The best 100 mM phosphate buffers are those that offer reliable pH stability, sterile or ready-to-use formats, and clear composition for reproducible experiments. This guide highlights five practical options, suitable for cell culture, washing steps, and general laboratory workflows. The listed products favor researchers needing consistent buffers, with selectivity for sterile filtration, ready-to-use dilutions, or convenient powders.*
Buyers: see who each product is best for and why below. A quick summary table follows to compare key features at a glance.
| Product | Best For | Format | Key Note |
|---|---|---|---|
| CryoKing Phosphate Buffered Saline 10X, 500ml PBS Buffer | Cell biology workflows needing ready-to-dilute PBS | 10× concentrate | pH 7.4 after dilution; includes 1370 mM NaCl, 27 mM KCl, 100 mM Na2HPO4·12H2O |
| CryoKing Phosphate Buffered Saline 10X, PBS Buffer 0.1um Filtration, 1000ml | Sterile cell culture prep with filtration | 10× concentrate, 0.1 μm filtered | pH 7.4±0.1; low endotoxin packaging |
| CryoKing PBS 10X Premixed Powder, 1 L / Bag | Cost-effective, ready-to-dissolve PBS for large runs | Powder, individually packaged | Dissolves to 1 L PBS; 7.4 pH ±0.2 |
| Lab-Grade Phosphate Buffer, 0.1M, 1L | Isotonic buffer for general lab use | Liquid, 1 L bottle | Comes as a lab-grade buffer; isotonic suitability |
| CryoKing PBS 10X, 1000ml / Bottle (6 Bottle Case) | Bulk lab use; straightforward dilution for many experiments | 10× concentrate | pH 7.4±0.1; 0.1 μm filtration variant available |
CryoKing Phosphate Buffered Saline 10X, 500ml PBS Buffer
This 10× concentrate provides a defined chemical composition with 1370 mM NaCl, 27 mM KCl, 100 mM Na2HPO4·12H2O, and 18 mM KH2PO4, enabling straightforward preparation of 1× PBS. Best for researchers who need a robust, ready-to-dilute buffer for routine washing, dilution, or reagent preparation in molecular biology workflows. It contains no added calcium or magnesium, supporting controlled experimental conditions.
Best for: labs that prefer a higher concentration buffer that can be diluted on demand to a precise 1× PBS. Limitations: ensure correct dilution to avoid osmolarity shifts in sensitive assays.
CryoKing Phosphate Buffered Saline 10X, PBS Buffer 0.1um Filtration, 7.4pH, Sterilize, 10X Concentrate
This 10× PBS option is sterilized through a 0.1 μm filtration, providing a sterile pathway for cell culture workflows. The pH is tightly controlled at 7.4 ± 0.1, supporting consistent washing, dissociation, or dilution steps. Its single-bottle packaging minimizes air exposure, contributing to purity in sensitive experiments.
Best for: researchers requiring sterile PBS with low endotoxin risk. Limitations: dilution accuracy is essential to maintain intended osmolality after mixing.
CryoKing Phosphate Buffered Saline 10X, PBS Premixed Powder 1L
The PBS powder is designed for easy, cost-effective preparation. Each packet dissolves to 1 L of PBS with a pH around 7.4 ± 0.2. It is widely used as a rinse/diluent for cells or tissues, a base buffer in various assays, and a cleaning solution for lab tools. The powder format is ideal for bulk labs or facilities that prefer portioned, long-lasting stock.
Best for: labs that need scalable PBS preparation with minimal ongoing handling. Limitation: ensure complete dissolution for consistent pH and osmolarity.
Lab-Grade Phosphate Buffer, 0.1M, 1L
This 1 L bottle offers a straightforward, lab-grade phosphate buffer suitable for general laboratory and research use. It can serve as an isotonic buffer in routine experiments and is compatible with many standard molecular biology workflows. The product emphasizes its suitability for isotonic conditions and standard buffer applications.
Best for: general lab use where a reliable buffering agent is needed without specialized filtration or premixed formats. Limitation: verify final pH after any buffer dilution to maintain experimental consistency.
CryoKing Phosphate Buffered Saline 10X, 1000ml PBS Buffer
This 10× PBS option mirrors the 500 ml variant but comes in a 1000 ml bottle, designed for bulk use in laboratories with higher throughput. It provides the same pH stability (7.4 ± 0.1) and the same filtration and purity considerations as the smaller bottle. Choose this for extended runs or shared core facilities.
Best for: high-volume labs that need a consistent PBS stock with straightforward dilution. Caution: maintain proper dilution hygiene to preserve sterility in workflows.
Buying Guide
- Format and workflow: Choose between premixed liquids, 10× concentrates, or powders depending on your throughput and storage capabilities. Premixed options save time; concentrates reduce packaging and shipping weight; powders lower long-term cost per liter.
- pH stability and osmolality: Look for buffers with pH 7.4 ± 0.1 and clearly stated osmolarity, especially for cell culture and washing steps, to minimize cell stress.
- Sterility and endotoxins: If sterile workflows are required, filtration-grade PBS (0.1 μm) or pre-sterilized options help reduce contamination risk.
- Purity and additives: Avoid buffers with added calcium or magnesium when not needed. For sensitive assays, verify endotoxin levels and packaging integrity.
- Cost efficiency: Powder formats offer bulk cost savings; 10× concentrates balance storage, shelf life, and ease of use.
- Compatibility: Confirm compatibility with downstream applications like Western blot, immunofluorescence, or cell culture to ensure buffering conditions suit your protocol.
FAQ
- What does 100 mM refer to in these buffers?
It indicates the molar concentration of phosphate species in the buffer, contributing to the buffer’s capacity to resist pH changes during experiments.
- Which format is best for cell culture labs?
Sterile, filtered PBS or premixed 10× PBS that is diluted to 1× is typically preferred for consistent cell handling.
- Are 10× PBS concentrates suitable for all applications?
Yes, but precise dilution to 1× is essential to maintain intended osmolarity and pH for each workflow.
- What should I consider when choosing a powder PBS?
Consider dissolution ease, packaging stability, and the ability to scale manufacturing for large experiments.
- Is isotonic buffer important for all experiments?
Not always; isotonic buffers help maintain cell viability in washing and handling steps, but some assays may require non-isotonic conditions.
- Do these buffers contain calcium or magnesium?
Most listed PBS products omit calcium and magnesium to avoid affecting certain enzyme activities and cell behaviors.