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

Filters
Set Descending Direction

7396 items

Page
per page
View as List Grid
  1. Phenolphthalein, 1 Percent (w/v) Indicator Solution in 95 Percent Isopropyl Alcohol
    Manufacturer: Spectrum Chemical
    Phenolphthalein, 1 Percent (w/v) Indicator Solution in 95 Percent Isopropyl Alcohol is often used as a indicator in titrations and is colorless in acidic solutions and pink in basic solutions. 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 )
    Learn More
    was $83.50 Special Price $74.12
  2. Bromocresol Purple, 0.1% w/v Solution, 1 L
    Manufacturer: 710 Spirits Rocky Mtn Reagents
    pH 5.2 (yellow) - pH 6.8 (purple) (1 per EA)
    Learn More
    $27.05
  3. Sodium Fluoride, 1 Normal, 500 mL, Poly
    Manufacturer: 710 Spirits Rocky Mtn Reagents
    Sodium Fluoride, 1 Normal, 500 mL, Poly (1 per EA )
    Learn More
    $30.05
  4. Et 740 Laboratory Floc Tester 4 Positions, Ea/1
    Manufacturer: Lovibond Tintometer Group
    The ET 740 Floc Testing unit is a bench top laboratory unit capable of analysing up to 4 samples simultaneously. The unit has a glare-free illuminated back panel for sample observation. The unit can accommodate up to four 1500 ml samples. Other features (1 per EA)
    Learn More
    $3,620.10
  5. Free Polymer Reagent #2, 16 oz
    Manufacturer: Taylor Technologies
    Free Polymer Reagent #2, 16 oz (1 per EA)
    Learn More
    was $108.47 Special Price $82.86
  6. Potassium Hydroxide 30% W/V, 1L, Poly Bottle
    Manufacturer: LabChem
    Shelf Life (months): 24, Traceable to NIST, UN Number: UN1814 (1 per EA)
    Learn More
    was $67.90 Special Price $50.92
  7. Nitric Acid 1 N, 20.00 L Cubitainer
    Manufacturer: Reagents Inc
    Nitric Acid 1 N, 20.00 L Cubitainer (1 per EA )
    Learn More
    was $337.00 Special Price $252.72
  8. Silver Nitrate, 0.0282 N, 20.00 L Cubitainer
    Manufacturer: Reagents Inc
    Silver Nitrate, 0.0282 N, 20.00 L Cubitainer (1 per EA )
    Learn More
    was $1,070.00 Special Price $802.44
  9. Sodium Hydrosulfite, 12% w/w, 200.00 L Drum
    Manufacturer: Reagents Inc
    Sodium Hydrosulfite, 12% w/w, 200.00 L Drum (1 per EA )
    Learn More
    was $879.00 Special Price $658.80
  10. Ferric Ion Solution 30, 1.00 L Poly natural
    Manufacturer: Reagents Inc
    Ferric Ion Solution 30, 1.00 L Poly natural (1 per EA )
    Learn More
    was $143.00 Special Price $106.92
  11. Triton X-100™, 2% v/v, 500.00 mL Poly natural
    Manufacturer: Reagents Inc
    Triton X-100™, 2% v/v, 500.00 mL Poly natural (1 per EA )
    Learn More
    was $85.00 Special Price $65.39
  12. Phosphate Buffer, pH 6.8 USP, 20.00 L Cubitainer
    Manufacturer: Reagents Inc
    Phosphate Buffer, pH 6.8 USP, 20.00 L Cubitainer (1 per EA )
    Learn More
    was $251.00 Special Price $187.92
  13. Ammonium Vanadate TS - 100mL
    Manufacturer: Dawn Scientific
    Ammonium Vanadate TS - 100mL (1 per EA )
    Learn More
    was $39.62 Special Price $38.63
  14. Buffer Solution, pH 2.00 +/- 0.02 @ 25 DEG C, Reference Standard, 1L, CAS# 110-65-6
    Manufacturer: Spectrum Chemical
    Buffer Solution, pH 2.00 +/- 0.02 @ 25 DEG C, Reference Standard is a mixture of weak acid and its conjugate base in order to prevent changes in the pH of a solution. Buffer solutions let you calibrate any pH tester to ensure accurate readings when measuring pH in water samples and process liquids.

