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)

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General Chemistry Solutions (5,253)

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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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436 – 450 of 43,773 results

436

Thermo Scientific Chemicals Sodium phosphate, 0.5M buffer soln., pH 8.0

Pricing & Availability
Specifications

MDL Number	MFCD00146206
Solubility Information	Soluble in water (121mg/ml at 20°C).
Physical Form	Liquid
pH	8.0
Chemical Name or Material	Sodium phosphate buffer soln.
TSCA	Yes
Recommended Storage	Ambient temperatures
Concentration	0.5 M

437

Thermo Scientific Chemicals MES, 0.5M buffer soln., pH 5.0

CAS: 145224-94-8 Molecular Formula: C6H15NO5S Molecular Weight (g/mol): 213.248 MDL Number: MFCD00283848 InChI Key: MIIIXQJBDGSIKL-UHFFFAOYSA-N PubChem CID: 16218417 IUPAC Name: 2-morpholin-4-ylethanesulfonic acid;hydrate SMILES: C1COCCN1CCS(=O)(=O)O.O

Pricing & Availability
Specifications

PubChem CID	16218417
CAS	145224-94-8
Molecular Weight (g/mol)	213.248
MDL Number	MFCD00283848
SMILES	C1COCCN1CCS(=O)(=O)O.O
IUPAC Name	2-morpholin-4-ylethanesulfonic acid;hydrate
InChI Key	MIIIXQJBDGSIKL-UHFFFAOYSA-N
Molecular Formula	C6H15NO5S

438

FisherTab™ ST-35 Kjeldahl Tablets, Fisher Chemical

Composition per tablet: 3.5g K₂SO₄ + 0.35g Se

Pricing & Availability

439

Buffer solution pH 4, Phthalate buffer, traceable to NIST, ready to use

CAS: 877-24-7 | C₈H₅KO₄

Pricing & Availability
Specifications

CAS	7487-94-7
MDL Number	MFCD00217672
Solubility Information	Solubility in water: miscible.
Physical Form	Liquid
Chemical Name or Material	Buffer solution pH 4
Concentration	1.0% (Potassium hydrogen phthalate)
Molecular Formula	C₈H₅KO₄
Formula Weight	204.22

440

pH 4 Buffer Standard, SPEX CertiPrep™

ISO/IEC Guide 34 Certified, NIST-Traceable Certified Reference Material

Pricing & Availability
Specifications

Chemical Name or Material	pH 4 Buffer Standard

441

Ricca Chemical Company Glucose-Glutamic Acid Solution, Standard Check Solution for Biochemical Oxygen Demand (BOD), Ricca Chemical

CAS: 50-99-7 Molecular Formula: C6H12O6 Molecular Weight (g/mol): 180.156 InChI Key: GZCGUPFRVQAUEE-SLPGGIOYSA-N PubChem CID: 107526 ChEBI: CHEBI:42758 IUPAC Name: (2R,3S,4R,5R)-2,3,4,5,6-pentahydroxyhexanal SMILES: C(C(C(C(C(C=O)O)O)O)O)O

Pricing & Availability
Specifications

PubChem CID	107526
CAS	50-99-7
Molecular Weight (g/mol)	180.156
ChEBI	CHEBI:42758
SMILES	C(C(C(C(C(C=O)O)O)O)O)O
IUPAC Name	(2R,3S,4R,5R)-2,3,4,5,6-pentahydroxyhexanal
InChI Key	GZCGUPFRVQAUEE-SLPGGIOYSA-N
Molecular Formula	C6H12O6

442

Thermo Scientific Chemicals TBE running buffer (10X)

Commonly used in nucleic acid electrophoresis. TBE Buffer is used for polyacrylamide and agarose gel electrophoresis. It is ideally suited for DNA and RNA separation on longer run, higher voltage or amperage gels. TBE is used with non-denaturing or denaturing (7 M urea) gels.

