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 (24,051)

Spectroscopy Standards (5,659)

General Chemistry Solutions (5,035)

Matrix Blanks and Standardization Solutions (4,282)

Life Science Buffers (4,126)

Electrochemistry Buffers (2,328)

Environmental Testing Standards (1,865)

Electrochemistry Standards (1,229)

Karl Fischer Buffers and Reagents (467)

Isotope Standards (376)

Viscosity Standards (251)

Quality Control and Proficiency Samples (206)

Kjeldahl Buffers and Reagents (90)

Gel Filtration Standards (57)

Matrix Modifiers (29)

Osmolality Standards (12)

Smoke Point Reference (10)

Polarimetric Standards (6)

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Available on GSA/VA Contract (382)
SureTRACE (78)
Fast Shipping (453)
Greener Choice (96)
Production Products (191)
Science Education (205)
Small and Specialty Supplier (7,020)

Grade

AAS (66)
ACS (194)
ACS Reagent (25)
ACS/ASTM E 200/AOAC/EPA (7)
ACS/ASTM E 200/AOAC/USP Volumetric (5)
APHA/EPA (5)
APHA/Hazen (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 mol (1)
0.5 L (1)
0.5 mL (15)
0.5 mol (1)
1 Bottle (5)
1 Box (1)
1 Ea. (4)

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Percent Purity

≥ 4400 Units/mg (Nystatin) ≥ 5000 Units/mg (Nystatin) (1) (8)
≥ 85.0 % (1)
≥14% (BF3) (1)
≥30% (RT) (1)
≥30% (titration) (1)
≥35% (RT) (1)
≥40% (3)

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pH

≥12 to ≤14 (6)
>11.5 (1)
>12 (44)
>13 (97)
>8 (1)
<0.5 (3)
<1 (97)

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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 (37)
Capsule (11)
Chemvelope (1)
Clear Liquid (1)
Clear Liquid at 20°C (2)
Colorless Liquid (1)
Crystalline (22)

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Solution Type

Antigen Retrieval Reagent (1)
Aqueous (3)
Buffer (587)
Buffer, Storage (4)
Calibration (8)
Cleaning, Storage, pH Buffer (15)
Colored pH Buffer (43)

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For Use With (Application)

Accurate calibrations and NIST traceability (1)
Accurate calibrations and NIST traceability, laboratory and bench analysis (2)
Accurate calibrations and NIST traceability, portable and field analysis (1)
Accurate pH calibrations and NIST traceability, laboratory and bench analysis (8)
Accurate pH calibrations and NIST traceability, portable and field analysis (6)
Accurate, reproducible pH calibrations (15)
Agarose Gel Electrophoresis, Polyacrylamide Gel Electrophoresis (10)

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Search Within Results

166 – 180 of 44,446 results

166

Nitrate Standard, 1000 ppm NO₃^- (226 ppm N), Ricca Chemical

CAS: 7757-79-1 Molecular Formula: KNO3 Molecular Weight (g/mol): 101.10 MDL Number: MFCD00011409 InChI Key: FGIUAXJPYTZDNR-UHFFFAOYSA-N PubChem CID: 24434 ChEBI: CHEBI:63043 IUPAC Name: potassium nitrate SMILES: [K+].[O-][N+]([O-])=O

Pricing & Availability
Specifications

PubChem CID	24434
CAS	7757-79-1
Molecular Weight (g/mol)	101.10
ChEBI	CHEBI:63043
MDL Number	MFCD00011409
SMILES	[K+].[O-][N+]([O-])=O
IUPAC Name	potassium nitrate
InChI Key	FGIUAXJPYTZDNR-UHFFFAOYSA-N
Molecular Formula	KNO3

167

Potassium Chloride Conductivity Standard, 84 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

168

Conductivity Standard, 50 μS/cm at 25°C (23.6 ppm TDS as NaCl), Ricca Chemical

CAS: 7647-14-5 Molecular Formula: ClNa Molecular Weight (g/mol): 58.44 MDL Number: MFCD00003477 InChI Key: FAPWRFPIFSIZLT-UHFFFAOYSA-M PubChem CID: 5234 ChEBI: CHEBI:26710 IUPAC Name: sodium chloride SMILES: [Na+].[Cl-]

Pricing & Availability
Specifications

PubChem CID	5234
CAS	7647-14-5
Molecular Weight (g/mol)	58.44
ChEBI	CHEBI:26710
MDL Number	MFCD00003477
SMILES	[Na+].[Cl-]
IUPAC Name	sodium chloride
InChI Key	FAPWRFPIFSIZLT-UHFFFAOYSA-M
Molecular Formula	ClNa

169

Conductivity Standard, 500 μS/cm at 25°C (240 ppm TDS as NaCl), Ricca Chemical

Pricing & Availability
Specifications

Boiling Point	100°C
Solubility	Completely miscible
Color	Colorless
Physical Form	Liquid
Chemical Name or Material	Conductivity/TDS Standard
Type	Conductivity Standard
Name Note	500μS/cm (500μmho/cm) at 25°C
Concentration or Composition (by Analyte or Components)	240ppm as NaCl
CAS	7732-18-5
pH	6.7 to 7.3
Packaging	Natural Poly Bottle
Odor	Odorless
Solution Type	Conductivity Standard
Melting Point	0°C

