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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

 

Life Science Buffers (40)
General Chemistry Solutions (9)

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1 – 15 of 30 results
1

HEPES (Fine White Crystals/Molecular Biology), Fisher BioReagents™

Commonly used buffering agent | CAS: 7365-45-9 | C8H18N2O4S | 238.30 g/mol

EDGE
Molecular Weight (g/mol) 238.30
ChEBI CHEBI:42334
Color White
Chemical Name or Material HEPES
Grade Molecular Biology
SMILES OCCN1CCN(CCS(O)(=O)=O)CC1
Identification Pass Test
DNase DNase free
Merck Index 15, 4689
InChI Key JKMHFZQWWAIEOD-UHFFFAOYSA-N
ChemAlert Storage Symbol Gray
Assay Percent Range ≥99 %
PubChem CID 23831
Absorbance 0.01 max. (0.1M solution) at 280nm
Percent Purity ≥99%
CAS 7365-45-9
Protease Protease free
Health Hazard 3 Emergency Overview
Causes 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. 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. Obtain medical attention. Do not induce vomiting. Obtain medical attention. Obtain medical attention. .

NFPA

Health:2
Flammability:1
Instability:1
MDL Number MFCD00006158
Health Hazard 2 WARNING!
Solubility Information Soluble in water
pH 5.0 to 6.5
Purity Grade Notes DNase-, RNase- and Protease-Free
Recommended Storage RT
Molecular Formula C8H18N2O4S
2

TE Buffer, Tris-EDTA, 1X Solution, pH 8.0, Molecular Biology, Fisher BioReagents

EDGE
Color Colorless
Physical Form Liquid
Chemical Name or Material Tris-EDTA
Grade Molecular Biology
DNase DNase free
Filtered Through Filtered through a 5-micron filter.
ChemAlert Storage Symbol Gray
Name Note 1X Solution, pH 8.0
CAS 7732-18-5
Protease Protease free
Health Hazard 3 Emergency Overview
May cause eye, skin, and respiratory tract irritation. Avoid contact with skin and eyes. Do not breathe dust. Do not breathe vapors or spray mist. Wash off immediately with soap and plenty of water removing all contaminated clothes and shoes. Obtain medical attention. Rinse immediately with plenty of water, also under the eyelids, for at least 15 minutes. Obtain medical attention. Remove from exposure, lie down. Move to fresh air. If breathing is difficult, give oxygen. If not breathing, give artificial respiration. If not breathing, give artificial respiration. Obtain medical attention.

NFPA

Health:1
Flammability:0
Instability:0
Health Hazard 2 CAUTION!
pH 7.4 to 8.1
Synonym TE
Recommended Storage RT
4

MOPS (Fine White Crystals/Molecular Biology), Fisher BioReagents™

CAS: 1132-61-2 Molecular Formula: C7H15NO4S Molecular Weight (g/mol): 209.26 MDL Number: MFCD00006183 InChI Key: DVLFYONBTKHTER-UHFFFAOYSA-N Synonym: 3-(4-Morpholino)propane sulfonic acid PubChem CID: 70807 ChEBI: CHEBI:44115 IUPAC Name: 3-morpholin-4-ylpropane-1-sulfonic acid SMILES: [O-]S(=O)(=O)CCC[NH+]1CCOCC1

PubChem CID 70807
CAS 1132-61-2
Molecular Weight (g/mol) 209.26
ChEBI CHEBI:44115
MDL Number MFCD00006183
SMILES [O-]S(=O)(=O)CCC[NH+]1CCOCC1
Synonym 3-(4-Morpholino)propane sulfonic acid
IUPAC Name 3-morpholin-4-ylpropane-1-sulfonic acid
InChI Key DVLFYONBTKHTER-UHFFFAOYSA-N
Molecular Formula C7H15NO4S
6
Promotions Available

TE Buffer, Tris-EDTA, 100X Solution, pH 8.0, Molecular Biology, Fisher BioReagents™

Name Note 100X Solution
CAS 7732-18-5
Protease Protease free
Health Hazard 3 Emergency Overview
Irritating to eyes and skin. Wear personal protective equipment. Ensure adequate ventilation. Avoid contact with skin, eyes and clothing. Avoid ingestion and inhalation. 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. Get medical attention immediately if symptoms occur. Do not induce vomiting.

NFPA

Health:2
Flammability:0
Instability:0
Health Hazard 2 WARNING!
Color Undesignated
Physical Form Liquid
Chemical Name or Material Tris-EDTA
Grade Molecular Biology
DNase DNase free
Recommended Storage RT
Filtered Through Filtered through a 0.2-micron filter.
ChemAlert Storage Symbol Gray
7

Phenol, Saturated (pH 6.6/7.9, Liq.), Fisher BioReagents™

CAS: 108-95-2 Molecular Formula: C6H6O Molecular Weight (g/mol): 94.11 MDL Number: MFCD00002143 InChI Key: ISWSIDIOOBJBQZ-UHFFFAOYSA-N Synonym: carbolic acid,hydroxybenzene,phenic acid,phenylic acid,oxybenzene,benzenol,phenyl hydrate,monophenol,phenyl hydroxide,phenylic alcohol PubChem CID: 996 ChEBI: CHEBI:15882 IUPAC Name: phenol SMILES: OC1=CC=CC=C1

