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 (4,042)

Spectroscopy Standards (2,557)

Matrix Blanks and Standardization Solutions (1,735)

Life Science Buffers (1,246)

Electrochemistry Buffers (1,058)

General Chemistry Solutions (692)

Environmental Testing Standards (436)

Electrochemistry Standards (344)

Karl Fischer Buffers and Reagents (255)

Viscosity Standards (243)

Isotope Standards (86)

Osmolality Standards (14)

Kjeldahl Buffers and Reagents (14)

Quality Control and Proficiency Samples (12)

Matrix Modifiers (4)

1 – 15 of 9,379 results

Thermo Scientific™ Orion™ pH Buffer Bottles

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

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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

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

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Specifications

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

Manganese, AAS standard solution, Specpure™ Mn 1000μg/mL, Thermo Scientific Chemicals

CAS: 7439-96-5 Molecular Formula: Mn Molecular Weight (g/mol): 54.94 MDL Number: MFCD00011111 InChI Key: PWHULOQIROXLJO-UHFFFAOYSA-N PubChem CID: 23930 ChEBI: CHEBI:35154 IUPAC Name: manganese SMILES: [Mn]

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Specifications

PubChem CID	23930
CAS	7439-96-5
Molecular Weight (g/mol)	54.94
ChEBI	CHEBI:35154
MDL Number	MFCD00011111
SMILES	[Mn]
IUPAC Name	manganese
InChI Key	PWHULOQIROXLJO-UHFFFAOYSA-N
Molecular Formula	Mn

Buffer solution, pH 13.00 (+/-0.026 @ 25°C), No Color, Specpure, NIST Traceable, Thermo Scientific Chemicals

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Specifications

Name Note	NIST Traceable
Health Hazard 3	P264b-P280-P302+P352-P305+P351+P338-P332+P313-P362
Solubility	Miscible with water
Color	Colorless
MDL Number	MFCD03458582
Health Hazard 2	GHS H Statement H315-H319 Causes skin irritation. Causes serious eye irritation.
Physical Form	Liquid
Health Hazard 1	H315-H319
Chemical Name or Material	Buffer solution, pH 13.00 (±0.01 at 25°C)
Grade	Specpure™
TSCA	Yes
Recommended Storage	Ambient temperatures

Potassium chloride, 0.010M, Conductivity Standard, Thermo Scientific Chemicals

CAS: 7447-40-7 Molecular Formula: ClK Molecular Weight (g/mol): 74.55 MDL Number: MFCD00011360 InChI Key: WCUXLLCKKVVCTQ-UHFFFAOYSA-M PubChem CID: 4873 ChEBI: CHEBI:32588 SMILES: [Cl-].[K+]

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Specifications

PubChem CID	4873
CAS	7447-40-7
Molecular Weight (g/mol)	74.55
ChEBI	CHEBI:32588
MDL Number	MFCD00011360
SMILES	[Cl-].[K+]
InChI Key	WCUXLLCKKVVCTQ-UHFFFAOYSA-M
Molecular Formula	ClK

Benzalkonium chloride, alkyl distribution C8-C16, 50 wt% aqueous solution, Thermo Scientific Chemicals

CAS: 8001-54-5 Molecular Formula: C9H13ClN Molecular Weight (g/mol): 170.66 MDL Number: MFCD00145757 Synonym: Alkyl-benzyl-dimethylammonium chloride

Pricing and Availability
Specifications

CAS	8001-54-5
Molecular Weight (g/mol)	170.66
MDL Number	MFCD00145757
Synonym	Alkyl-benzyl-dimethylammonium chloride
Molecular Formula	C9H13ClN

Lead standard solution, for AAS, 1mg/mL Pb in 2% HNO₃, Thermo Scientific Chemicals

