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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Isopropyl Alcohol, 91% v/v Solution, 55 gal, Drum CAS# 67-63-0SKU: CF1180-55gal-EAManufacturer: 710 Spirits Rocky Mtn ReagentsIsopropyl Alcohol, 91% v/v Solution, 55 gal, Drum CAS# 67-63-0 (1 per EA )Learn More$1,934.00 -
Barium Hydroxide TS - 100mLSKU: TS14050-100ml-EAManufacturer: Dawn ScientificBarium Hydroxide TS - 100mL (1 per EA )Learn Morewas $34.62 Special Price $33.75 -
Buffer Solution pH 6.0, 10L, Cubitainer®SKU: LC123306-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $233.50 Special Price $175.12 -
Buffer Solution pH 9.18, 1L, Poly BottleSKU: LC124502-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $78.90 Special Price $59.17 -
Buffer Solution For Nitrogen (Nitrate), 1L, Amber GlassSKU: LC125762-EAManufacturer: LabChemShelf Life (months): 24, , UN Number: (1 per EA)Learn Morewas $162.70 Special Price $122.03 - Potassium Hydroxide, 0.05N (0.05M), 1L, Poly BottleSKU: LC192802-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $80.90 Special Price $60.67
- Silver Nitrate, 1.0N (1.0M), 1L, Amber GlassSKU: LC227402-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $1,389.40 Special Price $1,042.05
- Silver Nitrate, 0.141N (0.141M), 1L, Amber GlassSKU: LC227102-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $320.90 Special Price $240.68
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Potassium Dichromate 4% W/V, 500ML, Poly BottleSKU: LC189451-EAManufacturer: LabChemShelf Life (months): 24, , UN Number: (1 per EA)Learn Morewas $59.00 Special Price $44.25 -
Potassium Hydroxide, 0.1N (0.1M) In Ipa, 20L, Cubitainer®SKU: LC195505-EAManufacturer: LabChemShelf Life (months): 18, Traceable to NIST, UN Number: UN1993 (1 per EA)Learn Morewas $452.50 Special Price $339.38 - Barium Chloride 10% W/V, 20L, Cubitainer®SKU: LC116005-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $722.60 Special Price $541.95
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Hydrochloric Acid, 5.0 N Solution, 1L, CAS# 7647-01-0SKU: H-106-1LT-EAManufacturer: Spectrum ChemicalHydrochloric Acid, 5.0 N 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 $87.95 Special Price $71.56 -
Sodium Hydroxide, 0.100 N Solution, APHA, 500mL, CAS# 1310-73-2SKU: S-340-500ML-EAManufacturer: Spectrum ChemicalSodium Hydroxide, 0.100 N Solution, APHA is a standard solution of Caustic soda ideally suited for laboratory titrimetric techniques. You can rely on the quality of LabChem analytical test solutions for lot-to-lot reproducibility. (1 per EA )Learn Morewas $63.55 Special Price $51.71 -
Sulfuric Acid, 25 Percent (v/v) Solution93-9SKU: S1821-2.5LT-EAManufacturer: Spectrum ChemicalSulfuric Acid, 25 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 $263.80 Special Price $158.02 -
Sodium Hydroxide, 0.100 N Solution, APHA, 20L, CAS# 1310-73-2SKU: S-340-20LT-EAManufacturer: Spectrum ChemicalSodium Hydroxide, 0.100 N Solution, APHA is a standard solution of Caustic soda ideally suited for laboratory titrimetric techniques. You can rely on the quality of LabChem analytical test solutions for lot-to-lot reproducibility. (1 per EA )Learn Morewas $326.05 Special Price $265.31 -
Sulfuric Acid, 0.100N, APHA, Solution, 20L, CAS# 7664-93-9SKU: S-615-20LT-EAManufacturer: Spectrum ChemicalSulfuric Acid, 0.100N, APHA, Solution - As an APHA certified solution, this item is meets the ASTM D1209 standards and can be used in water and waste water treatment facilities to determine the concentration of dissolved and particulate materials. Spectrum Chemical manufactured APHA grade products meet the toughest regulatory standards for quality and purity. (1 per EA )Learn Morewas $244.65 Special Price $199.08 -
Bromothymol Blue, 0.04% w/v Solution, 120 mLSKU: B1013-120mL-EAManufacturer: 710 Spirits Rocky Mtn ReagentspH 6.0 (yellow) - pH 7.6 (blue) (1 per EA)Learn More$14.50 -
Bromothymol Blue Indicator, 0.1% w/v Aqueous, 3.8 LSKU: B1020-3.8L-EAManufacturer: 710 Spirits Rocky Mtn ReagentspH 6.0 (yellow) - pH 7.6 (blue) (1 per EA)Learn More$39.05 - Phosphate Buffer, 0.134 Molar, pH 7.4, 1 L, PolySKU: CF1019-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsPhosphate Buffer, 0.134 Molar, pH 7.4, 1 L, Poly (1 per EA )Learn More$44.15
- Eriochrome Black T, 1% w/w in Sodium Chloride, 100 gSKU: E1013-100g-EAManufacturer: 710 Spirits Rocky Mtn ReagentsEBT Indicator; Moderate Black II (1 per EA)Learn More$24.85
- Sulfuric Acid, 50% v/v Solution, 1 LSKU: S1067-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsSulfuric Acid, 50% v/v Solution, 1 L (1 per EA)Learn More$31.70
- Sulfuric Acid, 2 Normal, 3.8 L, Poly GallonSKU: S1114-3.8L-EAManufacturer: 710 Spirits Rocky Mtn Reagents1 M (1 per EA)Learn More$38.30
- Wright's Buffer, pH 6.4, 940 mLSKU: W1002-940mL-EAManufacturer: 710 Spirits Rocky Mtn ReagentsWright's Buffer, pH 6.4, 940 mL (1 per EA)Learn More$13.85
- Thymolphthalein Indicator, 1% w/v in Denatured Ethanol, 500 mLSKU: T1016-500mL-EAManufacturer: 710 Spirits Rocky Mtn ReagentspH 8.8 (colorless) - pH 10.5 (blue) (1 per EA)Learn More$116.35
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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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