Casein Peptone (Tryptone) BAC
Bacteriological tryptone produced by enzymatic digestion of casein. Homogeneous, beige powder — free-flowing and obstruction-free. Total nitrogen ≥ 10% and amino nitrogen ≥ 3.9% on a dry basis, ensuring consistent nitrogen supply in culture media. pH at 2% in water: 6.5–7.5. Ash residue ≤ 15%, loss on drying ≤ 6%. Tryptophan positive; reducing sugars and nitrites negative. Plate count ≤ 5000 cfu, moulds and yeasts ≤ 100 cfu. Store between 2 ºC and 25 ºC; once opened, protect from moisture.
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SKU:
29854
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Casein Peptone (Tryptone) BAC
Bacteriological tryptone produced by enzymatic digestion of casein. Used as a source of organic nitrogen, peptides and amino acids in the preparation of microbiological culture media. CAS: 91079-40-2 | EC: 293-428-4 | TARIC: 35040090.
Technical Specifications
- Appearance: Homogeneous, beige, free-flowing powder. Discard if physical changes are observed.
- Amino nitrogen (dry basis): ≥ 3.9%
- Total nitrogen (dry basis): ≥ 10%
- Ash residue (ignition): ≤ 15%
- pH (2% solution in water): 6.5 - 7.5
- Loss on drying: ≤ 6%
- Reducing sugars: Negative
- Undigested proteins: Negative
- Proteoses: Positive
- Nitrites (NO2): Negative
- Tryptophan: Positive
Microbiological Control
- Standard plate count: ≤ 5000 cfu
- Moulds and yeasts: ≤ 100 cfu
Typical Applications
Standard component in culture media such as TSB, TSA and selective media for fastidious organisms. Tryptophan content makes it suitable for indole testing. Also used in enrichment media and laboratory-scale biomass production.
Applicable in clinical microbiology laboratories, food quality control, research, and culture media manufacturing.
Storage and Handling
- Storage temperature: 2 ºC - 25 ºC
- Once opened: Protect from moisture. Reseal container tightly after each use.
| Brand | LABKEM |
|---|---|
| Grade | Bacteriology Grade |
| CAS | 91079-40-2 |
| EINECS | 293-428-4 |
| Tarix Code (CODCN) | 35040090 |
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