Baird-Parker Agar Base (BPL) - BioReagent

Cat. No.: B1528342

GRADE & PURITY BioReagent

Storage

Room temperature

Shipped In

Normal

Panoramica

For selective isolation and differentiation of Salmonella

Specifications

Specifiche e purezza

BioReagent

Condizioni di conservazione di stoccaggio

Room temperature

Spedito in

Normal

Grado

BioReagent

Product Line

Prodotti biologici

Application Protocols

No item-specific tested applications are provided. The following is general, literature-based guidance for preparing and using Baird-Parker Agar Base.

A. Preparation (literature guidance; adjust per CoA/Spec Sheet):

• Weigh the required mass of dehydrated base per liter of purified water (mass-per-liter Not specified for this item; follow label/CoA).
• Suspend in water with stirring; heat to dissolve completely.
• Autoclave at 121 °C for ~15 minutes.
• Cool to 45–50 °C; aseptically add sterile supplements (e.g., potassium tellurite solution and egg yolk emulsion at manufacturer-recommended volumes). Mix gently and pour plates.

B. Quality control (literature):

• Positive control: A coagulase-positive Staphylococcus aureus strain should produce black/gray, shiny colonies with characteristic zones on supplemented plates.
• Negative control: A non-target organism (e.g., E. coli) should be inhibited or show poor growth.
• Physical checks: Verify pH of prepared medium, clarity, and gel strength; document lot numbers and preparation parameters.

C. Use:

• Dry plates (if needed) to remove surface moisture. Inoculate via spread/spiral plating from serial dilutions. Incubate per SOP. Count characteristic colonies and confirm as required by your method.

All parameters should be validated within your laboratory’s SOPs; this product is for research use only.

Biological Roles

This product itself has no intrinsic biological role as a defined biomolecule; it is a formulated growth medium base. The biological context pertains to the organisms cultured on it and the biochemical interactions driven by the medium’s components (literature):

• Selective pressure: In classic Baird-Parker systems, selectivity (often via potassium tellurite) suppresses many competing flora while permitting staphylococci growth. Tellurite reduction by target organisms contributes to colony darkening (literature).
• Differential reactions: Egg yolk emulsion (added to the base) allows observation of lecithinase and lipase activities manifested as opaque zones or iridescence around colonies. These phenotypes assist presumptive differentiation of coagulase-positive staphylococci (literature).
• Nutritional support: Peptones/yeast derivatives supply amino acids, peptides, vitamins, and growth factors supporting robust colony development and characteristic morphology.

Use-cases (non-clinical, research/industrial microbiology):

• Enumeration and presumptive identification of coagulase-positive staphylococci from environmental, process, or product samples in research and quality labs. Confirmation requires downstream tests per laboratory SOPs.

Note: Specific composition and performance criteria for this item are Not specified; refer to the CoA/Spec Sheet for lot-defined characteristics and any recommended supplements.

Buffer Applications

Not typically applicable. Baird-Parker Agar Base (BPL) is a culture medium base, not a buffering reagent. If pH control is required during preparation, follow the manufacturer’s directions and verify pH of the reconstituted medium as part of standard media QC (literature best practice).

Green Alternatives

While culture media selection is driven by microbiological performance rather than solvent greenness, sustainability can be improved in media workflows.

Opportunities (general guidance):

• Energy efficiency: Optimize autoclave loads and use validated shorter cycles where permitted to reduce energy consumption.
• Waste minimization: Prepare only the volume needed; store poured plates appropriately to extend usable life; autoclave and segregate biohazard waste efficiently.
• Reusable materials: Prefer glass media bottles and stainless-steel tools over single-use plastics when practical and allowed by SOPs.
• Water stewardship: Use appropriately purified water without over-specifying beyond requirements; capture cooling water where facility systems allow.

Comparison of approaches (literature-based, illustrative):

• Dehydrated media prepared in-house: Lower shipping weight/volume; customizable; requires energy for sterilization and generates steam demand; glassware cleaning impacts water/chemicals.
• Ready-to-use plated media: Higher shipping footprint per plate; reduces on-site energy/water use and improves batch-to-batch consistency; may increase plastic waste.

