Electrochemistry Buffers

Buffer solutions suitable for use as reference and calibration standards for measuring pH values.

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Technical pH Buffer Solutions, METTLER TOLEDO™

Provides a reliable all-around pH buffer. Mettler Toledo™ Technical pH Buffer Solution are specified to two decimal places and are traceable to NIST standards. Color-coded solution comes in a handy 250mL plastic bottle with no-fuss labels.

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Specifications

For Use With (Equipment)	pH Electrode
Traceability to NIST	Yes
Quantity	250 mL
Grade	Technical
For Use With (Application)	pH measurement, electrode calibration

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Thermo Scientific™ Orion™ pH Buffer Bottles

Perform accurate, reproducible pH calibrations with these color-coded buffer bottles.

Pricing and Availability
Specifications

For Use With (Equipment)	pH Meter and Electrode
Traceability to NIST	Yes
Physical Form	Liquid
Chemical Name or Material	pH Buffer, bottles

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Buffer Solution pH7.00 (Phosphate), NIST Standard Solution ready to use for pH measurement, Fisher Chemical™

MDL Number: 217672

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Specifications

MDL Number	217672

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pH Buffers, Twin Neck, Fisherbrand™

Perform accurate pH calibrations with color-coded, twin neck Fisherbrand™ pH Buffer Bottles.

Pricing and Availability
Specifications

For Use With (Application)	pH calibration

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Thermo Scientific™ Orion™ All-in-One™ pH Buffer Kits

Work with ease using this color-coded pH buffer kit that includes three buffers, storage solution and a storage bottle.

Pricing and Availability
Specifications

Traceability to NIST	Yes
Packaging	Kit

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Thermo Scientific™ Orion™ pH Buffer Individual Use Pouches

Orion™ single-use pH calibration buffers deliver NIST-traceable accuracy for pH meters and electrodes. Designed for GxP labs, these ready-to-use, color-coded buffer pouches support compliant workflows, reduce contamination risk and ensure reliable, traceable pH calibration results.

Pricing and Availability
Specifications

Boiling Point	100°C
For Use With (Equipment)	pH Meter and Electrode, single-use
Solubility Information	Soluble
Traceability to NIST	Yes
Packaging	Pouch
Physical Form	Liquid
Chemical Name or Material	pH Buffer, individual use pouches
For Use With (Application)	pH calibration
Solution Type	Buffer

Buffer solution pH 7, Phosphate buffer, traceable to NIST, ready to use

CAS: 7558-79-4

Pricing and Availability
Specifications

Name Note	Phosphate buffer, traceable to NIST, ready to use
CAS	7647-14-5
MDL Number	MFCD03097944
Solubility Information	Solubility in water: miscible.
Chemical Name or Material	Buffer solution pH 7
Density	1.0000g/mL
Specific Gravity	1

Buffer solution pH 4, Phthalate buffer, traceable to NIST, ready to use

CAS: 877-24-7 | C₈H₅KO₄

Pricing and Availability
Specifications

CAS	7487-94-7
MDL Number	MFCD00217672
Solubility Information	Solubility in water: miscible.
Physical Form	Liquid
Chemical Name or Material	Buffer solution pH 4
Concentration	1.0% (Potassium hydrogen phthalate)
Molecular Formula	C₈H₅KO₄
Formula Weight	204.22

pH 7.01 Calibration Buffer Sachets, Hanna Instruments™

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Technical Buffer pH 11.00, Mettler Toledo™

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Buffer Solution pH6.00 (Phosphate), NIST Standard Solution ready to use for pH measurement, Fisher Chemical™

Buffer Solution pH6.00 (Phosphate), NIST Standard Solution ready to use for pH measurement, Fisher Chemical, Quantity: 1L, CAS: 7778-77-0, Colorless, Packaging: HDPE plastic bottle, pH: 6, MDL Number: 81857, Physical Form: Liquid

Pricing and Availability
Specifications

CAS	7778-77-0
Color	Colorless
Packaging	HDPE plastic bottle
Physical Form	Liquid
pH	6

Thermo Scientific Chemicals Sodium borate, 0.5M buffer soln., pH 8.5

CAS: 1330-43-4 Molecular Formula: B4Na2O7 Molecular Weight (g/mol): 201.21 MDL Number: MFCD00081185 InChI Key: NXSVMNYRVBQCMO-UHFFFAOYSA-N IUPAC Name: disodium bicyclo[3.3.1]tetraboroxane-3,7-bis(ylium)-1,5-diuide-1,5-bis(olate) SMILES: [Na+].[Na+].[O-][B-]12O[B+]O[B-]([O-])(O[B+]O1)O2

Pricing and Availability
Specifications

CAS	1330-43-4
Molecular Weight (g/mol)	201.21
MDL Number	MFCD00081185
SMILES	[Na+].[Na+].[O-][B-]12O[B+]O[B-]([O-])(O[B+]O1)O2
IUPAC Name	disodium bicyclo[3.3.1]tetraboroxane-3,7-bis(ylium)-1,5-diuide-1,5-bis(olate)
InChI Key	NXSVMNYRVBQCMO-UHFFFAOYSA-N
Molecular Formula	B4Na2O7

Buffer solution pH 4.01 (+/-0.022 @ 25oC) No Color Specpure NIST Traceable

CAS: 1336-21-6 | H5NO | 35.05 g/mol

Pricing and Availability
Specifications

Molecular Weight (g/mol)	35.05
ChEBI	CHEBI:18219
Color	Colorless
Physical Form	Liquid
Chemical Name or Material	Buffer solution
SMILES	N.O
InChI Key	VHUUQVKOLVNVRT-UHFFFAOYSA-N
Vapor Pressure	23 hPa (17mm Hg) at 20°C
PubChem CID	14923
MDL Number	MFCD00066650
Solubility Information	Miscible with water.
TSCA	Yes
Recommended Storage	Ambient temperatures
IUPAC Name	azanium;hydroxide
Molecular Formula	H5NO
Odor	Odorless

DuraCal™ Buffer pH 11, Hamilton™

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Potassium phosphate, monobasic, for HPLC

CAS: 7778-77-0 Molecular Formula: H2KO4P Molecular Weight (g/mol): 136.08 MDL Number: MFCD00011401 MFCD00147253 InChI Key: GNSKLFRGEWLPPA-UHFFFAOYSA-M IUPAC Name: potassium dihydrogen phosphate SMILES: [K+].OP(O)([O-])=O

Pricing and Availability
Specifications

CAS	7778-77-0
Molecular Weight (g/mol)	136.08
MDL Number	MFCD00011401 MFCD00147253
SMILES	[K+].OP(O)([O-])=O
IUPAC Name	potassium dihydrogen phosphate
InChI Key	GNSKLFRGEWLPPA-UHFFFAOYSA-M
Molecular Formula	H2KO4P

Electrochemistry Buffers

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Potassium phosphate, monobasic, for HPLC Greener Choice ProductThis product has verified sustainability attributes based on recognized third-party information.Learn More About the Greener Choice Program

Potassium phosphate, monobasic, for HPLC