profiles, promote healthy growth, and improve feather or fur quality. In the pharmaceutical sector, L-Methionine is utilized as an active ingredient in hepatoprotective drugs to support liver detoxification and treat fatty liver diseases. It is also a staple in the nutraceutical industry, where it is included in dietary supplements for hair, skin, and nail health, as well as formulations targeting joint support. Additionally, it serves as a high-value chemical intermediate in the synthesis of specialized flavorings and as a nutrient component in biomedical cell culture media.

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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.
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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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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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