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
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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
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Edetate Disodium TS - 100mLSKU: TS14105-100ml-EAManufacturer: Dawn ScientificEdetate Disodium TS - 100mL (1 per EA )Learn Morewas $35.62 Special Price $34.73 - 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
- Chloroform/Methanol, 52:48, 4.00 L Glass amberSKU: CC110500-4C-EAManufacturer: Reagents IncChloroform/Methanol, 52:48, 4.00 L Glass amber (1 per EA )Learn Morewas $320.00 Special Price $239.76
- Methanol, 77% v/v, HPLC, 4.00 L Glass amberSKU: CM122800-4C-EAManufacturer: Reagents IncMethanol, 77% v/v, HPLC, 4.00 L Glass amber (1 per EA )Learn Morewas $175.00 Special Price $131.76
- Methanol/Water, 47/53, pH 2.7, 4.00 L Glass amberSKU: CM031100-4C-EAManufacturer: Reagents IncMethanol/Water, 47/53, pH 2.7, 4.00 L Glass amber (1 per EA )Learn Morewas $236.00 Special Price $177.12
- Crystal Violet TS - 100mLSKU: TS14080-100ml-EAManufacturer: Dawn ScientificCrystal Violet TS - 100mL (1 per EA )Learn Morewas $54.62 Special Price $53.25
- Phenol/Methanol 90:10 w/w, 2.50 L EachSKU: CP611000-2.5Y-EAManufacturer: Reagents IncPhenol/Methanol 90:10 w/w, 2.50 L Each (1 per EA )Learn Morewas $454.00 Special Price $340.20
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Methyl Orange-Xylene Cyanol, Indicator Solution, Changes color from purple (pH=3.0) to green (pH=4.5), 1LSKU: M1267-1LT-EAManufacturer: Spectrum ChemicalMethyl Orange-Xylene Cyanol, Indicator Solution, Changes color from purple (pH=3.0) to green (pH=4.5) - 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 Morewas $108.90 Special Price $97.85 - Silver Nitrate TS - 1LSKU: TS14241-1L-EAManufacturer: Dawn ScientificSilver Nitrate TS - 1L (1 per EA )Learn Morewas $179.62 Special Price $175.13
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Potassium Permanganate, 0.1 N Aqueous Solution, 1L, CAS# 7722-64-7SKU: P-445-1LT-EAManufacturer: Spectrum ChemicalPotassium Permanganate, 0.1 N Aqueous Solution - 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 Morewas $102.10 Special Price $83.07 -
Potassium Thiocyanate, 0.1 N Aqueous Solution, 1L, CAS# 333-20-0SKU: P-480-1LT-EAManufacturer: Spectrum ChemicalPotassium Thiocyanate, 0.1 N Aqueous Solution - 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 Morewas $66.15 Special Price $53.83 -
Hydroxylamine Hydrochloride 50%, 500ML, Poly BottleSKU: LC155501-EAManufacturer: LabChemShelf Life (months): 24, , UN Number: UN3287 (1 per EA)Learn Morewas $243.00 Special Price $182.25 - Ammonium Bifluoride, 20% w/v, 1.00 L Poly naturalSKU: CA105000-1A-EAManufacturer: Reagents IncAmmonium Bifluoride, 20% w/v, 1.00 L Poly natural (1 per EA )Learn Morewas $102.00 Special Price $76.68
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Sodium Sulfate, 20% w/w Solution, 1 L, PolySKU: S1233-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsSodium Sulfate, 20% w/w Solution, 1 L, Poly (1 per EA )Learn More$80.65 - Dithizone TS - 500mLSKU: TS14103-500ml-EAManufacturer: Dawn ScientificDithizone TS - 500mL (1 per EA )Learn Morewas $119.62 Special Price $116.63
- Tartrate Buffer pH 3.56, 4.00 L Poly naturalSKU: CT002400-4A-EAManufacturer: Reagents IncTartrate Buffer pH 3.56, 4.00 L Poly natural (1 per EA )Learn Morewas $505.00 Special Price $388.50
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BEAD BATH 20 L, 120 V, TYPE B PLUG, Liters/EA: 20
was $1,794.65 Special Price $1,714.78
LPS 200uL Universal Pipet Tips, Yellow, Bulk, PK1000
was $20.00 Special Price $15.75
4L Yellow Buffer Solution pH 7.0 @ 25°C, Poly Bottle
was $74.64 Special Price $21.46
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