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.
Shop by type: pH Buffers · Blends
Top brands: Reagents Inc · LabChem · Spectrum Chemical
Popular Buffers and Solutions:
Buffers and Solutions
-
Phenolphthalein, 0.7% /MeOH, 4.00 L Poly naturalSKU: CP260600-4A-EAManufacturer: Reagents IncPhenolphthalein, 0.7% /MeOH, 4.00 L Poly natural (1 per EA )Learn Morewas $160.00 Special Price $119.88 - Potassium Iodide, 50% w/v, 1.00 L Glass amberSKU: CP003800-1C-EAManufacturer: Reagents IncPotassium Iodide, 50% w/v, 1.00 L Glass amber (1 per EA )Learn Morewas $216.00 Special Price $162.00
- Potassium Chromate, 1% w/v, 1.00 L Poly naturalSKU: CP091600-1A-EAManufacturer: Reagents IncPotassium Chromate, 1% w/v, 1.00 L Poly natural (1 per EA )Learn Morewas $59.50 Special Price $44.28
- Sodium Hydroxide, 20% w/v, 500.00 mL Poly naturalSKU: CS101000-500A-EAManufacturer: Reagents IncSodium Hydroxide, 20% w/v, 500.00 mL Poly natural (1 per EA )Learn Morewas $43.50 Special Price $32.40
- ACF Buffer, 4.00 L Poly naturalSKU: CA106000-4A-EAManufacturer: Reagents IncACF Buffer, 4.00 L Poly natural (1 per EA )Learn Morewas $1,090.00 Special Price $817.56
- Potassium Iodate, 0.125 N, 1.00 L Glass amberSKU: CP105500-1C-EAManufacturer: Reagents IncPotassium Iodate, 0.125 N, 1.00 L Glass amber (1 per EA )Learn Morewas $67.00 Special Price $50.76
- Sodium Hydroxide, 0.1667 N, 20.00 L CubitainerSKU: CS101900-20F-EAManufacturer: Reagents IncSodium Hydroxide, 0.1667 N, 20.00 L Cubitainer (1 per EA )Learn Morewas $199.00 Special Price $149.04
- EDTA Titrant, 0.005 M, 1.00 L Poly naturalSKU: CE250600-1A-EAManufacturer: Reagents IncEDTA Titrant, 0.005 M, 1.00 L Poly natural (1 per EA )Learn Morewas $70.50 Special Price $52.92
- Buffer pH 6.9 for Sulfite, 4.00 L Poly naturalSKU: CB002000-4A-EAManufacturer: Reagents IncBuffer pH 6.9 for Sulfite, 4.00 L Poly natural (1 per EA )Learn Morewas $87.00 Special Price $64.80
- Doctor Solution (Sod Plumbite), 1.00 L Poly naturalSKU: CD100100-1A-EAManufacturer: Reagents IncDoctor Solution (Sod Plumbite), 1.00 L Poly natural (1 per EA )Learn Morewas $72.00 Special Price $54.00
- Pot Hydroxide, 0.02 N /Rgt Alc, 1.00 L Poly naturalSKU: CP118800-1A-EAManufacturer: Reagents IncPot Hydroxide, 0.02 N /Rgt Alc, 1.00 L Poly natural (1 per EA )Learn Morewas $57.00 Special Price $43.20
- Methanol/Rgt Alcohol, 95:5, 1.00 L Poly naturalSKU: CM127700-1A-EAManufacturer: Reagents IncMethanol/Rgt Alcohol, 95:5, 1.00 L Poly natural (1 per EA )Learn Morewas $44.50 Special Price $33.48
- Ammonium Acetate/Acetic Acid, 1.00 L Poly naturalSKU: CA013900-1A-EAManufacturer: Reagents IncAmmonium Acetate/Acetic Acid, 1.00 L Poly natural (1 per EA )Learn Morewas $54.50 Special Price $41.04
- Buffer, pH 7.00, Clear, 1.00 L Poly naturalSKU: C2156010-1A-EAManufacturer: Reagents IncBuffer, pH 7.00, Clear, 1.00 L Poly natural (1 per EA )Learn Morewas $43.00 Special Price $32.40
- Potassium Dichromate TS, 100.00 mL Poly naturalSKU: CP204300-100A-EAManufacturer: Reagents IncPotassium Dichromate TS, 100.00 mL Poly natural (1 per EA )Learn Morewas $98.00 Special Price $73.44
- Buffer, pH 7.00, Clear, 200.00 L DrumSKU: C2156010-200E-EAManufacturer: Reagents IncBuffer, pH 7.00, Clear, 200.00 L Drum (1 per EA )Learn Morewas $875.00 Special Price $656.64
- Hydrochloric Acid,0.1 N/RgtAlc, 4.00 L Poly naturalSKU: CH128000-4A-EAManufacturer: Reagents IncHydrochloric Acid,0.1 N/RgtAlc, 4.00 L Poly natural (1 per EA )Learn Morewas $164.00 Special Price $123.12
- Potassium Hydroxide, 1.0 N, 4.00 L Poly naturalSKU: CP116400-4A-EAManufacturer: Reagents IncPotassium Hydroxide, 1.0 N, 4.00 L Poly natural (1 per EA )Learn Morewas $88.00 Special Price $65.88
- Acetate Buffer pH 4, 20.00 L CubitainerSKU: CB101500-20F-EAManufacturer: Reagents IncAcetate Buffer pH 4, 20.00 L Cubitainer (1 per EA )Learn Morewas $503.00 Special Price $376.92
- Calcium Chloride, 0.01 M, 4.00 L Poly naturalSKU: CC013000-4A-EAManufacturer: Reagents IncCalcium Chloride, 0.01 M, 4.00 L Poly natural (1 per EA )Learn Morewas $586.00 Special Price $439.56
- Silver Nitrate 0.05 N, 4.00 L CubitainerSKU: CS145100-4F-EAManufacturer: Reagents IncSilver Nitrate 0.05 N, 4.00 L Cubitainer (1 per EA )Learn Morewas $520.00 Special Price $389.88
- Phosphoric Acid CP 85% w/w, 15.00 K EachSKU: C5102000-15KG-EAManufacturer: Reagents IncPhosphoric Acid CP 85% w/w, 15.00 K Each (1 per EA )Learn Morewas $623.00 Special Price $467.64
- Sodium Hydroxide, 6 N, 10.00 L CubitainerSKU: CS104300-10F-EAManufacturer: Reagents IncSodium Hydroxide, 6 N, 10.00 L Cubitainer (1 per EA )Learn Morewas $216.00 Special Price $162.00
- Hydrochloric Acid, 0.1 N, 500.00 mL Poly naturalSKU: C7101000-500A-EAManufacturer: Reagents IncHydrochloric Acid, 0.1 N, 500.00 mL Poly natural (1 per EA )Learn Morewas $23.50 Special Price $17.28
- Manufacturer Reagents Inc Remove This Item
How Can We Help?
This is a custom sub-title.
LPS provides procurement services:
Strategic and customized product sourcing services to find the best vendorsUnparalleled customer service from dedicated procurement managers
Custom web portal where you can order items from any vendor on one site
Consolidate orders and invoices
Wholesale “club” pricing for members
Procure-to-Pay software solutions and process consulting
Enterprise procurement solutions designed for small and mid-sized labs