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
-
Sodium Hydroxide, 50 Percent (w/w), Solution, Reagent, 4L, CAS# 1310-73-2SKU: S1310-4LTPL-CSManufacturer: Spectrum ChemicalSodium Hydroxide, 50 Percent (w/w), Solution, Reagent is commonly known as Caustic soda. This inorganic compound is water soluble, as well as in ethanol and methanol. The dissolution of solid Sodium Hydroxide in water creates a highly exothermic reaction. The concentrated solution is suitable for further dilution or as a raw material feedstock in chemical synthetic transformations. As a Reagent grade item, Spectrum Chemical manufactured Sodium Hydroxide met the toughest regulatory standards for quality and purity. (4 per CS )Learn Morewas $1,072.60 Special Price $952.12 -
Potassium Sulfate TS - 100mLSKU: TS14227-100ml-EAManufacturer: Dawn ScientificPotassium Sulfate TS - 100mL (1 per EA )Learn Morewas $39.62 Special Price $38.63 -
Hydrogen Peroxide 2% W/W, 1L, Poly BottleSKU: LC154402-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $85.80 Special Price $64.35 -
Toluene/MEK/Butanol, 50:40:10, 4.00 L Glass amberSKU: CT144300-4C-EAManufacturer: Reagents IncToluene/MEK/Butanol, 50:40:10, 4.00 L Glass amber (1 per EA )Learn Morewas $182.00 Special Price $140.02 -
BromopHenolblue pH Indicator Solution 250 ML, Ea/1SKU: 451622-EAManufacturer: Lovibond Tintometer GroupLovibond® Bromophenol Blue pH Indicator, Solution 250 ml (1 per EA)Learn More$89.70 - Zinc Sulfate, 1.180 Spg, 1L, Poly BottleSKU: LC272702-EAManufacturer: LabChemShelf Life (months): 24, , UN Number: (1 per EA)Learn Morewas $55.60 Special Price $42.77
- Potassium Hydroxide, 0.5 N, 1.00 L Poly naturalSKU: CP119300-1A-EAManufacturer: Reagents IncPotassium Hydroxide, 0.5 N, 1.00 L Poly natural (1 per EA )Learn Morewas $43.50 Special Price $32.40
-
Hydrochloric Acid, 3.0N (3.0M) Electronic Grade, 4L, Poly BottleSKU: LC153404-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: UN1789 (1 per EA)Learn Morewas $290.20 Special Price $217.65 - Ammonium Chloride 10% W/V, 1L, Poly BottleSKU: LC110102-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $74.00 Special Price $55.50
- Thioacetamide TS - 100mLSKU: TS14291-100ml-EAManufacturer: Dawn ScientificThioacetamide TS - 100mL (1 per EA )Learn Morewas $38.62 Special Price $37.66
- Brilliant Blue G TS - 500mLSKU: TS14056-500ml-EAManufacturer: Dawn ScientificBrilliant Blue G TS - 500mL (1 per EA )Learn Morewas $69.62 Special Price $67.88
-
Strong Acid Solution, 500ML, Poly BottleSKU: LC253701-EAManufacturer: LabChemShelf Life (months): 24, , UN Number: UN2796 (1 per EA)Learn Morewas $90.50 Special Price $69.63 - Sodium Hydroxide 30% W/V, 1L, Poly BottleSKU: LC241102-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: UN1824 (1 per EA)Learn Morewas $91.50 Special Price $70.39
-
Cupriethylenediamine, 1.0M, 4L, Amber GlassSKU: LC135434-EAManufacturer: LabChemShelf Life (months): 12, , UN Number: UN1761 (1 per EA)Learn Morewas $417.00 Special Price $312.75 - Acetic Acid 20% V/V (1+4), 4L, Poly BottleSKU: LC102104-EAManufacturer: LabChemShelf Life (months): 24, Traceable to NIST, UN Number: UN2790 (1 per EA)Learn Morewas $116.50 Special Price $87.37
- Titanium Alloy Etchant GE B, 500.00 mL Poly naturalSKU: CT145000-500A-EAManufacturer: Reagents IncTitanium Alloy Etchant GE B, 500.00 mL Poly natural (1 per EA )Learn Morewas $138.00 Special Price $106.16
- Sodium Acetate Buffer, pH 6.0, 10.00 L CubitainerSKU: CS123500-10F-EAManufacturer: Reagents IncSodium Acetate Buffer, pH 6.0, 10.00 L Cubitainer (1 per EA )Learn Morewas $381.00 Special Price $286.20
- Perchloric Acid TS - 500mLSKU: TS14196-500ml-EAManufacturer: Dawn ScientificPerchloric Acid TS - 500mL (1 per EA )Learn Morewas $94.62 Special Price $92.25
-
Buffer Solution, pH 1.68 +/- 0.02 @ 25 DEG C, Reference Standard, 500mLSKU: B-220-500ML-CSManufacturer: Spectrum ChemicalBuffer Solution, pH 1.68 +/- 0.02 @ 25 DEG C, Reference Standard is an inorganic solution in water. 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. (6 per CS )Learn Morewas $363.30 Special Price $295.61 -
Sodium Hypochlorite, Solution, 12 Percent Available Chlorine, Reagent, 4L, CAS# 7681-52-9SKU: S1316-4LT-CSManufacturer: Spectrum ChemicalSodium Hypochlorite, Solution, 12 Percent Available Chlorine, Reagent - The Reagent grade denotes that this chemical is the highest quality commercially available and that the American Chemical Society has not officially set any specifications for this material. Spectrum Chemical manufactured Reagent grade products meet the toughest regulatory standards for quality and purity. (4 per CS )Learn Morewas $1,325.95 Special Price $784.67 - Nitric Acid, 2.70 N, 500.00 mL Glass amberSKU: CN095000-500C-EAManufacturer: Reagents IncNitric Acid, 2.70 N, 500.00 mL Glass amber (1 per EA )Learn Morewas $50.00 Special Price $37.80
- Sodium Chloride, 5% w/v ASTM, 200.00 L DrumSKU: CS124500-200E-EAManufacturer: Reagents IncSodium Chloride, 5% w/v ASTM, 200.00 L Drum (1 per EA )Learn Morewas $866.00 Special Price $649.08
-
Sodium Hydroxide, 1.0 N 100 ML , Ea/1SKU: 531520-EAManufacturer: Lovibond Tintometer GroupDirect Replacement for Hach P/N 104542. Lovibond VARIO Sodium Hydroxide, 1 N, 100 ml (1 per EA)Learn More$26.70 -
Potassium Permanganate, 0.1N (0.02M), 500ML, Amber GlassSKU: LC199801-EAManufacturer: LabChemShelf Life (months): 12, Traceable to NIST, UN Number: (1 per EA)Learn Morewas $31.50 Special Price $23.63
Filter
Shopping Options
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
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