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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

 

Chromatography Standards (6,428)
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Electrochemistry Buffers (987)
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Karl Fischer Buffers and Reagents (186)
Kjeldahl Buffers and Reagents (57)
Viscosity Standards (42)
Quality Control and Proficiency Samples (17)
Isotope Standards (4)
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Keyword Search:
1 – 15 of 11,777 results
1
Promotions Available

Sodium Hypochlorite Solution (4-6%/Laboratory), Fisher Chemical™

CAS: 7681-52-9 Molecular Formula: ClNaO Molecular Weight (g/mol): 74.439 MDL Number: MFCD00011120 InChI Key: SUKJFIGYRHOWBL-UHFFFAOYSA-N Synonym: sodium hypochlorite,antiformin,sodium oxychloride,chlorox,clorox,javex,javelle water,hypochlorous acid, sodium salt,hypochlorite sodium,carrel-dakin solution PubChem CID: 23665760 ChEBI: CHEBI:32146 IUPAC Name: sodium;hypochlorite SMILES: [O-]Cl.[Na+]

PubChem CID 23665760
CAS 7681-52-9
Molecular Weight (g/mol) 74.439
ChEBI CHEBI:32146
MDL Number MFCD00011120
SMILES [O-]Cl.[Na+]
Synonym sodium hypochlorite,antiformin,sodium oxychloride,chlorox,clorox,javex,javelle water,hypochlorous acid, sodium salt,hypochlorite sodium,carrel-dakin solution
IUPAC Name sodium;hypochlorite
InChI Key SUKJFIGYRHOWBL-UHFFFAOYSA-N
Molecular Formula ClNaO
2
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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+]

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
4
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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
5
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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
6
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HEPES (Fine White Crystals/Molecular Biology), Fisher BioReagents™

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

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
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Hydrogen Peroxide, 3% (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

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
8

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.

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
9

Traceable™ One-Shot™ Conductivity Calibration Standards Certified Reference Material Producer (CRM), Fisherbrand™

Ideal for lab or field applications

For Use With (Equipment) Conductivity Meter
Solubility Soluble in water
Color Clear
Packaging 6/Pk.
Chemical Name or Material Conductivity Standard
10
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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
11
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Silver Nitrate Solution (0.1N (N/10)/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

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

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
13
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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+]

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
14
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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
15
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