Pricing and Availability
Specifications

Boiling Point	101.0°C
Molecular Weight (g/mol)	331.20
ChEBI	CHEBI:37187
Color	Brown to Red or Green
Physical Form	Powder/Crystals
Chemical Name or Material	Lead standard solution
Grade	AAS
SMILES	[Pb++].[O-][N+]([O-])=O.[O-][N+]([O-])=O
Merck Index	15, 5469
Concentration	997 to 1003 μg/mL of Pb(2+) in 2 to 5% HNO3 (20°C)
InChI Key	RLJMLMKIBZAXJO-UHFFFAOYSA-N
Density	1.0200g/mL
PubChem CID	24924
Name Note	1 mg/ml Pb in 2% HNO3
CAS	7732-18-5
Health Hazard 3	GHS P Statement: Keep only in original container. 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. Avoid breathing dust/fume/gas/mist/vapors/spray. Wash face, hands and any exposed skin thoroughly after handling. IF ON SKIN: Wash with plenty of soap and water. WARNING: The information provided on this web site was developed in compliance with European Union (EU) regulations and is correct to the best of our knowledge, information and belief at the date of its publication. The information given is designed only as a guide for safe handling and use. It is not to be considered as either a warranty or quality specification.
MDL Number	MFCD00011153
Health Hazard 2	GHS H Statement: Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation. May be corrosive to metals.
Health Hazard 1	Danger
Packaging	Plastic bottle
IUPAC Name	λ²-lead(2+) dinitrate
Molecular Formula	N2O6Pb
Formula Weight	331.21
Melting Point	-3.0°C
Specific Gravity	1.02

Nickel standard solution, for AAS, 1 mg/ml Ni in 2% HNO3, Thermo Scientific Chemicals

Pricing and Availability
Specifications

Molecular Weight (g/mol)	58.69
ChEBI	CHEBI:28112
Solubility	Soluble in water
Color	Green
Physical Form	Crystals, Crystalline Powder and/or Chunks
CAS Min %	96.9
Chemical Name or Material	Nickel standard solution
Grade	AAS
SMILES	[Ni]
Concentration	990 to 1010 μg/mL Ni in 2 to 5% HNO3 (20°C)
InChI Key	PXHVJJICTQNCMI-UHFFFAOYSA-N
Density	1.0320g/mL
PubChem CID	935
Name Note	1 mg/ml Ni in 2% HNO3
CAS	7732-18-5
Health Hazard 3	GHS P Statement Wear protective gloves/protective clothing/eye protection/face protection. IF SWALLOWED: rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower. 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. Keep only in original container.
MDL Number	MFCD00011137 MFCD06798735
Health Hazard 2	GHS H Statement May cause cancer by inhalation. May damage the unborn child. Causes severe skin burns and eye damage. May produce an allergic reaction. Harmful to aquatic life with long lasting effects. May be corrosive to metals.
Health Hazard 1	Danger
Packaging	Plastic bottle
IUPAC Name	nickel
Molecular Formula	Ni
Formula Weight	58.69
Specific Gravity	1.032
CAS Max %	97.1

Bromine, 1M solution in acetic acid, Thermo Scientific Chemicals

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Specifications

Linear Formula	Br₂
Molecular Weight (g/mol)	79.91
ChEBI	CHEBI:29224
Color	Red
Physical Form	Liquid
Chemical Name or Material	Bromine
SMILES	[Br-]
Merck Index	15, 1401
Concentration	0.90 to 1.10M
InChI Key	CPELXLSAUQHCOX-UHFFFAOYSA-M
Density	3.111
PubChem CID	24408
Name Note	1M solution in acetic acid
CAS	64-19-7
Health Hazard 3	GHS P Statement Wear protective gloves/protective clothing/eye protection/face protection. IF SWALLOWED: rinse mouth. Do NOT induce vomiting. Keep away from heat/sparks/open flames/hot surfaces. - No smoking. 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. Avoid release to the environment.
MDL Number	MFCD00010896
Health Hazard 2	GHS P Statement Fatal if inhaled. Causes severe skin burns and eye damage. Very toxic to aquatic life. Flammable liquid and vapor.
Flash Point	40°C
Solubility Information	Solubility in water: soluble.
Health Hazard 1	GHS Signal Word: Danger
Synonym	bromine,dibromine,brom,bromine solution,brome,bromo,broom,bromine water,bromo italian,bromo spanish
IUPAC Name	bromide
Molecular Formula	Br
Formula Weight	159.82

Thermo Scientific Chemicals Iodine, 0.1N Standardized Solution

CAS: 7553-56-2 Molecular Formula: I2 Molecular Weight (g/mol): 253.81 MDL Number: MFCD00011355 MFCD00164163 InChI Key: PNDPGZBMCMUPRI-UHFFFAOYSA-N PubChem CID: 807 ChEBI: CHEBI:17606 SMILES: II

