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 (5,004)

Matrix Blanks and Standardization Solutions (4,282)

Chromatography Standards (2,085)

Spectroscopy Standards (1,867)

Life Science Buffers (1,517)

Electrochemistry Buffers (1,297)

Electrochemistry Standards (653)

Environmental Testing Standards (596)

Karl Fischer Buffers and Reagents (153)

Quality Control and Proficiency Samples (111)

Viscosity Standards (42)

Gel Filtration Standards (36)

Kjeldahl Buffers and Reagents (22)

Isotope Standards (10)

Smoke Point Reference (9)

Matrix Modifiers (7)

Osmolality Standards (2)

Polarimetric Standards (2)

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1 – 15 of 14,443 results

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Hydrogen Peroxide (30% in Water), Fisher BioReagents

CAS: 7722-84-1 Molecular Formula: H2O2 Molecular Weight (g/mol): 34.014 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
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

Poly(ethyleneimine) Solution, 50% (w/v) in Water, MilliporeSigma™ Supelco™

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Specifications

Type	Analytical Standard
CAS	9002-98-6
Grade	Analytical Standard
Synonym	Ethyleneimine polymer solution; PEI
Concentration	50% (w/v) in H 2 O

EP Reference Solution BY₆, Brownish-Yellow Reference Solution, Ricca Chemical

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TBS, Tris Buffered Saline, 1X Solution, pH 7.4, Molecular Biology, Fisher BioReagents

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Specifications

Boiling Point	100°C
Name Note	1X Solution, pH 7.4
CAS	77-86-1
Protease	Protease free
Color	Colorless
Physical Form	Liquid
Chemical Name or Material	Tris Buffered Saline
Grade	Molecular Biology
Synonym	TBS
DNase	DNase free
Recommended Storage	RT
ChemAlert Storage Symbol	Gray

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

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

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Specifications

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

Fehling's Copper Solution (Fehling Solution A), Ricca Chemical

For Determination of Reducing Sugars

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Specifications

Name Note	Fehling Solution A
CAS	7732-18-5
Color	Blue
Physical Form	Liquid
pH	∼4
Chemical Name or Material	Fehling's Copper Solution
Grade	Laboratory

Fehling's Alkaline Solution (Fehling Solution B), Ricca Chemical

For Determination of Reducing Sugars

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Specifications

Name Note	Fehling Solution B
CAS	7732-18-5
Color	Colorless
Physical Form	Liquid
pH	>12
Chemical Name or Material	Fehling's Alkaline Solution
Grade	Laboratory

Mettler Toledo™ Buffer Solutions: Standard pH

Storage and refill solutions for pH electrodes

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Specifications

Includes	Quality inspection certificate
Boiling Point	∼100°C

EP Reference Solution BY₅, Brownish-Yellow Reference Solution, Ricca Chemical

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KCl Electrolyte Solution, METTLER TOLEDO™

Maintenance and pH electrolyte solution

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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++]

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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

Gibco™ Sodium Hydroxide (NaOH) Solutions, 0.1–1.0 M

Gibco NaOH solutions offer more options for supply security and dual sourcing of the highest volume process liquid in bioprocessing manufacturing.

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Specifications

Boiling Point	100°C
Percent Purity	95 to 100%
CAS	1310-73-2
Color	Clear
Packaging	Bioprocess Container
pH	≥12 to ≤14
Chemical Name or Material	Sodium Hydroxide
Grade	Compendial
Synonym	Caustic soda, Acidity regulatory, Lye or Soda lye
Shelf Life	12 months
Melting Point	0°C

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

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

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Specifications

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

EP Color Standard BY/Reference Solution BY₁, Brownish-Yellow Standard Solution, Ricca Chemical

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

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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

Buffers and Standards

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Hydrogen Peroxide (30% in Water), Fisher BioReagents GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Mettler Toledo™ Buffer Solutions: Standard pH Greener ChoiceOffers one or more environmental benefits itemized in the U.S. FTC “Green Guides.”Learn More

Gibco™ Sodium Hydroxide (NaOH) Solutions, 0.1–1.0 M Greener ChoiceOffers one or more environmental benefits itemized in the U.S. FTC “Green Guides.”Learn More

Buffer Solution, pH 10.00 (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

Hydrogen Peroxide (30% in Water), Fisher BioReagents

Mettler Toledo™ Buffer Solutions: Standard pH

Gibco™ Sodium Hydroxide (NaOH) Solutions, 0.1–1.0 M

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

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