HRP Stabilizer

Cat. No.: H615758

Storage

Store at 2-8°C

Shipped In

Wet ice

Specifications

Storage

Store at 2-8°C

Shipped In

Wet ice

This product requires cold chain shipping. Ground and other economy services are not available.

Application Protocols

While no item-specific protocol is provided in the Product Data, the following general workflows illustrate typical uses of an HRP stabilizer. Adjust to your assay and consult the CoA/Spec Sheet for any product-specific instructions.

A. Stabilizing HRP-Conjugated Antibodies (general)

• Prepare HRP-conjugate at desired storage concentration.
• Combine with HRP Stabilizer under sterile conditions; mix gently to avoid foaming.
• Aliquot to minimize freeze–thaw; store at 2–8°C.
• Before assays, if the stabilizer contains any components that could interfere with detection chemistry, exchange into assay-compatible diluent.

B. Maintaining Working Stocks During ELISA/Western Runs (general)

• Dilute HRP-conjugate into stabilizer to the working concentration immediately prior to use.
• Keep on ice or at 2–8°C during extended runs to limit activity loss.
• Verify background by running blanks containing stabilizer alone.

C. Pre-coated Plate Preservation (general)

• After coating and blocking steps (per your SOP), add HRP Stabilizer to wells intended for storage.
• Seal and store at 2–8°C; test retained activity at defined intervals.

Note: Do not use sodium azide-containing solutions in peroxidase development steps. All parameters (ratios, times) should be optimized empirically.

Biological Roles

This product itself has no biological role; it is a laboratory excipient formulated to preserve the activity of horseradish peroxidase (HRP) enzymes and HRP-conjugates used as reporters in immunoassays.

Background (general/literature):

• HRP is a heme-containing oxidoreductase derived from Armoracia rusticana. It catalyzes the oxidation of chromogenic and chemiluminescent substrates (e.g., TMB, OPD, luminol) in the presence of hydrogen peroxide, generating measurable signals.
• HRP activity is sensitive to denaturation, proteolysis, metal-catalyzed oxidation, and surface adsorption. Stabilizers work by buffering pH near neutral, providing osmolytes/protectants (e.g., sugars, polymers), and controlling ionic strength and redox environment to maintain the native conformation and heme integrity.
• In conjugates, HRP is commonly linked to antibodies, streptavidin, or other affinity proteins; stabilizers help maintain both binding affinity and catalytic function by mitigating aggregation and active-site inactivation.

No medical/clinical claims: This product is for research use only and is not intended for diagnostic or therapeutic use.

Buffer Applications

Use context: HRP Stabilizer is intended as a storage/dilution matrix for HRP enzymes and HRP-conjugates to maintain activity and reduce nonspecific adsorption.

General guidance (optimize empirically; item-specific instructions are not provided):

• As a storage buffer: Mix HRP-conjugate with stabilizer and store at 2–8°C. Select working concentrations appropriate for your assay; avoid repeated freeze–thaw.
• For working stocks: Prepare assay-day dilutions of HRP-conjugates in stabilizer to preserve activity during extended runs and minimize adsorption to plastics.
• Pre-coated plates/membranes: After adsorption/immobilization steps, a compatible stabilizer can help preserve coated HRP reagents. Validate that the stabilizer does not increase background with your detection chemistry.

Practical notes (general/literature):

• Avoid sodium azide in any buffer contacting HRP during substrate development (e.g., TMB, luminol), as it inhibits peroxidase.
• If a chelator is present, ensure compatibility with metal-dependent assay components.
• Rinse thoroughly before substrate addition if uncertain about interactions between the stabilizer and the detection chemistry.

Because composition and any recommended dilution factors are not specified for this item, consult the CoA/Spec Sheet or perform a small pilot to define optimal conditions.

Green Alternatives

Given this is a ready-to-use HRP stabilizer, “green” considerations relate to composition, waste minimization, and workflow efficiency rather than solvent substitution.

Greener practice options (general/literature):

• Preservatives: Prefer non-mercurial, low-toxicity antimicrobial systems and avoid sodium azide when possible to reduce hazardous waste burden. Verify the actual preservative system on the CoA/Spec Sheet.
• Concentrates vs RTU: Using concentrates (if available) can reduce packaging and shipping weight. Conversely, RTU formulations can reduce preparation errors and waste from failed in-house buffer batches.
• Longevity: A stabilizer that meaningfully extends HRP conjugate shelf-life reduces reagent disposal and re-manufacturing impacts.
• Packaging: Select volumes that match usage to minimize expired waste; recycle containers where allowed.

Comparison (general):

• DIY buffers (PBS/TBS + sugar/protein) can be lower cost but may provide less robustness to thermal and oxidative stress, leading to higher waste if activity is lost.
• Commercial HRP stabilizers are optimized to protect catalytic activity and reduce background; fewer repeat assays can translate to lower overall resource use.

Trade-offs: Some antimicrobial systems complicate waste streams; weigh performance benefits against disposal requirements.

