Dextrose Starch Agar- 1 Kg Packs

Dextrose Starch Agar is a dehydrated microbiological culture medium formulated to support the cultivation of selected microorganisms, particularly fastidious bacteria, under appropriate laboratory conditions. A commonly used formulation contains proteose peptone, dextrose (glucose), soluble starch, sodium chloride, disodium phosphate, gelatin, and agar. Dextrose provides a readily available carbohydrate source, soluble starch contributes to the medium’s nutritional properties, peptone and gelatin supply nitrogen-containing nutrients, and agar provides solidification. The medium is used in microbiology teaching, controlled cultivation procedures, and research investigations involving microbial growth. Depending on the formulation, it can support the propagation of organisms such as Neisseria and certain Streptococcus species. Its suitability depends on the specified composition, preparation method, and intended organism. Lab Wale offers Dextrose Starch Agar in 1 kg packs for appropriate institutional, educational, and research laboratory applications.

Product Specifications

Key Features of Dextrose Starch Agar

• Multi-component nutrient medium: Common formulations combine dextrose, soluble starch, peptone, gelatin, mineral salts, and agar to provide nutrients and a solid growth surface.
• Carbohydrate-containing formulation: Dextrose supplies an accessible carbon source, while soluble starch contributes additional carbohydrate material to the medium.
• Support for fastidious microorganisms: Established formulations are used to cultivate selected nutritionally demanding bacteria under suitable incubation conditions.
• Defined preparation requirements: Commercial formulations commonly specify a final pH near 7.3 at 25°C, although the exact value depends on the product.
• Research and educational relevance: Suitable for supervised microbiology practicals, microbial cultivation studies, and selected culture-medium investigations.

Laboratory Applications of Dextrose Starch Agar

• Microbiology teaching practicals: Used in supervised college and university laboratory sessions to demonstrate culture-medium preparation, aseptic handling, and microbial growth.
• Cultivation of selected bacteria: Appropriate formulations support the propagation of organisms such as Neisseria gonorrhoeae and other specified fastidious bacteria in suitably equipped laboratories.
• Microbial growth investigations: Used in research procedures examining growth responses under controlled conditions when the medium meets the organism’s nutritional requirements.
• Antimicrobial susceptibility research: Specific validated protocols have used Dextrose Starch Agar in agar-dilution studies involving Neisseria species; the method and formulation must be appropriate for the intended investigation.
• Culture-medium preparation training: Supports practical instruction in reconstituting dehydrated media, dissolving ingredients, sterilisation, and aseptic dispensing according to manufacturer instructions.

Why Choose Lab Wale to Buy Dextrose Starch Agar

Lab Wale provides a convenient sourcing option for laboratory chemicals, microbiological media, and scientific supplies for schools, colleges, universities, research centres, and laboratory professionals. When purchasing Dextrose Starch Agar, consider the intended microorganisms, formulation, preparation requirements, and laboratory application. Reviewing available product specifications and relevant safety information helps institutions select a suitable medium for their procedures. The 1 kg pack offers a practical purchasing format for laboratories with appropriate usage requirements, subject to the product’s stated specifications and availability.

Frequently Asked Questions About Dextrose Starch Agar

What is Dextrose Starch Agar used for in microbiology?

Dextrose Starch Agar is used to cultivate selected microorganisms, particularly certain fastidious bacteria. Depending on its formulation, it can support organisms such as Neisseria gonorrhoeae and other specified bacteria. Its use should follow a validated microbiological method and appropriate biosafety procedures.

What are the main ingredients of Dextrose Starch Agar?

A commonly used formulation contains proteose peptone, dextrose, soluble starch, sodium chloride, disodium phosphate, gelatin, and agar. These ingredients provide nutrients, a carbohydrate source, osmotic balance, buffering, and solidification. Exact concentrations can vary between manufacturers, so preparation instructions should match the supplied product.

Does Dextrose Starch Agar have a molecular formula or CAS number?

No single molecular formula, empirical formula, molecular weight, or CAS Registry Number describes the complete medium because it is a mixture of several ingredients. Individual components, such as dextrose and sodium chloride, have their own chemical formulas and identifiers.

How is Dextrose Starch Agar prepared for laboratory use?

Preparation depends on the formulation. A common procedure involves suspending the specified quantity of dehydrated medium in purified water, heating until completely dissolved, dispensing as directed, and sterilising using the prescribed validated cycle. Follow the manufacturer’s instructions for the exact medium, intended organisms, and required incubation conditions.

How should Dextrose Starch Agar be stored and handled safely?

Store the dehydrated powder in a tightly closed container in a dry location, protected from moisture and excessive heat. Wear appropriate laboratory clothing, gloves, and eye protection, and minimise dust generation. Handle inoculated media using suitable biosafety controls, and decontaminate used cultures and materials according to institutional procedures before disposal.

Storage Conditions for Dextrose Starch Agar

Store Dextrose Starch Agar in its original, tightly closed container in a dry, well-ventilated area protected from moisture, contamination, and excessive heat. Many commercial formulations specify storage below 30°C, but the exact temperature should follow the supplied product instructions. Close the container promptly after dispensing to reduce moisture absorption and preserve the medium’s intended properties.

Precautions for Handling Dextrose Starch Agar

Review the relevant Safety Data Sheet and preparation instructions before use. Wear a laboratory coat, suitable gloves, and safety goggles, and avoid inhaling airborne powder during weighing or transfer. Use appropriate equipment for heating and sterilisation, and follow aseptic techniques when dispensing the medium. Handle microbial cultures with appropriate biosafety controls, and decontaminate used media and contaminated materials through validated institutional procedures before disposal.