company news about Acid-hydrolyzed casein: A classic, fundamental nitrogen source reagent for microbiological experiments.

CAS No.: 65072-00-6 | English Name: Acid Hydrolyzed Casein

Source and Preparation: Produced from bovine milk casein through strong acid hydrolysis, followed by desalting, decolorization, purification, and drying; it is a standard protein hydrolysate reagent widely used in biological laboratories.

Physicochemical Properties: Off-white to pale yellow powder with excellent water solubility; the resulting solution is clear and transparent, making it suitable for preparing various precision microbiological culture media.

Compositional Characteristics: Rich in free amino acids and small-molecule short peptides; the strong acid hydrolysis process completely destroys natural vitamins and growth factors, resulting in a clean composition with minimal interference.

Core Laboratory Applications

1. Basic Microbial Culture and Strain Preservation: Widely used for the resuscitation, subculturing, purification, and preservation of common bacteria such as *E. coli*, *Staphylococcus*, and *Streptococcus*; it serves as a standard, fundamental nitrogen source in microbiology laboratories.
2. Antimicrobial Susceptibility Testing and Standardized Assays: A core ingredient in MH (Mueller-Hinton) medium used for bacterial antibiotic susceptibility testing; also suitable for standardized assays such as microbiological vitamin quantification, minimizing experimental errors caused by interfering factors.
3. Research on Strain Function and Metabolism: Used for the *in vitro* expansion and culture of engineered and pathogenic bacteria, supporting research into mechanisms such as bacterial metabolites, enzymatic activity, and toxin expression.
4. Biology Education and Research-Oriented Teaching: Suitable for hands-on microbiology training in universities and research institutes; used to prepare standardized media in batches for basic educational experiments, including colony observation and strain isolation and identification.

Summary: Characterized by high purity, stable nutritional content, low interference, and broad compatibility, acid-hydrolyzed casein has become an indispensable nitrogen source reagent for laboratories in microbiology, molecular biology, and strain engineering, serving as a classic raw material for various standardized microbiological experiments.

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