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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 11,907 results
1

Thiocyanate Standard Solution (0.1N (N/10)/Certified), Fisher Chemical

CAS: 333-20-0 Molecular Formula: CKNS Molecular Weight (g/mol): 97.176 MDL Number: MFCD00011413 InChI Key: ZNNZYHKDIALBAK-UHFFFAOYSA-M Synonym: Potassium Thiocyanate Solutions PubChem CID: 516872 ChEBI: CHEBI:30951 IUPAC Name: potassium;thiocyanate SMILES: C(#N)[S-].[K+]

EDGE
PubChem CID 516872
CAS 333-20-0
Molecular Weight (g/mol) 97.176
ChEBI CHEBI:30951
MDL Number MFCD00011413
SMILES C(#N)[S-].[K+]
Synonym Potassium Thiocyanate Solutions
IUPAC Name potassium;thiocyanate
InChI Key ZNNZYHKDIALBAK-UHFFFAOYSA-M
Molecular Formula CKNS
2

Sodium Thiosulfate Pentahydrate Solution (0.1N (N/10)/Certified), Fisher Chemical™

CAS: 10102-17-7 Molecular Formula: H10Na2O8S2 Molecular Weight (g/mol): 248.172 MDL Number: MFCD00003499 InChI Key: PODWXQQNRWNDGD-UHFFFAOYSA-L Synonym: sodium thiosulfate pentahydrate,ametox,sodium thiosulfate, pentahydrate,antichlor,tinver,disodium thiosulfate pentahydrate,unii-hx1032v43m,ccris 3952,thiosulfuric acid, disodium salt, pentahydrate,sodium hyposulfite pentahydrate PubChem CID: 61475 ChEBI: CHEBI:32150 IUPAC Name: disodium;dioxido-oxo-sulfanylidene-$l^{6}-sulfane;pentahydrate SMILES: O.O.O.O.O.[O-]S(=O)(=S)[O-].[Na+].[Na+]

EDGE
PubChem CID 61475
CAS 10102-17-7
Molecular Weight (g/mol) 248.172
ChEBI CHEBI:32150
MDL Number MFCD00003499
SMILES O.O.O.O.O.[O-]S(=O)(=S)[O-].[Na+].[Na+]
Synonym sodium thiosulfate pentahydrate,ametox,sodium thiosulfate, pentahydrate,antichlor,tinver,disodium thiosulfate pentahydrate,unii-hx1032v43m,ccris 3952,thiosulfuric acid, disodium salt, pentahydrate,sodium hyposulfite pentahydrate
IUPAC Name disodium;dioxido-oxo-sulfanylidene-$l^{6}-sulfane;pentahydrate
InChI Key PODWXQQNRWNDGD-UHFFFAOYSA-L
Molecular Formula H10Na2O8S2
3

Hydrogen Peroxide, 50% (Certified), Fisher Chemical

CAS: 7722-84-1 Molecular Formula: H2O2 Molecular Weight (g/mol): 34.014 MDL Number: MFCD00011333 InChI Key: MHAJPDPJQMAIIY-UHFFFAOYSA-N Synonym: oxydol,perhydrol,superoxol,interox,hydrogen dioxide,inhibine,peroxaan,albone,hioxyl,kastone PubChem CID: 784 ChEBI: CHEBI:16240 IUPAC Name: hydrogen peroxide SMILES: OO

EDGE
PubChem CID 784
CAS 7722-84-1
Molecular Weight (g/mol) 34.014
ChEBI CHEBI:16240
MDL Number MFCD00011333
SMILES OO
Synonym oxydol,perhydrol,superoxol,interox,hydrogen dioxide,inhibine,peroxaan,albone,hioxyl,kastone
IUPAC Name hydrogen peroxide
InChI Key MHAJPDPJQMAIIY-UHFFFAOYSA-N
Molecular Formula H2O2
4

Phosphate Buffered Saline (PBS), 10X Powder, pH 7.4, Fisher BioReagents™

Phosphate Buffered Saline (PBS), 10X Powder provides a convenient way to make 1 L of 10X stock PBS solution.

