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 (23,986)

Spectroscopy Standards (5,622)

General Chemistry Solutions (5,038)

Matrix Blanks and Standardization Solutions (4,259)

Life Science Buffers (4,141)

Electrochemistry Buffers (2,348)

Environmental Testing Standards (1,845)

Electrochemistry Standards (1,237)

Karl Fischer Buffers and Reagents (470)

Isotope Standards (377)

Viscosity Standards (253)

Quality Control and Proficiency Samples (180)

Kjeldahl Buffers and Reagents (90)

Gel Filtration Standards (57)

Matrix Modifiers (29)

Osmolality Standards (12)

Smoke Point Reference (9)

Polarimetric Standards (6)

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Available on GSA/VA Contract (381)
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Fast Shipping (441)
Greener Choice (95)
Production Products (191)
Science Education (209)
Small and Specialty Supplier (7,030)

Grade

AAS (66)
ACS (56)
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. (5)

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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 (98)

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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 (35)
Capsule (11)
Chemvelope (1)
Clear Liquid (1)
Clear Liquid at 20°C (2)
Colorless Liquid (1)
Crystalline (22)

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Technique

AA (467)
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 (3)
Buffer (469)
Buffer, Storage (4)
Calibration (8)
Cleaning, Storage, pH Buffer (15)
Colored pH Buffer (35)

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Search Within Results

106 – 120 of 44,339 results

106

Promotions Available

Karl Fischer Aqualine™ Solvent, for Karl Fischer Titration By Volumetry, Fisher Chemical™

Solvent for two-component system; Pyridine free

Pricing & Availability
Specifications

Name Note	Karl Fischer Reagent
CAS	288-32-4
MDL Number	81734
Color	Colorless
Packaging	Amber glass bottle
Physical Form	Liquid
Health Hazard 1	GHS Signal Word: Danger
UN Number	1992
DOT Information	DOT Class 3, : Flammable Liquid
Chemical Name or Material	Aqualine™ Solvent
Cleanup Symbol	Solvent
ChemAlert Storage Symbol	Red

107

Buffer, Reference Standard, pH 2.00 ± 0.01 at 25°C, Ricca Chemical

Pricing & Availability
Specifications

Boiling Point	100°C
CAS	7447-40-7
For Use With (Equipment)	pH Meter and Electrode
Color	Colorless
Physical Form	Liquid
pH	2
Concentration	1X
Shelf Life	24 months
For Use With (Application)	Calibration
Solution Type	pH Buffer
Melting Point	0°C

108

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

109

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

110

Thermo Scientific Chemicals Glycine, 0.2M buffer soln., pH 2.5

CAS: 56-40-6 Molecular Formula: C2H5NO2 Molecular Weight (g/mol): 75.07 MDL Number: MFCD00008131 InChI Key: DHMQDGOQFOQNFH-UHFFFAOYSA-N IUPAC Name: 2-aminoacetic acid SMILES: NCC(O)=O

Pricing & Availability
Specifications

CAS	56-40-6
Molecular Weight (g/mol)	75.07
MDL Number	MFCD00008131
SMILES	NCC(O)=O
IUPAC Name	2-aminoacetic acid
InChI Key	DHMQDGOQFOQNFH-UHFFFAOYSA-N
Molecular Formula	C2H5NO2

111

Potassium Chloride Conductivity Standard, 718 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

112

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

113

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

Pricing & Availability

114

Total Ionic Strength Adjustment Buffer (TISAB II), with CDTA, Ricca Chemical

For Fluoride Analysis using Ion Selective Electrodes

Pricing & Availability
Specifications

Name Note	With CDTA
CAS	13291-61-7
For Use With (Equipment)	Ion Selective Electrode
Physical Form	Liquid
pH	5.4
CAS Min %	0.33
Chemical Name or Material	Buffer Solution, Total Ionic Strength Adjustment Buffer (TISAB II)
Grade	Laboratory
Concentration	1X
For Use With (Application)	Fluoride Analysis
Solution Type	Buffer
CAS Max %	0.34

115

Gibco™ Sodium Chloride (NaCl) Solutions, 0.1–2.0 M

Gibco Sodium Chloride (NaCl) solutions are sterile-filtered, packaged in bioprocess containers, and ready-to-use. Sourcing NaCl solutions can help streamline your buffer preparation allowing you to focus on additional critical steps in your biopharmaceutical processes.

