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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

 

General Chemistry Solutions (173)
Chromatography Standards (165)
Life Science Buffers (113)
Electrochemistry Buffers (91)
Matrix Blanks and Standardization Solutions (28)
Spectroscopy Standards (28)
Karl Fischer Buffers and Reagents (23)
Environmental Testing Standards (16)
Electrochemistry Standards (13)
Kjeldahl Buffers and Reagents (12)
Viscosity Standards (2)
Isotope Standards (1)

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Keyword Search:
1 – 15 of 497 results
1
Promotions Available

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

EDGE
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
2
Promotions Available

Buffer Solution, pH 4.00, Color-Coded Red (Certified), Fisher Chemical™

pH/temperature conversions given on label

Boiling Point 100°C
Description pH/temperature conversions given on label.
Color Red
Traceability to NIST Traceable to NIST.
Physical Form Liquid
Chemical Name or Material Buffer Solution, pH 4.00, Color-Coded Red
Grade Certified
Identification Pass Test
ChemAlert Storage Symbol Gray
Density 1.0g/cm³
Absorbance Pass Test
Concentration or Composition (by Analyte or Components) Potassium Hydrogen Phthalate
CAS 16423-68-0
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!
Solubility Information Soluble in water
pH 4.0
Specific Gravity 1
Melting Point 0°C
3
Promotions Available

FisherTab™ TT-35 Kjeldahl Tablets, Fisher Chemical

Composition per tablet: 3.5g K2SO4 + 0.1g CuSO4 + 0.1g TiO2

EDGE
4
Promotions Available

TE Buffer, Tris-EDTA, 1X Solution, pH 7.4, Molecular Biology, Fisher BioReagents™

Tris-EDTA (TE) is routinely used for suspending nucleic acid samples.

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 7.4
CAS 7732-18-5
Protease Protease free
Health Hazard 3 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.
Health Hazard 2 CAUTION!
pH 7.4 to 8.1
Synonym TE
Recommended Storage RT
5
Promotions Available

Bis-Tris, Fisher BioReagents
GSA_VA

CAS: 6976-37-0 Molecular Formula: C8H19NO5 Molecular Weight (g/mol): 209.242 InChI Key: OWMVSZAMULFTJU-UHFFFAOYSA-N Synonym: 2,2-Bis(hydroxymethyl)-2,2?,2?-nitrilotriethanol,2, 2-Bis(hydroxymethyl)-2, 2?,Bis(2-hydroxyethyl)amino-tris(hydroxymethyl)methane PubChem CID: 81462 ChEBI: CHEBI:41250 IUPAC Name: 2-[bis(2-hydroxyethyl)amino]-2-(hydroxymethyl)propane-1,3-diol SMILES: C(CO)N(CCO)C(CO)(CO)CO

EDGE
PubChem CID 81462
CAS 6976-37-0
Molecular Weight (g/mol) 209.242
ChEBI CHEBI:41250
SMILES C(CO)N(CCO)C(CO)(CO)CO
Synonym 2,2-Bis(hydroxymethyl)-2,2?,2?-nitrilotriethanol,2, 2-Bis(hydroxymethyl)-2, 2?,Bis(2-hydroxyethyl)amino-tris(hydroxymethyl)methane
IUPAC Name 2-[bis(2-hydroxyethyl)amino]-2-(hydroxymethyl)propane-1,3-diol
InChI Key OWMVSZAMULFTJU-UHFFFAOYSA-N
Molecular Formula C8H19NO5
6
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Titration Solvent, Fisher Chemical

EDGE
7
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Potassium Iodide, 1.0N, Fisher Chemical™

CAS: 7681-11-0 Molecular Formula: IK Molecular Weight (g/mol): 166.003 MDL Number: MFCD00011405 InChI Key: NLKNQRATVPKPDG-UHFFFAOYSA-M Synonym: potassium iodide,potassium iodide ki,pima,kali iodide,thyro-block,knollide,kisol,asmofug e,potassium diiodide,potassium monoiodide PubChem CID: 4875 ChEBI: CHEBI:8346 IUPAC Name: potassium;iodide SMILES: [K+].[I-]