Pricing & Availability
Specifications

Health Hazard 3	P201-P202-P264b-P280i-P281-P302+P352-P305+P351+P338-P308+P313-P332+P313-P362-P501c
Solubility Information	It is soluble in water.
Packaging	Plastic bottle
Physical Form	Liquid
Health Hazard 1	H315-H319-H360FD
Chemical Name or Material	TBE running buffer (10X)
TSCA	Yes
Recommended Storage	Ambient temperatures

443

Buffer solution pH 4.01 (+/-0.022 @ 25oC) No Color Specpure NIST Traceable

CAS: 1336-21-6 | H5NO | 35.05 g/mol

Pricing & Availability
Specifications

Molecular Weight (g/mol)	35.05
ChEBI	CHEBI:18219
Color	Colorless
Physical Form	Liquid
Chemical Name or Material	Buffer solution
SMILES	N.O
InChI Key	VHUUQVKOLVNVRT-UHFFFAOYSA-N
Vapor Pressure	23 hPa (17mm Hg) at 20°C
PubChem CID	14923
MDL Number	MFCD00066650
Solubility Information	Miscible with water.
TSCA	Yes
Recommended Storage	Ambient temperatures
IUPAC Name	azanium;hydroxide
Molecular Formula	H5NO
Odor	Odorless

444

Potassium iodate, 0.1N Standardized Solution

Molecular Formula: IKO3 Molecular Weight (g/mol): 214.00 MDL Number: MFCD00011406 InChI Key: JLKDVMWYMMLWTI-UHFFFAOYSA-M Synonym: potassium iodate,potassium triodate,caswell no. 693a,iodic acid, potassium salt,unii-i139e44nhl,potassium iodine oxide kio3,iodic acid hio3 , potassium salt,epa pesticide chemical code 075703,iodic acid hio3 , potassium salt 1:1,kaliumjodat PubChem CID: 23665710 IUPAC Name: potassium;iodate SMILES: [O-]I(=O)=O.[K+]

Pricing & Availability
Specifications

PubChem CID	23665710
Molecular Weight (g/mol)	214.00
MDL Number	MFCD00011406
SMILES	[O-]I(=O)=O.[K+]
Synonym	potassium iodate,potassium triodate,caswell no. 693a,iodic acid, potassium salt,unii-i139e44nhl,potassium iodine oxide kio3,iodic acid hio3 , potassium salt,epa pesticide chemical code 075703,iodic acid hio3 , potassium salt 1:1,kaliumjodat
IUPAC Name	potassium;iodate
InChI Key	JLKDVMWYMMLWTI-UHFFFAOYSA-M
Molecular Formula	IKO3

445

Buffer solution, pH 2.00 (+/-0.026 @ 25oC), No Color, Specpure, NIST Traceable

For Calibration of pH Meters | CAS: 7447-40-7

Pricing & Availability
Specifications

Color	Colorless
Traceability to NIST	Yes
Physical Form	Liquid
Chemical Name or Material	Buffer solution
Vapor Pressure	23 hPa (17mm Hg) at 20°C
Concentration or Composition (by Analyte or Components)	Potassium chloride: 0.7%; Hydrochloric acid: 0.7%; water: 98.6%
CAS	7732-18-5
Health Hazard 3	P234-P390
MDL Number	MFCD00146252
Health Hazard 2	In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. Wear suitable gloves and eye/face protection. This material and/or its container must be disposed of as hazardous waste.
Solubility Information	Soluble in water.
Health Hazard 1	H290
TSCA	Yes
Recommended Storage	Ambient temperatures

446

Buffer solution pH 7.00 (+/-0.024 @ 25oC) No Color Specpure NIST Traceable

CAS: 1336-21-6 | H5NO | 35.05 g/mol

Pricing & Availability
Specifications

Molecular Weight (g/mol)	35.05
ChEBI	CHEBI:18219
Color	Colorless
Traceability to NIST	Yes
Physical Form	Liquid
Chemical Name or Material	Buffer solution
Grade	Specpure
SMILES	N.O
InChI Key	VHUUQVKOLVNVRT-UHFFFAOYSA-N
PubChem CID	14923
CAS	1336-21-6
MDL Number	MFCD00066650
Solubility Information	pH 7.00 buffers are in solution form. Miscible with water.
TSCA	Yes
Recommended Storage	Ambient temperatures
Molecular Formula	H5NO
Odor	Odorless

447

Phosphate (as Phosphorus) Standard, (1mL = 1mg P), Certified, 1000ppm ±10ppm, LabChem™

