Casein Meat Peptone E2
Used as a source of nitrogen, vitamins, and minerals in industrial and food fermentations and in laboratory culture media, where its multi-source composition supports efficient growth and metabolism across a wide range of microorganisms.
- Category
- Peptones & Protein Hydrolysates
- pH (25 °C)
- 5.5 - 7.0
- Appearance
- Beige powder
- Pack sizes
- 500 g · 5 kg · 25 kg
- Raw material
- Casein
- Certifications
- ISO 22000 · Halal
Data updated：2026-11-06
- Allergens
- Milk
Overview
A fine beige powder combining hydrolysates of casein and meat protein, offering a broader and more balanced spectrum of peptides and amino acids than single-source peptones. Rich in readily assimilable protein, it also supplies B-complex vitamins, nucleotides, and other growth factors. Raw materials are of animal (milk and meat) origin.
Beef peptone or beef extract
Beef peptone is enzymatically hydrolysed meat protein, mainly peptides, and the main nitrogen source in nutrient media. Beef extract is the water-soluble extract of meat, naturally containing vitamins, minerals and small nitrogenous molecules; it is used in small amounts mainly for growth factors. Fastidious organisms and nutrient media often use both. Where Halal or bovine-free material is required, look at soy, yeast or plant peptones instead.
Specifications
| Parameter | Specification |
|---|---|
| Appearance | Beige powder |
| Total nitrogen TN | ≥ 11.5 % |
| pH (2 % solution) | 5.5 - 7.0 |
| Loss on drying | ≤ 9.0 % |
| Chlorides (as NaCl) | ≤ 4.0 % |
| Total aerobic microbial count | ≤ 10,000/g |
| Staphylococcus aureus | absence/10g |
| Salmonella | absence/25g |
| Escherichia coli | absence/g |
| Coliforms | ≤ 10/g |
| Yeasts and moulds | ≤ 100/g |
Release specifications. Actual values are reported on the COA supplied with each batch.
Product highlights
- Food-grade raw materials, produced in an ISO 22000 certified facility
- Halal certified, suitable for the Malaysian, Indonesian, and Middle Eastern markets
- Available in 500 g / 5 kg / 25 kg, from laboratory to industrial scale
- COA, specification sheet, and technical data sheet available; samples on request
- Manufactured in Taiwan with reliable supply
Food grade versus laboratory grade
Most culture media suppliers use laboratory-grade raw materials, which are held to lower standards for heavy metal residues, microbial contamination control, and traceability. That is adequate for pure research but not for applications with stricter raw-material requirements. STBIO manufactures with food-grade raw materials throughout, in a facility certified to ISO 22000 food safety management.
- Food microbiology laboratories working to ISO 17025 or equivalent requirements
- Biotech manufacturers exporting fermentation products and needing full raw-material traceability
- Organisations with ESG or compliance audit requirements across their supply chain
- Companies sourcing both Halal and non-Halal products who need one consistent material grade
Frequently asked questions
01Which organisms is it suitable for?
Lactic acid bacteria. See the cultural response table and the specification sheet.
02Can it be used for food-grade applications?
Yes. It is made from food-grade raw materials in an ISO 22000 certified facility and is suitable for culturing starters for fermented products that are consumed directly.
03Is there a non-Halal version?
Yes. This is the Halal certified version; an equivalent standard version is also available.
04How do I request a bulk quotation, and can you provide a COA?
Yes. This product is available in 500 g, 5 kg, 25 kg. Tell us your application and volume when requesting a quotation; we reply within one working day and can supply the COA, specification sheet, and technical data sheet.
Academic citation
Products from this range have been cited as the culture media source in a peer-reviewed study by a National Taiwan University research team:
Chan et al. (2024). Single-strain probiotics enhance growth, anti-pathogen immunity, and resistance to Nocardia seriolae in grey mullet (Mugil cephalus) via gut microbiota modulation. Animal Microbiome, 6, 67. Springer Nature.
Media attribution: Tryptone Soy Broth, MRS medium, LB broth, beef extract, peptone, yeast extract, agar (STBIO, New Taipei, Taiwan)
Read the full paperUsed in these applications
- Targeted Nutrient Booster SeriesTargeted supplements of amino acids, B vitamins, nucleotides and trace minerals matched to the organism and fermentation stage, resolving nutrient limitation, slow growth and poor yield.
- Recombinant Protein Expression Nutrient SeriesAmino acids, peptides and growth factors that support recombinant protein expression and soluble protein yield. For recombinant E. coli, vaccine antigens, industrial enzymes and biopharmaceutical production.