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 (24,051)

Spectroscopy Standards (5,659)

General Chemistry Solutions (5,035)

Matrix Blanks and Standardization Solutions (4,282)

Life Science Buffers (4,126)

Electrochemistry Buffers (2,328)

Environmental Testing Standards (1,865)

Electrochemistry Standards (1,229)

Karl Fischer Buffers and Reagents (467)

Isotope Standards (376)

Viscosity Standards (251)

Quality Control and Proficiency Samples (206)

Kjeldahl Buffers and Reagents (90)

Gel Filtration Standards (57)

Matrix Modifiers (29)

Osmolality Standards (12)

Smoke Point Reference (10)

Polarimetric Standards (6)

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Available on GSA/VA Contract (382)
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Production Products (191)
Science Education (205)
Small and Specialty Supplier (7,020)

Grade

AAS (66)
ACS (194)
ACS Reagent (25)
ACS/ASTM E 200/AOAC/EPA (7)
ACS/ASTM E 200/AOAC/USP Volumetric (5)
APHA/EPA (5)
APHA/Hazen (5)

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Molecular Weight (g/mol)

0.00 (1)
10.81 (14)
100.09 (33)
100.117 g/mol (1)
100.12 (1)
100.121 (1)
100.15 (1)

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Quantity

0.1 mol (1)
0.5 L (1)
0.5 mL (15)
0.5 mol (1)
1 Bottle (5)
1 Box (1)
1 Ea. (4)

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Percent Purity

≥ 4400 Units/mg (Nystatin) ≥ 5000 Units/mg (Nystatin) (1) (8)
≥ 85.0 % (1)
≥14% (BF3) (1)
≥30% (RT) (1)
≥30% (titration) (1)
≥35% (RT) (1)
≥40% (3)

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pH

≥12 to ≤14 (6)
>11.5 (1)
>12 (44)
>13 (97)
>8 (1)
<0.5 (3)
<1 (97)

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Solvent or Matrix

#2 Diesel Fuel (12)
10% HCl (19)
10% HCl/1% HNO₃ (1)
10% HNO3 (13)
15% HCl (3)
15% HNO₃ (2)
2% HCl (29)

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Concentration

≈0.000027 M (3)
≈0.0035 M (3)
≥30% (1)
≤0.1% in nitric acid (1)
≤2.5% KCl (T) (8)
0.00017 M (3)
0.001 M KCl (1)

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Physical Form

Aqueous Solution (37)
Capsule (11)
Chemvelope (1)
Clear Liquid (1)
Clear Liquid at 20°C (2)
Colorless Liquid (1)
Crystalline (22)

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Solution Type

Antigen Retrieval Reagent (1)
Aqueous (3)
Buffer (587)
Buffer, Storage (4)
Calibration (8)
Cleaning, Storage, pH Buffer (15)
Colored pH Buffer (43)

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For Use With (Application)

Accurate calibrations and NIST traceability (1)
Accurate calibrations and NIST traceability, laboratory and bench analysis (2)
Accurate calibrations and NIST traceability, portable and field analysis (1)
Accurate pH calibrations and NIST traceability, laboratory and bench analysis (8)
Accurate pH calibrations and NIST traceability, portable and field analysis (6)
Accurate, reproducible pH calibrations (15)
Agarose Gel Electrophoresis, Polyacrylamide Gel Electrophoresis (10)

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Search Within Results

76 – 90 of 44,446 results

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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

Pricing & Availability
Specifications

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

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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 3.00 (Certified), Fisher Chemical™

Pricing & Availability
Specifications

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

Traceable™ One-Shot™ pH Buffer Standards pH Certified Reference Material (CRM), Fisherbrand™

Performs accurate, reproducible pH calibrations with color-coded bottles. Traceable™ Color-Coded buffers are Certified Reference Material pH Buffers. Compatible with all makes of pH instruments and electrodes.

Pricing & Availability
Specifications

For Use With (Equipment)	pH Meter and Electrode
Traceability to NIST	Certified and Traceable™
Physical Form	Liquid
Quantity	6 x 100 mL
For Use With (Application)	Calibration
Solution Type	Buffer

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.

Pricing & Availability
Specifications

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

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

Pricing & Availability
Specifications

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

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Buffer Concentrate, pH 11.00 (Certified), Fisher Chemical

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Buffer Solution, pH 7.40 (Certified), Fisher Chemical™

Potassium Phosphate Monobasic/Sodium Hydroxide

Pricing & Availability
Specifications

Boiling Point	100°C
CAS	7732-18-5
MDL Number	MFCD00134130
Traceability to NIST	Traceable to NIST.
Packaging	Poly Bottle
Physical Form	Liquid
pH	7.4
Chemical Name or Material	Buffer Solution, pH 7.40
Grade	Certified
Identification	Pass Test
ChemAlert Storage Symbol	Gray
Density	1.0g/cm³
Melting Point	0°C

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Buffer Solution, pH 9.00 (Certified), Fisher Chemical™

Boric Acid/Potassium Chloride/Sodium Hydroxide

Pricing & Availability
Specifications

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

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Tris Hydrochloride (Small White Flakes/Molecular Biology), Fisher BioReagents

CAS: 1185-53-1 Molecular Formula: C4H12ClNO3 Molecular Weight (g/mol): 157.594 InChI Key: QKNYBSVHEMOAJP-UHFFFAOYSA-N Synonym: Tris(hydroxymethyl)aminomethane Hydrochloride PubChem CID: 93573 IUPAC Name: 2-amino-2-(hydroxymethyl)propane-1,3-diol;hydrochloride SMILES: C(C(CO)(CO)N)O.Cl

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Specifications

PubChem CID	93573
CAS	1185-53-1
Molecular Weight (g/mol)	157.594
SMILES	C(C(CO)(CO)N)O.Cl
Synonym	Tris(hydroxymethyl)aminomethane Hydrochloride
IUPAC Name	2-amino-2-(hydroxymethyl)propane-1,3-diol;hydrochloride
InChI Key	QKNYBSVHEMOAJP-UHFFFAOYSA-N
Molecular Formula	C4H12ClNO3

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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

Pricing & Availability
Specifications

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

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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-]

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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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Bis-Tris, Fisher BioReagents

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

Pricing & Availability
Specifications

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

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Tris Hydrochloride, 1M Solution (pH 7.5/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

Pricing & Availability
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

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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++]

Pricing & Availability
Specifications

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

Buffers and Standards

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Buffer Solution, pH 3.00 (Certified), Fisher Chemical™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer Solution, pH 4.00 (Certified), Fisher Chemical™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer Solution, pH 7.40 (Certified), Fisher Chemical™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer Solution, pH 9.00 (Certified), Fisher Chemical™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Bis-Tris, Fisher BioReagents GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Tris Hydrochloride, 1M Solution (pH 7.5/Mol. Biol.), Fisher BioReagents™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

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

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

Buffer Solution, pH 7.40 (Certified), Fisher Chemical™

Buffer Solution, pH 9.00 (Certified), Fisher Chemical™

Bis-Tris, Fisher BioReagents

Tris Hydrochloride, 1M Solution (pH 7.5/Mol. Biol.), Fisher BioReagents™