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 (22,754)

Spectroscopy Standards (5,983)

General Chemistry Solutions (5,246)

Matrix Blanks and Standardization Solutions (4,367)

Life Science Buffers (3,916)

Electrochemistry Buffers (2,316)

Environmental Testing Standards (1,935)

Electrochemistry Standards (1,221)

Karl Fischer Buffers and Reagents (478)

Isotope Standards (300)

Viscosity Standards (257)

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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Science Education (219)
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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 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 (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 (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 (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 (433)
Buffer, Storage (2)
Calibration (8)
Cleaning (1)
Colored pH Buffer (35)

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166 – 180 of 43,630 results

166

Thermo Scientific Chemicals HEPES, 1.0M buffer soln., pH 7.5

CAS: 7365-45-9 Molecular Formula: C8H18N2O4S Molecular Weight (g/mol): 238.30 MDL Number: MFCD00006158 InChI Key: JKMHFZQWWAIEOD-UHFFFAOYSA-N PubChem CID: 23831 ChEBI: CHEBI:42334 SMILES: OCCN1CCN(CCS(O)(=O)=O)CC1

Pricing & Availability
Specifications

PubChem CID	23831
CAS	7365-45-9
Molecular Weight (g/mol)	238.30
ChEBI	CHEBI:42334
MDL Number	MFCD00006158
SMILES	OCCN1CCN(CCS(O)(=O)=O)CC1
InChI Key	JKMHFZQWWAIEOD-UHFFFAOYSA-N
Molecular Formula	C8H18N2O4S

167

Thermo Scientific Chemicals TRIS-buffered saline (TBS, 10X) pH 7.4, for Western blot

CAS: 77-86-1 Molecular Formula: C4H11NO3 Molecular Weight (g/mol): 121.136 MDL Number: MFCD00004679 InChI Key: LENZDBCJOHFCAS-UHFFFAOYSA-N PubChem CID: 6503 ChEBI: CHEBI:9754 IUPAC Name: 2-amino-2-(hydroxymethyl)propane-1,3-diol SMILES: C(C(CO)(CO)N)O

Pricing & Availability
Specifications

PubChem CID	6503
CAS	77-86-1
Molecular Weight (g/mol)	121.136
ChEBI	CHEBI:9754
MDL Number	MFCD00004679
SMILES	C(C(CO)(CO)N)O
IUPAC Name	2-amino-2-(hydroxymethyl)propane-1,3-diol
InChI Key	LENZDBCJOHFCAS-UHFFFAOYSA-N
Molecular Formula	C4H11NO3

168

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

169

Ricca Chemical Company Conductivity Standard, 5 μS/cm at 25°C, Ricca Chemical

Pricing & Availability
Specifications

Boiling Point	100°C
Type	Conductivity Standard
CAS	7732-18-5
CAS Min %	98.0
Packaging	Natural Poly Bottle
Solution Type	Conductivity Standard
CAS Max %	100.0

170

LabChem, Inc. 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

171

Ricca Chemical Company Ammoniacal Buffer, pH 10.0, Ricca Chemical

Pricing & Availability

172

HYDRANAL™ - Composite 2, Reagent for volumetric one-component Karl Fischer titration (methanol free), Honeywell™ Fluka™

Pricing & Availability
Specifications

CAS	111-90-0

173

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

174

Fisher Scientific Buffer-Pac Color-Coded Solutions (Certified), Fisher Chemical

CAS: 50-00-0 Molecular Formula: CH2O Molecular Weight (g/mol): 30.03 MDL Number: MFCD00003274 InChI Key: WSFSSNUMVMOOMR-UHFFFAOYSA-N PubChem CID: 712 ChEBI: CHEBI:16842 IUPAC Name: formaldehyde SMILES: C=O

Pricing & Availability
Specifications

PubChem CID	712
CAS	50-00-0
Molecular Weight (g/mol)	30.03
ChEBI	CHEBI:16842
MDL Number	MFCD00003274
SMILES	C=O
IUPAC Name	formaldehyde
InChI Key	WSFSSNUMVMOOMR-UHFFFAOYSA-N
Molecular Formula	CH2O

