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 (22,722)

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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)
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100.15 (1)

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Percent Purity

≥14% (BF3) (1)
≥30% (RT) (1)
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≥40% (3)
≥49% (2)
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≥12 to ≤14 (6)
>11.5 (2)
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Solvent or Matrix

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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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Colored pH Buffer (35)

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661 – 675 of 43,151 results

661

Sulfate, Ion chromatography standard solution, Specpure™, SO4-2 1000μg/mL

MDL Number: MFCD00145343

Pricing & Availability
Specifications

MDL Number	MFCD00145343

662

Nitrite, Ion chromatography standard solution, Specpure™, NO2- 1000 μg/mL

MDL Number: MFCD00144923

Pricing & Availability
Specifications

MDL Number	MFCD00144923

663

Potassium Chloride Conductivity Standard, 1413 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

664

Thermo Scientific Chemicals HEPES sodium salt, 99%

CAS: 75277-39-3 Molecular Formula: C8H17N2NaO4S Molecular Weight (g/mol): 260.28 MDL Number: MFCD00036463 InChI Key: RDZTWEVXRGYCFV-UHFFFAOYSA-M Synonym: 2-[4-(2-Hydroxyethyl)-1-piperazine]ethanesulfonic acid sodium salt PubChem CID: 2724248 ChEBI: CHEBI:46758 IUPAC Name: sodium 2-[4-(2-hydroxyethyl)piperazin-1-yl]ethane-1-sulfonate SMILES: [Na+].OCCN1CCN(CCS([O-])(=O)=O)CC1

Pricing & Availability
Specifications

PubChem CID	2724248
CAS	75277-39-3
Molecular Weight (g/mol)	260.28
ChEBI	CHEBI:46758
MDL Number	MFCD00036463
SMILES	[Na+].OCCN1CCN(CCS([O-])(=O)=O)CC1
Synonym	2-[4-(2-Hydroxyethyl)-1-piperazine]ethanesulfonic acid sodium salt
IUPAC Name	sodium 2-[4-(2-hydroxyethyl)piperazin-1-yl]ethane-1-sulfonate
InChI Key	RDZTWEVXRGYCFV-UHFFFAOYSA-M
Molecular Formula	C8H17N2NaO4S

665

Thermo Scientific Chemicals Sodium bicarbonate, 1M buffer soln., pH 9.4

CAS: 144-55-8 Molecular Formula: CHNaO3 Molecular Weight (g/mol): 84.01 MDL Number: MFCD00003528 InChI Key: UIIMBOGNXHQVGW-UHFFFAOYSA-M PubChem CID: 516892 ChEBI: CHEBI:32139 IUPAC Name: sodium;hydrogen carbonate SMILES: [Na+].OC([O-])=O

Pricing & Availability
Specifications

PubChem CID	516892
CAS	144-55-8
Molecular Weight (g/mol)	84.01
ChEBI	CHEBI:32139
MDL Number	MFCD00003528
SMILES	[Na+].OC([O-])=O
IUPAC Name	sodium;hydrogen carbonate
InChI Key	UIIMBOGNXHQVGW-UHFFFAOYSA-M
Molecular Formula	CHNaO3

666

Methylmagnesium chloride, 3M (22 wt.%) solution in THF, AcroSeal™

CAS: 676-58-4 Molecular Formula: CH3ClMg Molecular Weight (g/mol): 74.79 MDL Number: MFCD00000468 InChI Key: RQNMYNYHBQQZSP-UHFFFAOYSA-M Synonym: methylmagnesium chloride,chloromethylmagnesium,chloro methyl magnesium,magnesium, chloromethyl,memgcl,methylmagnesiumchloride,methyl magnesium chloride,unii-m5e1132g4w,ch3mgcl,qmabhcaih@ PubChem CID: 12670 IUPAC Name: chloro(methyl)magnesium SMILES: C[Mg]Cl

Pricing & Availability
Specifications

PubChem CID	12670
CAS	676-58-4
Molecular Weight (g/mol)	74.79
MDL Number	MFCD00000468
SMILES	C[Mg]Cl
Synonym	methylmagnesium chloride,chloromethylmagnesium,chloro methyl magnesium,magnesium, chloromethyl,memgcl,methylmagnesiumchloride,methyl magnesium chloride,unii-m5e1132g4w,ch3mgcl,qmabhcaih@
IUPAC Name	chloro(methyl)magnesium
InChI Key	RQNMYNYHBQQZSP-UHFFFAOYSA-M
Molecular Formula	CH3ClMg

667

Thermo Scientific Chemicals MES, 0.2M buffer soln., pH 6.0

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

668

Thermo Scientific™ Sodium cacodylate, 0.1M buffer soln., pH 7.0

CAS: 6131-99-3 Molecular Formula: C2H6AsNaO2 Molecular Weight (g/mol): 159.98 MDL Number: MFCD00149079 InChI Key: IHQKEDIOMGYHEB-UHFFFAOYSA-M IUPAC Name: sodium dimethylarsinate SMILES: [Na+].C[As](C)([O-])=O

Pricing & Availability
Specifications

CAS	6131-99-3
Molecular Weight (g/mol)	159.98
MDL Number	MFCD00149079
SMILES	[Na+].C[As](C)([O-])=O
IUPAC Name	sodium dimethylarsinate
InChI Key	IHQKEDIOMGYHEB-UHFFFAOYSA-M
Molecular Formula	C2H6AsNaO2

669

MilliporeSigma™ Refractive Index Brix Standards

For determining Brix value by refractometers

Pricing & Availability

670

Phosphate Standard, (1mL = 1mg PO₄), 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

