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 (19,888)

Spectroscopy Standards (6,249)

General Chemistry Solutions (5,123)

Matrix Blanks and Standardization Solutions (4,193)

Life Science Buffers (3,692)

Electrochemistry Buffers (2,272)

Environmental Testing Standards (1,953)

Electrochemistry Standards (1,206)

Karl Fischer Buffers and Reagents (500)

Viscosity Standards (248)

Isotope Standards (202)

Quality Control and Proficiency Samples (185)

Kjeldahl Buffers and Reagents (103)

Gel Filtration Standards (60)

Matrix Modifiers (32)

Osmolality Standards (11)

Smoke Point Reference (7)

Polarimetric Standards (3)

76 – 90 of 40,373 results

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

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Specifications

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

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Buffer Solution, pH 8.00 (Certified), Fisher Chemical™

Potassium Phosphate Monobasic/Sodium Hydroxide

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Specifications

CAS	7732-18-5
Health Hazard 3	Emergency Overview Irritating to eyes and skin. 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. 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. Get medical attention immediately if symptoms occur. Do not induce vomiting. Do not induce vomiting. Obtain medical attention. NFPA Health:2 Flammability:0 Instability:0
MDL Number	MFCD00147253
Health Hazard 2	WARNING!
Traceability to NIST	Traceable to NIST.
Physical Form	Liquid
pH	8.0
Chemical Name or Material	Buffer Solution, pH 8.00
Grade	Certified
Identification	Pass Test
ChemAlert Storage Symbol	Gray

Fisher Chemical Hydrogen Peroxide, 30% (Certified ACS), Thermo Scientific™

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

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Specifications

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

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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

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Potassium Iodide Solution (10% W/v), 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-]

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Specifications

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

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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+]

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Specifications

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

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

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

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Specifications

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

Fisher Chemical Tris Hydrochloride, 1M Solution (pH 8.0/Mol. Biol.), Fisher BioReagents™

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

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Specifications

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

Hydrogen Peroxide, 50% (Certified), Fisher Chemical

Pricing & Availability
Specifications

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

FisherTab™ MT-37 Kjeldahl Tablets, Fisher Chemical

Composition per tablet: 3.5g K₂SO₄ + 0.175g HgO

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FisherTab™ TT-43 Kjeldahl Tablets, Fisher Chemical

Composition per tablet: 4.18g K₂SO₄ + 0.0025g CuSO₄ + 0.15g TiO₂

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Karl Fischer Aqualine™ Titrant 5, for Karl Fischer Titration By Volumetry, Fisher Chemical

For two-component system. Water equivalent: 5.0mg H₂O/mL

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Karl Fischer Aqualine™ Sodium Tartrate-2H2O, for Karl Fischer Titration, Fisher Chemical

Molecular Formula: C4H8Na2O8 Molecular Weight (g/mol): 230.08 MDL Number: MFCD00150035 InChI Key: FGJLAJMGHXGFDE-UDMGOBQRNA-L PubChem CID: 131855972 IUPAC Name: (2R,3R)-2,3-dihydroxybutanedioic acid;sodium;dihydrate SMILES: O.O.[Na+].[Na+].O[C@H]([C@@H](O)C([O-])=O)C([O-])=O

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Specifications

PubChem CID	131855972
Molecular Weight (g/mol)	230.08
MDL Number	MFCD00150035
SMILES	O.O.[Na+].[Na+].O[C@H]([C@@H](O)C([O-])=O)C([O-])=O
IUPAC Name	(2R,3R)-2,3-dihydroxybutanedioic acid;sodium;dihydrate
InChI Key	FGJLAJMGHXGFDE-UDMGOBQRNA-L
Molecular Formula	C4H8Na2O8

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Fisher Chemical MES (Fine White Crystals), Fisher BioReagents

CAS: 145224-94-8 Molecular Formula: C6H15NO5S Molecular Weight (g/mol): 213.248 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-ylethanesulfonic acid;hydrate SMILES: C1COCCN1CCS(=O)(=O)O.O

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Specifications

PubChem CID	16218417
CAS	145224-94-8
Molecular Weight (g/mol)	213.248
SMILES	C1COCCN1CCS(=O)(=O)O.O
Synonym	2-(4-Morpholino)ethane Sulfonic Acid,2-(N-Morpholino)ethanesulfonic acid hydrate
IUPAC Name	2-morpholin-4-ylethanesulfonic acid;hydrate
InChI Key	MIIIXQJBDGSIKL-UHFFFAOYSA-N
Molecular Formula	C6H15NO5S

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Buffer Solution Concentrate, pH 6.00 (Certified), Fisher Chemical

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Buffers and Standards

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Buffer Solution, pH 8.00 (Certified), Fisher Chemical™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Fisher Chemical Hydrogen Peroxide, 30% (Certified ACS), Thermo Scientific™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Hydrogen Peroxide, Fisher Chemical™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Sodium Thiosulfate Pentahydrate Solution (0.1N (N/10)/Certified), Fisher Chemical™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Fisher Chemical Tris Hydrochloride, 1M Solution (pH 8.0/Mol. Biol.), Fisher BioReagents™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Hydrogen Peroxide, 50% (Certified), Fisher Chemical GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer Solution, pH 8.00 (Certified), Fisher Chemical™

Fisher Chemical Hydrogen Peroxide, 30% (Certified ACS), Thermo Scientific™

Hydrogen Peroxide, Fisher Chemical™

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

Fisher Chemical Tris Hydrochloride, 1M Solution (pH 8.0/Mol. Biol.), Fisher BioReagents™

Hydrogen Peroxide, 50% (Certified), Fisher Chemical