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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

 

Electrochemistry Buffers (41)
Matrix Blanks and Standardization Solutions (23)
Electrochemistry Standards (15)
Chromatography Standards (2)
Quality Control and Proficiency Samples (1)

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1 – 15 of 27 results
1

Buffer solution pH 4.01 (+/-0.022 @ 25oC) No Color Specpure NIST Traceable

CAS: 1336-21-6 | H5NO | 35.05 g/mol

EDGE
Molecular Weight (g/mol) 35.05
ChEBI CHEBI:18219
Color Colorless
Physical Form Liquid
Chemical Name or Material Buffer solution
SMILES N.O
InChI Key VHUUQVKOLVNVRT-UHFFFAOYSA-N
Vapor Pressure 23 hPa (17mm Hg) at 20°C
PubChem CID 14923
MDL Number MFCD00066650
Solubility Information Miscible with water.
TSCA Yes
Recommended Storage Ambient temperatures
IUPAC Name azanium;hydroxide
Molecular Formula H5NO
Odor Odorless
2
Promotions Available

Traceable™ Conductivity Calibration Standards Certified Reference Material (CRM), NIST tested, Fisherbrand™

Use NIST-traceable reference materials for the highest accuracy available. Traceable™ Conductivity Calibration Standards Certified Reference Material (CRM) offer easy calibration with included instructions and temperature chart.

EDGE
Type Conductivity Standard
For Use With (Equipment) Conductivity Meter
Solubility Soluble in water
Color Clear
Packaging Bottle
Chemical Name or Material Conductivity Standard
Certifications/Compliance ISO 17034
Technique Calibration of Conductivity Instrument
Solution Type Calibration Solution
3

Buffer solution, pH 2.00 (+/-0.026 @ 25oC), No Color, Specpure, NIST Traceable

For Calibration of pH Meters | CAS: 7447-40-7

EDGE
Color Colorless
Traceability to NIST Yes
Physical Form Liquid
Chemical Name or Material Buffer solution
Vapor Pressure 23 hPa (17mm Hg) at 20°C
Concentration or Composition (by Analyte or Components) Potassium chloride: 0.7%; Hydrochloric acid: 0.7%; water: 98.6%
CAS 7732-18-5
Health Hazard 3 P234-P390
MDL Number MFCD00146252
Health Hazard 2 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. Wear suitable gloves and eye/face protection. This material and/or its container must be disposed of as hazardous waste.
Solubility Information Soluble in water.
Health Hazard 1 H290
TSCA Yes
Recommended Storage Ambient temperatures
4

Buffer solution, pH 9.00 (+/-0.024 @ 25oC), No Color, Specpure, NIST Traceable

EDGE
Name Note NIST Traceable
Solubility Miscible with water
MDL Number MFCD00147253
Physical Form Liquid
Chemical Name or Material Buffer solution, pH 9.00 (±0.01 at 25°C)
Grade Specpure™
TSCA Yes
Recommended Storage Ambient temperatures
5

Buffer solution pH 10.00 (+/-0.024 @ 25oC) Colored Blue Specpure NIST Traceable

CAS: 1336-21-6 | H5NO | 35.05 g/mol

EDGE
6

Buffer solution pH 10.00 (+/-0.024 @ 25oC) No Color Specpure NIST Traceable

CAS: 1336-21-6 | H5NO | 35.05 g/mol

Molecular Weight (g/mol) 35.05
ChEBI CHEBI:18219
Physical Form Liquid
Chemical Name or Material Buffer solution
Grade Specpure™
SMILES N.O
InChI Key VHUUQVKOLVNVRT-UHFFFAOYSA-N
PubChem CID 14923
Name Note pH 10.00 (±0.01 at 25°C), No Color, NIST Traceable
CAS 1336-21-6
Health Hazard 3 GHS P Statement
P280-P305+P351+P338-P362-P321-P332+P313-P337+P313
Wear protective gloves/protective clothing/eye protection/face protection.
IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Take off contaminated clothing and wash before reuse.
Specific treatment (see ... on this label).
If skin irritation occurs: Get medical advice/attention.
If eye irritation persists: Get medical advice/attention.
MDL Number MFCD00066650
Health Hazard 2 GHS H Statement
H315-H319
Causes skin irritation.
Causes serious eye irritation.
Health Hazard 1 Warning
TSCA Yes
Recommended Storage Ambient temperatures
Molecular Formula H5NO
7

Buffer solution pH 4.00 (+/-0.022 @ 25oC) Colored Red Specpure NIST Traceable

CAS: 1310-73-2

Concentration or Composition (by Analyte or Components) Sodium hydroxide: 0.7%; Potassium dihydrogen phosphate: 0.7%; water: 98.6%
CAS 7732-18-5
MDL Number MFCD00146206
Color Red
Solubility Information Miscible with water.
Physical Form Liquid
Chemical Name or Material Buffer solution
TSCA Yes
Recommended Storage Ambient temperatures
Vapor Pressure 23 hPa (17mm Hg) at 20°C
8

Buffer solution, pH 7.00 (+/-0.024 @ 25oC), Colored Yellow, Specpure, NIST Traceable