EDGE
PubChem CID 4875
CAS 7681-11-0
Molecular Weight (g/mol) 166.003
ChEBI CHEBI:8346
MDL Number MFCD00011405
SMILES [K+].[I-]
Synonym potassium iodide,potassium iodide ki,pima,kali iodide,thyro-block,knollide,kisol,asmofug e,potassium diiodide,potassium monoiodide
IUPAC Name potassium;iodide
InChI Key NLKNQRATVPKPDG-UHFFFAOYSA-M
Molecular Formula IK
8
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Calcium Chloride Solution, Fisher Chemical

CAS: 10043-52-4 Molecular Formula: CaCl2 Molecular Weight (g/mol): 110.98 MDL Number: MFCD00149613 InChI Key: UXVMQQNJUSDDNG-UHFFFAOYSA-L Synonym: calcium chloride,calcium dichloride,calcium chloride anhydrous,calcium ii chloride,calciumchloride,caloride,liquical,calcium chloride pellets,isocal,jarcal PubChem CID: 5284359 ChEBI: CHEBI:3312 IUPAC Name: calcium dichloride SMILES: [Cl-].[Cl-].[Ca++]

EDGE
PubChem CID 5284359
CAS 10043-52-4
Molecular Weight (g/mol) 110.98
ChEBI CHEBI:3312
MDL Number MFCD00149613
SMILES [Cl-].[Cl-].[Ca++]
Synonym calcium chloride,calcium dichloride,calcium chloride anhydrous,calcium ii chloride,calciumchloride,caloride,liquical,calcium chloride pellets,isocal,jarcal
IUPAC Name calcium dichloride
InChI Key UXVMQQNJUSDDNG-UHFFFAOYSA-L
Molecular Formula CaCl2
9
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TAN Standard (Certified), Fisher Chemical

CAS: 79-09-4 Molecular Formula: C3H6O2 Molecular Weight (g/mol): 74.079 MDL Number: MFCD00212734 InChI Key: XBDQKXXYIPTUBI-UHFFFAOYSA-N PubChem CID: 1032 ChEBI: CHEBI:30768 IUPAC Name: propanoic acid SMILES: CCC(=O)O

EDGE
PubChem CID 1032
CAS 79-09-4
Molecular Weight (g/mol) 74.079
ChEBI CHEBI:30768
MDL Number MFCD00212734
SMILES CCC(=O)O
IUPAC Name propanoic acid
InChI Key XBDQKXXYIPTUBI-UHFFFAOYSA-N
Molecular Formula C3H6O2
10
Promotions Available

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

EDGE
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
11
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Silver Nitrate Solution (0.25N), 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
12
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HEPES Buffer, 1M Solution, pH 7.3 (Molecular Biology), Fisher BioReagents™
GSA_VA

Commonly used buffering agent

EDGE
Color Undesignated
Physical Form Liquid
Chemical Name or Material HEPES Buffer
Grade Molecular Biology
Identification Pass Test
DNase DNase free
Merck Index 15, 4689
Concentration 0.95 to 1.05 M
ChemAlert Storage Symbol Gray
Absorbance ≤0.01(0.1M solution) at 260nm,0.004 max. (0.1M solution) at 280nm
Name Note 1M Solution, pH 7.3
CAS 7732-18-5
Protease Protease free
pH 7.2 to 7.5
Synonym N-(2-Hydroxyethyl)piperazine-N«-2-ethanesulfonic Acid
Purity Grade Notes DNase-, RNase- and Protease-Free
Recommended Storage RT
Molecular Formula C8H18N2O4S
Formula Weight 238.197
13
Promotions Available

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

EDGE
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
14
Promotions Available

Buffer Concentrate, pH 7.00 (Certified), Fisher Chemical™

EDGE
CAS 7664-38-2
Molecular Weight (g/mol) 380.17
MDL Number MFCD00146206
Traceability to NIST Traceable to NIST.
Packaging Poly Bottle
Physical Form Liquid
Chemical Name or Material Buffer Concentrate, pH 7.00
Grade Certified
Identification Pass Test
InChI Key UEUXEKPTXMALOB-UHFFFAOYSA-J
Molecular Formula C10H12N2Na4O8
ChemAlert Storage Symbol Gray
15
Promotions Available

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

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

EDGE
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