CAS: 7778-77-0 Molecular Formula: H2KO4P Molecular Weight (g/mol): 136.08 MDL Number: MFCD00011401 MFCD00147253 InChI Key: GNSKLFRGEWLPPA-UHFFFAOYSA-M PubChem CID: 516951 ChEBI: CHEBI:63036 IUPAC Name: potassium dihydrogen phosphate SMILES: [K+].OP(O)([O-])=O

Pricing & Availability
Specifications

PubChem CID	516951
CAS	7778-77-0
Molecular Weight (g/mol)	136.08
ChEBI	CHEBI:63036
MDL Number	MFCD00011401 MFCD00147253
SMILES	[K+].OP(O)([O-])=O
IUPAC Name	potassium dihydrogen phosphate
InChI Key	GNSKLFRGEWLPPA-UHFFFAOYSA-M
Molecular Formula	H2KO4P

448

Ricca Chemical Company Potassium Chloride Conductivity Standard, 5 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

449

Fisher Scientific Chloride ISA, Sodium Nitrate, 5.0 M, Fisherbrand

Pricing & Availability

450

Tetrabutylammonium hydroxide, 1M solution in methanol

CAS: 2052-49-5 | C16H37NO | 259.48 g/mol

Pricing & Availability
Specifications

Linear Formula	[CH₃(CH₂)₃]₄NOH
Molecular Weight (g/mol)	259.48
InChI Key	VDZOOKBUILJEDG-UHFFFAOYSA-M
Density	0.9100g/mL
PubChem CID	2723671
Name Note	1M Solutionin Methanol
RTECS Number	BS5425000
Formula Weight	259.46
Melting Point	-98.0°C
Boiling Point	65.0°C
Chemical Name or Material	Tetrabutylammonium hydroxide
SMILES	[OH-].CCCC[N+](CCCC)(CCCC)CCCC
CAS	67-56-1
Health Hazard 3	GHS P Statement: Wear protective gloves/protective clothing/eye protection/face protection. IF SWALLOWED: rinse mouth. Do NOT induce vomiting. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing. Keep away from heat/sparks/open flames/hot surfaces. - No smoking. Ground/Bond container and receiving equipment. WARNING: The information provided on this web site was developed in compliance with European Union (EU) regulations and is correct to the best of our knowledge, information and belief at the date of its publication. The information given is designed only as a guide for safe handling and use. It is not to be considered as either a warranty or quality specification.
MDL Number	MFCD00009425
Health Hazard 2	GHS H Statement: Toxic if swallowed. Toxic in contact with skin. Toxic if inhaled. Causes severe skin burns and eye damage. Causes damage to organs. Highly flammable liquid and vapor.
Flash Point	12°C
Packaging	Plastic bottle
Solubility Information	Solubility in water: soluble.
Health Hazard 1	Danger
Refractive Index	1.3775
Synonym	tetrabutylammonium hydroxide,tetra-n-butylammonium hydroxide,tetrabutylazanium hydroxide,tetrabutylammoniumhydroxide,1-butanaminium, n,n,n-tributyl-, hydroxide,ammonium, tetrabutyl-, hydroxide,n,n,n-tributyl-1-butanaminium hydroxide,tetra n-butyl ammonium hydroxide,tetra-n-butyl ammonium hydroxide,1-butanaminium, n,n,n-tributyl-, hydroxide 1:1
TSCA	TSCA
Molecular Formula	C16H37NO
EINECS Number	218-147-6
Specific Gravity	0.91

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Buffers and Standards

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pH 4 Buffer Standard, SPEX CertiPrep™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Ricca Chemical Company Glucose-Glutamic Acid Solution, Standard Check Solution for Biochemical Oxygen Demand (BOD), Ricca Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Phosphate (as Phosphorus) Standard, (1mL = 1mg P), Certified, 1000ppm ±10ppm, LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Ricca Chemical Company Potassium Chloride 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

Fisher Scientific Chloride ISA, Sodium Nitrate, 5.0 M, Fisherbrand Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

pH 4 Buffer Standard, SPEX CertiPrep™

Ricca Chemical Company Glucose-Glutamic Acid Solution, Standard Check Solution for Biochemical Oxygen Demand (BOD), Ricca Chemical

Phosphate (as Phosphorus) Standard, (1mL = 1mg P), Certified, 1000ppm ±10ppm, LabChem™

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

Fisher Scientific Chloride ISA, Sodium Nitrate, 5.0 M, Fisherbrand