Pharmaceutical Uses

Not typically applicable. This is a research-grade laboratory reagent for stabilizing HRP enzymes and HRP-conjugates used in analytical immunoassays. It is not intended for clinical or pharmaceutical formulation use.

For completeness (general): In bioprocess analytics and quality control labs, HRP-conjugate assays may be used as research tools; stabilizers can support reagent reliability. No pharmacopeial status or excipient designation is provided for this item.

Physical Properties

Item-specific physicochemical specifications are not provided.

• Physical state/appearance: Not specified for this item; refer to CoA/Spec Sheet.
• pH: Not specified for this item; refer to CoA/Spec Sheet. (HRP-stabilizing buffers are often near neutral, literature/general.)
• Density, viscosity, refractive index: Not specified for this item; refer to CoA/Spec Sheet.
• Freezing/boiling points: Not specified for this item; refer to CoA/Spec Sheet.
• Solubility: Aqueous formulation; miscible with water (general for this class). Compatibility with organic solvents is typically limited and not recommended for HRP conjugates (literature/general).
• Osmolality/ionic strength: Not specified for this item; refer to CoA/Spec Sheet.

Handling implications (general/literature):

• HRP activity is sensitive to extreme pH, high ionic detergents, and oxidants/reductants; stabilizers mitigate these by buffering and providing protective excipients.
• Avoid repeated freeze–thaw when properties are not specified; gel formation or precipitation may indicate incompatibility or contamination.

Quality & Grades

• Grade/Purity: Not specified for this item; refer to CoA/Spec Sheet.

Context for this product type (general/literature):

• HRP stabilizers are typically manufactured under controlled conditions to ensure low bioburden and lot-to-lot consistency. Quality attributes often include sterile filtration (e.g., 0.2 µm), low particulate load, and reproducible buffering capacity. Specific assays can include HRP activity retention studies with representative HRP-conjugates over time and at elevated temperature (accelerated stability).
• UV transparency (for spectrophotometric monitoring) and low background in ELISA/Western blot are desirable characteristics for high-end formulations.
• Preservatives: Some stabilizers contain non-azide antimicrobial systems compatible with HRP assays; if present, the identity and concentration should be confirmed on the CoA, especially when HRP will contact live cells or be used with sensitive substrates.

What is specific here:

• Because item-specific grade and composition are not disclosed in the Product Data, users should consult the CoA/Spec Sheet for confirmation of sterility status, preservative system, and any performance claims (e.g., shelf-life, activity retention curves).

Reaction & Applications

Primary application: preservation of HRP enzyme activity and integrity in research assays.

Common use cases (general/literature):

• Long-term storage of HRP- or HRP-conjugated antibodies/streptavidin at 2–8°C, minimizing loss of activity, aggregation, and nonspecific adsorption to plastics.
• Stabilization of diluted working stocks to maintain consistent signal over multi-day assay runs (ELISA, Western blot, immunohistochemistry, chemiluminescent assays).
• Plate coating stabilization: After adsorbing capture antibodies/antigens, an HRP-compatible stabilizer can reduce desorption and preserve HRP-labeled detection reagents for pre-coated formats.

Practical tips (general):

• Filter-sterile technique and clean plasticware minimize bioburden. Avoid metal contamination and peroxides.
• Avoid sodium azide in any solution contacting HRP during catalysis (TMB/OPD/luminol), as azide inhibits HRP. If azide-containing stocks must be stored, thoroughly exchange buffer before assays.
• Minimize freeze–thaw cycles for HRP-conjugates; aliquot stabilized solutions.
• Validate background: Run blank wells/membranes with the stabilizer alone to ensure no increase in nonspecific signal in your detection system.

Note: No item-specific performance claims or dilution ratios are provided in the Product Data; optimize empirically for your assay.

Reaction Conditions

Not applicable in the sense of chemical reaction conditions. However, for practical use with HRP-conjugates (general/literature):

• Temperature: Store and handle at 2–8°C for stability. Avoid elevated temperatures that can accelerate HRP denaturation.
• pH: HRP is typically most stable/activity-retaining near neutral pH. Exact pH of this item is not specified; refer to CoA/Spec Sheet.
• Compatibility: Validate with intended substrates (TMB, OPD, luminol). Avoid sodium azide in solutions contacting HRP during detection.
• Time: Stabilizers are used continuously from preparation/storage through assay setup to maintain performance across hours to months, depending on workflow.

No item-specific incubation times, concentrations, or performance metrics are provided in the Product Data. Optimize empirically.

Safety & Handling

Hazard classification details have not been provided for this specific item.

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

General laboratory safety (good practice for aqueous protein-related formulations):

• PPE: Lab coat, safety glasses, and appropriate chemical-resistant gloves.
• Avoid ingestion, inhalation of aerosols, and skin/eye contact. Work with good hygiene and clean spills promptly.
• Storage incompatibilities (general/literature): Avoid strong oxidizers or reducers, heavy-metal contamination (which can catalyze HRP degradation), and microbial contamination. Do not mix with sodium azide if the conjugate will be used in peroxidase-based detection, as azide is a potent HRP inhibitor (literature/general).
• First aid overview: In case of eye/skin contact, rinse with water; if inhaled, move to fresh air; if ingested, rinse mouth. Seek medical attention if symptoms persist. Defer to SDS for authoritative instructions.
• Waste: Dispose according to institutional and local regulations for aqueous laboratory chemicals; account for any preservatives that may be present.

