Peptone Water - BioReagent

Cat. No.: P1523294

GRADE & PURITY BioReagent

Storage

Room temperature

Shipped In

Normal

Vue d’ensemble

Used for indigo matrix testing.

Specifications

Spécifications et pureté

BioReagent

Conditions de stockage de stockage

Room temperature

Expédié en

Normal

Grade

BioReagent

Product Line

Produits biologiques

Application Protocols

Item-specific, tested applications: Not specified for this item; refer to CoA/Spec Sheet and product label.

General protocol examples (literature; not item-specific)

1. Preparation (powdered format)

• Weigh the recommended mass of peptone water powder for the desired volume (literature example: 15 g/L for a common formulation with peptone and NaCl). Add to ~80% of final volume of purified water, stir to dissolve, adjust pH to ~7.2 at 25 °C, bring to volume, and autoclave at 121 °C for 15–20 min.

2. Use as diluent for serial dilutions

• Aseptically dispense sterile Peptone Water into dilution tubes. Add sample, mix thoroughly, and perform serial ten-fold dilutions as per method. Plate appropriate dilutions on selective/differential agar for enumeration (literature practice).

3. Pre-enrichment

• Inoculate sterile Peptone Water with test sample, incubate under method-specified conditions (e.g., 18–24 h at 35–37 °C, organism- and method-dependent), then transfer aliquots to selective enrichment media (literature practice).

Note

• These examples are provided for context. Follow your lab’s SOPs, regulatory methods, and the item’s CoA/Spec Sheet for definitive instructions.

Biological Roles

Item-specific facts

• None specified for this item; refer to CoA/Spec Sheet for any lot-specific performance data (e.g., growth promotion).

General biological context (literature)

• Nutrient source: Peptone Water supplies amino acids, small peptides, and minerals that support maintenance metabolism and recovery of a broad spectrum of non-fastidious bacteria.
• Osmotic balance: Inclusion of NaCl (in many formulations) maintains isotonic conditions, reducing osmotic stress during dilutions and resuscitation.
• Minimal selectivity: The medium is non-selective and non-differential, making it suitable for unbiased pre-enrichment before transfer to selective media.
• Application domains: Widely used in food and environmental microbiology, industrial hygiene testing, and general microbiology teaching and research—always within research or laboratory QA contexts.

Mechanistic note (literature)

• The peptides and amino acids enter cellular metabolism via transporters and are catabolized through pathways such as deamination and the TCA cycle intermediates, providing energy and biosynthetic precursors for repair and limited growth under dilute nutrient conditions.

Buffer Applications

Applicability

• Peptone Water is not a defined buffering system; its buffering capacity is limited and arises from amino acid side chains and, where present, added salts.

General guidance (literature)

• Working pH: Typical peptone water preparations are adjusted to near neutral pH (around 7.2 at 25 °C; literature example). This is adequate for many general microbiological manipulations but provides weaker buffering than dedicated systems (e.g., phosphate, HEPES).
• Use as diluent: For serial dilutions or sample rinses, its slight buffering can help maintain pH near neutrality compared with pure water, aiding cell recovery.
• When stronger buffering is needed: Use Buffered Peptone Water or classic buffer systems (phosphate buffer pH 7.2–7.4) to stabilize pH during sample processing or incubation.

Recipes (literature example; not item-specific)

• Example composition per liter: Peptone 10 g, NaCl 5 g, purified water to 1 L; adjust pH to ~7.2 at 25 °C. Sterilize by autoclaving. This is provided for context only; follow the item’s CoA/Spec Sheet for the correct preparation.

Note: For analytical methods that specify exact buffer capacity or ionic strength, use a defined buffer rather than Peptone Water.

Green Alternatives

Context

• Peptone Water is an aqueous, largely benign medium. Environmental considerations primarily relate to sourcing (animal- vs. plant-derived peptones), energy for sterilization, and biohazard management after use.

