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Buffers and Standards

Hydrogen ion buffers comprising a mixture of a weak acid and its conjugate base or vice-versa and used to stabilize pH; also diluents, washing solutions, and standard-value solutions used for a broad array of scientific calibration purposes.

The buffers used to calibrate pH meters may be certified and/or traceable to the National Institute of Standards and Technology (NIST). These buffers may also be color-coded for easy identification:

  • Red: pH 4.0
  • Yellow: pH 7.0
  • Blue: pH 10.0

 

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Keyword Search:
1 – 15 of 1,036 results
1
Promotions Available

Buffer Solution, pH 8.00 (Certified), Fisher Chemical™

Potassium Phosphate Monobasic/Sodium Hydroxide

CAS 7732-18-5
Health Hazard 3 Emergency Overview
Irritating to eyes and skin. 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. Obtain medical attention. 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:2
Flammability:0
Instability:0
MDL Number MFCD00147253
Health Hazard 2 WARNING!
Traceability to NIST Traceable to NIST.
Physical Form Liquid
pH 8.0
Chemical Name or Material Buffer Solution, pH 8.00
Grade Certified
Identification Pass Test
ChemAlert Storage Symbol Gray
2
Promotions Available

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

Boric Acid/Potassium Chloride/Sodium Hydroxide

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
3
Promotions Available

Buffer Solution, pH 2.00 (Certified), Fisher Chemical™

Boiling Point 100°C
Color Undesignated
Traceability to NIST Traceable to NIST.
Physical Form Liquid
Chemical Name or Material Buffer Solution, pH 2.00
Grade Certified
Identification In Pass Test
ChemAlert Storage Symbol Gray
Density 1.0g/cm³
CAS 7732-18-5
Health Hazard 3 Emergency Overview
May cause skin, eye, and respiratory tract irritation. The toxicological properties have not been fully investigated. WARNING! This product contains a chemical known in the State of California to
MDL Number MFCD00146206
Health Hazard 2 CAUTION!
pH 2.00
Health Hazard 1 Signal Word: CAUTION!
DOT Information DOT Class 8, : Corrosive
Melting Point 0°C
4
Promotions Available

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

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
5
Promotions Available

Buffer Solution, pH 5.00 (Certified), Fisher Chemical™

Boiling Point 100°C
CAS 7732-18-5
MDL Number MFCD00146206
Traceability to NIST Traceable to NIST.
Packaging Poly Bottle
Physical Form Liquid
pH 5.0
Chemical Name or Material Buffer Solution, pH 5.00
Grade Certified
Identification Pass Test
ChemAlert Storage Symbol Gray
Melting Point 0°C
6
Promotions Available

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

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
7

Thermo Scientific™ Orion™ pH Buffer Bottles

Perform accurate, reproducible pH calibrations with these color-coded buffer bottles.

For Use With (Equipment) pH Meter and Electrode
Traceability to NIST Yes
Physical Form Liquid
Chemical Name or Material pH Buffer, bottles
8
Promotions Available

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

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
10

Buffer solution pH 4, Citrate buffer

CAS: 68-04-2 | C8H5KO4

Name Note Phthalate buffer
CAS 7732-18-5
MDL Number MFCD00130806
Color Colorless
Traceability to NIST Traceable to NIST
Packaging Plastic bottle
Physical Form Liquid
pH 3.98 to 4.02 (20°C)
Chemical Name or Material Buffer solution pH 4
Molecular Formula C8H5KO4
Formula Weight 204.23
11

Buffer solution pH 10, Carbonate buffer

CAS 7732-18-5
Color Colorless
Packaging Plastic bottle
Physical Form Liquid
pH 9.98 to 10.02 (20°C)
Health Hazard 1
Chemical Name or Material Buffer solution pH 10
12

Buffer solution pH 7, Phosphate buffer

CAS: 7558-79-4 | H2KO4P

CAS 7732-18-5
MDL Number MFCD03097944
Packaging Plastic bottle
Chemical Name or Material Buffer solution pH 7
Merck Index 14, 7659
Molecular Formula H2KO4P
Formula Weight 136.09
Vapor Pressure 14mmHg at 20°C
14
Promotions Available

Buffer Solution, TISAB, Fisher Chemical™

For Analysis of the Determination of Fluoride Ion Concentration by Fluoride Ion Electrode

Name Note Total Ionic Strength Adjustment Buffer
CAS 52-51-7
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!
Color Undesignated
Physical Form Liquid
pH 5.5
Chemical Name or Material Buffer Solution, TISAB
Identification Pass Test
ChemAlert Storage Symbol Gray
15

Thermo Scientific Chemicals Citrate Buffer, 0.2M buffer soln., pH 4.0, low endotoxin

CAS: 6132-04-3 | C6H9Na3O9 | 294.10 g/mol

Storage Note 1 2° to 8°C
Molecular Weight (g/mol) 294.10
Color Colorless
Physical Form Liquid
Chemical Name or Material Citrate Buffer
Concentration 0.2 M
InChI Key NLJMYIDDQXHKNR-UHFFFAOYSA-K
Name Note low endotoxin
CAS 4-3-6132
MDL Number MFCD00150031
pH 4.0
TSCA Yes
Recommended Storage Keep cold
Molecular Formula C6H9Na3O9