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L-Methionine

L-Methionine
CAS No.: 63-68-3
Molecular Formula: C5H11NO2S
Molecular Weight: 149.21
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Product Introduction

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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FAQ

Q: Are you a factory or a trading company?

A: We are a company integrating manufacturing and trading.

Q: Can you provide samples for testing before mass production?

A: Of course. We can send you samples free of charge, and we also include a COA. However, you will be responsible for the shipping fee.

Q: How can I get an accurate quote?

A: Please provide the exact product specifications, particle size, color, and intended use, and we will provide you with an accurate quote.

Q: Can you provide a COA?

A: Of course, but only for standard products. If you require an accurate COA, we will produce and test samples before providing you with an accurate COA.

Q: Do you accept ODM or OEM services?

A: Yes, we offer customized services for ingredients, packaging, and labeling. We have strong design capabilities. Please contact us to design your own brand.

Q: Can I visit your factory before placing a large order?

A: Of course. We welcome you at any time.

Q: What is the loading port?

A: Usually Qingdao or Tianjin.

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