Electrochemistry Buffers

Buffer solutions suitable for use as reference and calibration standards for measuring pH values.

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Mettler Toledo™ Buffer Solutions: Standard pH

Storage and refill solutions for pH electrodes

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Specifications

Includes	Quality inspection certificate
Boiling Point	∼100°C

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Buffer Solution, pH 4.00 (Certified), Fisher Chemical™

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Specifications

CAS	67-56-1
Health Hazard 3	Emergency Overview Contains a known or suspected carcinogen. The toxicological properties have not been fully investigated. Use personal protective equipment. Ensure adequate ventilation. Wash off immediately with plenty of water for at least 15 minutes. Get medical attention immediately if symptoms occur. Rinse immediately with plenty of water, also under the eyelids, for at least 15 minutes. Obtain medical attention. Move to fresh air. If breathing is difficult, give oxygen. Get medical attention immediately if symptoms occur. Do not induce vomiting. Do not induce vomiting. Obtain medical attention. NFPA Health:1 Flammability:0 Instability:0
MDL Number	MFCD00146206
Health Hazard 2	CAUTION!
Color	Undesignated
Traceability to NIST	Traceable to NIST.
Physical Form	Liquid
pH	4.0
Chemical Name or Material	Buffer Solution, pH 4.00
Grade	Certified
Identification	Pass Test
ChemAlert Storage Symbol	Gray
Density	1.0054g/cm³

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Buffer Solution, pH 9.00 (Certified), Fisher Chemical™

Boric Acid/Potassium Chloride/Sodium Hydroxide

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Specifications

Boiling Point	100°C
CAS	7732-18-5
Health Hazard 3	Emergency Overview May cause eye, skin, and respiratory tract irritation. Use personal protective equipment. Ensure adequate ventilation. Wash off immediately with plenty of water for at least 15 minutes. Get medical attention immediately if symptoms occur. Rinse immediately with plenty of water, also under the eyelids, for at least 15 minutes. Obtain medical attention. Move to fresh air. If breathing is difficult, give oxygen. Get medical attention immediately if symptoms occur. Do not induce vomiting. Obtain medical attention. Obtain medical attention. . NFPA Health:1 Flammability:0 Instability:0
MDL Number	MFCD00146206
Health Hazard 2	CAUTION!
Traceability to NIST	Traceable to NIST.
Physical Form	Liquid
pH	9.00
Chemical Name or Material	Buffer Solution, pH 9.00
Grade	Certified
Identification	Pass Test
ChemAlert Storage Symbol	Gray
Melting Point	0°C

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Buffer Solution, pH 3.00 (Certified), Fisher Chemical™

Pricing & Availability
Specifications

Boiling Point	100°C
Color	Undesignated
Traceability to NIST	Traceable to NIST.
Physical Form	Liquid
Chemical Name or Material	Buffer Solution, pH 3.00
Grade	Certified
Identification	Pass Test
ChemAlert Storage Symbol	Gray
Density	0.7g/cm³
CAS	7732-18-5
Health Hazard 3	Emergency Overview May cause eye, skin, and respiratory tract irritation. The toxicological properties have not been fully investigated. Use personal protective equipment. Ensure adequate ventilation. Wash off immediately with plenty of water for at least 15 minutes. Get medical attention immediately if symptoms occur. Rinse immediately with plenty of water, also under the eyelids, for at least 15 minutes. Obtain medical attention. Move to fresh air. If breathing is difficult, give oxygen. Get medical attention immediately if symptoms occur. Do not induce vomiting. Do not induce vomiting. Obtain medical attention. NFPA Health:1 Flammability:0 Instability:0
MDL Number	MFCD00146206
Health Hazard 2	CAUTION!
pH	3.00
Melting Point	0°C

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Buffer Solution, pH 10.00 (Certified), Fisher Chemical™

Potassium Carbonate/Potassium Tetraborate/Potassium Hydroxide/Disodium EDTA Dihydrate

Pricing & Availability
Specifications

CAS	12228-88-5
Health Hazard 3	Emergency Overview May cause eye, skin, and respiratory tract irritation. Handle in accordance with good industrial hygiene and safety practice. Wear personal protective equipment. Wash off immediately with plenty of water for at least 15 minutes. Get medical attention immediately if symptoms occur. Rinse immediately with plenty of water, also under the eyelids, for at least 15 minutes. Obtain medical attention. Move to fresh air. If breathing is difficult, give oxygen. Get medical attention immediately if symptoms occur. Do not induce vomiting. Obtain medical attention. Obtain medical attention. . NFPA Health:1 Flammability:0 Instability:0
MDL Number	MFCD00146206
Health Hazard 2	CAUTION!
Color	Colorless
Traceability to NIST	Traceable to NIST.
Physical Form	Liquid
pH	10
Chemical Name or Material	Buffer Solution, pH 10.00
Grade	Certified
Identification	Pass Test
ChemAlert Storage Symbol	Gray

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Buffer Solution, pH 7.40 (Certified), Fisher Chemical™