    (1 per EA )
    Learn More
    was $97.75 Special Price $79.53
  15. Potassium Hydroxide, 0.1N (0.1M) In Ipa, 4L, Poly Bottle
    Manufacturer: LabChem
    Shelf Life (months): 18, Traceable to NIST, UN Number: UN1993 (1 per EA)
    Learn More
    was $164.30 Special Price $123.23
  16. Vario Mr Cod Reagent, Mercury-Free 0-1500 Mg/L; 150 Vials, Ea/1
    Manufacturer: Lovibond Tintometer Group
    Direct Replacement for Hach P/N 2565115. Lovibond VARIO MR COD Tube Tests, Hg-Free, Pack of 150 (1 per EA)
    Learn More
    $338.00
  17. Hydrogen Peroxide, 30 Percent, Solution, Reagent, 100mL, CAS# 34195-34-1
    Manufacturer: Spectrum Chemical
    Hydrogen Peroxide, 30 Percent, Solution, Reagent is the simplest peroxide, a strong oxidizer that appears as a clear and slightly viscous liquid. Its oxidizing properties are so strong that it is considered a highly reactive oxygen species. Due to it being a weak acid, it can form thermally unstable hydroperoxides. One of its biggest uses is in the treatment of drinking water, removing odors, organic materials and the amount of Hydrogen sulfides and Iron. As a Reagent grade, Spectrum Chemical manufactured Hydrogen Peroxide is a high quality chemical suitable for use in many analytical and general laboratory applications.

    (6 per CS )
    Learn More
    was $522.70 Special Price $425.31
  18. Hydrochloric Acid, 0.2 Normal, 1 L, Poly
    Manufacturer: 710 Spirits Rocky Mtn Reagents
    N/5 (0.2 M) (1 per EA)
    Learn More
    $21.45
  19. Acid-Alcohol 5% V/V, 4L, Poly Bottle
    Manufacturer: LabChem
    Shelf Life (months): 12, Traceable to NIST, UN Number: UN2924 (1 per EA)
    Learn More
    was $179.30 Special Price $134.47
  20. Villella's Reagent, 1.9% /EtOH, 2.50 L Glass sc
    Manufacturer: Reagents Inc
    Villella's Reagent, 1.9% /EtOH, 2.50 L Glass sc (1 per EA )
    Learn More
    was $628.00 Special Price $483.13
  21. Ammonium Hydroxide, 5.0N (5.0M), 4L, Poly Bottle
    Manufacturer: LabChem
    Shelf Life (months): 24, Traceable to NIST, UN Number: (1 per EA)
    Learn More
    was $204.00 Special Price $153.00
  22. Sulfuric Acid, 0.04N (0.02M), 1L, Poly Bottle
    Manufacturer: LabChem
    Shelf Life (months): 24, Traceable to NIST, UN Number: (1 per EA)
    Learn More
    was $36.10 Special Price $27.78
  23. Sodium Hypochlorite, Solution, 12 Percent Available Chlorine, Reagent, 500mL, CAS# 7681-52-9
    Manufacturer: Spectrum Chemical
    Sodium Hypochlorite, Solution, 12 Percent Available Chlorine, Reagent - The Reagent grade denotes that this chemical is the highest quality commercially available and that the American Chemical Society has not officially set any specifications for this material. Spectrum Chemical manufactured Reagent grade products meet the toughest regulatory standards for quality and purity.

    (1 per EA )
    Learn More
    was $104.20 Special Price $61.67
  24. Ferrous Ammonium Sulfate, 0.1 Normal, 1 L, Amber Glass
    Manufacturer: 710 Spirits Rocky Mtn Reagents
    N/10 (0.05 M); in 2 N Sulfuric Acid (1 per EA)
    Learn More
    $24.70
Filters
Set Descending Direction

7396 items

Page
per page
View as List Grid