Trade-offs should be evaluated within your quality system, considering performance, throughput, and environmental metrics (e.g., energy per usable plate, plastic use, waste heat recovery).

Pharmaceutical Uses

No therapeutic use. For research use only (as per Product Data).

Relevant roles in pharma/biotech laboratories (non-clinical; literature):

• Environmental monitoring and microbiological QC: When prepared with appropriate supplements, plates can be used in laboratory workflows to enumerate or presumptively identify coagulase-positive staphylococci from non-sterile areas, utilities, or raw materials as defined by internal SOPs.
• Method development and validation: Useful as part of selectivity and recovery studies during suitability testing for microbial limits methods.
• Training and proficiency testing: Standardized media provide consistent performance for internal competency assessments.

Regulatory and documentation considerations:

• This product is supplied as BioReagent grade for research/lab use. It is not certified to pharmacopeial monographs unless explicitly stated. Any use in regulated QC must be qualified internally; retain CoA/Spec Sheet and SDS for each lot and perform growth-promotion testing per your procedures.

Note: Item-specific pharmacopeial status, performance ranges, and supplements are Not specified for this item; refer to CoA/Spec Sheet.

Physical Properties

As a dehydrated medium mixture, discrete molecular physical constants are not applicable. Item-specific values are not provided for this SKU.

• Appearance: Not specified for this item; refer to CoA/Spec Sheet. (Typically a free-flowing beige/tan powder; literature.)
• Solubility: Intended to dissolve/disperse in purified water during medium preparation (literature). Complete dissolution often requires heating and agitation.
• pH (prepared medium): Not specified for this item; refer to CoA/Spec Sheet. (Manufacturers of Baird-Parker media typically specify a target pH at 25 °C after sterilization; literature.)
• Melting/boiling point, density, refractive index, logP, pKa: Not applicable for this multi-component solid mixture; not meaningful in the context of a culture medium.

Preparation-related properties (general guidance; literature):

• Gelling: Solidifies upon cooling due to agar component; gel strength depends on agar content and total solids.
• Heat stability: Sterilized by autoclaving; some selective components are heat-sensitive and are commonly filter-sterilized and added aseptically after cooling the base to ~45–50 °C (literature).

Always consult the lot-specific CoA/Spec Sheet for definitive physical specifications (e.g., moisture limit, pH of a defined % w/v solution) where applicable.

Quality and Grades

• Grade: BioReagent (as provided in Product Data)

What BioReagent grade typically implies (general guidance):

• Intended for laboratory research and biological applications, including preparation of culture media and microbiological QC workflows.
• Emphasis on consistent performance characteristics (e.g., growth recovery, selectivity, and differential response) rather than ultra-trace analytical purity metrics.

Item-specific notes:

• Purity specifications, performance parameters (e.g., growth of target organisms and inhibition of non-targets), and supplement compatibility are Not specified for this item; refer to CoA/Spec Sheet.
• Stabilizers/antimicrobials: Not specified for this item; refer to CoA/Spec Sheet. Dehydrated media typically contain no added antimicrobial preservatives; sterility is achieved by autoclaving after reconstitution (literature).

Quality verification in practice (literature):

• Performance testing with reference strains (positive/negative controls) to confirm selectivity/differential features after adding required supplements (e.g., tellurite and egg yolk for classic Baird-Parker formulations).
• Physical QC such as moisture content, freedom from caking, and pH of a defined % w/v solution before/after sterilization.

Compliance and documentation:

• For regulated workflows, retain the CoA/Spec Sheet and SDS for each lot, and perform in-house qualification using your SOPs.

Reaction and Applications

Chemical reaction applications are not applicable to this product. Instead, its relevance is in microbiological culture.

Microbiological applications (literature):

• Selective/differential plating of staphylococci: When supplemented (commonly with egg yolk and potassium tellurite), Baird-Parker Agar supports growth of coagulase-positive staphylococci with distinctive black/gray, shiny colonies often surrounded by clear zones (lipase/lecithinase activity).
• Enumeration workflows: Employed in serial dilution and plate count methods in research and industrial QC labs (e.g., food, cosmetics, environmental samples). Incubation regimes are method-dependent.
• Confirmatory testing: Colonies may be followed by coagulase tests, latex agglutination, or molecular identification methods for confirmation (outside the scope of the medium itself).