CAS: 1310-73-2

Concentration or Composition (by Analyte or Components) Sodium hydroxide: 0.7%; Potassium dihydrogen phosphate: 0.7%; water: 98.6%
CAS 7732-18-5
MDL Number MFCD00146252
Color Yellow
Solubility Information Miscible with water.
Physical Form Liquid
Chemical Name or Material Buffer solution
TSCA Yes
Recommended Storage Ambient temperatures
Vapor Pressure 23 hPa (17mm Hg) at 20°C
9

Buffer solution, pH 6.00 (+/-0.024 @ 25oC), No Color, Specpure, NIST Traceable

Name Note NIST Traceable
Health Hazard 3 P234-P264b-P280-P302+P352-P305+P351+P338-P332+P313-P362-P390
Solubility Miscible with water
MDL Number MFCD00134130
Physical Form Liquid
Health Hazard 1 H290-H315-H319
Chemical Name or Material Buffer solution, pH 6.00 (±0.01 at 25°C)
Grade Specpure™
TSCA Yes
Recommended Storage Ambient temperatures
10

Buffer solution, pH 1.68 (+/-0.026 @ 25°C), No Color, Specpure, NIST Traceable

CAS: 7447-40-7

Concentration or Composition (by Analyte or Components) Potassium chloride: 0.7%; Hydrochloric acid: 0.7%; water: 98.6%
CAS 7732-18-5
Health Hazard 3 P234-P390
MDL Number MFCD00147253
Color Colorless
Solubility Information Miscible with water.
Physical Form Liquid
Health Hazard 1 H290
Chemical Name or Material Buffer solution
TSCA Yes
Recommended Storage Ambient temperatures
Odor Odorless
Vapor Pressure 23 hPa (17mm Hg) at 20°C
11

Buffer solution pH 7.00 (+/-0.024 @ 25oC) No Color Specpure NIST Traceable

CAS: 1336-21-6 | H5NO | 35.05 g/mol

Molecular Weight (g/mol) 35.05
ChEBI CHEBI:18219
Color Colorless
Traceability to NIST Yes
Physical Form Liquid
Chemical Name or Material Buffer solution
Grade Specpure™
SMILES N.O
InChI Key VHUUQVKOLVNVRT-UHFFFAOYSA-N
PubChem CID 14923
CAS 1336-21-6
MDL Number MFCD00066650
Solubility Information pH 7.00 buffers are in solution form. Miscible with water.
TSCA Yes
Recommended Storage Ambient temperatures
Molecular Formula H5NO
Odor Odorless
12

Buffer solution, pH 9.18 (+/-0.024 @ 25oC), No Color, Specpure, NIST Traceable

Name Note NIST Traceable
Health Hazard 3 P234-P390
MDL Number MFCD00147253
Physical Form Liquid
Health Hazard 1 H290
Chemical Name or Material Buffer solution, pH 9.18 (±0.01 at 25°C)
Grade Specpure™
TSCA Yes
Recommended Storage Ambient temperatures
13

Buffer solution, pH 12.00 (+/-0.01 @ 25oC), No Color, Specpure, NIST Traceable

CAS: 1336-21-6 | H5NO | 35.05 g/mol

PubChem CID 14923
CAS 1336-21-6
Molecular Weight (g/mol) 35.05
ChEBI CHEBI:18219
MDL Number MFCD00066650
Solubility Information Immiscible with water.
Physical Form Liquid
Chemical Name or Material Buffer solution
SMILES N.O
TSCA Yes
Recommended Storage Ambient temperatures
InChI Key VHUUQVKOLVNVRT-UHFFFAOYSA-N
Molecular Formula H5NO
14

Buffer solution, pH 6.86 (+/-0.024 @ 25oC), No Color, Specpure, NIST Traceable

CAS: 1336-21-6 | H5NO | 35.05 g/mol

Molecular Weight (g/mol) 35.05
ChEBI CHEBI:18219
Color Colorless
Physical Form Liquid
Chemical Name or Material Buffer solution
SMILES N.O
InChI Key VHUUQVKOLVNVRT-UHFFFAOYSA-N
PubChem CID 14923
CAS 1336-21-6
MDL Number MFCD00066650
TSCA Yes
Recommended Storage Ambient temperatures
Molecular Formula H5NO
Odor Odorless
15

Buffer solution pH 7.00 (+/-0.024 @ 25oC) Colored Green Specpure NIST Traceable

CAS: 1336-21-6 | H5NO | 35.05 g/mol

Molecular Weight (g/mol) 35.05
ChEBI CHEBI:18219
Color Green
Traceability to NIST Yes
Physical Form Liquid
Chemical Name or Material Buffer solution
Grade Specpure™
SMILES N.O
InChI Key VHUUQVKOLVNVRT-UHFFFAOYSA-N
Vapor Pressure 23 hPa (17mm Hg) at 20°C
PubChem CID 14923
Name Note NIST Traceable
CAS 1336-21-6
MDL Number MFCD00066650
Solubility Information Miscible with water.
TSCA No
Recommended Storage Ambient temperatures
Molecular Formula H5NO