EDGE
5

TBE Buffer, Tris-Borate-EDTA, 10X Solution, Electrophoresis, Fisher BioReagents™

CAS: 10043-35-3 Synonym: TBE

EDGE
CAS 10043-35-3
Synonym TBE
6

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
7

Tris Base (White Crystals or Crystalline Powder/Triple-Crystallized), Fisher BioReagents™

For sensitive molecular biology, tissue culture, and electrophoresis methods | CAS: 77-86-1 | C4H11NO3 | 121.136 g/mol

EDGE
8

MES (Fine White Crystals), Fisher BioReagents

CAS: 145224-94-8 Molecular Formula: C6H15NO5S Molecular Weight (g/mol): 213.25 MDL Number: MFCD00149409 InChI Key: MIIIXQJBDGSIKL-UHFFFAOYSA-N Synonym: 2-(4-Morpholino)ethane Sulfonic Acid,2-(N-Morpholino)ethanesulfonic acid hydrate PubChem CID: 16218417 IUPAC Name: 2-(morpholin-4-yl)ethane-1-sulfonic acid hydrate SMILES: O.OS(=O)(=O)CCN1CCOCC1

EDGE
PubChem CID 16218417
CAS 145224-94-8
Molecular Weight (g/mol) 213.25
MDL Number MFCD00149409
SMILES O.OS(=O)(=O)CCN1CCOCC1
Synonym 2-(4-Morpholino)ethane Sulfonic Acid,2-(N-Morpholino)ethanesulfonic acid hydrate
IUPAC Name 2-(morpholin-4-yl)ethane-1-sulfonic acid hydrate
InChI Key MIIIXQJBDGSIKL-UHFFFAOYSA-N
Molecular Formula C6H15NO5S
9

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
10

TAE Buffer, Tris-Acetate-EDTA, 50X Solution, Electrophoresis, Fisher BioReagents™

Tris-Acetate-EDTA, CAS Number-77-86-1, 60-00-4, 6850-28-8, TAE, 4L, Gray, Tris (24%), Acetic Acid (5.0%), and EDTA (<2%)., DNase free, Pass Test, Filtered through a 0.2-micron filter., Electrophoresis, 50X Solution, Poly CUBE, Liquid, Protease free, DNase-, RNase- and Protease-Free, RT

EDGE
Name Note 50X Solution
Concentration or Composition (by Analyte or Components) Tris (24%), Acetic Acid (5.0%), and EDTA (<2%).
CAS 6850-28-8
Protease Protease free
Physical Form Liquid
Grade Electrophoresis
Synonym TAE
Purity Grade Notes DNase-, RNase- and Protease-Free
DNase DNase free
Recommended Storage RT
Filtered Through Filtered through a 0.2-micron filter.
ChemAlert Storage Symbol Gray
11

TBS, Tris Buffered Saline, 10X Solution, pH 7.4, Molecular Biology, Fisher BioReagents™

EDGE
Boiling Point 100°C
Color Colorless
Physical Form Liquid
Chemical Name or Material Tris Buffered Saline
Grade Molecular Biology
DNase DNase free
ChemAlert Storage Symbol Gray
Name Note 10X Solution
Concentration or Composition (by Analyte or Components) 10X solution contains 1.37M Sodium Chloride, 0.027M Potassium Chloride, and 0.25M Tris/Tris-HCl.
CAS 7732-18-5
Protease Protease free
pH 7.5
Synonym TBS
Purity Grade Notes DNase-, RNase- and Protease-Free
Recommended Storage RT
12

Sodium Thiosulfate Pentahydrate Solution (0.025N (N/40)/Certified), Fisher Chemical