Practical tips (general):

• Medium preparation: Fully dissolve the base in purified water with heat and agitation. Autoclave; then add sterile, heat-labile supplements aseptically at ~45–50 °C. Pour plates promptly to ensure uniform gel strength and surface.
• Performance controls: Include positive control (coagulase-positive staphylococcal strain) and negative control (e.g., E. coli or other non-target) to verify selectivity each batch.
• Plate quality: Avoid overheating to preserve agar gel properties. Keep plates free of condensation by equilibrating lids ajar in a laminar-flow hood after pouring.

Reaction Conditions

Chemical reaction conditions are not applicable. The relevant “conditions” are those for medium preparation and microbiological culture (general guidance; literature):

• Reconstitution: Disperse the measured mass of dehydrated base into purified water with agitation. Heat to near boiling to ensure complete dissolution. The exact mass per liter is Not specified for this item; refer to CoA/Spec Sheet.
• Sterilization: Autoclave at 121 °C for approximately 15 minutes. Avoid prolonged overheating to preserve agar gel strength.
• Supplementation: Cool the sterilized base to ~45–50 °C. Aseptically add sterile, heat-labile supplements (e.g., potassium tellurite solution and egg yolk emulsion for classical Baird-Parker applications; literature). Mix gently to avoid bubbles.
• Plate pouring: Pour into sterile Petri dishes under aseptic conditions. Allow to solidify; dry plates as needed in a biosafety cabinet to remove surface moisture before use.
• Incubation (microbiological): Incubation temperatures and durations depend on your SOP and target organism. Record any appearance of characteristic colony morphologies and zones.

Always confirm cycle parameters, supplement concentrations, and QC acceptance criteria using the item’s CoA/Spec Sheet and your laboratory SOPs.

Safety and Handling

GHS classification and specific hazard statements are not supplied in the Product Data for this item. Always review the product’s SDS for authoritative safety information.

• GHS status: Not specified for this item; refer to SDS.
• Signal word / H-statements / pictograms: Not specified for this item; refer to SDS.

General laboratory safety guidance (good practice):

• PPE: Wear lab coat, safety glasses, and appropriate gloves. Use a dust mask or work in a fume hood if dust generation is possible during weighing to avoid respiratory irritation (literature best practice for dehydrated media).
• Hygiene: Avoid inhalation and contact with eyes/skin. Wash thoroughly after handling.
• Incompatibilities: Avoid exposure to strong oxidizers and strong acids/bases when preparing solutions; store away from moisture to prevent caking and microbial contamination (general guidance).
• Autoclaving: Use heat-resistant glassware; do not tightly cap vessels during sterilization. Exercise caution when handling hot media; allow pressure to normalize before opening the autoclave.
• Microbiological risk: Once reconstituted and inoculated, plates/broths contain live microorganisms. Handle using BSL-appropriate practices, contain spills with disinfectant (e.g., 70% ethanol or 10% bleach), and autoclave waste before disposal (institutional biosafety policies).
• First aid (overview): If inhaled, move to fresh air. In case of eye/skin contact, rinse with water for several minutes. If ingested or in case of persistent irritation, seek medical attention. Defer to SDS for details.

Solvent Selection

This product is not a solvent. However, proper choice of diluent and processing parameters is critical for successful medium preparation.

• Primary diluent: Purified/deionized water suitable for microbiological media (literature). Avoid high ionic strength or residual disinfectants.
• Miscibility: The dehydrated medium disperses/dissolves in water upon heating and stirring. Organic solvents are not used.
• Sterilization: Typically autoclaved at 121 °C for ~15 minutes. Heat-labile selective supplements (e.g., potassium tellurite, egg yolk emulsion) are commonly filter-sterilized separately and added aseptically to the cooled (~45–50 °C) base (literature).
• Degassing/clarity: Gentle heating with stirring helps achieve clarity; avoid scorching. Foam formation can be minimized by moderate agitation and controlled heating.

