Buffers

High-Quality Biological Buffers

MIDSCI™ offers a comprehensive selection of biological buffers and pH buffer solutions designed to maintain stable and precise pH levels across laboratory, pharmaceutical, environmental, and industrial applications. With options spanning a wide range, users can easily find the right solution for everything from routine experiments to advanced method development.

Each MIDSCI™ buffer is supported by NIST traceable calibration standards, detailed safety data sheets, and clearly labeled SKU information to ensure full traceability and compliance. Built for accuracy and ease of use, our products feature documented shelf life, expiration tracking, and compatibility with a variety of laboratory instruments and reagents.

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PR1MA™  Sodium Phosphate Dibasic, Anhydrous

CAS Number: 7558-79-4
Molecular Weight: 142.0
Chemical Formula: Na2HPO4
Solubility: Water
Storage Temp: Room Temperature

Research or further manufacturing use only, not for food or drug use.

  • Appearance: White Crystal
  • Assay: ≥ 99.0 %
  • Chloride (Cl): ≤ 0.002 %
  • Heavy Metals : ≤ 10 ppm
  • Insoluble Matter: ≤ 0.01 %
  • Iron: ≤ 0.002 %
  • Loss on Drying: ≤ 0.2 %
  • pH (5% Solution): 8.7 - 9.3
  • Sulfate: ≤ 0.005 %
  • Aerobic Plate Count: ≤ 1000 CFU/g
  • Yeast and Mold : ≤ 100 cfu/g
  • Total Coliforms: Negative

  

[N-(2-Hydroxyethyl)piperazine-N'-(3-propane sulfonic acid)] [Epps]

PR1MA™ HEPPS [N-(2-Hydroxyethyl)piperazine-N'-(3-propane sulfonic acid)] [EPPS]

Common Name: HEPPS [N-(2-Hydroxyethyl)piperazine-N'-(3-propane sulfonic acid)] [EPPS]
CAS Number: 16052-06-5
Molecular Weight: 252.3
Chemical Formula: C9H20N2O4S
Solubility: Water
Storage Temp: Room Temperature

Research or further manufacturing use only, not for food or drug use.

  • Appearance: White Crystalline Powder
  • Assay (Titration, dried basis): ≥ 99.0 %
  • Loss on Drying: ≤ 1.0 %
  • pH (1mol/L in Water @ 20 oC: 5.0 - 7.0
  • Solubility (0.1M in water): Clear and Colorless
  

PR1MA™ PBS [Phosphate Buffered Saline], 10X Powder Concentrate, White Granular Powder

CAS Number: 7778-77-0; 7447-40-7; 7558-79-4; 7647-14-5
Storage Temp: Room Temperature

Research or further manufacturing use only, not for food or drug use.

  • Appearance: White Uniform Powder (No Granular)
  • Chloride: 0.136 - 0.144 moles/liter
  • Conductivity @ 25 oC: 14000 - 17800 µomhos/cm
  • DNase, RNase, protease: Not Detected
  • pH (10X Solution): 6.7 - 6.9
  • pH (1 X Solution): 7.3 - 7.5
  • Solubility: Pass Test (9.89%)
  • Seal Integrity Testing: Pass Test

Proudly made in the USA! Click here for more made in America products!

PR1MA™  Sodium Phosphate Dibasic, Anhydrous, ACS Grade

CAS Number: 7558-79-4
Molecular Weight: 142.0
Chemical Formula: Na2HPO4
Solubility: Water
Storage Temp: Room Temperature

Research or further manufacturing use only, not for food or drug use.

  • Appearance: White crystals
  • Assay: ≥ 99.0 %
  • Chloride: ≤ 0.002 %
  • Heavy Metals : ≤ 10 ppm
  • Insoluble Matter: ≤ 0.01 %
  • Iron: ≤ 0.002 %
  • Loss on Drying: ≤ 0.2 %
  • pH (5% Solution): 8.7 - 9.3
  • Sulfate: ≤ 0.005 %
  • Yeast and Mold Count: ≤ 100 CFU/g
  • Aerobic Plate Count: ≤ 1000 CFU/g

Proudly made in the USA! Click here for more made in America products!

PR1MA™ Citric Acid Anhydrous

CAS Number: 77-92-9
Molecular Weight: 192.1
Chemical Formula: C6H8O7
Solubility: Water
Storage Temp: Room Temperature

Research or further manufacturing use only, not for food or drug use.

  • Appearance: Fine white crystalline powder
  • Assay (Titration): ≥ 99.5 %
  • Carbonizable Substances (H2SO4): Pass Test
  • Clarity and Color: Pass Test
  • Identification: Pass Test
  • Lead : ≤ 0.5 mg/kg
  • Limit of Oxalic Acid: ≤ 0.036 %
  • Oxalate Test: Pass Test
  • Residual Solvents: Meet requirements
  • Residue on Ignition: ≤ 0.05 %
  • Sulfate: ≤ 0.015 %
  • Water: ≤ 0.5 %

Proudly made in the USA! Click here for more made in America products!  

[Phosphate Buffered Saline 1X Sterile Solution]

PR1MA™  PBS 1X Solution [Phosphate Buffered Saline 1X Sterile Solution]

Common Name: Phosphate Buffered Saline 1X Sterile Solution
CAS Number: 7647-14-5, 7447-40-7, 7558-79-4, 7778-77-0, 7732-18-5
Solubility: Water
Storage Temp: Room Temperature

Phosphate Buffered Saline is a buffer solution commonly used in biological research. PBS has many uses because it is isotonic and non-toxic to most cells. These uses include substance dilution and cell container rinsing.

Ready to use sterile 1X solution.

Ingredients:

  • Sodium Chloride: 137 mM
  • Potassium Chloride: 2.7 mM
  • Phosphate Buffer: 11.9 mM
  • pH: 7.4
  • Does not contain Calcium or Magnesium

Research or further manufacturing use only, not for food or drug use.

  • Appearance: Clear and Colorless Solution
  • pH: 7.25 - 7.55

Proudly made in the USA! Click here for more made in America products!


PR1MA™  TAE 10X Solution [TRIS Acetate EDTA 10X Solution]

Common Name: TRIS Acetate EDTA 10X Solution
CAS Number: 77-86-1, 64-19-7, 6381-92-6, 7732-18-5
Solubility: Water
Storage Temp: Room Temperature

10X solution contains:

  • TRIS-Base: 0.4 M
  • Acetic Acid: 0.2 M
  • EDTA: 10 mM
  • pH (10X Solution (@25°C): 8.2-8.4
Research or further manufacturing use only, not for food or drug use.

  • Appearance: Clear, Colorless Solution
  • pH: 7.8 - 8.2

Proudly made in the USA! Click here for more made in America products!

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