Pricing & Availability
Specifications

Sterilization Method	0.2 μm Sterile-filtered
Endotoxin Level	≤ 1.0 EU/mL
Color	Clear
Physical Form	Liquid
pH	4.5–8.0
Chemical Name or Material	Sodium Chloride
Certifications/Compliance	GMP - 21 CFR 820, ISO 13485
Shelf Life	12 Months
Sterility	Sterile-filtered

116

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

117

Sodium Citrate, 3.8% (w/v), Ricca Chemical

CAS: 6132-04-3 Molecular Formula: C6H9Na3O9 Molecular Weight (g/mol): 294.10 InChI Key: NLJMYIDDQXHKNR-UHFFFAOYSA-K Synonym: trisodium citrate dihydrate,sodium citrate dihydrate,sodium citrate tribasic dihydrate,natriumcitrat-dihydrat,sodium citrate hydrate,1,2,3-propanetricarboxylic acid, 2-hydroxy-, trisodium salt, dihydrate,citronensaeure-tri-na-salz-dihydrat,citric acid trisodium salt dihydrate,citric acid, trisodium salt dihydrate,trisodium 2-hydroxypropane-1,2,3-tricarboxylate dihydrate PubChem CID: 71474 ChEBI: CHEBI:32142 IUPAC Name: trisodium;2-hydroxypropane-1,2,3-tricarboxylate;dihydrate SMILES: C(C(=O)[O-])C(CC(=O)[O-])(C(=O)[O-])O.O.O.[Na+].[Na+].[Na+]

Pricing & Availability
Specifications

PubChem CID	71474
CAS	6132-04-3
Molecular Weight (g/mol)	294.10
ChEBI	CHEBI:32142
SMILES	C(C(=O)[O-])C(CC(=O)[O-])(C(=O)[O-])O.O.O.[Na+].[Na+].[Na+]
Synonym	trisodium citrate dihydrate,sodium citrate dihydrate,sodium citrate tribasic dihydrate,natriumcitrat-dihydrat,sodium citrate hydrate,1,2,3-propanetricarboxylic acid, 2-hydroxy-, trisodium salt, dihydrate,citronensaeure-tri-na-salz-dihydrat,citric acid trisodium salt dihydrate,citric acid, trisodium salt dihydrate,trisodium 2-hydroxypropane-1,2,3-tricarboxylate dihydrate
IUPAC Name	trisodium;2-hydroxypropane-1,2,3-tricarboxylate;dihydrate
InChI Key	NLJMYIDDQXHKNR-UHFFFAOYSA-K
Molecular Formula	C6H9Na3O9

118

Potassium Permanganate, For Chlorine, Certified, 0.891g/L ±0.005, LabChem™

CAS: 7722-64-7 Molecular Formula: KMnO4 Molecular Weight (g/mol): 158.032 InChI Key: VZJVWSHVAAUDKD-UHFFFAOYSA-N Synonym: potassium permanganate,chameleon mineral,condy's crystals,argucide,cairox,permanganate of potash,insta-perm,walko tablets,algae-k,solo san soo PubChem CID: 516875 IUPAC Name: potassium;permanganate SMILES: [O-][Mn](=O)(=O)=O.[K+]

Pricing & Availability
Specifications

PubChem CID	516875
CAS	7722-64-7
Molecular Weight (g/mol)	158.032
SMILES	[O-][Mn](=O)(=O)=O.[K+]
Synonym	potassium permanganate,chameleon mineral,condy's crystals,argucide,cairox,permanganate of potash,insta-perm,walko tablets,algae-k,solo san soo
IUPAC Name	potassium;permanganate
InChI Key	VZJVWSHVAAUDKD-UHFFFAOYSA-N
Molecular Formula	KMnO4

119

R&D Systems™ ELISA Plate-coating Buffer

ELISA Plate-coating Buffer from the most referenced ELISA manufacturer. Highly validated for accurate quantitation and long-term reproducibility.

Pricing & Availability

120

Gibco™ DPBS, no calcium, no magnesium

Dulbecco's Phosphate-Buffered Saline (DPBS) is a balanced salt solution used for a variety of cell culture applications, such as washing cells before dissociation, transporting cells or tissue, diluting cells for counting, and preparing reagents.

Pricing & Availability
Specifications

Physical Form	Liquid
pH	7.0 to 7.3
Manufacturing Quality	cGMP-compliant under the ISO 13485 standard
Chemical Name or Material	DPBS
For Use With (Application)	Mammalian Cell Culture
Osmolality	270 to 300 mOsm/kg
Sterility	Sterile
Solution Type	Cleaning, Storage, pH Buffer

Buffers and Standards

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Buffer, Reference Standard, pH 2.00 ± 0.01 at 25°C, Ricca Chemical SureTRACESupports traceability with guaranteed access to certificates and proactive change notifications.Learn More

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

Gibco™ Sodium Chloride (NaCl) Solutions, 0.1–2.0 M Greener ChoiceOffers one or more environmental benefits itemized in the U.S. FTC “Green Guides.”Learn More

Gibco™ DPBS, no calcium, no magnesium GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More Greener ChoiceOffers one or more environmental benefits itemized in the U.S. FTC “Green Guides.”Learn More

Buffer, Reference Standard, pH 2.00 ± 0.01 at 25°C, Ricca Chemical

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

Gibco™ Sodium Chloride (NaCl) Solutions, 0.1–2.0 M

Gibco™ DPBS, no calcium, no magnesium