.

DL-Methionine

Acid-Base Properties of DL-Methionine
DL-Methionine is a neutral amino acid, and its acid-base behavior is derived from the amphoteric nature of the amino and carboxyl groups in its molecule.
Zwitterion formation: In aqueous solutions, DL-methionine exists primarily as a zwitterion (^+H3N-CH(R)-COO^-) via internal proton transfer from the carboxyl group to the amino group. This zwitterionic structure is the dominant form near its isoelectric point (pI=5.74), where the molecule is electrically neutral and has the lowest solubility in water.
Reaction with acids: The amino group (-NH2) can accept protons in acidic conditions, converting the zwitterion into a cationic form (^+H3N-CH(R)-COOH). For example, reacting DL-methionine with dilute hydrochloric acid produces DL-methionine hydrochloride, a salt that is highly soluble in water and suitable for the preparation of liquid formulations.
Reaction with bases: The carboxyl group (-COOH) can donate protons in alkaline conditions, transforming the zwitterion into an anionic form (H2N-CH(R)-COO^-). When DL-methionine reacts with sodium hydroxide, it forms sodium DL-methioninate, which exhibits enhanced water solubility and is widely used in the production of feed additives and nutritional supplements.
pH-dependent solubility: As a neutral amino acid, DL-methionine shows the minimum solubility at its isoelectric point (pH 5.74). In strongly acidic (pH<3) or strongly alkaline (pH>10) solutions, its solubility increases significantly due to the formation of charged ionic species, which is a key principle for its purification via acid-base precipitation.


Отправить запрос, связаться с поставщиком

Кому: Shanghai Yifu Food Ingredients Co., Ltd
Ваш E-mail:
Текст письма:


Send to other suppliers

Другие товары поставщика

DL-Alanine Powder
DL-Alanine Powder Special Notes for Different Grades (Food-Grade vs. Industrial-Grade) Food-grade DL-Alanine: Strictly follow food safety storage standards (e.g., co...
L-Methionine
L-Methionine L-Methionine, as an essential sulfur-containing amino acid, plays multifaceted and irreplaceable roles in the human body, spanning protein synthesi...
DL-Alanine Powder
DL-Alanine Powder DL-Alanine is a low-risk material for microbial growth (due to its amino acid nature, it is not a preferred nutrient for most spoilage microbes und...
Chemical
Chemical L-Methionine plays a pivotal role in maintaining liver function and preventing lipid accumulation: It promotes fatty acid oxidation: By supporting ...
Manufacturer
Manufacturer Metabolism and Safety of L-Methionine L-Methionine is absorbed in the small intestine via amino acid transporters and metabolized primarily in the ...
Все товары поставщика

Похожие товары

High quality N‑Acetyl‑L‑Tryptophan Powder
High quality N‑Acetyl‑L‑Tryptophan Powder Продавец: 846340 Basic Information of N‑Acetyl‑L‑Tryptophan 1. Core Identity Chemical Name: N‑α‑Acetyl‑L‑try...
N-Acetyl-L-Tryptophan
N-Acetyl-L-Tryptophan Продавец: 846340 Key Points for Storing N‑Acetyl‑L‑Tryptophan (NAT) Short, practical storage rules focusing on moi...
N-Acetyl-L-Tryptophan Powder Marke quotation
N-Acetyl-L-Tryptophan Powder Marke quotation Продавец: 846340 Precautions for the Use of N‑Acetyl‑L‑Tryptophan (NAT) Below is a clear, practical summary of pre...
Wholesale N-Acetyl-L-Tryptophan Powder
Wholesale N-Acetyl-L-Tryptophan Powder Продавец: 846340 N‑Acetyl‑L‑Tryptophan as Key Advantages for Food Applications High stability: Withstands processi...
N-Acetyl-L-Tryptophan Supplier
N-Acetyl-L-Tryptophan Supplier Продавец: 846340 N‑Acetyl‑L‑Tryptophan as Regulatory Status (Summary)China: Approved as a food additive (flavor en...