CAS: 10102-17-7 Molecular Formula: H10Na2O8S2 Molecular Weight (g/mol): 248.172 MDL Number: MFCD00003499 InChI Key: PODWXQQNRWNDGD-UHFFFAOYSA-L Synonym: sodium thiosulfate pentahydrate,ametox,sodium thiosulfate, pentahydrate,antichlor,tinver,disodium thiosulfate pentahydrate,unii-hx1032v43m,ccris 3952,thiosulfuric acid, disodium salt, pentahydrate,sodium hyposulfite pentahydrate PubChem CID: 61475 ChEBI: CHEBI:32150 IUPAC Name: disodium;dioxido-oxo-sulfanylidene-$l^{6}-sulfane;pentahydrate SMILES: O.O.O.O.O.[O-]S(=O)(=S)[O-].[Na+].[Na+]

EDGE
PubChem CID 61475
CAS 10102-17-7
Molecular Weight (g/mol) 248.172
ChEBI CHEBI:32150
MDL Number MFCD00003499
SMILES O.O.O.O.O.[O-]S(=O)(=S)[O-].[Na+].[Na+]
Synonym sodium thiosulfate pentahydrate,ametox,sodium thiosulfate, pentahydrate,antichlor,tinver,disodium thiosulfate pentahydrate,unii-hx1032v43m,ccris 3952,thiosulfuric acid, disodium salt, pentahydrate,sodium hyposulfite pentahydrate
IUPAC Name disodium;dioxido-oxo-sulfanylidene-$l^{6}-sulfane;pentahydrate
InChI Key PODWXQQNRWNDGD-UHFFFAOYSA-L
Molecular Formula H10Na2O8S2
13

Silver Nitrate Solution (1N/Certified), Fisher Chemical

CAS: 7761-88-8 Molecular Formula: AgNO3 Molecular Weight (g/mol): 169.87 MDL Number: MFCD00003414 InChI Key: SQGYOTSLMSWVJD-UHFFFAOYSA-N Synonym: silver nitrate,silvernitrate,lunar caustic,silbernitrat,argenti nitras,nitrate d'argent,nitric acid silver i salt,silver mononitrate,silver i nitrate,argerol PubChem CID: 24470 ChEBI: CHEBI:32130 IUPAC Name: silver(1+) nitrate SMILES: [Ag+].[O-][N+]([O-])=O

EDGE
PubChem CID 24470
CAS 7761-88-8
Molecular Weight (g/mol) 169.87
ChEBI CHEBI:32130
MDL Number MFCD00003414
SMILES [Ag+].[O-][N+]([O-])=O
Synonym silver nitrate,silvernitrate,lunar caustic,silbernitrat,argenti nitras,nitrate d'argent,nitric acid silver i salt,silver mononitrate,silver i nitrate,argerol
IUPAC Name silver(1+) nitrate
InChI Key SQGYOTSLMSWVJD-UHFFFAOYSA-N
Molecular Formula AgNO3
14

Hydrogen Peroxide, Fisher Chemical™

CAS: 7722-84-1 Molecular Formula: H2O2 Molecular Weight (g/mol): 34.014 MDL Number: MFCD00011333 InChI Key: MHAJPDPJQMAIIY-UHFFFAOYSA-N Synonym: oxydol,perhydrol,superoxol,interox,hydrogen dioxide,inhibine,peroxaan,albone,hioxyl,kastone PubChem CID: 784 ChEBI: CHEBI:16240 IUPAC Name: hydrogen peroxide SMILES: OO

EDGE
PubChem CID 784
CAS 7722-84-1
Molecular Weight (g/mol) 34.014
ChEBI CHEBI:16240
MDL Number MFCD00011333
SMILES OO
Synonym oxydol,perhydrol,superoxol,interox,hydrogen dioxide,inhibine,peroxaan,albone,hioxyl,kastone
IUPAC Name hydrogen peroxide
InChI Key MHAJPDPJQMAIIY-UHFFFAOYSA-N
Molecular Formula H2O2
15

Electrode Storage Solution, Fisher BioReagents™

For use in storage of pH electrodes

EDGE