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Specifications

PubChem CID	807
CAS	7553-56-2
Molecular Weight (g/mol)	253.81
ChEBI	CHEBI:17606
MDL Number	MFCD00011355 MFCD00164163
SMILES	II
InChI Key	PNDPGZBMCMUPRI-UHFFFAOYSA-N
Molecular Formula	I2

Oxalic acid, 10% w/v aq. soln., Thermo Scientific Chemicals

CAS: 144-62-7 Molecular Formula: C2H2O4 Molecular Weight (g/mol): 90.034 MDL Number: MFCD00002573 InChI Key: MUBZPKHOEPUJKR-UHFFFAOYSA-N PubChem CID: 971 ChEBI: CHEBI:16995 IUPAC Name: oxalic acid SMILES: C(=O)(C(=O)O)O

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Specifications

PubChem CID	971
CAS	144-62-7
Molecular Weight (g/mol)	90.034
ChEBI	CHEBI:16995
MDL Number	MFCD00002573
SMILES	C(=O)(C(=O)O)O
IUPAC Name	oxalic acid
InChI Key	MUBZPKHOEPUJKR-UHFFFAOYSA-N
Molecular Formula	C2H2O4

Gibco™ Opti-Plex™ Complexation Buffer

Opti-Plex Complexation Buffer is a cGMP-manufactured, chemically defined, animal origin-free (AOF), methionine-free, biotin-free, low-protein transfection complexation buffer based on Opti-MEM I Reduced Serum Medium

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Sodium thiosulfate, 1.0N Standardized Solution, Thermo Scientific Chemicals

CAS: 7772-98-7 Molecular Formula: Na2O3S2 Molecular Weight (g/mol): 158.10 MDL Number: MFCD00003499 InChI Key: AKHNMLFCWUSKQB-UHFFFAOYSA-L PubChem CID: 24477 IUPAC Name: disodium sulfanidesulfonate SMILES: [Na+].[Na+].[O-]S([S-])(=O)=O

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Specifications

PubChem CID	24477
CAS	7772-98-7
Molecular Weight (g/mol)	158.10
MDL Number	MFCD00003499
SMILES	[Na+].[Na+].[O-]S([S-])(=O)=O
IUPAC Name	disodium sulfanidesulfonate
InChI Key	AKHNMLFCWUSKQB-UHFFFAOYSA-L
Molecular Formula	Na2O3S2

Sodium bicarbonate, 1M buffer soln., pH 8.0, Thermo Scientific Chemicals

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 SMILES: [Na+].OC([O-])=O

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Specifications

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

pH Buffers, Twin Neck, Fisherbrand™

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

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Pricing and Availability
Specifications

For Use With (Application)	pH calibration

Buffers and Standards

Buffers and Standards

Thermo Scientific™ Orion™ pH Buffer Bottles

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

Manganese, AAS standard solution, Specpure™ Mn 1000μg/mL, Thermo Scientific Chemicals

Buffer solution, pH 13.00 (+/-0.026 @ 25°C), No Color, Specpure, NIST Traceable, Thermo Scientific Chemicals

Potassium chloride, 0.010M, Conductivity Standard, Thermo Scientific Chemicals

Benzalkonium chloride, alkyl distribution C8-C16, 50 wt% aqueous solution, Thermo Scientific Chemicals

Lead standard solution, for AAS, 1mg/mL Pb in 2% HNO₃, Thermo Scientific Chemicals

Nickel standard solution, for AAS, 1 mg/ml Ni in 2% HNO3, Thermo Scientific Chemicals

Bromine, 1M solution in acetic acid, Thermo Scientific Chemicals

Thermo Scientific Chemicals Iodine, 0.1N Standardized Solution

Oxalic acid, 10% w/v aq. soln., Thermo Scientific Chemicals

Gibco™ Opti-Plex™ Complexation Buffer

Sodium thiosulfate, 1.0N Standardized Solution, Thermo Scientific Chemicals

Sodium bicarbonate, 1M buffer soln., pH 8.0, Thermo Scientific Chemicals

pH Buffers, Twin Neck, Fisherbrand™

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