Greener choices and practices (literature)

• Source of peptone: Consider plant- or microbial-derived peptones to reduce reliance on animal byproducts when method-appropriate.
• Energy: Optimize autoclave loads and cycles; use validated shorter cycles where allowed to save energy.
• Waste: Deactivate biologicals by autoclaving at end-of-life and segregate waste to reduce chemical disinfectant usage.

Comparison (general, literature)

• Peptone Water vs. Buffered Peptone Water: Buffered formulations can reduce repeat sterilizations due to improved stability of pH-sensitive supplements, potentially lowering overall resource use in some workflows; however, they add phosphate salts, modestly increasing mineral load in effluent.
• Peptone Water vs. saline (0.85% NaCl): Saline has lower nutrient load and may reduce downstream biological oxygen demand (BOD) in waste but may provide less recovery of stressed cells.

Note: Select media according to method requirements; environmental benefits should not compromise required analytical performance.

Pharmaceutical Uses

Item-specific facts

• No pharmacopeial status or excipient specifications are provided for this item. Not specified for this item; refer to CoA/Spec Sheet.

General laboratory/manufacturing context (literature)

• Environmental monitoring and microbiological QC: Peptone Water may be used in research and quality-control laboratories for sample dilutions, rinse fluids, and non-selective pre-enrichment during microbial limits testing workflows. It is not a therapeutic agent.
• Media preparation: Serves as a base medium for process hygiene checks and utility monitoring in research/manufacturing settings where non-selective recovery is desired.
• Compatibility: When documentation to pharmacopeial monographs (e.g., USP/EP media) is required, use the exact specified medium and verify growth promotion tests; do not substitute without validation.

Important

• For research use only (per Product Data). Not for human or animal therapeutic or diagnostic use. For regulated applications, consult applicable compendia and validate suitability.

Physical Properties

Item-specific facts (from Product Data)

• Appearance: Not specified for this item; refer to CoA/Spec Sheet.
• Storage Conditions: Room temperature (as provided).
• Shipped In: Normal (as provided).
• Boiling point, melting point, density, pH, osmolality, refractive index: Not specified for this item; refer to CoA/Spec Sheet.

Literature/general values and notes (for typical peptone water)

• Physical state (dry blend vs. solution): Commercial offerings may be supplied as a dry-blended powder to be reconstituted, or as ready-to-use solution; confirm with CoA/label for this specific item.
• Typical composition (literature example): Peptone 10 g/L and NaCl 5 g/L in purified water; pH around 7.2 ± 0.2 at 25 °C. This information is general and not item-specific.
• Solubility: Readily water-soluble (peptones and NaCl are water compatible; literature).
• Ionic strength: Moderately ionic when NaCl is present, supporting osmotic balance for many bacteria (literature).
• Appearance (typical): Clear to slightly opalescent, pale yellow solution after sterilization; may darken slightly upon autoclaving due to Maillard-type browning of peptides (literature).

Important: For authoritative specifications (pH tolerance, fill volume, sterility status, endotoxin/bioburden levels), consult the item’s CoA/Spec Sheet.

Quality and Grades

Item-specific facts (from Product Data)

• Grade/Purity: BioReagent.

What BioReagent grade implies (general)

• BioReagent is intended for research and laboratory applications where biological compatibility, reproducible performance, and low levels of inhibitory contaminants are important. While not a pharmacopeial grade, BioReagent materials are typically suitable for routine microbiology, molecular biology support steps (e.g., dilutions, rinses), and general life science workflows.

Considerations specific to peptone media (general)

• Nutritional consistency: Performance of peptone-based media can vary with source and processing of the enzymatic digest. BioReagent-grade peptone water is expected to offer batch-to-batch consistency appropriate for research.
• UV background/endotoxin/metals: Not specified for this item; refer to CoA/Spec Sheet.
• Sterility: Not specified for this item; refer to product label and CoA. Some formats are supplied sterile and ready-to-use; others require sterilization.
• pH tolerance/spec: Not specified for this item; refer to CoA/Spec Sheet.

Best practices

• Always verify lot-specific performance characteristics (e.g., growth promotion tests) via the CoA.
• If using for regulated methods or critical QC, perform an in-house qualification (growth promotion with relevant organisms) before routine use.