671

Sodium thiosulfate, 1.0N Standardized Solution

CAS: 7772-98-7 Molecular Formula: Na2O3S2 Molecular Weight (g/mol): 158.10 MDL Number: MFCD00003499 InChI Key: AKHNMLFCWUSKQB-UHFFFAOYSA-L PubChem CID: 24477 IUPAC Name: disodium sulfanidesulfonate SMILES: [Na+].[Na+].[O-]S([S-])(=O)=O

Pricing & Availability
Specifications

PubChem CID	24477
CAS	7772-98-7
Molecular Weight (g/mol)	158.10
MDL Number	MFCD00003499
SMILES	[Na+].[Na+].[O-]S([S-])(=O)=O
IUPAC Name	disodium sulfanidesulfonate
InChI Key	AKHNMLFCWUSKQB-UHFFFAOYSA-L
Molecular Formula	Na2O3S2

672

Ammonium molybdate (di), 10% w/v aq. soln.

CAS: 27546-07-2 Molecular Formula: H2MoO4 Molecular Weight (g/mol): 161.96 MDL Number: MFCD00010882 InChI Key: VLAPMBHFAWRUQP-UHFFFAOYSA-L

Pricing & Availability
Specifications

CAS	27546-07-2
Molecular Weight (g/mol)	161.96
MDL Number	MFCD00010882
InChI Key	VLAPMBHFAWRUQP-UHFFFAOYSA-L
Molecular Formula	H2MoO4

673

Phosphate Buffer pH 7.2, For BOD, Certified, LabChem™

Pricing & Availability
Specifications

Linear Formula	KH₂PO₄
Color	Colorless
Traceability to NIST	Traceable to NIST
Physical Form	Liquid
Chemical Name or Material	Phosphate Buffer pH 7.2
Grade	Certified
Identification	Passes Test
Density	1g/mL
Name Note	For BOD
CAS	12125-02-9
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	Gaseous Ammonia; Phosphorus oxides
Health Hazard 2	GHS H Statement Solution is not hazardous.
Solubility Information	Soluble in water
Packaging	Poly Bottle
pH	7.2 ±0.1
Recommended Storage	Room Temperature
Formula Weight	136.09
Specific Gravity	1g/mL
CAS Max %	0.17

674

Sodium hydroxide, 20% w/v aq. soln.

CAS: 1310-73-2 Molecular Formula: HNaO Molecular Weight (g/mol): 39.997 MDL Number: MFCD00003548 InChI Key: HEMHJVSKTPXQMS-UHFFFAOYSA-M Synonym: sodium hydroxide,caustic soda,sodium hydrate,white caustic,soda lye,aetznatron,ascarite,sodium hydroxide na oh,sodium hydroxide solution,soda, caustic PubChem CID: 14798 ChEBI: CHEBI:32145 IUPAC Name: sodium;hydroxide SMILES: [OH-].[Na+]

Pricing & Availability
Specifications

PubChem CID	14798
CAS	1310-73-2
Molecular Weight (g/mol)	39.997
ChEBI	CHEBI:32145
MDL Number	MFCD00003548
SMILES	[OH-].[Na+]
Synonym	sodium hydroxide,caustic soda,sodium hydrate,white caustic,soda lye,aetznatron,ascarite,sodium hydroxide na oh,sodium hydroxide solution,soda, caustic
IUPAC Name	sodium;hydroxide
InChI Key	HEMHJVSKTPXQMS-UHFFFAOYSA-M
Molecular Formula	HNaO

675

Diisobutylaluminium hydride, 1.1M solution in cyclohexane, AcroSeal™

CAS: 1191-15-7 | C₈H₁₉Al

Pricing & Availability
Specifications

Linear Formula	[(CH₃)₂CHCH₂]₂AIH
Color	Undesignated
Physical Form	Solution
Chemical Name or Material	Diisobutylaluminium hydride
Merck Index	15, 3212
Concentration	19.5 to 20.5% (DIBAL-H, on Al basis)
Density	0.7800g/mL
Name Note	1.1M Solution in Cyclohexane
Fieser	01,260; 02,140; 03,101; 04,158; 05,224; 06,198; 07,111; 08,173; 09,171; 10,149; 11,185; 12,191; 13,115; 14,138; 15,137; 16,27; 17,123
CAS	110-82-7
Health Hazard 3	GHS P Statement: IF SWALLOWED: rinse mouth. Do NOT induce vomiting. Wear eye protection/face protection. 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 or doctor/physician. Avoid breathing dust/fume/gas/mist/vapors/spray. IF SWALLOWED: Immediately call a POISON CENTRE or doctor/physician. Do NOT induce vomiting. Avoid release to the environment. Store in a dry place. Store in a closed container. IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing. 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	MFCD00008928
Health Hazard 2	GHS H Statement: May be fatal if swallowed and enters airways. May cause drowsiness or dizziness. Causes severe skin burns and eye damage. Very toxic to aquatic life with long lasting effects. In contact with water releases flammable gases which may ignite spontaneously.
Flash Point	−018°C
Solubility Information	Solubility in water: vigorous reaction. Other solubilities: miscible with saturated aliphatic and aromatic, hydrocarbons
Health Hazard 1	Danger
Synonym	DIBAL-H, 1.1M solution in cyclohexane
Beilstein	04, IV, 4400
Molecular Formula	C₈H₁₉Al
Formula Weight	142.22
Specific Gravity	0.78
Melting Point	-70.0°C

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Buffers and Standards

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Potassium Chloride Conductivity Standard, 1413 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

Phosphate Buffer pH 7.2, For BOD, Certified, LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Potassium Chloride Conductivity Standard, 1413 μS/cm at 25°C, Ricca Chemical

Phosphate Buffer pH 7.2, For BOD, Certified, LabChem™