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
-
Ceric Ammonium Sulfate, 0.1 Normal, 1 L, PolySKU: C1015-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsN/10 (0.1 M); in 2 N Sulfuric Acid (1 per EA)Learn More$56.05 -
Cupric Sulfate, 0.016 Molar, 1 L, PolySKU: C1016-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsCupric Sulfate, 0.016 Molar, 1 L, Poly (1 per EA)Learn More$17.80 - Crystal Violet, 0.5% w/v Solution, 3.8 LSKU: C1018-3.8L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsGram Stain Solution #1; Hucker Formula (1 per EA)Learn More$53.85
- Cupric Sulfate, 5% w/v Solution, 3.8 L, Poly GallonSKU: C1023-3.8L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsCupric Sulfate, 5% w/v Solution, 3.8 L, Poly Gallon (1 per EA)Learn More$50.85
- Cresolphthalein (o-), 0.04% w/v in Denatured Ethanol, 1 LSKU: C1027-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentspH 8.2 (colorless) - pH 9.8 (violet) (1 per EA)Learn More$35.95
-
Ferrous Ammonium Sulfate Solution, 1 L, Amber GlassSKU: CF1195-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsFerrous Ammonium Sulfate Solution, 1 L, Amber Glass (1 per EA )Learn More$52.95 - Diphenylcarbazide, 0.5% w/v in Acetone, 100 mLSKU: D1005-100mL-EAManufacturer: 710 Spirits Rocky Mtn ReagentsChromium; Standard Methods; 90 Day Stability (1 per EA)Learn More$42.45
- Eosin Y, 1% w/v Solution, 1 LSKU: E1002-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsEosin Y, 1% w/v Solution, 1 L (1 per EA)Learn More$21.60
- Eosin Y, 1% w/v Solution, 500 mLSKU: E1002-500mL-EAManufacturer: 710 Spirits Rocky Mtn ReagentsEosin Y, 1% w/v Solution, 500 mL (1 per EA)Learn More$18.55
-
Formaldehyde, Technical, CAS# 50-00-0SKU: F1011-16oz-EAManufacturer: 710 Spirits Rocky Mtn ReagentsAssay: 37% Minimum; Stabalized with Methanol (1 per EA)Learn More$12.40 - Hydrochloric Acid, 0.02 Normal, 1 L, PolySKU: H1000-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsN/100 (0.02 M) (1 per EA)Learn More$20.95
- Hydrochloric Acid, 0.02 Normal, 3.8 L, Poly GallonSKU: H1000-3.8L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsN/100 (0.02 M) (1 per EA)Learn More$36.95
- Hydrochloric Acid, 20% v/v Solution, 1 LSKU: H1007-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsHydrochloric Acid, 20% v/v Solution, 1 L (1 per EA)Learn More$24.05
- Hydrochloric Acid, 20% v/v Solution, 3.8 LSKU: H1007-3.8L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsHydrochloric Acid, 20% v/v Solution, 3.8 L (1 per EA)Learn More$48.35
- Hydrochloric Acid, 0.1 Normal, 3.8 L, PolySKU: H1008-3.8L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsN/10 (0.1 M) (1 per EA)Learn More$36.45
- Hydrochloric Acid, 2.5 Normal, 3.8 L, Poly GallonSKU: H1011-3.8L-EAManufacturer: 710 Spirits Rocky Mtn Reagents(2.5 M) (1 per EA)Learn More$52.60
- Hydrochloric Acid, 5 Normal, 1 L, PolySKU: H1012-1L-EAManufacturer: 710 Spirits Rocky Mtn Reagents(5 M) (1 per EA)Learn More$32.85
- Hydrochloric Acid, 6 Normal, 1 L, PolySKU: H1013-1L-EAManufacturer: 710 Spirits Rocky Mtn Reagents(6 M) (1 per EA)Learn More$33.80
- Hydrochloric Acid, 25% v/v Solution, 1 LSKU: H1015-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsHydrochloric Acid, 25% v/v Solution, 1 L (1 per EA)Learn More$25.45
- Hydrochloric Acid, 0.05 Normal, 1 L, PolySKU: H1019-1L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsN/20 (0.05 M) (1 per EA)Learn More$21.00
- Hydrochloric Acid, 0.05 Normal, 3.8 L, Poly GallonSKU: H1019-3.8L-EAManufacturer: 710 Spirits Rocky Mtn ReagentsN/20 (0.05 M) (1 per EA)Learn More$37.20
- Loeffler's Methylene Blue, 940 mLSKU: L1002-940mL-EAManufacturer: 710 Spirits Rocky Mtn ReagentsAcid Fast Stain (1 per EA)Learn More$22.05
- Methyl Orange Indicator, 0.05% w/v Aqueous, 120 mLSKU: M1010-120mL-EAManufacturer: 710 Spirits Rocky Mtn ReagentspH 3.0 (red) - pH 4.4 (yellow) (1 per EA)Learn More$14.80
- Methyl Orange Indicator, 0.05% w/v Aqueous, 500 mLSKU: M1010-500mL-EAManufacturer: 710 Spirits Rocky Mtn ReagentspH 3.0 (red) - pH 4.4 (yellow) (1 per EA)Learn More$18.40
- Manufacturer 710 Spirits Rocky Mtn Reagents 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