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
-
Slide, Chlorine OT, 0-50 ppmSKU: 5154-EAManufacturer: Taylor TechnologiesSlide, Chlorine OT, 0-50 ppm (1 per EA )Learn Morewas $0.91 Special Price $0.82 -
PAGE, 4 Percent Solution, Electrophoresis GradeSKU: P1031-100ML-EAManufacturer: Spectrum ChemicalPAGE, 4 Percent Solution, Electrophoresis Grade (1 per EA )Learn More$166.40 - Sulfuric Acid, 40 Percent (v/v) Solution, 4L, CAS# 7664-93-9SKU: S-728-4LTPL-EAManufacturer: Spectrum ChemicalSulfuric Acid, 40 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 $139.05 Special Price $113.15
- Silver Nitrate, SVS Concentrate, To Prepare 0.0141 N Solution, 1UNIT, CAS# 7761-88-8SKU: SV195-1UNIT-CSManufacturer: Spectrum ChemicalSilver Nitrate, SVS Concentrate, To Prepare 0.0141 N Solution - Spectrum's Standard Volumetric Solution (SVS) concentrate when diluted to 1 liter will yield a 0.0141 N solution. Simply dilute the desired Standard Volumetric Solution concentrate to the specified volume (carefully following instructions provided with the package) and the resulting solution will have an exact Normality within 0.1%. Spectrum Standard Volumetric Solution concentrates are relied upon for fast, accurate results in life sciences and pharmaceutical quality control applications. (6 per CS )Learn More$740.20
-
Buffer pH 7.00 Clear, 10.00 L CubitainerSKU: C2156010-10F-EAManufacturer: Reagents IncBuffer pH 7.00 Clear, 10.00 L Cubitainer (1 per EA )Learn Morewas $139.00 Special Price $104.76 -
Sodium Hypochlorite 12.5-15% - 1L (Pack of 4)Manufacturer: Dawn ScientificSodium Hypochlorite 12.5-15% - 1L (Pack of 4) (4 per PK )Learn Morewas $149.62 Special Price $145.88 - Fehling solution A TS - 500mLSKU: TS14412-500mL-EAManufacturer: Dawn ScientificFehling solution A TS - 500mL (1 per EA )Learn Morewas $25.62 Special Price $24.98
-
Sodium Hydroxide, 2 N Aqueous Solution, 1L, CAS# 1310-73-2SKU: S-375-1LT-EAManufacturer: Spectrum ChemicalSodium Hydroxide, 2 N Aqueous Solution is a highly caustic metallic base combined with alkali salt. 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. (1 per EA )Learn Morewas $77.80 Special Price $63.31 -
Vario Dpd Total, F10 100 Pack, Ea/1SKU: 530190-EAManufacturer: Lovibond Tintometer GroupDirect Replacement for Hach P/N 2105669. (1 per EA )Learn More$25.06 - Sodium Thiosulfate, 0.0282 N, 10.00 L CubitainerSKU: CS137100-10F-EAManufacturer: Reagents IncSodium Thiosulfate, 0.0282 N, 10.00 L Cubitainer (1 per EA )Learn Morewas $144.00 Special Price $108.00
- Ammonium Hydroxide, 10%w/w NH3, 10.00 L CubitainerSKU: CA019800-10F-EAManufacturer: Reagents IncAmmonium Hydroxide, 10%w/w NH3, 10.00 L Cubitainer (1 per EA )Learn Morewas $246.00 Special Price $184.68
- Sodium Thiosulfate, 0.01 N, 4.00 L Glass amberSKU: CS000100-4C-EAManufacturer: Reagents IncSodium Thiosulfate, 0.01 N, 4.00 L Glass amber (1 per EA )Learn Morewas $108.00 Special Price $81.00
- Potassium Hydroxide, 0.25 N, 20.00 L CubitainerSKU: CP199600-20F-EAManufacturer: Reagents IncPotassium Hydroxide, 0.25 N, 20.00 L Cubitainer (1 per EA )Learn Morewas $299.00 Special Price $224.64
- Perchloric Acid, 0.1 N / GAA, 1.00 L Glass amberSKU: CP120300-1C-EAManufacturer: Reagents IncPerchloric Acid, 0.1 N / GAA, 1.00 L Glass amber (1 per EA )Learn Morewas $114.00 Special Price $85.32
- Silver Nitrate, 0.282 N, 500.00 mL Glass amberSKU: CS150800-500C-EAManufacturer: Reagents IncSilver Nitrate, 0.282 N, 500.00 mL Glass amber (1 per EA )Learn Morewas $336.00 Special Price $251.64
- Sod Diphenylaminesulfonate Sol, 1.00 L Poly naturalSKU: CS006000-1A-EAManufacturer: Reagents IncSod Diphenylaminesulfonate Sol, 1.00 L Poly natural (1 per EA )Learn Morewas $274.00 Special Price $205.20
- EDTA Titrant, 0.2 M, 20.00 L CubitainerSKU: CE250900-20F-EAManufacturer: Reagents IncEDTA Titrant, 0.2 M, 20.00 L Cubitainer (1 per EA )Learn Morewas $754.00 Special Price $565.92
- Sodium Hydroxide, 10% w/w, 1.00 L Poly naturalSKU: CS155600-1A-EAManufacturer: Reagents IncSodium Hydroxide, 10% w/w, 1.00 L Poly natural (1 per EA )Learn Morewas $60.00 Special Price $45.36
- Sodium Hydroxide, 25% w/v, 20.00 L CubitainerSKU: C7550X00-20F-EAManufacturer: Reagents IncSodium Hydroxide, 25% w/v, 20.00 L Cubitainer (1 per EA )Learn Morewas $311.00 Special Price $233.28
- Sodium Hydroxide, 0.3333 N, 4.00 L CubitainerSKU: CS131400-4F-EAManufacturer: Reagents IncSodium Hydroxide, 0.3333 N, 4.00 L Cubitainer (1 per EA )Learn Morewas $78.00 Special Price $58.32
- Barium Chloride, 2 N (1 M), 10.00 L CubitainerSKU: CB115300-10F-EAManufacturer: Reagents IncBarium Chloride, 2 N (1 M), 10.00 L Cubitainer (1 per EA )Learn Morewas $398.00 Special Price $298.08
- Mixed Acid Solution, 2.50 L Glass clearSKU: CM126600-2.5D1-EAManufacturer: Reagents IncMixed Acid Solution, 2.50 L Glass clear (1 per EA )Learn Morewas $128.00 Special Price $96.12
- Sulfuric Acid, 12 N, 4.00 L Poly naturalSKU: CS107800-4A-EAManufacturer: Reagents IncSulfuric Acid, 12 N, 4.00 L Poly natural (1 per EA )Learn Morewas $295.00 Special Price $221.40
- Hardness Buffer w/Sulfide, 4.00 L Black polySKU: CH115700-4BP-EAManufacturer: Reagents IncHardness Buffer w/Sulfide, 4.00 L Black poly (1 per EA )Learn Morewas $299.00 Special Price $224.64
Filter
Shopping Options
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
LPS 200uL Universal Pipet Tips, Yellow, Bulk, PK1000
was $20.00 Special Price $15.75
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