Reaction and Applications

Chemical reaction applications

• Not typically applicable. Peptone Water is a biological medium and is not used as a reagent or solvent in synthetic organic reactions.

Laboratory applications in life sciences (literature)

• Pre-enrichment: Provides minimal nutrients that help resuscitate sublethally stressed bacteria prior to selective enrichment.
• Diluent: Commonly used for sample homogenization and serial dilutions in microbial enumeration to reduce physiological shock compared to pure water.
• Rinse/transport: Serves as a neutral diluent for swab rinses and short-term holding of test portions.
• Growth promotion testing: Suitable as a base to evaluate performance of more selective media when supplemented.

Practical tips (general)

• Aseptic technique: Use sterile vessels and tools to prevent background contamination.
• Sterilization (literature): Autoclave at 121 °C for 15–20 minutes if the product is supplied as non-sterile powder/solution; allow to cool to handling temperature before inoculation.
• pH adjustment: Adjust with sterile 1 N HCl/NaOH if needed (literature); verify final pH at working temperature.
• Quality checks: Perform growth promotion tests with representative organisms when required by your method or QA plan.

Reaction Conditions

Not applicable to chemical synthesis.

Microbiological use conditions (literature, general)

• Reconstitution: Dissolve the appropriate mass of peptone water formulation in purified water with gentle stirring until clear.
• Sterilization: Autoclave at 121 °C for 15–20 minutes. Allow to cool to 45–50 °C before dispensing if pouring or adding heat-labile supplements (literature guidance).
• Incubation: As a non-selective medium, typical incubation of inoculated broths occurs at 30–37 °C depending on organism and method requirements (literature). Exact temperatures/times should follow your SOP or compendial method.
• pH: Adjust to near neutrality prior to sterilization; verify pH after cooling (literature).

Item-specific parameters (pH spec, fill volume, sterility): Not specified for this item; refer to CoA/Spec Sheet.

Safety and Handling

Item-specific facts (from Product Data)

• GHS Classification, Signal Word, H-Statements, Pictograms: Not specified for this item; refer to SDS.

General safety guidance (literature/typical for nutrient media)

• Primary hazards: The unused product is generally considered of low chemical hazard; however, handle as a laboratory chemical. Once inoculated, it becomes a potential biohazard—treat cultures and waste according to institutional biosafety protocols.
• PPE: Laboratory coat, gloves (nitrile), and safety glasses as minimum. Use dust mask/respirator as appropriate if handling dry powder to avoid inhalation of particulates (literature practice).
• Handling: Avoid generating dust (for powders). Prevent contamination of containers to maintain medium quality. Use aseptic technique for sterile work.
• Storage incompatibilities: Keep away from strong oxidizers and moisture if supplied as dry powder. For prepared solutions, avoid prolonged exposure to elevated temperatures that may induce degradation or browning of peptides (literature).
• First aid (overview): If inhaled, move to fresh air; if on skin or eyes, rinse with water; if ingested, rinse mouth with water. Seek medical attention per institutional policies. Defer to SDS for authoritative instructions.
• Sterilization: Typical sterilization is by autoclaving at 121 °C for 15–20 min (literature); verify that your specific format is autoclavable and not pre-sterilized before autoclaving.
• Waste: Autoclave or disinfect used media prior to disposal; follow local regulations.

Solvent Selection

Applicability

• Peptone Water is itself an aqueous medium rather than a solute requiring solvent selection. Traditional solvent selection frameworks (polarity, logP) are not directly applicable.

General guidance (literature)

• Base medium: Water (purified/distilled/DI) is the solvent. Use high-purity water (e.g., ASTM Type 1 or 2) to minimize inhibitory ions and organics.
• Ionic balance: When NaCl is part of the formulation, the medium maintains osmotic balance for many non-fastidious bacteria.
• Additives: If supplemented (e.g., carbohydrates, indicators), ensure compatibility and consider sterilization route (autoclave vs. filtration) to prevent decomposition of heat-labile components.

