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
-
p-Naphtholbenzein Indicator, 1.00 L Glass amberSKU: CN002800-1C-EAManufacturer: Reagents Incp-Naphtholbenzein Indicator, 1.00 L Glass amber (1 per EA )Learn Morewas $54.00 Special Price $41.04 - Sulfuric Acid, 70% v/v, 500.00 mL Poly naturalSKU: CS202200-500A-EAManufacturer: Reagents IncSulfuric Acid, 70% v/v, 500.00 mL Poly natural (1 per EA )Learn Morewas $105.00 Special Price $78.84
- Phosphate Buffer, pH 7.2, BOD, 4.00 L Poly naturalSKU: C7271150-4A-EAManufacturer: Reagents IncPhosphate Buffer, pH 7.2, BOD, 4.00 L Poly natural (1 per EA )Learn Morewas $191.00 Special Price $143.64
- Sodium Hydroxide, 0.3333 N, 20.00 L Winpak blueSKU: CS131400-20E7-EAManufacturer: Reagents IncSodium Hydroxide, 0.3333 N, 20.00 L Winpak blue (1 per EA )Learn Morewas $199.00 Special Price $149.04
- Potassium Ferrocyanide 10% w/v, 500.00 mL Poly naturalSKU: CP170000-500A-EAManufacturer: Reagents IncPotassium Ferrocyanide 10% w/v, 500.00 mL Poly natural (1 per EA )Learn Morewas $108.00 Special Price $81.00
- Hydrochloric Acid Tech 20°Be, 20.00 L Winpak blueSKU: C5101000-20E7-EAManufacturer: Reagents IncHydrochloric Acid Tech 20°Be, 20.00 L Winpak blue (1 per EA )Learn Morewas $285.00 Special Price $213.84
- Lead Perchlorate, 0.1 M, 1.00 L Glass amberSKU: CL173000-1C-EAManufacturer: Reagents IncLead Perchlorate, 0.1 M, 1.00 L Glass amber (1 per EA )Learn Morewas $169.00 Special Price $126.36
- Citric Acid, 10% w/v, 4.00 L Poly naturalSKU: CC204100-4A-EAManufacturer: Reagents IncCitric Acid, 10% w/v, 4.00 L Poly natural (1 per EA )Learn Morewas $201.00 Special Price $151.20
- Sod Tetraphenylboron, 0.005M U, 1.00 L Glass amberSKU: CS138000-1C-EAManufacturer: Reagents IncSod Tetraphenylboron, 0.005M U, 1.00 L Glass amber (1 per EA )Learn Morewas $96.00 Special Price $72.36
- Cyclohexylamine, 0.50 N /MeOH, 1.00 L Glass amberSKU: CC267800-1C-EAManufacturer: Reagents IncCyclohexylamine, 0.50 N /MeOH, 1.00 L Glass amber (1 per EA )Learn Morewas $217.00 Special Price $163.08
- Hydrochloric Acid, 12.5% v/v, 10.00 L CubitainerSKU: CH000700-10F-EAManufacturer: Reagents IncHydrochloric Acid, 12.5% v/v, 10.00 L Cubitainer (1 per EA )Learn Morewas $208.00 Special Price $155.52
- Ferric Chloride, 20% w/w, 1.00 L Poly naturalSKU: CF000400-1A-EAManufacturer: Reagents IncFerric Chloride, 20% w/w, 1.00 L Poly natural (1 per EA )Learn Morewas $198.00 Special Price $149.04
- Sodium Chromate, 2% w/v, 10.00 mL Glass amberSKU: CS144900-10C-EAManufacturer: Reagents IncSodium Chromate, 2% w/v, 10.00 mL Glass amber (1 per EA )Learn Morewas $50.00 Special Price $37.80
- Kit Oil #12, 1.00 L Glass amberSKU: CK197300-1C-EAManufacturer: Reagents IncKit Oil #12, 1.00 L Glass amber (1 per EA )Learn Morewas $75.00 Special Price $56.16
- Pot Acid Phthalate, 0.05 N, 500.00 mL Poly naturalSKU: CP081100-500A-EAManufacturer: Reagents IncPot Acid Phthalate, 0.05 N, 500.00 mL Poly natural (1 per EA )Learn Morewas $72.00 Special Price $54.00
- Ammonium Thiocyanate, 10% w/v, 4.00 L Glass amberSKU: CA100800-4C-EAManufacturer: Reagents IncAmmonium Thiocyanate, 10% w/v, 4.00 L Glass amber (1 per EA )Learn Morewas $280.00 Special Price $209.52
- Potassium EDTA 0.076M, 1.00 L Poly naturalSKU: CP203000-1A-EAManufacturer: Reagents IncPotassium EDTA 0.076M, 1.00 L Poly natural (1 per EA )Learn Morewas $50.00 Special Price $37.80
- Lactic Acid, 10% v/v, 500.00 mL Poly naturalSKU: CL100500-500A-EAManufacturer: Reagents IncLactic Acid, 10% v/v, 500.00 mL Poly natural (1 per EA )Learn Morewas $52.00 Special Price $38.88
- Reagent 2 (Buffer), 10.00 L CubitainerSKU: CR001200-10F-EAManufacturer: Reagents IncReagent 2 (Buffer), 10.00 L Cubitainer (1 per EA )Learn Morewas $493.00 Special Price $369.36
- Buffer, pH 13.00, 4.00 L CubitainerSKU: C2156800-4F-EAManufacturer: Reagents IncBuffer, pH 13.00, 4.00 L Cubitainer (1 per EA )Learn Morewas $100.00 Special Price $74.52
- Sodium Hydroxide, 50% w/w RGT, 1.00 L Poly naturalSKU: C1318600-1A-EAManufacturer: Reagents IncSodium Hydroxide, 50% w/w RGT, 1.00 L Poly natural (1 per EA )Learn Morewas $76.50 Special Price $57.24
- Sodium Hydroxide, 10% w/v, 4.00 L Poly naturalSKU: CS125800-4A-EAManufacturer: Reagents IncSodium Hydroxide, 10% w/v, 4.00 L Poly natural (1 per EA )Learn Morewas $116.00 Special Price $87.48
- Ammonium Thiocyanate, 9% w/v, 4.00 L Poly naturalSKU: CA006600-4A-EAManufacturer: Reagents IncAmmonium Thiocyanate, 9% w/v, 4.00 L Poly natural (1 per EA )Learn Morewas $134.00 Special Price $100.44
- Indicator 1, Bromophenol Blue, 120.00 mL Poly naturalSKU: CI160500-120A-EAManufacturer: Reagents IncIndicator 1, Bromophenol Blue, 120.00 mL Poly natural (1 per EA )Learn Morewas $20.50 Special Price $15.12
- Manufacturer Reagents Inc Remove This Item
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