When to choose Baird-Parker Agar Base (general use-case positioning):

• Select when you require a selective/differential medium for enumeration and presumptive identification of coagulase-positive staphylococci, after addition of the recommended supplements (literature). Alternatives include mannitol salt agar for high-salt selection, but Baird-Parker with egg yolk/tellurite offers characteristic colony morphology and lecithinase/lipase reactions (literature).

Storage and Reconstitution

• Storage conditions (as provided): Room temperature. Keep container tightly closed, dry, and protected from humidity to prevent caking and premature degradation. Avoid high heat and direct sunlight.
• Shipping: Normal (as provided).
• Research use note: For research use only (as provided).

Reconstitution and sterilization (general literature guidance; not item-specific):

• Water quality: Use purified/deionized water suitable for microbiological media.
• Concentration: The grams per liter required for the base and for each supplement are Not specified for this item; refer to the product label/CoA/Spec Sheet.
• Dissolution: Add powder to water with agitation; heat to near boiling until fully dissolved.
• Sterilization: Autoclave at 121 °C for ~15 minutes. Do not over-sterilize to preserve agar gel strength.
• Supplement addition: Cool to ~45–50 °C; aseptically add sterile, heat-labile supplements (e.g., egg yolk and tellurite for classical Baird-Parker formulations; literature) and mix gently.
• Plate handling: Pour into sterile Petri dishes. Allow to solidify and, if needed, dry plates in a biosafety cabinet. Store finished plates wrapped/covered at 2–8 °C to maintain performance, per your SOP.

Always consult the lot-specific CoA/Spec Sheet and your laboratory SOPs for exact preparation parameters and acceptance criteria.

Structure and Identity

This product is a complex dehydrated microbiological medium (mixture), not a single defined molecule. Accordingly, single-molecule identifiers do not apply.

• SKU: B1528342
• Product Name: Baird-Parker Agar Base (BPL)
• Type: Dehydrated culture medium base (mixture); used to prepare selective/differential plates for staphylococci after addition of appropriate supplements
• Molecular formula: Not applicable to a mixture (Not specified for this item; refer to CoA/Spec Sheet.)
• Molecular weight: Not applicable to a mixture (Not specified for this item; refer to CoA/Spec Sheet.)
• SMILES / InChI / InChIKey / CAS / CID: Not applicable for a multi-component medium

Structural description (general knowledge):

• The formulation typically contains complex peptones and yeast derivatives (nitrogen, vitamins), selective agents, and agar as a gelling polysaccharide (literature). As a “Base,” selective/differential functions are finalized by adding supplements (e.g., egg yolk and potassium tellurite; literature). No single covalent structure represents the product.

Identity verification in practice:

• Lot identity is typically confirmed by growth performance testing with positive/negative control strains (e.g., coagulase-positive Staphylococcus aureus as a positive control; literature). Analytical fingerprints (e.g., moisture, pH of 1.0–1.5% w/v solution) are commonly used by manufacturers; consult the item’s CoA/Spec Sheet for lot-specific criteria.

Synthetic Utility

Not applicable. Baird-Parker Agar Base (BPL) is not a synthetic building block or reagent for chemical transformations. It is a dehydrated microbiological medium base intended for preparation of selective/differential agar plates after addition of appropriate supplements. For experimental workflows, see sections on Reaction & Applications and Application Protocols (media preparation).

Target Specificity

No antibody, probe, or biochemical ligand is included; therefore, classical immuno/biomolecular target specificity does not apply.

Microbiological selectivity context (literature):

• When appropriately supplemented (e.g., egg yolk and tellurite), Baird-Parker Agar is selective/differential for coagulase-positive staphylococci. Selectivity arises from inhibitory agents and high enrichment for staphylococcal growth while many Gram-negatives and non-target Gram-positives are suppressed.

Note: This is general literature information. Item-specific selectivity claims or validated organism recovery ranges are Not specified for this item; refer to CoA/Spec Sheet and perform in-house growth-promotion testing.