HEPES ensures constant pH levels in culture media and other biological studies. This compound is particularly beneficial if the cells are used away from the controlled CO₂ incubator, where changes in gas composition influence the pH of the media. Nonetheless, it should be remembered that not all HEPES buffers available on the market are good for cell culture.
When choosing a supplier, it is important to identify what exactly you need in terms of your experiments: sterile liquid HEPES for media preparations, pure HEPES powder for customized solutions, or ready-made HEPES buffer for a particular biochemical reaction, etc.
Below is a list of seven companies offering HEPES products or alternative options for research and cell culture laboratories.
1. Exreprotein
Exreprotein supplies research reagents for academic laboratories, biotechnology companies, and life-science research teams. Its Instant HEPES Buffer is a premeasured powder product available in 10-pack and 50-pack options. Each packet prepares one liter of 1X working solution, helping reduce manual weighing and preparation steps.
The formulation includes 50 mM Tris, 50 mM HEPES, 2 mM EDTA, and 0.1% SDS, and its pH value is 7.7 ± 0.2 at 25°C. The buffer is designed for use in protein research, biochemistry, DNA/RNA extraction, and PCR. Due to the presence of SDS and EDTA, it is not a typical HEPES additive that can be added directly to the cell culture medium.
In terms of laboratories that require a pre-made buffer to conduct their experiments, Exreprotein comes up with a suitable solution. The product needs to be diluted with around 500 mL of either distilled or deionized water before reaching a final volume of one liter. You should check the HEPES Buffer characteristics of the product.
2. Thermo Fisher Scientific
Thermo Fisher Scientific provides HEPES via its Gibco cell culture range. The HEPES Buffer Solution from Thermo Fisher Scientific has a 1 M concentration, comes in the form of a sterile liquid, and is used for cell culture purposes. Packaging options include 20 mL and 100 mL packs, with multi-packs also available.
HEPES is described by Gibco as an extra buffer to be added to the media during cell cultures. By adding enough, usually between 10–25 mM, one can add extra buffering capacity if the cells are grown in the absence of a CO₂ incubator. pH of this product is in the range of 7.0-7.5.
Thermo Fisher Scientific is a great choice for a lab requiring HEPES for cell culture purposes. You may need to check the catalog number, the concentration, and storage conditions before purchasing the product.
3. VWR
VWR, which belongs to Avantor, is a distributor of laboratory chemicals and reagents manufactured by different brands. The company sells HEPES in powdered form, including pure HEPES suitable for biological studies. It provides laboratories with an alternative way of getting HEPES.
One listed option is HEPES free acid with a purity of at least 99%. The catalog describes it as a general-purpose biological buffer with applications that include tissue culture and other research procedures. Pack sizes can include smaller bottles and larger quantities, depending on the supplier and regional catalog.
VWR is particularly useful when your purchasing team wants to compare products from multiple manufacturers through one distributor. Check the current listing for grade, purity, pack size, and intended application. If you need sterile HEPES for cell culture media, confirm that the specific product meets that requirement.
4. R&D Systems
R&D Systems, part of Bio-Techne, offers HEPES through its Tocris Bioscience product range. Its HEPES product is described as a multipurpose buffer for cell culture and other biological research. It has a stated purity of at least 99.5% and a useful pH range of 6.8–8.2.
This product is available as a research reagent for laboratories that prepare their own buffer solutions. HEPES can provide additional buffering capacity in culture media, particularly when cells are handled outside a CO₂ incubator. It should supplement, rather than replace, the bicarbonate system in standard culture media.
R&D Systems is worth considering if you need high-purity HEPES for cell culture or related biological studies. Review the product page for its current packaging, storage guidance, and technical specifications before ordering.
5. Sigma-Aldrich
Sigma-Aldrich offers HEPES in both liquid and powder formats for laboratory research. Its HEPES solution, product H3537, is a 1 M liquid formulation with BioPerformance Certified grade and 0.2 μm filtration. The company also lists H0887, a 1 M solution with a pH range of 7.0–7.6 that is suitable for cell culture.
These prepared solutions can reduce the time needed to weigh powder and prepare buffer from scratch. Sigma-Aldrich also provides product documentation and different pack sizes, allowing laboratories to compare options based on their usage and storage needs. Check the exact product’s filtration, sterility, and quality details rather than assuming all liquid HEPES products have the same specifications.
Sigma-Aldrich is a useful option when you need a defined HEPES grade for cell culture media or other laboratory procedures. Compare the product specifications with your protocol before choosing a formulation.
6. HOPAX Fine Chemicals
HOPAX Fine Chemicals manufactures HEPES for cell culture and biochemical applications. Its cell culture-grade HEPES is supplied as a white powder with an assay of at least 99.5%. The published specifications include a useful pH range of 6.8–8.2, a passing cell culture test, and a passing cytotoxicity test.
The company offers bulk packaging, including 15 kg drums, and also provides smaller quantities. Its product information lists additional quality details, such as endotoxin limits and bioburden specifications. These details can help laboratories assess whether the material meets their quality requirements.
HOPAX may suit research facilities, manufacturers, and other users with regular or high-volume HEPES needs. You can request a certificate of analysis and review the available technical documents before placing an order.
7. Corning
Corning offers HEPES through its cell culture product range in liquid and powder formats. Its liquid option is a 1 M solution supplied in 100 mL bottles. Powder options are available in 100 g, 500 g, and 1 kg sizes. This range gives laboratories flexibility in how they prepare and use their buffer solutions.
Corning lists a recommended working concentration of 10–25 mM for its HEPES solution. The company also provides product information and quality certificates for individual production lots. These resources help researchers review product details and maintain consistent laboratory procedures.
Corning is a practical option if you need both prepared liquid HEPES and powder for in-house solution preparation. Compare the available formats, pack sizes, and storage requirements with your laboratory’s routine needs before selecting a product.
Conclusion
The right HEPES supplier depends on your application, required grade, concentration, and preferred format. Thermo Fisher Scientific, Sigma-Aldrich, HOPAX Fine Chemicals, R&D Systems, and Corning offer options specifically relevant to cell culture, while VWR provides access to products from different manufacturers. Exreprotein supplies a premeasured buffer for defined biochemical and molecular biology procedures.
Before ordering, compare each product’s technical specifications with your laboratory protocol. Pay particular attention to formulation and sterility so the selected buffer supports your intended research application.
