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)
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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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91 – 105 of 44,446 results

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TAN Standard (Certified), Fisher Chemical

CAS: 79-09-4 Molecular Formula: C3H6O2 Molecular Weight (g/mol): 74.079 MDL Number: MFCD00212734 InChI Key: XBDQKXXYIPTUBI-UHFFFAOYSA-N PubChem CID: 1032 ChEBI: CHEBI:30768 IUPAC Name: propanoic acid SMILES: CCC(=O)O

Pricing & Availability
Specifications

PubChem CID	1032
CAS	79-09-4
Molecular Weight (g/mol)	74.079
ChEBI	CHEBI:30768
MDL Number	MFCD00212734
SMILES	CCC(=O)O
IUPAC Name	propanoic acid
InChI Key	XBDQKXXYIPTUBI-UHFFFAOYSA-N
Molecular Formula	C3H6O2

EP Color Standard BY/Reference Solution BY₁, Brownish-Yellow Standard Solution, Ricca Chemical

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Potassium Chloride Conductivity Standard, 718 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

Ammonia (as Nitrogen) Standard, Certified, 1000ppm ±10ppm (1mL = 1mg N, 1mL = 1.22mg NH₃), LabChem™

CAS: 12125-02-9 Molecular Formula: ClH4N Molecular Weight (g/mol): 53.49 MDL Number: MFCD00011420 InChI Key: NLXLAEXVIDQMFP-UHFFFAOYSA-N PubChem CID: 25517 ChEBI: CHEBI:31206 IUPAC Name: amine hydrochloride SMILES: N.Cl

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Specifications

PubChem CID	25517
CAS	12125-02-9
Molecular Weight (g/mol)	53.49
ChEBI	CHEBI:31206
MDL Number	MFCD00011420
SMILES	N.Cl
IUPAC Name	amine hydrochloride
InChI Key	NLXLAEXVIDQMFP-UHFFFAOYSA-N
Molecular Formula	ClH4N

Ricca Chemical Company Potassium Permanganate Standard, 89.1 mg/L, equivalent to 100 ppm Cl₂, Ricca Chemical

For APHA Testing

Pricing & Availability
Specifications

Packaging	Amber Glass Bottle
Grade	Laboratory

EP Reference Solution BY₅, Brownish-Yellow Reference Solution, Ricca Chemical

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Buffer, Reference Standard, pH 12.45 ± 0.01 at 25°C, Ricca Chemical

Pricing & Availability
Specifications

CAS	7732-18-5
For Use With (Equipment)	pH Meter and Electrode
Physical Form	Liquid
pH	12.45
Concentration	1X
Shelf Life	18 months
For Use With (Application)	Calibration
Solution Type	pH Buffer
CAS Max %	0.37

Buffer Solution pH 4.0 at 25°C, Color Coded Red, Certified, LabChem™

Pricing & Availability
Specifications

Linear Formula	KHC₈H₄O₄
Color	Red
Traceability to NIST	Traceable to NIST
Physical Form	Liquid
Chemical Name or Material	Buffer Solution pH 4.0 at 25°C
Grade	Certified
Identification	Passes Test
Density	1g/mL
Name Note	Color Coded Red
CAS	67-56-1
Health Hazard 3	GHS P Statement If in contact with skin or eyes, rinse thoroughly with water for 15-20 minutes. If swallowed, get medical attention.
Decomposition Information	Formaldehyde; Carbon monoxide; Carbon dioxide
Health Hazard 2	GHS H Statement Solution is not hazardous.
Solubility Information	Soluble in water
pH	4.00 to 4.01
Recommended Storage	Room Temperature
Formula Weight	204.23
Specific Gravity	1g/mL
CAS Max %	0.005

Buffer, Reference Standard, pH 7.00 ± 0.01 at 25°C, Ricca Chemical

Pricing & Availability
Specifications

Name Note	pH 7.00 ± 0.01 at 25 deg C
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	pH Buffer
CAS Max %	0.5

100

Buffer, Reference Standard, pH 10.00 ± 0.01 at 25°C, Ricca Chemical

Pricing & Availability
Specifications

CAS	7732-18-5
For Use With (Equipment)	pH Meter and Electrode
Physical Form	Liquid
pH	10
CAS Min %	0.03
Chemical Name or Material	Buffer, Reference Standard
Concentration	1X
For Use With (Application)	Calibration
Solution Type	pH Buffer
CAS Max %	0.03

101

Buffer Solution pH 7.0 at 25°C, Color Coded Yellow, Certified, LabChem™

Pricing & Availability
Specifications

Linear Formula	KH₂PO₄
Color	Yellow
Traceability to NIST	Traceable to NIST
Physical Form	Liquid
Chemical Name or Material	Buffer Solution pH 7.0 at 25°C
Grade	Certified
Identification	Passes Test
Name Note	Color Coded Yellow
CAS	1310-73-2
Health Hazard 3	GHS P Statement If in contact with skin or eyes, rinse thoroughly with water for 15-20 minutes. If swallowed, get medical attention.
Decomposition Information	Phosphorus oxides; Sodium oxide
Health Hazard 2	GHS H Statement Solution is not hazardous.
Solubility Information	Soluble in water
pH	7.00 ±0.01
Recommended Storage	Room Temperature
Formula Weight	136.09
CAS Max %	0.08

102

Ricca Chemical Company Potassium Pyroantimonate Solution R, Ricca Chemical

CAS: 12208-13-8

Pricing & Availability
Specifications

CAS	12208-13-8

103

Nitrate (as Nitrogen) Standard, Certified, 1000ppm ±10ppm (1mL = 1mg N, 1mL = 4.43mg NO₃^-), LabChem™

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

104

Potassium Chloride Conductivity Standard, 100,000 μS/cm (100 mS/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

105

Ammonia TS 2, Ricca Chemical

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: amine hydrate SMILES: N.O

Pricing & Availability
Specifications

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

Buffers and Standards

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Ammonia (as Nitrogen) Standard, Certified, 1000ppm ±10ppm (1mL = 1mg N, 1mL = 1.22mg NH3), LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer Solution pH 4.0 at 25°C, Color Coded Red, Certified, LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer, Reference Standard, pH 10.00 ± 0.01 at 25°C, Ricca Chemical SureTRACESupports traceability with guaranteed access to certificates and proactive change notifications.Learn More

Buffer Solution pH 7.0 at 25°C, Color Coded Yellow, Certified, LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Nitrate (as Nitrogen) Standard, Certified, 1000ppm ±10ppm (1mL = 1mg N, 1mL = 4.43mg NO3-), LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Ammonia (as Nitrogen) Standard, Certified, 1000ppm ±10ppm (1mL = 1mg N, 1mL = 1.22mg NH₃), LabChem™

Buffer Solution pH 4.0 at 25°C, Color Coded Red, Certified, LabChem™

Buffer, Reference Standard, pH 10.00 ± 0.01 at 25°C, Ricca Chemical

Buffer Solution pH 7.0 at 25°C, Color Coded Yellow, Certified, LabChem™

Nitrate (as Nitrogen) Standard, Certified, 1000ppm ±10ppm (1mL = 1mg N, 1mL = 4.43mg NO₃^-), LabChem™