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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Ammonium Hydroxide, 50 Percent (v/v) Solution, 4L, CAS# 1336-21-6SKU: A-160-4LTPL-EAManufacturer: Spectrum ChemicalAmmonium Hydroxide, 50 Percent (v/v) Solution - 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 $209.75 Special Price $170.67 -
Hydrochloric Acid, 0.1 N, Aqueous Solution, 20L, CAS# 7647-01-0SKU: H-120-20LT-EAManufacturer: Spectrum ChemicalHydrochloric Acid, 0.1 N, Aqueous Solution is a colorless, clear, highly corrosive, highly pungent solution of hydrogen chloride in water. As an monoprotic acid and one of the six common strong mineral acids it is the least likely to be subject to an oxidation-reduction reaction. Hydrochloric acid is frequently used during chemical analysis to prepare samples for analysis. It reacts with basic compounds, turning them into dissolved chlorides that can then undergo analysis. (1 per EA )Learn Morewas $332.45 Special Price $270.52 -
Antimony Trichloride TS, (U.S.P. Test Solution), 100mL, CAS# 37839-81-9SKU: A-317-100ML-EAManufacturer: Spectrum ChemicalAntimony Trichloride TS, (U.S.P. Test Solution) is a ready-for-use solution for the purpose of conducting USP, National Formulary and assay tests and is prepared according to the specifications of the USP Pharmacopeial Convention. (1 per EA )Learn Morewas $332.45 Special Price $319.69 -
Bromothymol Blue Indicator, 0.2% w/v Aqueous, Poly w/ FliptopSKU: CF1302-120mL-EAManufacturer: 710 Spirits Rocky Mtn ReagentsBromothymol Blue Indicator, 0.2% w/v Aqueous, Poly w/ Fliptop (1 per EA )Learn More$21.10 -
Potassium Fluoride, 44% w/v, 20.00 L CubitainerSKU: CP202900-20F-EAManufacturer: Reagents IncPotassium Fluoride, 44% w/v, 20.00 L Cubitainer (1 per EA )Learn Morewas $2,490.00 Special Price $1,867.32 - Ammonium Carbonate, 10% w/v, 10.00 L CubitainerSKU: CA005300-10F-EAManufacturer: Reagents IncAmmonium Carbonate, 10% w/v, 10.00 L Cubitainer (1 per EA )Learn Morewas $422.00 Special Price $316.44
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Sodium Lactate Solution, 60 Percent, FCC, 4L, CAS# 312-85-6SKU: S1217-4LT-EAManufacturer: Spectrum ChemicalSodium Lactate Solution, 60 Percent, FCC is used in food products as a preservative. The FCC grade meets the requirements of the Food Chemical Codex indicates and is suitable for all food, beverage and nutritional supplement applications. Spectrum Chemical offers over 300 Food grade chemical ingredients packaged in laboratory size bottles to production drum quantities and are manufactured, packaged and stored under current Good Manufacturing Practices (cGMP) per 21CFR part 211 in FDA registered and inspected facilities. (1 per EA)Learn Morewas $857.45 Special Price $634.27 -
Brilliant Green 1% (Aq), 500ML, Poly BottleSKU: LC118001-EAManufacturer: LabChemShelf Life (months): 24, , UN Number: (1 per EA)Learn Morewas $91.00 Special Price $68.25 -
Sodium Acetate 20% W/W, 4L, Poly BottleSKU: LC228304-EAManufacturer: LabChemShelf Life (months): 12, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $339.60 Special Price $254.70 - Buffer, pHospHate pH 7.0, 4L, Poly BottleSKU: LC185204-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $374.00 Special Price $280.50
- Sodium Carbonate, 1.0N (0.5M), 500ML, Poly BottleSKU: LC233801-EAManufacturer: LabChemShelf Life (months): 12, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $44.40 Special Price $33.30
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Acetic Acid, Glacial, TS - 500mLSKU: TS14002-500ml-EAManufacturer: Dawn ScientificAcetic Acid, Glacial, TS - 500mL (1 per EA )Learn Morewas $69.62 Special Price $67.88 -
Bromophenol Blue, 1% w/v Solution, 1 LSKU: B1019-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentspH 3.0 (yellow) - pH 4.6 (blue) (1 per EA)Learn More$46.70 -
Potassium Chloride, 3 Molar, 3.8 L, Poly GallonSKU: P1034-3.8L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsPotassium Chloride, 3 Molar, 3.8 L, Poly Gallon (1 per EA)Learn More$71.10 -
Sodium Hydroxide 40% W/W, 1L, Poly BottleSKU: LC241202-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: UN1824 (1 per EA)Learn Morewas $73.00 Special Price $54.75 -
Silver Nitrate, 0.282N (0.282M), 500ML, Amber GlassSKU: LC227251-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $348.90 Special Price $261.67 - Potassium Dichromate, 0.5N (0.083M), 4L, Poly BottleSKU: LC190204-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $266.20 Special Price $199.65
- Acetic Acid, 0.1N (0.1M), 1L, Poly BottleSKU: LC103502-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $47.30 Special Price $35.48
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Hardness Reagent .01M, gal, 4-packSKU: R-0618-G-4-PKManufacturer: Taylor TechnologiesHardness Reagent .01M, gal, 4-pack (4 per PK)Learn Morewas $190.99 Special Price $145.89 -
Ammonia Solution, FCC, 20L, CAS# 1336-21-6SKU: A1293-20LT-EAManufacturer: Spectrum ChemicalAmmonia Solution, FCC is a solution of Ammonia in water. It has many uses, but in food production it is used primarily as a leavening agent. Spectrum Chemical offers over 300 Food Grade (FCC) chemical ingredients packaged in laboratory size bottles to production drum quantities and are manufactured, packaged and stored under current Good Manufacturing Practices (cGMP) per 21CFR part 211 in FDA registered and inspected facilities. (1 per EA )Learn Morewas $1,060.20 Special Price $862.68 - Aluminum Chloride, 0.16 Molar , 3.8 L, Poly GallonSKU: A1038-3.8L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsAluminum Chloride, 0.16 Molar , 3.8 L, Poly Gallon (1 per EA)Learn More$51.25
- Iodine, 0.0156 Normal, 1 L, Amber GlassSKU: I1015-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsIodine, 0.0156 Normal, 1 L, Amber Glass (1 per EA)Learn More$23.00
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Isopropyl Alcohol, 70% v/v, USP, 1 gal, Poly Gallon CAS# 67-63-0SKU: I1022-1gal-EAManufacturer: 710 Spirits Rocky Mtn ReagentsRubbing Alcohol; Isopropanol; 2-propanol (1 per EA)Learn More$39.15 - Sodium Hydroxide, 1 Normal, 3.8 L, Poly GallonSKU: S1028-3.8L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsN/1 (1 M) (1 per EA)Learn More$39.25
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4L Yellow Buffer Solution pH 7.0 @ 25°C, Poly Bottle
was $74.64 Special Price $21.46
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
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