Solutions are used in practically every lab, for a broad range of processes.  Lab Procurement Services carries an extensive collection of products to handle our customers' diverse requirements, including various titrimetric and other wet methods.  Please be sure to visit our pH Buffers category for all of your electrochemistry calibration needs, and our Beakers and Flasks collections to view our offerings of those essential items.

For pH buffers, check the pH value and the temperature it is stated at (most here are specified at 25 °C), the tolerance, and whether the lot is traceable to a reference standard if your quality system requires it. Color-coded buffers, such as red for pH 4, yellow for pH 7 and blue for pH 10, help avoid mix-ups during calibration. Sizes run from 500 mL bottles to 4 L bottles and 10 L and 20 L Cubitainers, so buy a size you will use before the expiration date. Electrode storage solution, offered in several sizes, keeps pH electrodes ready between uses.

Buffers and Solutions: common questions

What is 1,10-phenanthroline used for?

1,10-Phenanthroline is an organic compound that forms an intensely colored orange-red complex with ferrous iron, which is the basis of a common colorimetric method for measuring iron in water and other samples. The iron complex, known as ferroin, is also used as a redox indicator in titrations. It is sold as the monohydrate or anhydrous form, so check which one your method calls for.

How long do pH buffer solutions last once opened?

An unopened buffer is good until the manufacturer's expiration date. Once opened, buffers can change as they absorb carbon dioxide from the air or become contaminated, and alkaline buffers such as pH 10 are affected most. Pour what you need into a clean container, never return used buffer to the bottle, keep it capped, and replace it if calibration results drift.

What is the difference between a buffer and a reagent?

A buffer is a solution that resists changes in pH when small amounts of acid or base are added, usually a weak acid or base mixed with its salt. A reagent is any substance used to cause or measure a chemical reaction. Buffers are a kind of reagent used to hold pH steady in analyses, biological work and instrument calibration.

Buffers and Solutions

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  1. Sulfuric Acid, 3 N, 20.00 L Cubitainer
    Manufacturer: Reagents Inc
    Sulfuric Acid, 3 N, 20.00 L Cubitainer (1 per EA )
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    was $280.00 Special Price $215.41
  2. TSPP 5% Solution, 20.00 L Cubitainer
    Manufacturer: Reagents Inc
    TSPP 5% Solution, 20.00 L Cubitainer (1 per EA )
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    was $171.00 Special Price $131.55
  3. Formaldehyde, 37 Percent, Solution, 200L, CAS# 50-00-0
    Manufacturer: Spectrum Chemical
    Formaldehyde, 37 Percent, Solution is also known as methanal and is the simplest aldehyde. It has many uses, one of which is formol, the famous embalming and tissue preserving liquid. It is also used in industrial application for the production of different types of resins. It is also a well known tissue fixative and was formerly a disinfectant.

    (1 per EA )
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    $2,754.25
  4. Titration Solvent for Neut No, 20.00 L Met Can Rnd
    Manufacturer: Reagents Inc
    Titration Solvent for Neut No, 20.00 L Met Can Rnd (1 per EA )
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    was $599.00 Special Price $460.82
  5. Phosphate Buffer, pH 7 (Amp), 20.00 L Cubitainer
    Manufacturer: Reagents Inc
    Phosphate Buffer, pH 7 (Amp), 20.00 L Cubitainer (1 per EA )
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    was $1,030.00 Special Price $792.40
  6. Copper Sulfate, 2% w/v, 4.00 L Cubitainer
    Manufacturer: Reagents Inc
    Copper Sulfate, 2% w/v, 4.00 L Cubitainer (1 per EA )
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    was $88.50 Special Price $68.09
  7. Water Hardness Buffer, 20.00 L Cubitainer
    Manufacturer: Reagents Inc
    Water Hardness Buffer, 20.00 L Cubitainer (1 per EA )
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    was $485.00 Special Price $373.12
  8. Iodine 0.1 N, 2.50 L Glass amber
    Manufacturer: Reagents Inc
    Iodine 0.1 N, 2.50 L Glass amber (1 per EA )
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    was $130.00 Special Price $100.01
  9. Boron Trifluoride, 14 Percent in Methanol, 100mL, CAS# 373-57-9
    Manufacturer: Spectrum Chemical
    Boron Trifluoride, 14 Percent in Methanol is used as a reagent in organic chemistry most often as a Lewis acid. It is known to be a versatile building block in several other boron compounds. Ungraded products supplied by Spectrum are indicative of a grade suitable for general industrial use or research purposes and typically are not suitable for human consumption or therapeutic use.

    (1 per EA )
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    $282.05
  10. Sodium Hydroxide, 30 Percent (w/v) Solution, 20L, CAS# 1310-73-2
    Manufacturer: Spectrum Chemical
    Sodium Hydroxide, 30 Percent (w/v) Solution - Ungraded products supplied by Spectrum are indicative of a grade suitable for general industrial use or research purposes and typically are not suitable for human consumption or therapeutic use.

