pH Paper and Buffers

Hamilton™ DuraCal™ 7.00 Value pH Buffer

HAM BUFFER ph7 3X500ML *36 238918

Thermo Scientific™ Orion™ pH Buffer Bottles

Perform accurate, reproducible pH calibrations with color-coded Thermo Scientific™ Orion™ pH Buffer Bottles. X5 PH 6.86 BUFFER 60 ML S

Buffer Solution, pH 10, ACROS Organics™

2.5LT Buffer solution pH 10, Carbonate buffer

Fisherbrand™ Traceable™ One-Shot pH Buffer Standards (CRM)

Provides the most accurate pH standards available anywhere. Fisherbrand™ Traceable™ One-Shot pH Buffer Standards (CRM) is 100% compatible with all makes and instruments. Traceable CRM pH Asst Pack, One-Shot

Hamilton™ DuraCal™ 4.01 Value pH Buffer

500ML DURACAL pH 4.01

Hamilton™ DuraCal™ 2.00 Value pH Buffer

Duracal Buffer pH 2.00, 500 ml

Hamilton™ DuraCal™ 4.01 Value pH Buffer

HAM BUFFER PH4 (VE=3X500ML) *34 238917

pH 3.776 DIN 19266 Buffer Solution at 25°C, Reagecon

Tested, certified, NIST traceable, and shelf-stable buffer solution. Buffer Standard Solution PH 3.776@ 25oC

Hamilton™ DuraCal™ 9.21 Value pH Buffer

500ML DURACAL pH 9.21

GE Healthcare Whatman™ pH Indicators Integral Comparison Strips

Used for rapid determination of pH values X200 PH INDIC 9.5-12.0 11X100MM

Hach Lange™ pH Buffer Standard Solutions pH 10.012

500ML BUFFER, IUPACpH10.012 at 25°C

Thermo Scientific™ Orion™ pH Buffer Individual Use Pouches

Ensure fresh, ready to use standards for pH calibration with Thermo Scientific™ Orion™ pH Buffer Individual Use Pouches. X25 Buffer sachet PerpHect pH4 (Pack of 25)

Alfa Aesar™ Glycylglycine, 0.2M buffer soln., pH 8.0

CAS: 556-50-3 Molecular Formula: C4H8N2O3 Molecular Weight (g/mol): 132.119 MDL Number: MFCD00008130 InChI Key: YMAWOPBAYDPSLA-UHFFFAOYSA-N PubChem CID: 11163 ChEBI: CHEBI:17201 IUPAC Name: 2-[(2-aminoacetyl)amino]acetic acid SMILES: C(C(=O)NCC(=O)O)N 100ML Glycylglycine, 0.2M buffer soln., pH 8.0 100ml

Alfa Aesar™ Sodium borate, 0.5M buffer soln., pH 8.5

CAS: 1330-43-4 MDL Number: MFCD00081185 500ML Sodium borate, 0.5M buffer soln., pH 8.5 500ml

Alfa Aesar™ Borate, 0.5M buffer soln., pH 9.5

CAS: 1330-43-4 MDL Number: MFCD00163147 250ML Borate, 0.5M buffer soln., pH 9.5 250ml

Alfa Aesar™ Sodium bicarbonate, 1M buffer soln., pH 10.0

CAS: 144-55-8 Molecular Formula: CHNaO3 Molecular Weight (g/mol): 84.006 MDL Number: MFCD00003528 InChI Key: UIIMBOGNXHQVGW-UHFFFAOYSA-M PubChem CID: 516892 ChEBI: CHEBI:32139 IUPAC Name: sodium;hydrogen carbonate SMILES: C(=O)(O)[O-].[Na+] 250ML Sodium bicarbonate, 1M buffer soln., pH 10.0 250ml

Thermo Scientific™ Orion™ pH Buffer Cubitainers™

Hold 5 gallons (19L) of pH buffer in color-coded Thermo Scientific™ Orion™ pH Buffer Cubitainers™ with easy-pour spigot. PH 7.00 BUFFER CUBITAINER 19L

Alfa Aesar™ Sodium phosphate, 0.5M buffer soln., pH 9.0

500ML Sodium phosphate, 0.5M buffer soln., pH 9.0 500ml

Fisherbrand™ ISE Reference Solutions

ISE reference solution, ideal for use with robust, reliable refillable double junction ISE electrodes. POTASSIUM CHLORIDE 4M 125ML

