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Electrochemistry Buffers

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

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Buffer solution pH 4, Citrate buffer

CAS: 68-04-2 | C8H5KO4

EDGE
Name Note Phthalate buffer
CAS 7732-18-5
MDL Number MFCD00130806
Color Colorless
Traceability to NIST Traceable to NIST
Packaging Plastic bottle
Physical Form Liquid
pH 3.98 to 4.02 (20°C)
Chemical Name or Material Buffer solution pH 4
Molecular Formula C8H5KO4
Formula Weight 204.23
2

Buffer Colour Coded Solution pH10.00 (Borate) Blue, NIST Standard Solution ready to use for pH measurement, Fisher Chemical™

CAS: 10043-35-3 Molecular Formula: BH3O3 Molecular Weight (g/mol): 61.83 InChI Key: KGBXLFKZBHKPEV-UHFFFAOYSA-N IUPAC Name: boric acid SMILES: OB(O)O

EDGE
CAS 10043-35-3
Molecular Weight (g/mol) 61.83
SMILES OB(O)O
IUPAC Name boric acid
InChI Key KGBXLFKZBHKPEV-UHFFFAOYSA-N
Molecular Formula BH3O3
3

Thermo Scientific Chemicals Sodium phosphate, 0.2M buffer soln., pH 7.0

EDGE
MDL Number MFCD00146206
Solubility Information Fully miscible.
Physical Form Liquid
pH 7.0
Chemical Name or Material Sodium phosphate buffer soln.
TSCA Yes
Recommended Storage Ambient temperatures
Concentration 0.2 M
4

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

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

EDGE
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
5

Thermo Scientific Chemicals 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

EDGE
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
6

Buffer solution pH 7, Phosphate buffer

CAS: 7558-79-4 | H2KO4P

CAS 7732-18-5
MDL Number MFCD03097944
Packaging Plastic bottle
Chemical Name or Material Buffer solution pH 7
Merck Index 14, 7659
Molecular Formula H2KO4P
Formula Weight 136.09
Vapor Pressure 14mmHg at 20°C
7

Buffer solution pH 7.0 (20°C), Green colored, potassium dihydrogen phosphate / disodium hydrogen phosphate, with fungicide, Honeywell Fluka™

CAS: 1336-21-6 Molecular Formula: H5NO Molecular Weight (g/mol): 35.05 InChI Key: VHUUQVKOLVNVRT-UHFFFAOYSA-N PubChem CID: 14923 ChEBI: CHEBI:18219 IUPAC Name: azanium;hydroxide SMILES: N.O

EDGE
PubChem CID 14923
CAS 1336-21-6
Molecular Weight (g/mol) 35.05
ChEBI CHEBI:18219
SMILES N.O
IUPAC Name azanium;hydroxide
InChI Key VHUUQVKOLVNVRT-UHFFFAOYSA-N
Molecular Formula H5NO
8

Buffer solution pH 4.0 (20°C), Red colored, citric acid / sodium hydroxide / sodium chloride solution, with fungicide, Honeywell Fluka™

CAS: 1336-21-6 Molecular Formula: H5NO Molecular Weight (g/mol): 35.05 MDL Number: MFCD00066650 InChI Key: VHUUQVKOLVNVRT-UHFFFAOYSA-N PubChem CID: 14923 ChEBI: CHEBI:18219 SMILES: N.O

EDGE
PubChem CID 14923
CAS 1336-21-6
Molecular Weight (g/mol) 35.05
ChEBI CHEBI:18219
MDL Number MFCD00066650
SMILES N.O
InChI Key VHUUQVKOLVNVRT-UHFFFAOYSA-N
Molecular Formula H5NO
9
Promotions Available

Buffer solution, 12.0, di-sodium hydrogen phosphate / sodium hydroxide solution, Honeywell Fluka™

CAS: 1336-21-6 Molecular Formula: H5NO Molecular Weight (g/mol): 35.05 MDL Number: MFCD00066650 InChI Key: VHUUQVKOLVNVRT-UHFFFAOYSA-N PubChem CID: 14923 ChEBI: CHEBI:18219 IUPAC Name: azanium;hydroxide SMILES: N.O

