Soy Peptone CAS 91079-46-8

Soy Peptone – Papain Digest of Defatted Soybean Meal for Microbial Culture

Basic Information

• Product Name: Soy Peptone

• CAS Number: 91079-46-8

• Appearance: Light yellow powder

• pH: 5.5–7.0 (20 g/L, H₂O, 20°C)

• Solubility: Slightly cloudy to cloudy solution, yellow to brownish-yellow in color

Overview
Soy peptone is a high-quality enzymatic digest of defatted soybean meal produced using papain. It provides a rich source of amino acids, peptides, vitamins, and other growth factors essential for the cultivation of a wide range of microorganisms, including bacteria, fungi, and yeasts. Its balanced nutritional profile makes it a valuable ingredient in microbiological culture media and fermentation processes.

Applications

• Microbial culture: Supports growth of bacteria, fungi, and other microorganisms for laboratory research and industrial fermentation.

• Antibiotic production: Used in the fermentation of flavomycin, nisin, avermectin, aureomycin, and other pharmaceutical compounds.

• Biotechnology: Employed in the production of xanthan gum, gellan gum, hyaluronic acid, amino acids, and vitamins.

• Food and beverage: Used in fermented foods, health foods, sports nutrition, and infant formula.

• Clinical and sanitary testing: Serves as a nutrient base for diagnostic media and quality control tests.

Key Benefits

• Excellent source of nitrogen and carbon for microbial growth.

• Provides essential vitamins and minerals.

• Consistent quality and batch-to-batch reproducibility.

• Suitable for a wide range of microorganisms, including fastidious strains.

• Non-animal origin – suitable for vegetarian and halal applications.

Recommended Use
Typical concentration in culture media ranges from 0.5% to 2.0% (w/v), depending on the target microorganism and application. Optimize through trial runs.

Handling and Storage

• Store in a cool, dry place, away from moisture and direct sunlight.

• Keep containers tightly sealed to prevent caking and contamination.

• Use appropriate personal protective equipment (gloves, dust mask) when handling.

Packaging
Available in 1 kg, 5 kg, 10 kg, 25 kg bags, and custom packaging upon request.

Quality Assurance
Each batch is tested for total nitrogen, amino nitrogen, moisture, ash, pH, and microbial load to ensure consistent performance.