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
-
Sulfuric Acid 37% V/V (37+63), 500ML, Poly BottleSKU: LC256201-EAManufacturer: LabChemShelf Life (months): 36, Traceable to NIST, UN Number: UN2796 (1 per EA)Learn Morewas $45.50 Special Price $35.00 - Sodium Thiosulfate, 0.2N (0.2M), 500ML, Poly BottleSKU: LC250651-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $28.80 Special Price $22.16
-
Acetic Acid, 10% v/v Solution, 500 mLSKU: A1006-500mL-EAManufacturer: 710 Spirits Rocky Mtn ReagentsAcetic Acid, 10% v/v Solution, 500 mL (1 per EA)Learn More$18.85 -
Silver Nitrate, 0.74% w/v Solution, 500 mL, Amber PolySKU: S1097-500mL-EAManufacturer: 710 Spirits Rocky Mtn ReagentsSilver Nitrate, 0.74% w/v Solution, 500 mL, Amber Poly (1 per EA)Learn More$45.65 -
Sulfuric Acid 10% W/W, 2.5L, Clear GlassSKU: LC255903-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: UN2796 (1 per EA)Learn Morewas $100.20 Special Price $77.09 -
Ferrous Sulfate Solution 5% Fe, 200.00 L DrumSKU: CF003200-200E-EAManufacturer: Reagents IncFerrous Sulfate Solution 5% Fe, 200.00 L Drum (1 per EA )Learn Morewas $966.00 Special Price $724.68 -
Phenolphthalein Indicator, .75 oz w/ green cap, Dropper BottleSKU: R-0638G-A-EAManufacturer: Taylor TechnologiesPhenolphthalein Indicator, .75 oz w/ green cap, Dropper Bottle (1 per EA)Learn Morewas $8.38 Special Price $6.40 -
Sulfuric Acid 50% V/V (1+1), 1L, Amber GlassSKU: LC256402-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: UN1830 (1 per EA)Learn Morewas $62.30 Special Price $46.72 -
Trichloroacetic Acid, 100 Percent (w/v) Aqueous Solution, 500mL, CAS# 76-03-9SKU: T-184-500MLGL-EAManufacturer: Spectrum ChemicalTrichloroacetic Acid, 100 Percent (w/v) Aqueous Solution and other TCA solutions are used, depending upon grade and purity, in biochemistry to help the precipitation of macromolecules, cosmetics, topical medication preparations and in the production of pesticides. 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 $707.55 Special Price $575.73 -
Sodium Cobaltinitrite TS - 500mLSKU: TS14253-500ml-EAManufacturer: Dawn ScientificSodium Cobaltinitrite TS - 500mL (1 per EA )Learn Morewas $539.62 Special Price $526.13 -
Trichloroacetic Acid 80% W/V, 500ML, Amber GlassSKU: LC262651-EAManufacturer: LabChemShelf Life (months): 12, Traceable to NIST, UN Number: UN2564 (1 per EA)Learn Morewas $207.90 Special Price $159.94 - Sulfuric Acid, 20% v/v, 200.00 L DrumSKU: CS103500-200E-EAManufacturer: Reagents IncSulfuric Acid, 20% v/v, 200.00 L Drum (1 per EA )Learn Morewas $1,080.00 Special Price $810.00
- Citric Acid 10% W/V, 500ML, Poly BottleSKU: LC131501-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $46.40 Special Price $34.80
- Lugol's Iodine, 1 LSKU: L1010-1L-EAManufacturer: 710 Spirits Rocky Mtn Reagents2.1% w/v Iodine in 4.2% w/v Potassium Iodide (1 per EA)Learn More$43.75
- Chrome Testing Solution, 1.00 L Poly naturalSKU: CC221000-1A-EAManufacturer: Reagents IncChrome Testing Solution, 1.00 L Poly natural (1 per EA )Learn Morewas $51.00 Special Price $37.80
-
PBS, Phosphate Buffered Saline, 1X Solution, 1.5ml Pre-Filled Tubes, Sterile, 100 Tubes per CaseSKU: P10420-100.0-PKManufacturer: Research Products InternationalSodium Chloride: 137 mM Potassium Chloride: 2.7 mM Phosphate Buffer: 11.9 mM pH: 7.4 Does not contain Calcium or Magnesium Mol. Wt: Common Name: Phosphate Buffered Saline 1X Sterile Solution Formula: Dimensions: 10.50 x 10.00 x 5.25 Weight: 0.88 - Re (100 per PK)Learn More$268.45 - Triton X-100, 500ML, Poly BottleSKU: LC262801-EAManufacturer: LabChemShelf Life (months): , , UN Number: (1 per EA)Learn Morewas $89.60 Special Price $68.93
- Nitric Acid 10% V/V, 500ML, Amber GlassSKU: LC177301-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: UN2031 (1 per EA)Learn Morewas $45.10 Special Price $33.83
-
Sodium Carbonate, 1.0N (0.5M), 1L, Poly BottleSKU: LC233802-EAManufacturer: LabChemShelf Life (months): 12, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $61.40 Special Price $46.05 - Ammonium Thiocyanate 30% W/V, 500ML, Poly BottleSKU: LC113451-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $133.10 Special Price $99.82
-
Hydrochloric Acid 1N, 2 oz, Dropper BottleSKU: R-0738-C-EAManufacturer: Taylor TechnologiesHydrochloric Acid 1N, 2 oz, Dropper Bottle (1 per EA)Learn Morewas $27.36 Special Price $20.90 -
Sulfuric Acid .6N, 2 oz w/ green cap, Dropper BottleSKU: R-0736G-C-EAManufacturer: Taylor TechnologiesSulfuric Acid .6N, 2 oz w/ green cap, Dropper Bottle (1 per EA)Learn Morewas $13.85 Special Price $10.58 - Sodium Hydroxide, 50% w/w RGT, 275.00 gal ToteSKU: C1318600-275E3-EAManufacturer: Reagents IncSodium Hydroxide, 50% w/w RGT, 275.00 gal Tote (1 per EA )Learn Morewas $8,590.00 Special Price $6,442.20
- Lactic Acid, 1.0N (1.0M), 1L, Poly BottleSKU: LC160202-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $112.70 Special Price $84.52
How Can We Help?
This is a custom sub-title.
LPS provides procurement services:
Strategic and customized product sourcing services to find the best vendorsUnparalleled customer service from dedicated procurement managers
Custom web portal where you can order items from any vendor on one site
Consolidate orders and invoices
Wholesale “club” pricing for members
Procure-to-Pay software solutions and process consulting
Enterprise procurement solutions designed for small and mid-sized labs