PubChem CID 996
CAS 108-95-2
Molecular Weight (g/mol) 94.11
ChEBI CHEBI:15882
MDL Number MFCD00002143
SMILES OC1=CC=CC=C1
Synonym carbolic acid,hydroxybenzene,phenic acid,phenylic acid,oxybenzene,benzenol,phenyl hydrate,monophenol,phenyl hydroxide,phenylic alcohol
IUPAC Name phenol
InChI Key ISWSIDIOOBJBQZ-UHFFFAOYSA-N
Molecular Formula C6H6O
9

Thermo Scientific Chemicals TRIS-buffered saline (TBS, 10X) pH 7.4, for Western blot

CAS: 77-86-1 Molecular Formula: C4H11NO3 Molecular Weight (g/mol): 121.136 MDL Number: MFCD00004679 InChI Key: LENZDBCJOHFCAS-UHFFFAOYSA-N PubChem CID: 6503 ChEBI: CHEBI:9754 IUPAC Name: 2-amino-2-(hydroxymethyl)propane-1,3-diol SMILES: C(C(CO)(CO)N)O

EDGE
PubChem CID 6503
CAS 77-86-1
Molecular Weight (g/mol) 121.136
ChEBI CHEBI:9754
MDL Number MFCD00004679
SMILES C(C(CO)(CO)N)O
IUPAC Name 2-amino-2-(hydroxymethyl)propane-1,3-diol
InChI Key LENZDBCJOHFCAS-UHFFFAOYSA-N
Molecular Formula C4H11NO3
10

CAPS (Fine White Crystals), Fisher BioReagents

CAS: 1135-40-6 Molecular Formula: C9H19NO3S Molecular Weight (g/mol): 221.32 MDL Number: MFCD00003837 InChI Key: PJWWRFATQTVXHA-UHFFFAOYSA-N Synonym: 3-Cyclohexylamino-1-propanesulfonic Acid PubChem CID: 70815 IUPAC Name: 3-(cyclohexylamino)propane-1-sulfonic acid SMILES: OS(=O)(=O)CCCNC1CCCCC1

PubChem CID 70815
CAS 1135-40-6
Molecular Weight (g/mol) 221.32
MDL Number MFCD00003837
SMILES OS(=O)(=O)CCCNC1CCCCC1
Synonym 3-Cyclohexylamino-1-propanesulfonic Acid
IUPAC Name 3-(cyclohexylamino)propane-1-sulfonic acid
InChI Key PJWWRFATQTVXHA-UHFFFAOYSA-N
Molecular Formula C9H19NO3S
11

Phenol, Saturated (pH 4.3, Liq.), Fisher BioReagents

CAS: 108-95-2 Molecular Formula: C6H6O Molecular Weight (g/mol): 94.11 MDL Number: MFCD00002143 InChI Key: ISWSIDIOOBJBQZ-UHFFFAOYSA-N Synonym: carbolic acid,hydroxybenzene,phenic acid,phenylic acid,oxybenzene,benzenol,phenyl hydrate,monophenol,phenyl hydroxide,phenylic alcohol PubChem CID: 996 ChEBI: CHEBI:15882 IUPAC Name: phenol SMILES: OC1=CC=CC=C1

PubChem CID 996
CAS 108-95-2
Molecular Weight (g/mol) 94.11
ChEBI CHEBI:15882
MDL Number MFCD00002143
SMILES OC1=CC=CC=C1
Synonym carbolic acid,hydroxybenzene,phenic acid,phenylic acid,oxybenzene,benzenol,phenyl hydrate,monophenol,phenyl hydroxide,phenylic alcohol
IUPAC Name phenol
InChI Key ISWSIDIOOBJBQZ-UHFFFAOYSA-N
Molecular Formula C6H6O
14

HEPES Sodium Salt (White Powder), Fisher BioReagents

CAS: 75277-39-3 Molecular Formula: C8H17N2NaO4S Molecular Weight (g/mol): 260.28 MDL Number: MFCD00036463 InChI Key: RDZTWEVXRGYCFV-UHFFFAOYSA-M PubChem CID: 2724248 ChEBI: CHEBI:46758 IUPAC Name: sodium 2-[4-(2-hydroxyethyl)piperazin-1-yl]ethane-1-sulfonate SMILES: [Na+].OCCN1CCN(CCS([O-])(=O)=O)CC1

PubChem CID 2724248
CAS 75277-39-3
Molecular Weight (g/mol) 260.28
ChEBI CHEBI:46758
MDL Number MFCD00036463
SMILES [Na+].OCCN1CCN(CCS([O-])(=O)=O)CC1
IUPAC Name sodium 2-[4-(2-hydroxyethyl)piperazin-1-yl]ethane-1-sulfonate
InChI Key RDZTWEVXRGYCFV-UHFFFAOYSA-M
Molecular Formula C8H17N2NaO4S