When preparing buffers for molecular biology and biochemistry workflows, Tris buffers at pH 7.5 are a common choice. This article highlights five reliable 1 M Tris buffers with a target pH near 7.5, offering practical details about format, sourcing, and usage to help researchers select the right solution for their experiments.
Overview of selected products shows options in varying bottle sizes and supplier practices. The following table summarizes key attributes to compare at a glance.
| Product | Brand | Volume | pH |
|---|---|---|---|
| 1M Tris (pH7.5, 1,000 ml) | Generic | 1000 ml | 7.5 |
| Tris Buffer, pH 7.5 [1M] – 1,000 ml | eCon Lab Supply | 1000 ml | 7.5 |
| Tris-HCl Buffer, pH 7.5 [1M] – 1000 ml | eCon Lab Supply | 1000 ml | 7.5 |
| Tris Buffer, pH 7.5 [1M] – 500 ml | eCon Lab Supply | 500 ml | 7.5 |
| Tris Buffer, pH 7.5 [1M] – 250 ml | eCon Lab Supply | 250 ml | 7.5 |
1M Tris (pH7.5, 1,000 ml)
Product overview highlights a 1 M Tris solution with a stated pH of 7.5. The listing provides chemical identifiers: CAS 1185-53-1, molecular formula C4H12ClNO3, and molecular weight 157.59. This format is suitable for many standard buffer applications in molecular biology and biochemistry, particularly where reproducible buffering capacity at physiological temperatures is required.
- Concentration: 1 Molar (1 M)
- Target pH: 7.5
- Cited chemical data: CAS, formula, and molecular weight
Tris Buffer, pH 7.5 [1M] – 125 ml
![Tris Buffer, pH 7.5 [1M] - 125 ml image](https://m.media-amazon.com/images/I/31Hra4HFjcL._SL500_.jpg)
This small-volume Tris buffer is produced in facilities certified to ISO 9001 and 13485, with USA-based production and strict quality controls. It is intended for research use only and is not suitable for human or animal clinical or therapeutic applications. The product is manufactured under Good Manufacturing Practices with clean room conditions to ensure lot-to-lot consistency.
- Volume: 125 ml
- Format: 1 M Tris, pH 7.5
- Quality assurance: ISO 9001 and 13485; USA-based facility
- Intended use: Research use only
Tris-HCl Buffer, pH 7.5 [1M] – 1000 ml
The Tris-HCl buffer provides a 1 M solution with a pH target of 7.5 at typical room temperatures. The listing mirrors the supplier’s emphasis on USA-based manufacturing and compliance with good manufacturing practices. It is intended for laboratory research and educational purposes, with attention to stability and supply consistency across production lots.
- Concentration: 1 M Tris-HCl
- pH target: 7.5 (at 25°C typical)
- Storage: Stable in common refrigerated or room-temperature settings within defined ranges
Tris Buffer, pH 7.5 [1M] – 500 ml
This 500 ml Tris buffer provides the same 1 M concentration and pH 7.5 target, suitable for experiments requiring moderate buffer volumes. The product is manufactured in facilities with ISO and 13485 certifications and is intended for research use. As with similar listings, it emphasizes controlled production processes and clean room standards to ensure consistency across lots.
- Volume: 500 ml
- pH: 7.5 (1 M)
- Sourcing: USA-based facility with GMP-compliant production
Tris Buffer, pH 7.5 [1M] – 250 ml
This 250 ml option aligns with the same 1 M Tris formulation and pH target, offering a compact package for small-scale experiments, teaching labs, or pilot studies. The product emphasizes quality control and consistent GMP-compliant production in the USA, along with standard storage practices for biotechnology buffers.
- Volume: 250 ml
- pH target: 7.5; concentration: 1 M
- Intended use: Research and educational settings
Buying Guide: Key Considerations For Tris Buffers At pH 7.5
Choosing the right Tris buffer involves balancing concentration, volume, pH stability, and production quality. Researchers should consider the following factors to select the best option for their workflow.
- Concentration and buffering capacity: Most listings are 1 M Tris, which provides robust buffering over a broad pH range. For routine workflows, a 1 M stock is convenient for dilution to desired working concentrations.
- pH accuracy and temperature dependence: pH values are typically specified at 25°C. When experiments run at different temperatures, verify the target pH at your actual temperature or adjust accordingly with a calibrated pH meter.
- Chemical form: Some products are Tris base formulations (Tris) with HCl adjustments (Tris-HCl). Ensure you know the exact form and buffering chemistry you need for your protocol.
- Storage and stability: Look for buffers with storage guidance (2–30°C or refrigerated) and defined shelf-life to minimize drift in experimental results.
- Quality certifications: ISO 9001, 13485, and GMP-compliant production offer greater confidence in lot-to-lot consistency and suitability for research environments.
- Intended use: Confirm the labeling states “For research use only” or compatible educational/research purposes. Avoid use in clinical or therapeutic contexts unless explicitly approved.
- Volume and cost efficiency: Depending on project size, choose a bottle size that minimizes waste and handling while fitting your budget. Smaller volumes are convenient for frequent experiments, while larger volumes reduce reordering frequency.
Practical application notes: When preparing buffers, consider the ionic strength and presence of other components in your protocol. Tris buffering works well in many enzyme assays and nucleic acid procedures, but compatibility with downstream steps (e.g., electrophoresis, enzymatic reactions) should be validated in pilot tests.
For researchers cataloging supplies, keeping a simple record of buffer lot numbers and preparation dates improves traceability. In environments with high-throughput workflows, standardized buffer recipes help maintain reproducibility across experiments and over time.