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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Potassium Permanganate 0.891G/L, 1L, Amber GlassSKU: LC198602-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $54.70 Special Price $41.03 -
Hydroxylamine Hydrochloride 20% W/V, 500ML, Poly BottleSKU: LC155401-EAManufacturer: LabChemShelf Life (months): 24, , UN Number: (1 per EA)Learn Morewas $130.40 Special Price $97.80 -
Sulfuric Acid N, 16 ozSKU: R-0686-E-EAManufacturer: Taylor TechnologiesSulfuric Acid N, 16 oz (1 per EA)Learn Morewas $27.89 Special Price $21.31 -
Hydrochloric Acid, 1 N, 200.00 L DrumSKU: C7101080-200E-EAManufacturer: Reagents IncHydrochloric Acid, 1 N, 200.00 L Drum (1 per EA )Learn Morewas $912.00 Special Price $683.64 -
Hydrogen Peroxide, 3 Percent Solution, Reagent, 200L, CAS# 7722-84-1SKU: H1060-200LTBL-EAManufacturer: Spectrum ChemicalHydrogen Peroxide, 3 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 hydroperoxide or peroxide salts. One of its biggest uses is in the treatment of drinking water, removing odors, organic materials and the amount of Hydrogen sulfides and Iron. Its reagent grade means it is used as the standard against which other compounds are graded in analytical testing labs. (1 per EA )Learn More$4,391.45 - Sodium Hydroxide, 15% w/v, 20.00 L CubitainerSKU: CS160500-20F-EAManufacturer: Reagents IncSodium Hydroxide, 15% w/v, 20.00 L Cubitainer (1 per EA )Learn Morewas $223.00 Special Price $167.40
- Silver Nitrate, 0.0171N (0.0171M), 1L, Amber GlassSKU: LC226202-EAManufacturer: LabChemShelf Life (months): 18, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $65.80 Special Price $49.35
- Potassium Oxalate 2% W/V, 500ML, Poly BottleSKU: LC198401-EAManufacturer: LabChemShelf Life (months): 36, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $53.00 Special Price $39.75
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Vario Sulfate 4 Reagent, F25 100 Pack, Ea/1SKU: 532150-EAManufacturer: Lovibond Tintometer GroupDirect Replacement for Hach P/N 1206599. (1 per EA )Learn More$42.85 -
Aluminum Chloride Solution, 125ML, Poly BottleSKU: LC108207-EAManufacturer: LabChemShelf Life (months): 24, , UN Number: UN2581 (1 per EA)Learn Morewas $97.40 Special Price $73.05 -
Hydrochloric Acid, 0.2N (0.2M), 4L, Poly BottleSKU: LC152404-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: UN1789 (1 per EA)Learn Morewas $82.40 Special Price $61.80 -
Isopropyl Alcohol, 70% - 500ml (16oz) w/Trigger SprayerSKU: 151009TS-500ML-EAManufacturer: CorechemSynonyms: Antiformin bleach chloride, Bleach, liquid bleach. Chemical Formula: NaOCL Description: Sodium Hypochlorite is a colorless or Slightly yellow watery liquid with an odor of household bleach. Applications: Sodium Hypochlorite is often used as a bleaching or disinfectant agent. It can also effectively be used for water purification. Packaging Options: Sodium Hypochlorite is available in 4 gal cases, 1 gal bulk, 550 lb, 15 gal, 300 lb drums, 2750 lb, 3300 lb totes, and 5 gallon carboys. Safety: Please see Sodium Hypochlorite, 12.5% Solution Safety Data Sheet for full safety and compatibility information. Transportation: UN1791, Hypochlorite solutions, 8, PG III (1 per EA )Learn Morewas $35.00 Special Price $26.84 -
Stannous Chloride 40%, 500ML, Amber GlassSKU: LC252001-EAManufacturer: LabChemShelf Life (months): 24, , UN Number: UN1789 (1 per EA)Learn Morewas $224.60 Special Price $172.79 -
Ammonium Chloride-Ammonium Hydroxide, Buffer Solution, pH 10.0 +/- 0.1, For Water Hardness, APHA, 1L, CAS# 55-21-0SKU: B-205-1LT-EAManufacturer: Spectrum ChemicalAmmonium Chloride-Ammonium Hydroxide, Buffer Solution, pH 10.0 +/- 0.1, For Water Hardness, APHA is an aqueous inorganic buffer solution concentrate that, when diluted, is used for the American Public Health Association's (APHA) method for determination of water hardness. Find the high quality buffer solution Ammonium Chloride-Ammonium Hydroxide at Spectrum. As an aqueous inorganic buffer solution concentrate, it is used for the American Public Health Association's (APHA) method for determination of water hardness after dilution. (1 per EA )Learn Morewas $116.35 Special Price $94.67 -
Sulfuric Acid, 0.25N (0.125M), 1L, Poly BottleSKU: LC257202-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: UN2796 (1 per EA)Learn Morewas $37.10 Special Price $28.54 -
Orthophenanthroline TS - 100mLSKU: TS14193-100ml-EAManufacturer: Dawn ScientificOrthophenanthroline TS - 100mL (1 per EA )Learn Morewas $49.62 Special Price $48.38 -
Silver Nitrate, 0.1N, Standardized Solution, 4L, CAS# 2051-85-6SKU: S-163-4LTPL-CSManufacturer: Spectrum ChemicalSilver Nitrate, 0.1N, Standardized Solution is an inorganic aqueous solution. It is used to titrimetrically determine purity of products containing halides by the direct titration with standardized silver nitrate solution. (4 per CS )Learn Morewas $2,135.35 Special Price $1,737.53 -
Sulfuric Acid Concentrated, 16 oz (GL)SKU: R-0608-E-EAManufacturer: Taylor TechnologiesSulfuric Acid Concentrated, 16 oz (GL) (1 per EA )Learn Morewas $49.83 Special Price $44.58 - Silver Nitrate, 0.05N (0.05M), 500ML, Amber GlassSKU: LC226701-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $105.60 Special Price $79.20
- Barium Chloride 10% W/V, 500ML, Poly BottleSKU: LC116001-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $41.70 Special Price $31.28
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Sulfuric Acid N/10, 32 ozSKU: R-0627S-10-F-EAManufacturer: Taylor TechnologiesSulfuric Acid N/10, 32 oz (1 per EA)Learn Morewas $31.69 Special Price $24.21 -
Sulfuric Acid, 25% v/v Solution, 500 mLSKU: S1066-500mL-EAManufacturer: 710 Spirits Rocky Mtn ReagentsSulfuric Acid, 25% v/v Solution, 500 mL (1 per EA)Learn More$21.45 - Acetic Acid, 3% v/v Solution, 120 mLSKU: A1005-120mL-EAManufacturer: 710 Spirits Rocky Mtn ReagentsAcetic Acid, 3% v/v Solution, 120 mL (1 per EA)Learn More$14.55
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Sulfuric Acid, 1.0N (0.5M), 20L, Cubitainer®SKU: LC257705-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: UN2796 (1 per EA)Learn Morewas $223.00 Special Price $171.56
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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
BEAD BATH 20 L, 120 V, TYPE B PLUG, Liters/EA: 20
was $1,794.65 Special Price $1,714.78
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