Always consult the product SDS for definitive hazard, handling, and emergency measures.

Solvent Selection

This product is an aqueous stabilizing formulation intended for HRP enzymes/conjugates; organic solvent selection is not typically applicable.

Useful compatibility notes (general/literature):

• Matrix: Water-based; designed to be used as supplied or mixed with aqueous HRP conjugates. Avoid dilution into organic-rich media that can denature proteins.
• Detergents: Low levels of nonionic surfactants (e.g., polysorbates, Tween-type) are sometimes compatible with HRP, but excessive detergent can reduce activity. Confirm compatibility with your assay.
• Substrates: Compatible with common peroxidase substrates used downstream (e.g., TMB, OPD, luminol) when preservative systems do not inhibit HRP. Avoid sodium azide if the conjugate will be used catalytically.
• Salts/chelators: Chelators (e.g., EDTA, literature/general) can protect against metal-catalyzed oxidation but may interfere with metal-dependent steps in certain workflows.

When to choose vs alternatives (general):

• Choose an HRP-specific stabilizer over generic protein storage buffers when long-term retention of peroxidase activity and minimal background in ELISA/WB are critical.
• Consider BSA- or protein-free versions if your application is sensitive to protein additives (e.g., biotin-streptavidin amplification systems). Verify composition on CoA/Spec Sheet.

Storage & Reconstitution

• Storage conditions (from Product Data): Store at 2–8°C.
• Shipping: Shipped on wet ice (from Product Data).
• Form/appearance: Not specified for this item; refer to CoA/Spec Sheet.
• Reconstitution: Not specified for this item. If supplied ready-to-use, employ directly. If supplied as a concentrate or lyophilizate, follow label/CoA instructions for dilution or rehydration with high-purity water or buffer.

General handling guidance (literature/general):

• Mix gently before use to ensure homogeneity; avoid excessive foaming.
• Maintain sterility to prevent microbial growth; consider sterile dispensing/aliquoting.
• Avoid repeated freeze–thaw unless the CoA explicitly supports freezing; many HRP stabilizers are intended for refrigerated storage only.
• Record first opening date and establish an in-lab expiry based on your QC checks (e.g., HRP activity retention in a control assay).

For definitive instructions on shelf-life, compatible diluents, and any preservative content, consult the product label and CoA/Spec Sheet.

Research Use: For research use only (from Product Data).

Structure & Identity

This product is a formulated reagent designed to stabilize horseradish peroxidase (HRP) enzymes and HRP-conjugates. It is not a single defined small molecule.

• Product type: HRP Stabilizer (formulated aqueous reagent)
• Molecular formula: Not specified for this item; refer to CoA/Spec Sheet.
• Molecular weight: Not specified for this item; refer to CoA/Spec Sheet.
• CAS number: Not specified for this item; refer to CoA/Spec Sheet.
• SMILES / InChI / InChIKey: Not applicable for a multi-component formulation.
• Structural features: As a mixture, no single discrete structure applies. Typical HRP stabilizers (literature/general) may contain buffering salts, protein/protective polymers or sugars (to minimize denaturation and aggregation), chelators (to limit metal-catalyzed oxidation), and antimicrobial preservatives.
• 2D description (general): Aqueous buffer matrix supporting protein stability via ionic strength control, pH buffering (commonly near neutral, literature), and inclusion of stabilizing excipients to preserve HRP catalytic activity during storage and use.

Note: Exact composition, concentrations, and excipients are proprietary/not specified for this item; consult the CoA/Spec Sheet if required.

Synthetic Utility

Not applicable as a synthetic reagent. This product is a formulated aqueous stabilizer for HRP enzymes/conjugates and does not serve as a building block, catalyst, or solvent in organic synthesis.

For users seeking related chemistry information (general): If your workflow involves preparing HRP conjugates (e.g., periodate oxidation coupling to glycoproteins, maleimide-thiol chemistry, or NHS-ester amine coupling to antibodies), employ the stabilizer post-conjugation to enhance storage stability. Ensure it lacks components incompatible with your conjugation chemistry before use.

Target Specificity

Not applicable. This product is not an antibody or affinity reagent and has no target specificity, clone, isotype, or species reactivity.

• Antigen/epitope: Not applicable.
• Species reactivity: Not applicable.
• Clone/isotype: Not applicable.

Frequently Asked Questions

How should this product be stored?

Store at 2–8 °C. Refrigerated storage is required to maintain the specified shelf life.

How is this product shipped?

This product ships chilled on wet ice. Unpack on arrival and transfer it to the storage condition stated above.

What documentation is provided?

Available product documentation, including Certificates of Analysis (COA), Safety Data Sheets (SDS), and specification sheets, is shown in the product document area. Document availability and access follow the current site policy.