Potassium Phosphate Monobasic/Sodium Hydroxide

Pricing & Availability
Specifications

Boiling Point	100°C
CAS	7732-18-5
MDL Number	MFCD00134130
Traceability to NIST	Traceable to NIST.
Packaging	Poly Bottle
Physical Form	Liquid
pH	7.4
Chemical Name or Material	Buffer Solution, pH 7.40
Grade	Certified
Identification	Pass Test
ChemAlert Storage Symbol	Gray
Density	1.0g/cm³
Melting Point	0°C

Mettler Toledo™ NIST/DIN pH Buffer Solution Sachets

Offers the highest possible pH precision. Mettler Toledo™ NIST/DIN pH Buffer Solution Sachets are specified to three decimal places and come with a printed certificate that guarantees traceability. Individual packets guarantee fresh solution for every calibration, as well as maximum ease of use.

Pricing & Availability
Specifications

For Use With (Equipment)	pH Electrode

Buffer Solution pH 4.0 at 25°C, Certified, LabChem™

Pricing & Availability
Specifications

Linear Formula	KHC₈H₄O₄
Color	Colorless
Traceability to NIST	Traceable to NIST
Physical Form	Liquid
Chemical Name or Material	Buffer Solution pH 4.0 at 25°C
Grade	Certified
Identification	Passes Test
Density	1g/mL
CAS	67-56-1
Health Hazard 3	GHS P Statement If in contact with skin or eyes, rinse thoroughly with water for 15-20 minutes. If swallowed, get medical attention.
Decomposition Information	Formaldehyde; Carbon monoxide; Carbon dioxide
Health Hazard 2	GHS H Statement Solution is not hazardous.
Solubility Information	Soluble in water
pH	4.00 to 4.01
Recommended Storage	Room Temperature
Formula Weight	204.23
Specific Gravity	1g/mL
CAS Max %	0.005

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Buffer Solution, pH 7.00, Color-Coded Yellow (Certified), Fisher Chemical™

CAS: 7778-77-0

Pricing & Availability
Specifications

Boiling Point	100°C
Description	Potassium Phosphate Monobasic/Sodium Hydroxide. pH/temperature conversions given on label.
Color	Yellow
Traceability to NIST	Traceable to NIST.
Physical Form	Liquid
Chemical Name or Material	Buffer Solution, pH 7.00, Color-Coded Yellow
Grade	Certified
Identification	Pass Test
ChemAlert Storage Symbol	Gray
Density	1.0g/cm³
Vapor Pressure	760mmHg at 20°C
Absorbance	Pass Test
CAS	1934-21-0
Health Hazard 3	Emergency Overview May cause eye, skin, and respiratory tract irritation. Handle in accordance with good industrial hygiene and safety practice. Wash off immediately with plenty of water for at least 15 minutes. Get medical attention immediately if symptoms occur. Rinse immediately with plenty of water, also under the eyelids, for at least 15 minutes. Obtain medical attention. Move to fresh air. If breathing is difficult, give oxygen. Get medical attention immediately if symptoms occur. Do not induce vomiting. Obtain medical attention. . . NFPA Health:1 Flammability:0 Instability:0
MDL Number	MFCD00134130
Health Hazard 2	CAUTION!
Solubility Information	Soluble in water
pH	7.00
Specific Gravity	1
Melting Point	0°C

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Buffer Solution, pH 10.00, Color-Coded Blue (Certified), Fisher Chemical™

Pricing & Availability
Specifications

Boiling Point	100°C
Color	Blue
Traceability to NIST	Traceable to NIST.
Physical Form	Liquid
Chemical Name or Material	Buffer Solution, pH 10.00, Color-Coded Blue
Grade	Certified
Identification	Pass Test
ChemAlert Storage Symbol	Gray
Absorbance	Pass Test
CAS	1310-58-3
Health Hazard 3	Emergency Overview May cause eye, skin, and respiratory tract irritation. Use personal protective equipment. Ensure adequate ventilation. Wash off immediately with plenty of water for at least 15 minutes. Get medical attention immediately if symptoms occur. Rinse immediately with plenty of water, also under the eyelids, for at least 15 minutes. Obtain medical attention. Move to fresh air. If breathing is difficult, give oxygen. Get medical attention immediately if symptoms occur. Do not induce vomiting. Obtain medical attention. Obtain medical attention. . NFPA Health:1 Flammability:0 Instability:0
MDL Number	MFCD00146206
Health Hazard 2	CAUTION!
pH	10.0
Specific Gravity	1.013 at 25°C
Melting Point	0°C

Buffer Solution pH 1.68 at 25°C, Certified, LabChem™

Pricing & Availability
Specifications

Linear Formula	HO₂CCO₂H
Color	Colorless
Traceability to NIST	Traceable to NIST
Physical Form	Liquid
Chemical Name or Material	Buffer Solution pH 1.68 at 25°C
Grade	Certified
Identification	Passes Test
Density	1g/mL
CAS	1310-58-3
Decomposition Information	Potassium oxide; Carbon monoxide; Carbon dioxide; Thermal decomposition generates: Corrosive vapors
Health Hazard 2	GHS H Statement Causes severe skin burns and eye damage.
Solubility Information	Soluble in water
Packaging	Poly Bottle
pH	1.68 ±0.01
Health Hazard 1	Danger
Recommended Storage	Room Temperature
Formula Weight	90.04
Specific Gravity	1g/mL
CAS Max %	0.19

Thermo Scientific™ Orion™ Pure Water™ pH Buffers and pHISA™ Adjustor

Sample well, rain, distilled/deionized, boiler feed and process waters with this adjustor.