175

Thermo Scientific Chemicals ADA, 99%, for biochemistry

CAS: 26239-55-4 Molecular Formula: C6H10N2O5 Molecular Weight (g/mol): 190.155 MDL Number: MFCD00008031 InChI Key: QZTKDVCDBIDYMD-UHFFFAOYSA-N Synonym: N-(2-Acetamido)iminodiacetic acid,N-(Carbamoylmethyl)iminodiacetic acid PubChem CID: 117765 ChEBI: CHEBI:43960 IUPAC Name: 2-[(2-amino-2-oxoethyl)-(carboxymethyl)amino]acetic acid SMILES: C(C(=O)N)N(CC(=O)O)CC(=O)O

Pricing & Availability
Specifications

PubChem CID	117765
CAS	26239-55-4
Molecular Weight (g/mol)	190.155
ChEBI	CHEBI:43960
MDL Number	MFCD00008031
SMILES	C(C(=O)N)N(CC(=O)O)CC(=O)O
Synonym	N-(2-Acetamido)iminodiacetic acid,N-(Carbamoylmethyl)iminodiacetic acid
IUPAC Name	2-[(2-amino-2-oxoethyl)-(carboxymethyl)amino]acetic acid
InChI Key	QZTKDVCDBIDYMD-UHFFFAOYSA-N
Molecular Formula	C6H10N2O5

176

Promotions Available

Gibco™ HEPES (1M)

Gibco HEPES (4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid) is a zwitterionic organic chemical buffering agent commonly used in cell culture media. It is membrane impermeable, relatively stable, and has limited interference in key processes.

Pricing & Availability
Specifications

Sterilization Method	Sterile-filtered
Physical Form	Liquid
Chemical Name or Material	Zwitterionic Organic Chemical Buffer
Grade	Biochemical
For Use With (Application)	Chromatin Biology
Sterility	Sterile
Solution Type	Buffer

177

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

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

178

Promotions Available

Thermo Scientific™ Pierce™ Yeast Digest Standard

The Thermo Scientific Pierce Yeast Digest Standard is a lyophilized yeast peptide mixture ideal for monitoring LC/MS system performance.

Pricing & Availability

179

Promotions Available

Gibco™ PBS, pH 7.2

Gibco PBS, pH 7.2, is a balanced salt solution widely used in various cell culture applications to maintain a stable pH and osmotic balance, making it ideal as a wash, transport, and dilution buffer.

Pricing & Availability
Specifications

Includes	No Sodium Pyruvate
Color	White
Physical Form	Liquid
pH	7.2
Manufacturing Quality	cGMP-compliant under the ISO 13485 standard
Chemical Name or Material	Phosphate Buffered Saline (PBS)
Concentration	1 X
For Use With (Application)	Mammalian Cell Culture
Osmolality	280 - 320 mOsm/kg
Sterility	Sterile-filtered
Solution Type	Phosphate Buffered Saline
Product Line	Gibco

180

Ricca Chemical Company Water Hardness Buffer, Odorless, Ricca Chemical

Pricing & Availability
Specifications

Name Note	Odorless
CAS	7791-18-6
Color	Colorless to Yellow
Packaging	Natural Poly Bottle
Physical Form	Liquid
CAS Min %	0.18
Chemical Name or Material	Water Hardness Buffer
Grade	Laboratory
Concentration	1X
For Use With (Application)	Water Analysis
Solution Type	Buffer
CAS Max %	0.19

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Buffers and Standards

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

Ricca Chemical Company Conductivity Standard, 5 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

LabChem, Inc. 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

Ricca Chemical Company Ammoniacal Buffer, pH 10.0, Ricca Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Fisher Scientific Buffer-Pac Color-Coded Solutions (Certified), Fisher Chemical GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Gibco™ HEPES (1M) Greener ChoiceOffers one or more environmental benefits itemized in the U.S. FTC “Green Guides.”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

Gibco™ PBS, pH 7.2 Greener ChoiceOffers one or more environmental benefits itemized in the U.S. FTC “Green Guides.”Learn More

Ricca Chemical Company Water Hardness Buffer, Odorless, Ricca Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

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

Ricca Chemical Company Conductivity Standard, 5 μS/cm at 25°C, Ricca Chemical

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

Ricca Chemical Company Ammoniacal Buffer, pH 10.0, Ricca Chemical

Fisher Scientific Buffer-Pac Color-Coded Solutions (Certified), Fisher Chemical

Gibco™ HEPES (1M)

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

Gibco™ PBS, pH 7.2

Ricca Chemical Company Water Hardness Buffer, Odorless, Ricca Chemical