    (1 per EA )
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    $295.60
  11. Electrode Storage Solution pH4, 500.00 mL Poly natural
    Manufacturer: Reagents Inc
    Electrode Storage Solution pH4, 500.00 mL Poly natural (1 per EA )
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    was $43.00 Special Price $31.50
  12. TFA/Methylene Chloride, 25/75, 2.50 L Glass clear
    Manufacturer: Reagents Inc
    TFA/Methylene Chloride, 25/75, 2.50 L Glass clear (1 per EA )
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    was $515.00 Special Price $396.20
  13. Tetrabutylamm Hydroxide, 0.1 N, 1.00 L Glass amber
    Manufacturer: Reagents Inc
    Tetrabutylamm Hydroxide, 0.1 N, 1.00 L Glass amber (1 per EA )
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    was $740.00 Special Price $569.29
  14. TMAH 5% in Methanol, 1.00 L Glass amber
    Manufacturer: Reagents Inc
    TMAH 5% in Methanol, 1.00 L Glass amber (1 per EA )
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    was $372.00 Special Price $286.18
  15. Hydrochloric Acid, 0.1% v/v, 500.00 mL Poly natural
    Manufacturer: Reagents Inc
    Hydrochloric Acid, 0.1% v/v, 500.00 mL Poly natural (1 per EA )
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    was $19.50 Special Price $15.12
  16. Boron Trifluoride, 14 Percent in Methanol, 250mL, CAS# 373-57-9
    Manufacturer: Spectrum Chemical
    Boron Trifluoride, 14 Percent in Methanol is used as a reagent in organic chemistry most often as a Lewis acid. It is known to be a versatile building block in several other boron compounds. Ungraded products supplied by Spectrum are indicative of a grade suitable for general industrial use or research purposes and typically are not suitable for human consumption or therapeutic use.

    (1 per EA )
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    $382.40
  17. Boron Trifluoride, 14 Percent in Methanol, 500mL, CAS# 373-57-9
    Manufacturer: Spectrum Chemical
    Boron Trifluoride, 14 Percent in Methanol is used as a reagent in organic chemistry most often as a Lewis acid. It is known to be a versatile building block in several other boron compounds. Ungraded products supplied by Spectrum are indicative of a grade suitable for general industrial use or research purposes and typically are not suitable for human consumption or therapeutic use.

    (1 per EA )
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    $577.50
  18. Dodecyltrimethylammonium Chloride, 50 Percent Solution in Alcohol, High Purity, 200L, CAS# 112-00-5
    Manufacturer: Spectrum Chemical
    Dodecyltrimethylammonium Chloride, 50 Percent Solution in Alcohol, High Purity is a quaternary ammonium compound (QAC) commonly used as a cationic surfactant. The High Purity grade denotes that this chemical is the highest quality commercially available. Spectrum Chemical manufactured High Purity grade products meet the toughest regulatory standards for quality and purity.

    (1 per EA )
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    $7,704.15
  19. Electrode Storage Solution pH4, 1.00 L Poly natural
    Manufacturer: Reagents Inc
    Electrode Storage Solution pH4, 1.00 L Poly natural (1 per EA )
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    was $62.00 Special Price $45.15
  20. 55 Gallon Yellow Buffer Solution pH 7.0 @ 25°C
    Manufacturer: Midland Scientific
    55 Gallon Yellow Buffer Solution pH 7.0 @ 25°C (1 per EA )
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    was $2,276.45 Special Price $906.98
  21. Buffer Solution for Aluminum, 1.00 L Poly natural
    Manufacturer: Reagents Inc
    Buffer Solution for Aluminum, 1.00 L Poly natural (1 per EA )
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    was $57.50 Special Price $43.20
  22. Buffer, pH 11.00, 1.00 L Poly natural
    Manufacturer: Reagents Inc
    Buffer, pH 11.00, 1.00 L Poly natural (1 per EA )
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    was $49.00 Special Price $36.72
  23. Sulfuric Acid, 72% w/w, 1.00 L Poly natural
    Manufacturer: Reagents Inc
    Sulfuric Acid, 72% w/w, 1.00 L Poly natural (1 per EA )
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    was $93.00 Special Price $70.20
  24. Potassium Hydroxide, 0.5 N Solution in Ethanol, 1L, CAS# 1310-58-3
    Manufacturer: Spectrum Chemical
    Potassium Hydroxide, 0.5 N Solution in Ethanol - Spectrum solutions utilize the highest quality raw materials appropriate to your product. Most raw materials meet or exceed the specifications established by the American Chemical Society. Where appropriate, many finished products are traceable to NIST Standard Reference Materials. Manufacturing, quality control testing, and packaging are all performed in Spectrum’s own facilities. Record keeping and sample retention of all produced lots ensure product consistency and complete traceability.

    (1 per EA )
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    was $111.05 Special Price $90.36
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