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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Diluted Hydrochloric Acid, 10 Percent (w/v), NF, 2.5L, CAS# 7647-01-0SKU: HY105-2.5LTPV-EAManufacturer: Spectrum ChemicalDiluted Hydrochloric Acid, 10 Percent (w/v), NF is a pH acidifier excipient. All Spectrum Chemical NF grade products are manufactured, packaged and stored under current Good Manufacturing Practices (cGMP). (1 per EA )Learn Morewas $311.60 Special Price $230.49 -
Potassium Dichromate, 0.1 N, 1.00 L Poly naturalSKU: C7282530-1A-EAManufacturer: Reagents IncPotassium Dichromate, 0.1 N, 1.00 L Poly natural (1 per EA )Learn Morewas $50.50 Special Price $37.80 -
Silver-Ammonia-Nitrate TS - 500mLSKU: TS14238-500ml-EAManufacturer: Dawn ScientificSilver-Ammonia-Nitrate TS - 500mL (1 per EA )Learn Morewas $144.62 Special Price $141.00 - Starch Indicator, 1% w/v noPrs, 1.00 L Poly naturalSKU: CS000800-1A-EAManufacturer: Reagents IncStarch Indicator, 1% w/v noPrs, 1.00 L Poly natural (1 per EA )Learn Morewas $68.50 Special Price $51.84
- Super Picral, 500.00 mL Glass amberSKU: CP122200-500C-EAManufacturer: Reagents IncSuper Picral, 500.00 mL Glass amber (1 per EA )Learn Morewas $607.00 Special Price $455.76
- Barium Chloride TS - 500mLSKU: TS14049-500ml-EAManufacturer: Dawn ScientificBarium Chloride TS - 500mL (1 per EA )Learn Morewas $38.62 Special Price $37.66
- Alkaline Cupric Citrate TS 2 - 500mLSKU: TS14017-500ml-EAManufacturer: Dawn ScientificAlkaline Cupric Citrate TS 2 - 500mL (1 per EA )Learn Morewas $219.62 Special Price $214.13
- 2-Naphthol TS (Betanaphthol TS) - 100mLSKU: TS14183-100ml-EAManufacturer: Dawn Scientific2-Naphthol TS (Betanaphthol TS) - 100mL (1 per EA )Learn Morewas $59.62 Special Price $58.13
- Hydrochloric Acid, 18% w/w, 20.00 L CubitainerSKU: CH129500-20F-EAManufacturer: Reagents IncHydrochloric Acid, 18% w/w, 20.00 L Cubitainer (1 per EA )Learn Morewas $295.00 Special Price $221.40
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Slide, Chlorine OT, 0-1.0, 0.1-4.0, or 0.2-3.0 ppmSKU: 5155-EAManufacturer: Taylor TechnologiesSlide, Chlorine OT, 0-1.0, 0.1-4.0, or 0.2-3.0 ppm (1 per EA )Learn Morewas $1.04 Special Price $0.16 - Sodium Carbonate, 0.02 N, 500.00 mL Poly naturalSKU: CS121200-500A-EAManufacturer: Reagents IncSodium Carbonate, 0.02 N, 500.00 mL Poly natural (1 per EA )Learn Morewas $50.00 Special Price $37.80
- D-Gluconic Acid, 50 Percent Aqueous Solution, 1L, CAS# 51811-82-6SKU: GL105-1LT-EAManufacturer: Spectrum ChemicalD-Gluconic Acid, 50 Percent Aqueous Solution, also known as Dextronic acid, is considered a gluconate and can be used to treat burns from hydrofluoric acid. 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 $107.85 Special Price $87.76
- Indicator Solution,I2/KI/H3BO3, 1.00 L Glass amberSKU: CI000300-1C-EAManufacturer: Reagents IncIndicator Solution,I2/KI/H3BO3, 1.00 L Glass amber (1 per EA )Learn Morewas $103.00 Special Price $77.76
- Potassium Dichromate, 0.15 N, 1.00 L Poly naturalSKU: CP030100-1A-EAManufacturer: Reagents IncPotassium Dichromate, 0.15 N, 1.00 L Poly natural (1 per EA )Learn Morewas $63.00 Special Price $47.52
- Ferric Chloride, 20% w/v, 1.00 L Poly naturalSKU: CF150500-1A-EAManufacturer: Reagents IncFerric Chloride, 20% w/v, 1.00 L Poly natural (1 per EA )Learn Morewas $153.00 Special Price $114.48
- Barium Chloride, 12% w/v BaCl2, 500.00 mL Poly naturalSKU: CB112100-500A-EAManufacturer: Reagents IncBarium Chloride, 12% w/v BaCl2, 500.00 mL Poly natural (1 per EA )Learn Morewas $138.00 Special Price $103.68
- Phosphoric Acid, 25 Percent (v/v) Aqueous, 4L, CAS# 7664-38-2SKU: P-370-4LT-EAManufacturer: Spectrum ChemicalPhosphoric Acid, 25 Percent (v/v) Aqueous - 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 )Learn Morewas $396.75 Special Price $322.83
- Ammoniacal Potassium Fericyanide TS - 100mLSKU: TS14031-100ml-EAManufacturer: Dawn ScientificAmmoniacal Potassium Fericyanide TS - 100mL (1 per EA )Learn Morewas $54.62 Special Price $53.25
- VB XO, 120.00 mL Glass amberSKU: C8310200-120C-EAManufacturer: Reagents IncVB XO, 120.00 mL Glass amber (1 per EA )Learn Morewas $80.50 Special Price $60.48
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Buffer Solution pH 10.0, 500ML, Poly BottleSKU: LC124551-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $27.40 Special Price $20.55 - Hydrochloric Acid Tech 20°Be, 15.00 gal DrumSKU: C5101000-15E-EAManufacturer: Reagents IncHydrochloric Acid Tech 20°Be, 15.00 gal Drum (1 per EA )Learn Morewas $571.00 Special Price $428.76
- Potassium Hydroxide, 50% w/v, 4.00 L Poly naturalSKU: CP004700-4A-EAManufacturer: Reagents IncPotassium Hydroxide, 50% w/v, 4.00 L Poly natural (1 per EA )Learn Morewas $257.00 Special Price $192.24
- 2-Naphthol TS (Betanaphthol TS) - 500mLSKU: TS14183-500ml-EAManufacturer: Dawn Scientific2-Naphthol TS (Betanaphthol TS) - 500mL (1 per EA )Learn Morewas $134.62 Special Price $131.25
- Silver Nitrate, 0.0141 N, 20.00 L CubitainerSKU: CS003800-20F-EAManufacturer: Reagents IncSilver Nitrate, 0.0141 N, 20.00 L Cubitainer (1 per EA )Learn Morewas $845.00 Special Price $633.96
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LPS 200uL Universal Pipet Tips, Yellow, Bulk, PK1000
was $20.00 Special Price $15.75
BEAD BATH 20 L, 120 V, TYPE B PLUG, Liters/EA: 20
was $1,794.65 Special Price $1,714.78
4L Yellow Buffer Solution pH 7.0 @ 25°C, Poly Bottle
was $74.64 Special Price $21.46
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