Pricing & Availability
Specifications

For Use With (Equipment)	pH Meter and Electrode
For Use With (Application)	Provide fast, accurate pH results in high purity and low ionic strength waters. Recommended for samples such as well water, rain water, distilled/deionized water, boiler feed water and process water.

Buffer Solution pH 4.0 at 25°C, Color Coded Red, Certified, LabChem™

Pricing & Availability
Specifications

Linear Formula	KHC₈H₄O₄
Color	Red
Traceability to NIST	Traceable to NIST
Physical Form	Liquid
Chemical Name or Material	Buffer Solution pH 4.0 at 25°C
Grade	Certified
Identification	Passes Test
Density	1g/mL
Name Note	Color Coded Red
CAS	67-56-1
Health Hazard 3	GHS P Statement If in contact with skin or eyes, rinse thoroughly with water for 15-20 minutes. If swallowed, get medical attention.
Decomposition Information	Formaldehyde; Carbon monoxide; Carbon dioxide
Health Hazard 2	GHS H Statement Solution is not hazardous.
Solubility Information	Soluble in water
pH	4.00 to 4.01
Recommended Storage	Room Temperature
Formula Weight	204.23
Specific Gravity	1g/mL
CAS Max %	0.005

Buffer Solution pH 7.0 at 25°C, Color Coded Yellow, Certified, LabChem™

Pricing & Availability
Specifications

Linear Formula	KH₂PO₄
Color	Yellow
Traceability to NIST	Traceable to NIST
Physical Form	Liquid
Chemical Name or Material	Buffer Solution pH 7.0 at 25°C
Grade	Certified
Identification	Passes Test
Name Note	Color Coded Yellow
CAS	1310-73-2
Health Hazard 3	GHS P Statement If in contact with skin or eyes, rinse thoroughly with water for 15-20 minutes. If swallowed, get medical attention.
Decomposition Information	Phosphorus oxides; Sodium oxide
Health Hazard 2	GHS H Statement Solution is not hazardous.
Solubility Information	Soluble in water
pH	7.00 ±0.01
Recommended Storage	Room Temperature
Formula Weight	136.09
CAS Max %	0.08

Buffer Solution, pH 7.00, Color-Coded Green, Mettler Toledo™

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Electrochemistry Buffers

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Mettler Toledo™ Buffer Solutions: Standard pH Greener ChoiceOffers one or more environmental benefits itemized in the U.S. FTC “Green Guides.”Learn More

Buffer Solution, pH 4.00 (Certified), Fisher Chemical™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer Solution, pH 9.00 (Certified), Fisher Chemical™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer Solution, pH 3.00 (Certified), Fisher Chemical™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer Solution, pH 10.00 (Certified), Fisher Chemical™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer Solution, pH 7.40 (Certified), Fisher Chemical™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Mettler Toledo™ NIST/DIN pH Buffer Solution Sachets Greener ChoiceOffers one or more environmental benefits itemized in the U.S. FTC “Green Guides.”Learn More

Buffer Solution pH 4.0 at 25°C, Certified, LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer Solution, pH 7.00, Color-Coded Yellow (Certified), Fisher Chemical™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer Solution, pH 10.00, Color-Coded Blue (Certified), Fisher Chemical™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer Solution pH 4.0 at 25°C, Color Coded Red, Certified, LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer Solution pH 7.0 at 25°C, Color Coded Yellow, Certified, LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer Solution, pH 7.00, Color-Coded Green, Mettler Toledo™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Mettler Toledo™ Buffer Solutions: Standard pH

Buffer Solution, pH 4.00 (Certified), Fisher Chemical™

Buffer Solution, pH 9.00 (Certified), Fisher Chemical™

Buffer Solution, pH 3.00 (Certified), Fisher Chemical™

Buffer Solution, pH 10.00 (Certified), Fisher Chemical™

Buffer Solution, pH 7.40 (Certified), Fisher Chemical™

Mettler Toledo™ NIST/DIN pH Buffer Solution Sachets

Buffer Solution pH 4.0 at 25°C, Certified, LabChem™

Buffer Solution, pH 7.00, Color-Coded Yellow (Certified), Fisher Chemical™

Buffer Solution, pH 10.00, Color-Coded Blue (Certified), Fisher Chemical™

Buffer Solution pH 4.0 at 25°C, Color Coded Red, Certified, LabChem™

Buffer Solution pH 7.0 at 25°C, Color Coded Yellow, Certified, LabChem™

Buffer Solution, pH 7.00, Color-Coded Green, Mettler Toledo™