EDGE
PubChem CID 14923
CAS 1336-21-6
Molecular Weight (g/mol) 35.05
ChEBI CHEBI:18219
MDL Number MFCD00066650
SMILES N.O
IUPAC Name azanium;hydroxide
InChI Key VHUUQVKOLVNVRT-UHFFFAOYSA-N
Molecular Formula H5NO
10

Thermo Scientific Chemicals Sodium citrate, 0.5M buffer soln., pH 6.0

Health Hazard 3 GHS P Statement
P280-P264-P305+P351+P338-P337+P313
Wear protective gloves/protective clothing/eye protection/face protection.
Wash thoroughly after handling.
IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
If eye irritation persists: Get medical advice/attention.
MDL Number MFCD00012462
Health Hazard 2 GHS H Statement
H319
Causes serious eye irritation.
Color Colorless
Solubility Information Fully miscible in water.
Physical Form Liquid
pH 6.0
Health Hazard 1 Warning
Chemical Name or Material Sodium citrate buffer soln.
TSCA Yes
Recommended Storage Keep cold
Concentration 0.5 M
Odor Odorless
11

Thermo Scientific Chemicals Sodium phosphate, 0.5M buffer soln., pH 7.0

MDL Number MFCD00146206
Solubility Information Fully miscible.
Physical Form Liquid
pH 7.0
Chemical Name or Material Sodium phosphate buffer soln.
TSCA Yes
Recommended Storage Ambient temperatures
Concentration 0.5 M
12

Thermo Scientific Chemicals Sodium phosphate, 0.5M buffer soln., pH 7.5

MDL Number MFCD00146206
Solubility Information Soluble in water (121mg/ml at 20°C).
Physical Form Liquid
pH 7.5
Chemical Name or Material Sodium phosphate buffer soln.
TSCA Yes
Recommended Storage Ambient temperatures
Concentration 0.5 M
13

Thermo Scientific Chemicals Sodium phosphate, 0.2M buffer soln., pH 8.5

MDL Number MFCD00146206
Solubility Information Soluble in water (121mg/ml at 20°C).
Physical Form Liquid
pH 8.5
Chemical Name or Material Sodium phosphate buffer soln.
TSCA Yes
Recommended Storage Ambient temperatures
Concentration 0.2 M
14

Thermo Scientific Chemicals Sodium bicarbonate, 1M buffer soln., pH 9.0

CAS: 144-55-8 Molecular Formula: CHNaO3 Molecular Weight (g/mol): 84.01 MDL Number: MFCD00003528 InChI Key: UIIMBOGNXHQVGW-UHFFFAOYSA-M PubChem CID: 516892 ChEBI: CHEBI:32139 IUPAC Name: sodium;hydrogen carbonate SMILES: [Na+].OC([O-])=O

PubChem CID 516892
CAS 144-55-8
Molecular Weight (g/mol) 84.01
ChEBI CHEBI:32139
MDL Number MFCD00003528
SMILES [Na+].OC([O-])=O
IUPAC Name sodium;hydrogen carbonate
InChI Key UIIMBOGNXHQVGW-UHFFFAOYSA-M
Molecular Formula CHNaO3
15

Thermo Scientific Chemicals Sodium citrate, 0.5M buffer soln., pH 5.0

Health Hazard 3 GHS P Statement
P280-P305+P351+P338-P310
Wear protective gloves/protective clothing/eye protection/face protection.
IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a POISON CENTER or doctor/physician.
MDL Number MFCD00012462
Health Hazard 2 GHS H Statement
H318
Causes serious eye damage.
Color Colorless
Solubility Information It is soluble in water (29.4g/L) at 20°C. Insoluble in ethanol.
Physical Form Liquid
pH 5.0
Health Hazard 1 Danger
Chemical Name or Material Sodium citrate buffer soln.
TSCA No
Recommended Storage Keep cold
Concentration 0.5 M
Odor Odorless