170

Conductivity Standard, 5000 μS/cm at 25°C (2620 ppm TDS as NaCl), Ricca Chemical

Pricing & Availability
Specifications

Boiling Point	100°C
Type	Conductivity Standard
Concentration or Composition Notes	2620ppm as NaCl
Name Note	5 mS/cm (5000 μmho/cm) at 25°C
CAS	7732-18-5
Color	Colorless
Physical Form	Liquid
CAS Min %	0.26
Chemical Name or Material	Conductivity/TDS Standard
Solution Type	Conductivity Standard
CAS Max %	0.27

171

Conductivity Standard, 200 μS/cm at 25°C (95 ppm TDS as NaCl), Ricca Chemical

Pricing & Availability
Specifications

Boiling Point	100°C
Type	Conductivity Standard
Packaging	Natural Poly Bottle

172

Hexavalent Chromium Standard, 100 ppm Cr⁶⁺, Ricca Chemical

CAS: 7732-18-5

Pricing & Availability
Specifications

CAS	7732-18-5

173

Sulfate Standard Stock Solution, 1000 ppm SO₄²^-, Ricca Chemical

CAS: 7778-80-5 Molecular Formula: K2O4S Molecular Weight (g/mol): 174.25 MDL Number: MFCD00011388 InChI Key: OTYBMLCTZGSZBG-UHFFFAOYSA-L PubChem CID: 24507 ChEBI: CHEBI:32036 IUPAC Name: dipotassium sulfate SMILES: [K+].[K+].[O-]S([O-])(=O)=O

Pricing & Availability
Specifications

PubChem CID	24507
CAS	7778-80-5
Molecular Weight (g/mol)	174.25
ChEBI	CHEBI:32036
MDL Number	MFCD00011388
SMILES	[K+].[K+].[O-]S([O-])(=O)=O
IUPAC Name	dipotassium sulfate
InChI Key	OTYBMLCTZGSZBG-UHFFFAOYSA-L
Molecular Formula	K2O4S

174

Buffer, Reference Standard, pH 1.68 ± 0.01 at 25°C, Ricca Chemical

Pricing & Availability
Specifications

Boiling Point	100°C
For Use With (Equipment)	pH Meter and Electrode
Color	Colorless
Physical Form	Liquid
pH	1.68
Concentration	1X
Shelf Life	24 months
For Use With (Application)	Calibration
Solution Type	pH Buffer
Melting Point	0°C

175

Potassium Chloride Conductivity Standard, 50 μS/cm at 25°C, Ricca Chemical

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

176

Nitrite Nitrogen Standard, 100 ppm N (328.5 ppm NO₂^-), Ricca Chemical

CAS: 7758-09-0 Molecular Formula: KNO2 Molecular Weight (g/mol): 85.10 MDL Number: MFCD00011408 InChI Key: BXNHTSHTPBPRFX-UHFFFAOYSA-M PubChem CID: 516910 IUPAC Name: potassium nitrite SMILES: [K+].[O-]N=O

Pricing & Availability
Specifications

PubChem CID	516910
CAS	7758-09-0
Molecular Weight (g/mol)	85.10
MDL Number	MFCD00011408
SMILES	[K+].[O-]N=O
IUPAC Name	potassium nitrite
InChI Key	BXNHTSHTPBPRFX-UHFFFAOYSA-M
Molecular Formula	KNO2

177

Buffer, Reference Standard, pH 9.00 ± 0.01 at 25°C, Ricca Chemical

Pricing & Availability
Specifications

CAS	7447-40-7
For Use With (Equipment)	pH Meter and Electrode
Color	Colorless
Physical Form	Liquid
pH	9
Concentration	1X
For Use With (Application)	Calibration
Solution Type	pH Buffer

178

Conductivity Standard, 150,000 μS/cm (150 mS/cm) at 25°C, Ricca Chemical

Pricing & Availability

179

Chloride Standard, 1000 ppm Cl^- (0.0282 N), Ricca Chemical

Pricing & Availability
Specifications

PubChem CID	5234
CAS	7647-14-5
Molecular Weight (g/mol)	58.44
ChEBI	CHEBI:26710
MDL Number	MFCD00003477
SMILES	[Na+].[Cl-]
IUPAC Name	sodium chloride
InChI Key	FAPWRFPIFSIZLT-UHFFFAOYSA-M
Molecular Formula	ClNa

180

Buffer, Reference Standard, pH 5.00 ± 0.01 at 25°C, Ricca Chemical

Pricing & Availability
Specifications

CAS	877-24-7
For Use With (Equipment)	pH Meter and Electrode
Color	Colorless
Physical Form	Liquid
pH	5
Concentration	1X
For Use With (Application)	Calibration
Solution Type	pH Buffer

Buffers and Standards

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Buffer, Reference Standard, pH 1.68 ± 0.01 at 25°C, Ricca Chemical SureTRACESupports traceability with guaranteed access to certificates and proactive change notifications.Learn More

Potassium Chloride Conductivity Standard, 50 μS/cm at 25°C, Ricca Chemical GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer, Reference Standard, pH 9.00 ± 0.01 at 25°C, Ricca Chemical SureTRACESupports traceability with guaranteed access to certificates and proactive change notifications.Learn More

Buffer, Reference Standard, pH 5.00 ± 0.01 at 25°C, Ricca Chemical SureTRACESupports traceability with guaranteed access to certificates and proactive change notifications.Learn More

Buffer, Reference Standard, pH 1.68 ± 0.01 at 25°C, Ricca Chemical

Potassium Chloride Conductivity Standard, 50 μS/cm at 25°C, Ricca Chemical

Buffer, Reference Standard, pH 9.00 ± 0.01 at 25°C, Ricca Chemical

Buffer, Reference Standard, pH 5.00 ± 0.01 at 25°C, Ricca Chemical