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 (22,850)

Spectroscopy Standards (5,986)

General Chemistry Solutions (5,253)

Matrix Blanks and Standardization Solutions (4,373)

Life Science Buffers (3,921)

Electrochemistry Buffers (2,320)

Environmental Testing Standards (1,933)

Electrochemistry Standards (1,219)

Karl Fischer Buffers and Reagents (481)

Isotope Standards (319)

Viscosity Standards (258)

Quality Control and Proficiency Samples (205)

Kjeldahl Buffers and Reagents (108)

Gel Filtration Standards (60)

Matrix Modifiers (29)

Osmolality Standards (12)

Smoke Point Reference (9)

Polarimetric Standards (4)

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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 Bottle (5)
1 Box (1)

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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 (44)
>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 (30)
Capsule (11)
Chemvelope (1)
Clear Liquid (1)
Clear Liquid at 20°C (2)
Crystalline (17)
Crystalline Powder (143)

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Technique

AA (472)
Acidimetry (3)
Calibrating the absorbance of spectrophotometers (1)
Calibration (7)
Calibration and Matrix Spikes (1)
Calibration and Verification (16)
Calibration and Verification of Kinematic and Dynamic Viscosity Test (15)

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Solution Type

Antigen Retrieval Reagent (1)
Aqueous (2)
Buffer (432)
Buffer, Storage (2)
Calibration (8)
Cleaning (1)
Colored pH Buffer (35)

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376 – 390 of 43,773 results

376

Ricca Chemical Company Fehling's Alkaline Solution (Fehling Solution B), Ricca Chemical

For Determination of Reducing Sugars

Pricing & Availability
Specifications

Name Note	Fehling Solution B
CAS	7732-18-5
Color	Colorless
Physical Form	Liquid
pH	>12
Chemical Name or Material	Fehling's Alkaline Solution
Grade	Laboratory

377

Ricca Chemical Company Nitrate Nitrogen Standard, 1000 ppm N (4427 ppm NO₃^-), 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

378

Ricca Chemical Company Hydrogen Sulfide Water, Saturated, Ricca Chemical

CAS: 7732-18-5

Pricing & Availability
Specifications

CAS	7732-18-5

379

Ricca Chemical Company Potassium Chloride Reference Solution D, 146.93 μS/cm at 25°C, 0.001 M, 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

380

Ricca Chemical Company 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

381

Ricca Chemical Company Nitrite Nitrogen Standard, 1000 ppm N (3285 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

382

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

383

Ricca Chemical Company Cobaltous Chloride CS, USP/EP Red Primary Solution, Ricca Chemical

CAS: 7791-13-1 Molecular Formula: Cl2CoH12O6 Molecular Weight (g/mol): 237.92 MDL Number: MFCD00149652 InChI Key: GFHNAMRJFCEERV-UHFFFAOYSA-L IUPAC Name: λ2-cobalt(2+) hexahydrate dichloride SMILES: O.O.O.O.O.O.[Cl-].[Cl-].[Co++]

Pricing & Availability
Specifications

CAS	7791-13-1
Molecular Weight (g/mol)	237.92
MDL Number	MFCD00149652
SMILES	O.O.O.O.O.O.[Cl-].[Cl-].[Co++]
IUPAC Name	λ2-cobalt(2+) hexahydrate dichloride
InChI Key	GFHNAMRJFCEERV-UHFFFAOYSA-L
Molecular Formula	Cl2CoH12O6

384

PBS, Phosphate Buffered Saline, 1X Solution, pH 7.4, Fisher BioReagents™

Pricing & Availability
Specifications

Packaging	Poly Cube
Physical Form	Liquid
pH	7.3 to 7.5
Recommended Storage	Room temperature
Melting Point	0°C

385

Fisher Scientific Fluoride Standard, 100 ppm F^-, Fisherbrand

CAS: 7681-49-4 Molecular Formula: FNa Molecular Weight (g/mol): 41.99 MDL Number: MFCD00003524 InChI Key: PUZPDOWCWNUUKD-UHFFFAOYSA-M PubChem CID: 5235 ChEBI: CHEBI:28741 IUPAC Name: sodium fluoride SMILES: [F-].[Na+]

Pricing & Availability
Specifications

PubChem CID	5235
CAS	7681-49-4
Molecular Weight (g/mol)	41.99
ChEBI	CHEBI:28741
MDL Number	MFCD00003524
SMILES	[F-].[Na+]
IUPAC Name	sodium fluoride
InChI Key	PUZPDOWCWNUUKD-UHFFFAOYSA-M
Molecular Formula	FNa

386

LabChem, Inc. Color Standard, Pt-Co, 500 Units APHA, Stock Solution, Certified, LabChem™

