Description
Single-Bottle Chromogenic HRP Substrate (TMB)
Single-Bottle Chromogenic HRP Substrate (TMB) is a premium ready-to-use tetramethylbenzidine (TMB) substrate specifically formulated for sensitive horseradish peroxidase (HRP) detection in ELISA assays, immunoassays, diagnostic platforms, and general biochemical workflows. Designed for convenience, consistency, and reproducible chromogenic performance, this substrate delivers strong color development and dependable assay sensitivity while eliminating the need for multi-component mixing or preparation.
At Michigan Diagnostics LLC, we manufacture premium-grade Single-Bottle Chromogenic HRP Substrate (TMB) for research laboratories, diagnostic manufacturers, biotechnology companies, and assay developers requiring dependable HRP detection reagents. Each batch is produced under strict quality control standards and supplied with a Certificate of Analysis (COA), ensuring consistent performance and reliable lot-to-lot reproducibility.
What is Single-Bottle Chromogenic HRP Substrate (TMB)?
Single-Bottle Chromogenic HRP Substrate is a ready-to-use tetramethylbenzidine-based detection reagent developed for use with horseradish peroxidase-conjugated antibodies, probes, and enzyme detection systems. When exposed to HRP enzyme in the presence of hydrogen peroxide, the substrate undergoes oxidation and produces a visible blue color (read at 370 nm or 652 nm). Addition of an acid stop solution converts the blue color to a stable yellow endpoint, read at 450 nm for spectrophotometric quantification.
This chromogenic reaction makes TMB one of the most widely used substrates for:
- ELISA assays (sandwich, direct, indirect, competitive)
- Colorimetric immunoassays
- Diagnostic testing platforms
- Biomarker detection and quantification
- Antigen/antibody quantification
- Research assay development and optimization
Its single-bottle formulation simplifies workflow preparation and minimizes preparation error, making it ideal for routine laboratory and manufacturing use.
Technical Specifications
| Parameter | Value |
|---|---|
| Detection Method | Colorimetric (Chromogenic) |
| Compatible Enzyme | Horseradish Peroxidase (HRP) |
| Substrate Type | Tetramethylbenzidine (TMB) |
| Format | Ready-to-use, single-bottle |
| Volume | 1000 mL |
| Absorbance – Reaction (blue) | 370 nm / 652 nm |
| Absorbance – After Acid Stop (yellow) | 450 nm |
| Stop Solution Compatibility | 1N H₂SO₄ or 2M H₂SO₄ (color shifts to yellow, read at 450 nm) |
| Applications | ELISA, Colorimetric Immunoassays, HRP Detection Systems |
| Storage | 2–8°C, protected from light |
| Shelf Life | 12 months from date of manufacture |
| Quality Documentation | Certificate of Analysis (COA) included with every lot |
| Regulatory | Manufactured in the USA under strict QC standards |
How to Use TMB HRP Substrate — Protocol
Single-Bottle Chromogenic HRP Substrate (TMB) is supplied ready to use with no mixing required. Follow this general protocol for ELISA microwell applications:
- Equilibrate to room temperature. Remove substrate from storage (2–8°C) and allow to equilibrate to room temperature (20–25°C) for 15–30 minutes before use.
- Block and wash. Complete standard ELISA blocking and washing steps before adding substrate.
- Add substrate. Dispense 100 µL of TMB substrate per well. Avoid exposure to direct light.
- Incubate. Incubate at room temperature for 10–30 minutes. Monitor color development (blue).
- Stop the reaction. Add 50–100 µL of stop solution (1N or 2M H₂SO₄) per well. The color will shift from blue to yellow.
- Read absorbance. Read the plate at 450 nm within 30 minutes of stopping the reaction. Use a reference wavelength of 570 nm or 630 nm if available to correct for plate imperfections.
Note: TMB substrate should be colorless to very light yellow prior to use. Discard any substrate that has turned blue or green, as this indicates oxidation. Dilution of the substrate is not recommended; to reduce signal intensity, dilute the antibody or conjugate instead.
Key Product Features
- Detection Type: Chromogenic / Colorimetric
- Compatible Enzyme: Horseradish Peroxidase (HRP)
- Substrate Type: Tetramethylbenzidine (TMB)
- Format: Ready-to-use single bottle — no mixing required
- Volume: 1000 mL
- Application: ELISA, colorimetric immunoassays, HRP detection systems
Applications in ELISA Assays
Single-Bottle Chromogenic HRP Substrate (TMB) is widely used in ELISA workflows where strong and reproducible color development is required. Applications include:
- Sandwich ELISA assays
- Direct ELISA assays
- Indirect ELISA assays
- Competitive ELISA assays
- Quantitative biomarker measurement
Its dependable color development supports accurate absorbance measurement and assay reproducibility.
Applications in Diagnostic Testing
This TMB substrate is highly effective in clinical and diagnostic assay systems utilizing HRP-labeled reagents. Applications include:
- Infectious disease diagnostics
- Hormone detection assays
- Cancer biomarker testing
- Autoimmune disorder testing
- Clinical laboratory diagnostics
Its stable formulation supports regulated diagnostic and clinical workflows.
Applications in Research and Biotechnology
Single-Bottle TMB substrate is also commonly used in research and biotech development environments. Applications include:
- Assay development and optimization
- Biomarker discovery
- Antibody validation
- Protein interaction assays
- Research screening assays
Its ready-to-use design helps streamline assay development and laboratory workflows.
