Peptones, agars and ingredients
Lactose
Ingredients (carbohydrates and glycosides).
- Cat. No.
- LC-1902
- Category
- Peptones, agars and ingredients
- Format
- 500 g
- Storage
- 2 to 25 °C
- Minimum guaranteed shelf life
- 15 months
- Standards
- European Pharmacopoeia
Lactose is a disaccharide composed of the monosaccharides glucose and galactose, and it is synthesized only by the cells of the lactating mammary gland. Its empirical formula is C₁₂H₂₂O₁₁. Lactose is one of the three major solid components of milk and its only carbohydrate.
Key features
Applications
Carbon source for general use.
Industry
Ingredients for culture media, manufacturing process.
Standards
European Pharmacopoeia.
Principles and uses
Lactose is used in microbiology as a source of carbon and energy, and also allows differentiating bacteria that can ferment lactose from non-lactose-fermenting bacteria. Lactose utilization is the primary function of lactic acid bacteria used in industrial dairy fermentation.
Disaccharides are sweet, water soluble and crystalline. This disaccharide, along with dextrose, constitutes the most commonly used carbohydrates in biology today.
Technical specifications
| Identification | European Pharmacopoeia |
|---|---|
| Specific optical rotation | +54.4° to +55.9° |
| Heavy metals | < 5 ppm |
| Appearance of solution | European Pharmacopoeia |
| Sulfated ash | max. 0.1% |
| Water (KF) | 4.5-5.5% |
| Absorbance: proteins and light-absorbing impurities [A], 1%, 1 cm at 400 nm | < 0.04 |
| Absorbance: proteins and light-absorbing impurities [A], 1%, 1 cm at 210 to 220 nm | < 0.03 |
| Absorbance: proteins and light-absorbing impurities [A], 1%, 1 cm at 270 to 300 nm | < 0.07 |
| Acidity or alkalinity | European Pharmacopoeia |
| Storage | 2 to 25 °C |
Quality control
| Test | Specification |
|---|---|
| Total aerobic microbial count | max. 100 CFU/g |
| Escherichia coli in 1 g | Negative |
What you receive
The product
Shipped under controlled temperature when the product requires it.
Lot certificate
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Tracked shipment
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Frequently asked questions
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