Pricing & Availability
Specifications

Linear Formula	K₂(PtCl₆)
Solubility	Soluble in water
Color	Orange
Physical Form	Liquid
UN Number	UN1789
Chemical Name or Material	Color Standard
Grade	Certified
Identification	Passes Test
Name Note	Pt-Co, 500 Units APHA, Stock Solution
CAS	7732-18-5
Health Hazard 3	GHS P Statement Obtain special instructions before use. Do not handle until all safety precautions have been read and understood. Do not breathe mist, vapors, spray. Contaminated work clothing must not be allowed out of the workplace. Wear protective gloves, eye protection, protective clothing, face protection. Wear respiratory protection. Wash exposed skin thoroughly after handling. If swallowed: Rinse mouth. Do not induce vomiting. Immediately call a poison center/doctor. If on skin (or hair): Remove immediately all contaminated clothing. Rinse skin with water/shower. Immediately call a poison center/doctor. Wash contaminated clothing before reuse. If inhaled: Remove person to fresh air and keep comfortable for breathing. Immediately call a poison center/doctor. 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/doctor. Store locked up. Dispose of contents/container to comply with local, state and federal regulations.
Health Hazard 2	GHS H Statement Causes severe skin burns and eye damage. May cause an allergic skin reaction. May cause allergy or asthma symptoms or breathing difficulties if inhaled. May cause cancer. May damage fertility or the unborn child.
Health Hazard 1	Danger
Packaging	Amber Glass
Recommended Storage	Room Temperature
Formula Weight	485.99
CAS Max %	0.1

387

LabChem, Inc. Titration (TAN) Solvent, Certified, LabChem™

Pricing & Availability

388

LabChem, Inc. Hydrogen Peroxide, Certified, >30% (w/w), LabChem™

CAS: 7722-84-1 Molecular Formula: H2O2 Molecular Weight (g/mol): 34.014 InChI Key: MHAJPDPJQMAIIY-UHFFFAOYSA-N Synonym: oxydol,perhydrol,superoxol,interox,hydrogen dioxide,inhibine,peroxaan,albone,hioxyl,kastone PubChem CID: 784 ChEBI: CHEBI:16240 IUPAC Name: hydrogen peroxide SMILES: OO

Pricing & Availability
Specifications

PubChem CID	784
CAS	7722-84-1
Molecular Weight (g/mol)	34.014
ChEBI	CHEBI:16240
SMILES	OO
Synonym	oxydol,perhydrol,superoxol,interox,hydrogen dioxide,inhibine,peroxaan,albone,hioxyl,kastone
IUPAC Name	hydrogen peroxide
InChI Key	MHAJPDPJQMAIIY-UHFFFAOYSA-N
Molecular Formula	H2O2

389

Micro Essential Lab Hydrion™ Buffer Chemvelopes

Powdered ingredients make precision buffers: ±0.02pH at 25°C

Pricing & Availability

390

Fisher Scientific Chloride Standard, 1000 ppm Cl^-, Fisherbrand

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

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Buffers and Standards

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Ricca Chemical Company Fehling's Alkaline Solution (Fehling Solution B), Ricca Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Ricca Chemical Company Nitrate Nitrogen Standard, 1000 ppm N (4427 ppm NO3-), Ricca Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Ricca Chemical Company Hydrogen Sulfide Water, Saturated, Ricca Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Ricca Chemical Company Potassium Chloride Reference Solution D, 146.93 μS/cm at 25°C, 0.001 M, Ricca Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Ricca Chemical Company Nitrite Nitrogen Standard, 1000 ppm N (3285 ppm NO2-), Ricca Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Conductivity Standard, 50 μS/cm at 25°C (23.6 ppm TDS as NaCl), Ricca Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

PBS, Phosphate Buffered Saline, 1X Solution, pH 7.4, Fisher BioReagents™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Fisher Scientific Fluoride Standard, 100 ppm F-, Fisherbrand Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

LabChem, Inc. Color Standard, Pt-Co, 500 Units APHA, Stock Solution, Certified, LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

LabChem, Inc. Hydrogen Peroxide, Certified, >30% (w/w), LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Fisher Scientific Chloride Standard, 1000 ppm Cl-, Fisherbrand Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Ricca Chemical Company Fehling's Alkaline Solution (Fehling Solution B), Ricca Chemical

Ricca Chemical Company Nitrate Nitrogen Standard, 1000 ppm N (4427 ppm NO₃^-), Ricca Chemical

Ricca Chemical Company Hydrogen Sulfide Water, Saturated, Ricca Chemical

Ricca Chemical Company Potassium Chloride Reference Solution D, 146.93 μS/cm at 25°C, 0.001 M, Ricca Chemical

Ricca Chemical Company Nitrite Nitrogen Standard, 1000 ppm N (3285 ppm NO₂^-), Ricca Chemical

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

PBS, Phosphate Buffered Saline, 1X Solution, pH 7.4, Fisher BioReagents™

Fisher Scientific Fluoride Standard, 100 ppm F^-, Fisherbrand

LabChem, Inc. Color Standard, Pt-Co, 500 Units APHA, Stock Solution, Certified, LabChem™

LabChem, Inc. Hydrogen Peroxide, Certified, >30% (w/w), LabChem™

Fisher Scientific Chloride Standard, 1000 ppm Cl^-, Fisherbrand