When to choose Peptone Water vs. alternatives (literature)

• Choose Peptone Water for non-selective pre-enrichment, serial dilutions, and rinsing steps in microbiology workflows where a minimal nutrient background is desired.
• Alternatives include Buffered Peptone Water (enhanced buffering capacity for stress-recovery), Phosphate-Buffered Saline (non-nutritive diluent), or Ringer’s solution (osmotic support with minimal nutrients). Selection depends on whether slight nutrient content (recovery) or strictly inert diluent is preferred.

Storage and Reconstitution

Item-specific facts (from Product Data)

• Storage Conditions: Room temperature.
• Shipped In: Normal.

General guidance (literature; not item-specific)

• Dry powder (if applicable): Store tightly closed in a cool, dry place at room temperature. Protect from moisture and microbial contamination. Desiccate if humidity is high.
• Ready-to-use solution (if applicable): Store as directed on label; many non-selective broths are stored at room temperature or 2–8 °C depending on sterility and preservatives. Avoid freezing unless specified.
• Shelf life: Not specified for this item; refer to CoA/Spec Sheet.

Reconstitution/Preparation (literature example)

• Dissolve the recommended mass (e.g., peptone and NaCl per liter) in purified water with gentle stirring. Adjust pH to ~7.2 at 25 °C if required. Sterilize by autoclaving at 121 °C for 15–20 min. After cooling, store sterile medium protected from light and contamination.

Working aliquots

• Prepare single-use or small aliquots to minimize repeated heating and contamination. Label with preparation date, batch/lot, and pH.

Freeze–thaw guidance

• Not typically frozen; repeated freeze–thaw of prepared solutions is discouraged due to potential precipitation and quality loss.

Always consult the product’s CoA/Spec Sheet and SDS for lot-specific storage limits and handling.

Structure and Identity

Item-specific facts (from Product Data)

• Product: Peptone Water (SKU: P1523294)
• Grade/Purity: BioReagent
• CAS: Not specified for this item; refer to CoA/Spec Sheet.
• Molecular Formula: Not specified for this item; refer to CoA/Spec Sheet.
• Molecular Weight: Not specified for this item; refer to CoA/Spec Sheet.
• InChIKey / SMILES: Not applicable — Peptone Water is a complex mixture, not a single defined molecule.

General description (literature)

• Peptone Water is an aqueous solution containing enzymatic protein digests (peptones) and, in common formulations, sodium chloride. As a complex nutrient medium, it contains a distribution of short peptides, free amino acids, minerals, and trace growth factors.
• Structural features: The mixture comprises oligomeric peptides (amide/peptide bonds), amino acids (carboxylate/amine functional groups), and inorganic ions (e.g., Na+, Cl− when present). There is no single 2D molecular structure; rather, it is a heterogeneous ensemble of low–molecular-weight peptides dissolved in water.
• Typical uses (context): Employed as a non-selective diluent and pre-enrichment medium in microbiological workflows, quality control, and general laboratory cultivation of non-fastidious microorganisms (literature).

Synthetic Utility

Not typically applicable.

Explanation (general)

• Peptone Water is a complex biological medium and is not employed as a reagent, catalyst, or solvent in chemical synthesis. It lacks defined functional groups at fixed concentrations, and its heterogeneous composition can interfere with controlled chemical reactions.

If interfacing with chemistry workflows (literature)

• Extraction/removal: When organisms are cultured in Peptone Water prior to metabolite extraction, organic solvents (e.g., ethyl acetate, methanol) may be used to isolate small molecules from the aqueous matrix after quenching and cell removal.
• Analytical prep: Salts and peptides can cause ion suppression in LC–MS; desalting or SPE cleanup is recommended before analysis.

For synthetic transformations, refer to pure solvents and defined reagents better suited to reproducibility and mechanistic control.

Target Specificity

Not applicable.

Explanation

• This product is not an antibody, probe, or affinity reagent. It is a non-selective nutrient medium that does not possess molecular target specificity.

Item-specific immunochemical attributes: Not applicable and not specified.