Advantages Over Multi-Bottle TMB Systems
Compared to two-component or multi-bottle HRP substrate systems, Single-Bottle Chromogenic HRP Substrate offers several workflow advantages:
- No mixing required — ready to dispense directly from the bottle
- Reduced preparation time and simplified workflow
- Lower risk of preparation error and contamination
- Greater convenience for high-throughput laboratory environments
- Improved lot-to-lot reproducibility
- Simplified storage and handling
These benefits make it ideal for both routine laboratory use and manufacturing environments where consistency and efficiency are critical.
Performance and Workflow Benefits
Single-Bottle Chromogenic HRP Substrate is engineered for compatibility with modern assay systems and laboratory workflows. Performance benefits include:
- Strong and reliable blue color development during reaction
- Clean yellow endpoint after acid stop — read at 450 nm
- Stable reaction kinetics for reproducible results
- Excellent lot-to-lot consistency
- Compatible with standard microwell ELISA plate readers
- Reduced preparation and handling time vs. two-bottle systems
Why Choose Michigan Diagnostics as Your TMB HRP Substrate Supplier (USA)?
Choosing a reliable TMB HRP substrate supplier in the USA is critical for achieving dependable assay performance. Michigan Diagnostics offers:
- High-purity reagent manufacturing in the USA
- Strict batch QC testing with documented results
- COA included with every order — every lot
- Fast 2–3 day US shipping
- Technical support for assay optimization
- OEM and bulk manufacturing capabilities (from 1L to large-scale production)
- Competitive pricing — significantly lower cost than major distributors for equivalent quality
Our diagnostic reagent expertise ensures dependable product quality for research, clinical, and commercial applications. With Michigan Diagnostics, you get premium-grade TMB substrate at a fraction of the cost of major suppliers — without compromising on quality, documentation, or consistency.
Frequently Asked Questions — TMB HRP Substrate
What wavelength do you read TMB at?
During the reaction, TMB produces a blue color readable at 370 nm or 652 nm. After stopping the reaction with an acid stop solution (e.g., 1N or 2M H₂SO₄), the color shifts to yellow and is read at 450 nm. For kinetic readings, 650 nm is commonly used without stopping the reaction.
What is the difference between single-bottle and two-bottle TMB substrate systems?
Two-bottle TMB systems require mixing a TMB solution with a separate hydrogen peroxide buffer immediately before use, which introduces preparation steps, risk of error, and variability. Single-bottle TMB substrates like this product are pre-formulated and ready to use directly from the bottle — eliminating mixing, reducing prep time, and improving reproducibility.
What stop solution do I use with TMB?
The most common stop solutions for TMB are 1N sulfuric acid (H₂SO₄) or 2M H₂SO₄, which shift the color from blue to yellow for reading at 450 nm. Phosphoric acid can also be used. Avoid using HCl for endpoint ELISA as it may produce a less stable color shift.
How should TMB substrate be stored?
Store Single-Bottle Chromogenic HRP Substrate (TMB) at 2–8°C, protected from direct light. Do not freeze. Allow the substrate to equilibrate to room temperature before use. Properly stored, the shelf life is 12 months from the date of manufacture.
How long does TMB color development take?
Color development typically occurs within 10–30 minutes at room temperature, depending on the concentration of HRP in your assay. Monitor absorbance to stop the reaction at the appropriate point — do not allow OD values to exceed 2.0 before adding stop solution.
Is TMB substrate toxic?
TMB (3,3′,5,5′-tetramethylbenzidine) has replaced earlier benzidine-based substrates and is considered significantly safer. However, standard laboratory safety precautions should be followed. Refer to the product SDS for full safety information.
Can I use this TMB substrate for Western blotting?
This product is a soluble TMB formulation optimized for microwell ELISA applications. It is not recommended for membrane-based applications (Western blotting, dot blots, IHC) that require a precipitating, insoluble reaction product. For those applications, a precipitating TMB or alternative chromogenic substrate should be used.
Is bulk or OEM purchasing available?
Yes. Michigan Diagnostics offers bulk manufacturing and OEM private-label supply of TMB HRP substrate. We work with diagnostic kit manufacturers, biotech companies, and assay developers requiring consistent large-volume supply. Contact us to discuss your requirements.
Packaging and Availability
Single-Bottle Chromogenic HRP Substrate (TMB) – 1000 mL is available for:
- Research laboratories requiring large-volume, ready-to-use substrate
- Diagnostic manufacturers and IVD kit producers
- Biotechnology firms and CROs
- Pharmaceutical R&D teams
- OEM assay production and private-label supply
Custom packaging and bulk quantities are available upon request.
Order Single-Bottle Chromogenic HRP Substrate (TMB) Today
If you are looking to buy Single-Bottle Chromogenic HRP Substrate (TMB) – 1000 mL for ELISA assays, diagnostic workflows, HRP detection, or immunoassay development, Michigan Diagnostics provides dependable, high-quality solutions with fast delivery and expert technical support. Contact us today for pricing, technical specifications, or bulk ordering.
Related Resources
Not sure which HRP substrate is right for your assay? Read our guide: How to Choose an HRP Substrate for ELISA: TMB Substrate Selection Guide — covering substrate types, single-bottle vs. two-component systems, key specs to compare, troubleshooting tips, and a full protocol.
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