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 (20,700)

Spectroscopy Standards (6,008)

General Chemistry Solutions (5,155)

Matrix Blanks and Standardization Solutions (4,295)

Life Science Buffers (3,891)

Electrochemistry Buffers (2,284)

Environmental Testing Standards (1,924)

Electrochemistry Standards (1,219)

Karl Fischer Buffers and Reagents (477)

Isotope Standards (335)

Viscosity Standards (256)

Quality Control and Proficiency Samples (209)

Kjeldahl Buffers and Reagents (109)

Gel Filtration Standards (57)

Matrix Modifiers (29)

Osmolality Standards (12)

Smoke Point Reference (9)

Polarimetric Standards (3)

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Science Education (220)
Small and Specialty Supplier (8,863)

Grade

AAS (56)
AAS Standard (11)
ACS (59)
ACS Reagent (26)
ACS/ASTM E 200/AOAC/EPA (7)
ACS/ASTM E 200/AOAC/USP Volumetric (5)
APHA/EPA (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 mL (1)
0.1 mol (1)
0.5 L (1)
0.5 mL (15)
0.5 mol (1)
1 Box (1)
1 Ea. (4)

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Percent Purity

≥14% (BF3) (1)
≥30% (RT) (1)
≥30% (titration) (1)
≥35% (RT) (1)
≥40% (3)
≥49% (2)
≥50% (3)

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pH

≥12 to ≤14 (6)
>11 (1)
>11.5 (3)
>12 (43)
>13 (104)
>8 (1)
<0.5 (3)

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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 (26)
Capsule (11)
Chemvelope (1)
Clear Liquid (1)
Clear Liquid at 20°C (2)
Crystalline (17)
Crystalline Powder (143)

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Technique

AA (473)
AA, ICP (1)
Acidimetry (3)
Calibrating the absorbance of spectrophotometers (1)
Calibration (7)
Calibration and Matrix Spikes (1)
Calibration and Verification (16)

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Solution Type

Antigen Retrieval Reagent (1)
Aqueous (2)
Buffer (411)
Buffer, Storage (2)
Calibration (8)
Cleaning (1)
Colored pH Buffer (35)

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1 – 15 of 41,398 results

Ricca Chemical Company Buffer, Reference Standard, pH 7.00 ± 0.01 at 25°C (Color Coded Yellow), Ricca Chemical

Pricing & Availability
Specifications

CAS	7732-18-5
For Use With (Equipment)	pH Meter and Electrode
Physical Form	Liquid
pH	7
CAS Min %	0.48
Chemical Name or Material	Buffer, Reference Standard
Concentration	1X
For Use With (Application)	Calibration
Solution Type	Colored pH Buffer
CAS Max %	0.5

Ricca Chemical Company Buffer, Reference Standard, pH 4.00 ± 0.01 at 25°C (Color Coded Red), Ricca Chemical

Pricing & Availability
Specifications

Name Note	pH 4.00 ± 0.01 at 25 deg C (Color Coded Red)
CAS	7732-18-5
For Use With (Equipment)	pH Meter and Electrode
Physical Form	Liquid
pH	4
CAS Min %	0.99
Chemical Name or Material	Buffer, Reference Standard
Concentration	1X
For Use With (Application)	Calibration
Solution Type	Colored pH Buffer
CAS Max %	1.03

Fisher Scientific Assorted pH Buffer Pouches, Fisherbrand™

Economical, accurate, convenient

Pricing & Availability

Invitrogen™ TBE (10X), RNase-free

Molecular biology grade, Invitrogen 10X TBE solution is supplied in four bottles containing 1 L each. The buffer is certified RNase-free, economical, and ready-to-use.

Pricing & Availability
Specifications

Chemical Name or Material	Running Buffer
Grade	Molecular Biology
Recommended Storage	Store at room temperature.
Concentration	10X
Product Line	Ambion

Invitrogen™ TAE (10X), RNase-free

Molecular biology grade, Invitrogen 10X TAE is supplied in a 1 L bottle. The buffer is certified RNase-free, economical, and ready-to-use.

Pricing & Availability

Ricca Chemical Company Buffer, Reference Standard, pH 10.00 ± 0.01 at 25°C (Color Coded Blue), Ricca Chemical

Pricing & Availability
Specifications

Boiling Point	100°C
Color	Blue
Physical Form	Liquid
CAS Min %	0.39
Chemical Name or Material	Buffer, Reference Standard
Concentration	1X
For Use With (Application)	Calibration
Name Note	pH 10.00 ± 0.01 at 25 deg C (Color Coded Blue)
CAS	7732-18-5
For Use With (Equipment)	pH Meter and Electrode
Solubility Information	Miscible
pH	10
DOT Information	Not Regulated by DOT
Solution Type	Colored pH Buffer
CAS Max %	0.41
Melting Point	0°C

Fisher Scientific Traceable™ pH Buffer Standards, Certified Reference Material (CRM), Fisherbrand™