Alfa Aesar™ Sodium phosphate, 0.5M buffer soln., pH 8.5

500ML Sodium phosphate, 0.5M buffer soln., pH 8.5 500ml

Alfa Aesar™ ColorpHast™ Narrow pH Strips

COLORPHAST PH STRIPS 0- 2.5 PH RANGE 1UNIT

Sodium phosphate, 0.2M buffer soln., pH 7.4, Alfa Aesar™

1LT Sodium phosphate, 0.2M buffer soln., pH 7.4 1l

Alfa Aesar™ Succinate, 0.2M buffer soln., pH 6.5

CAS: 150-90-3 Molecular Formula: C4H4Na2O4 Molecular Weight (g/mol): 162.052 MDL Number: MFCD00002789 InChI Key: ZDQYSKICYIVCPN-UHFFFAOYSA-L PubChem CID: 9020 ChEBI: CHEBI:63675 IUPAC Name: disodium;butanedioate SMILES: C(CC(=O)[O-])C(=O)[O-].[Na+].[Na+] 250ML Succinate, 0.2M buffer soln., pH 6.5 250ml

Alfa Aesar™ ColorpHast™ Intermediate pH Strips

COLORPHAST PH STRIPS 7.5- 14 PH RANGE 1UNIT

Alfa Aesar™ Sodium phosphate, 0.2M buffer soln., pH 7.6

1LT Sodium phosphate, 0.2M buffer soln., pH 7.6 1l

Alfa Aesar™ Sodium citrate, 0.5M buffer soln., pH 6.5

500ML Sodium citrate, 0.5M buffer soln., pH 6.5 500ml

Acetate Buffer Solution, Fisher Chemical™

1000 ML Acetate buffer solution, pH 4.6 EU Pharmacopoeia Grade 1000mL

Alfa Aesar™ Sodium bicarbonate, 1M buffer soln., pH 9.4

CAS: 144-55-8 Molecular Formula: CHNaO3 Molecular Weight (g/mol): 84.006 MDL Number: MFCD00003528 InChI Key: UIIMBOGNXHQVGW-UHFFFAOYSA-M PubChem CID: 516892 ChEBI: CHEBI:32139 IUPAC Name: sodium;hydrogen carbonate SMILES: C(=O)(O)[O-].[Na+] 250ML Sodium bicarbonate, 1M buffer soln., pH 9.4 250ml

Alfa Aesar™ Bicarbonate, 1M buffer soln., pH 9.0

CAS: 144-55-8 Molecular Formula: CHNaO3 Molecular Weight (g/mol): 84.006 MDL Number: MFCD00003528 InChI Key: UIIMBOGNXHQVGW-UHFFFAOYSA-M PubChem CID: 516892 ChEBI: CHEBI:32139 IUPAC Name: sodium;hydrogen carbonate SMILES: C(=O)(O)[O-].[Na+] 250ML Bicarbonate, 1M buffer soln., pH 9.0 250ml

Alfa Aesar™ TEA, 0.2M buffer soln., pH 8.0

CAS: 102-71-6 Molecular Formula: C6H15NO3 Molecular Weight (g/mol): 149.19 MDL Number: MFCD00002855 InChI Key: GSEJCLTVZPLZKY-UHFFFAOYSA-N Synonym: Triethanolamine buffer solution PubChem CID: 7618 ChEBI: CHEBI:28621 IUPAC Name: 2-[bis(2-hydroxyethyl)amino]ethanol SMILES: C(CO)N(CCO)CCO 500ML TEA, 0.2M buffer soln., pH 8.0 500ml

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pH papers, pH strips, pH sticks and pH test kits are used in laboratory, industrial and educational environments to qualitatively assess pH levels or monitor acid-base titrations in a range of sample types. pH buffer reference standards are used for the accurate calibration of pH meters and monitors for far more precise and quantitative pH measurement.

pH test papers are supplied either as rolls, tear-off strips, or sticks. They are impregnated with indicator dyes which change colour when dipped into the solution under test. In some products, the indicator dyes are covalently linked to the cellulose fibres to avoid bleed-out (leaching) and contamination of the test samples. 

Some pH papers indicate simple acid or base conditions with a single red-blue colour change (also called litmus papers). Universal pH papers and strips contain a mix of indicator dyes which cover a range of pH values up to and including 0 to 14 in a single test.  The observed colour change is checked against a comparison chart normally supplied with the papers.

Alternatively, for accurate assessment of pH, standard (reference) pH buffers are manufactured to very high degrees of precision and are used for the quantitative calibration of pH meters, electrodes and other electrochemical sensors. Standard buffers are: 

  • Typically supplied at fixed values of pH4.01, pH7.00 and pH10.01
  • May be colour-coded for easy and quick identification 
  • Certified to their nominal pH and accuracy at a specified temperature (typically 20°C)
  • Supplied as ready-to-use solutions or concentrates
  • Contain antifungals for extended shelf life
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