IUPAC formulation

Pricing & Availability
Specifications

For Use With (Equipment)	Instruments and Electrodes
Traceability to NIST	Traceable to NIST
Physical Form	Liquid
Chemical Name or Material	pH Buffer Standards
Grade	Certified
Purity Grade Notes	Accuracy at 25°C is ±0010pH
For Use With (Application)	Calibration
ChemAlert Storage Symbol	Gray
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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Thermo Scientific accumet™ Standard All-in-One pH Buffer Kit, Fisherbrand™

Pricing & Availability

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Thiocyanate Standard Solution (0.1N (N/10)/Certified), Fisher Chemical

CAS: 333-20-0 Molecular Formula: CKNS Molecular Weight (g/mol): 97.176 MDL Number: MFCD00011413 InChI Key: ZNNZYHKDIALBAK-UHFFFAOYSA-M Synonym: Potassium Thiocyanate Solutions PubChem CID: 516872 ChEBI: CHEBI:30951 IUPAC Name: potassium;thiocyanate SMILES: C(#N)[S-].[K+]

Pricing & Availability
Specifications

PubChem CID	516872
CAS	333-20-0
Molecular Weight (g/mol)	97.176
ChEBI	CHEBI:30951
MDL Number	MFCD00011413
SMILES	C(#N)[S-].[K+]
Synonym	Potassium Thiocyanate Solutions
IUPAC Name	potassium;thiocyanate
InChI Key	ZNNZYHKDIALBAK-UHFFFAOYSA-M
Molecular Formula	CKNS

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Buffer Solution, pH 2.00 (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 2.00
Grade	Certified
Identification	In Pass Test
ChemAlert Storage Symbol	Gray
Density	1.0g/cm³
CAS	7732-18-5
Health Hazard 3	Emergency Overview May cause skin, eye, and respiratory tract irritation. The toxicological properties have not been fully investigated. WARNING! This product contains a chemical known in the State of California to
MDL Number	MFCD00146206
Health Hazard 2	CAUTION!
pH	2.00
Health Hazard 1	Signal Word: CAUTION!
DOT Information	DOT Class 8, : Corrosive
Melting Point	0°C

MilliporeSigma Supelco DL-Dithiothreitol Solution 1M in H2O, MilliporeSigma™ Supelco™

Pricing & Availability

Ricca Chemical Company Potassium Chloride Conductivity Standard, 10 μS/cm at 25°C, Ricca Chemical

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 IUPAC Name: potassium chloride SMILES: [Cl-].[K+]

Pricing & Availability
Specifications

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

Ricca Chemical Company Buffer, Reference Standard, pH 11.00 ± 0.01 at 25°C, Ricca Chemical

Pricing & Availability
Specifications

For Use With (Equipment)	pH Meter and Electrode
Physical Form	Liquid
pH	11
CAS Min %	0.11
Concentration	1X
For Use With (Application)	Calibration
Solution Type	pH Buffer
CAS Max %	0.11

Spectrum Chemical Manufacturing Corporation Dibasic Sodium Phosphate TS, (U.S.P. Test Solution), Spectrum™ Chemical

CAS: 7558-79-4 Molecular Formula: H17Na2O11P Molecular Weight (g/mol): 270.08 MDL Number: MFCD00149180 InChI Key: PYLIXCKOHOHGKQ-UHFFFAOYSA-N IUPAC Name: disodium phosphoric acid heptahydrate SMILES: O.O.O.O.O.O.O.[Na+].[Na+].OP(O)(O)=O

Pricing & Availability
Specifications

CAS	7558-79-4
Molecular Weight (g/mol)	270.08
MDL Number	MFCD00149180
SMILES	O.O.O.O.O.O.O.[Na+].[Na+].OP(O)(O)=O
IUPAC Name	disodium phosphoric acid heptahydrate
InChI Key	PYLIXCKOHOHGKQ-UHFFFAOYSA-N
Molecular Formula	H17Na2O11P

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Buffers and Standards

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Buffer Solution, pH 2.00 (Certified), Fisher Chemical™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Ricca Chemical Company Potassium Chloride Conductivity Standard, 10 μS/cm at 25°C, Ricca Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Ricca Chemical Company Buffer, Reference Standard, pH 11.00 ± 0.01 at 25°C, Ricca Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Spectrum Chemical Manufacturing Corporation Dibasic Sodium Phosphate TS, (U.S.P. Test Solution), Spectrum™ Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Buffer Solution, pH 2.00 (Certified), Fisher Chemical™

Ricca Chemical Company Potassium Chloride Conductivity Standard, 10 μS/cm at 25°C, Ricca Chemical

Ricca Chemical Company Buffer, Reference Standard, pH 11.00 ± 0.01 at 25°C, Ricca Chemical

Spectrum Chemical Manufacturing Corporation Dibasic Sodium Phosphate TS, (U.S.P. Test Solution), Spectrum™ Chemical