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 (23,985)

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General Chemistry Solutions (5,037)

Matrix Blanks and Standardization Solutions (4,259)

Life Science Buffers (4,140)

Electrochemistry Buffers (2,348)

Environmental Testing Standards (1,846)

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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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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511 – 525 of 44,335 results

511

CombiTitrant 5, MilliporeSigma™

CombiTitrant 5 one-component reagent for volumetric Karl Fischer titration H₂O Aquastar™.

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512

Buffer Solution pH 6.86 at 25°C, Certified, LabChem™

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Specifications

Linear Formula	KH₂PO₄
Color	Colorless
Traceability to NIST	Traceable to NIST
Physical Form	Liquid
Chemical Name or Material	Buffer Solution pH 6.86 at 25°C
Grade	Certified
Identification	Passes Test
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	6.86 ±0.01
Recommended Storage	Room Temperature
Formula Weight	136.09
CAS Max %	0.07

513

Buffer Solution pH 1.0 at 25°C, Certified, LabChem™

Pricing & Availability
Specifications

Linear Formula	KCl
Color	Colorless
Traceability to NIST	Traceable to NIST
Physical Form	Liquid
UN Number	UN1789
Chemical Name or Material	Buffer Solution pH 1.0 at 25°C
Grade	Certified
Identification	Passes Test
Density	1g/mL
CAS	7647-01-0
Decomposition Information	Chlorine; Thermal decomposition generates: Corrosive vapors
Health Hazard 2	GHS H Statement Causes severe skin burns and eye damage.
Solubility Information	Soluble in water
Packaging	Poly Bottle
pH	1.00 ±0.02
Health Hazard 1	Danger
Recommended Storage	Room Temperature
Formula Weight	74.55
Specific Gravity	1g/mL
CAS Max %	0.05

514

Sodium Hydroxide, 20% (w/w), Ricca Chemical

CAS: 1310-73-2 Molecular Formula: HNaO Molecular Weight (g/mol): 39.997 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+]

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Specifications

PubChem CID	14798
CAS	1310-73-2
Molecular Weight (g/mol)	39.997
ChEBI	CHEBI:32145
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

515

Thulium, plasma standard solution, Specpure™ Tm 1000μg/mL

MDL Number: MFCD00011281

Pricing & Availability
Specifications

MDL Number	MFCD00011281

516

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Thermo Scientific Chemicals CHES, 98+%, for biochemistry

CAS: 103-47-9 Molecular Formula: C8H17NO3S Molecular Weight (g/mol): 207.288 MDL Number: MFCD00003835 InChI Key: MKWKNSIESPFAQN-UHFFFAOYSA-N Synonym: 2-(Cyclohexylamino)ethanesulfonic acid PubChem CID: 66898 IUPAC Name: 2-(cyclohexylamino)ethanesulfonic acid SMILES: C1CCC(CC1)NCCS(=O)(=O)O

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Specifications

PubChem CID	66898
CAS	103-47-9
Molecular Weight (g/mol)	207.288
MDL Number	MFCD00003835
SMILES	C1CCC(CC1)NCCS(=O)(=O)O
Synonym	2-(Cyclohexylamino)ethanesulfonic acid
IUPAC Name	2-(cyclohexylamino)ethanesulfonic acid
InChI Key	MKWKNSIESPFAQN-UHFFFAOYSA-N
Molecular Formula	C8H17NO3S

517

EDTA Titrant, 0.0100 M (M/100), Ricca Chemical

CAS: 6381-92-6 Molecular Formula: C10H18N2Na2O10 Molecular Weight (g/mol): 372.24 MDL Number: MFCD00150037,MFCD00003541 InChI Key: OVBJJZOQPCKUOR-UHFFFAOYSA-L Synonym: edta disodium salt,cal-ex decalcifier,buffer solution, ph 10.00,sodium di ethylenediamine tetraacetate dihydrate,ethylenediamine tetraacetic acid, disodium salt dihydrate,ethylenediamine tetraacetic acid, disodium salt, standard solution,sodium di ethylenediamine tetraacetate standard solution,ethylenedinitrilo tetraacetic acid disodium, dihydrate, reagent, acs PubChem CID: 44120005 IUPAC Name: disodium 2-({2-[(carboxylatomethyl)(carboxymethyl)amino]ethyl}(carboxymethyl)amino)acetate dihydrate SMILES: O.O.[Na+].[Na+].OC(=O)CN(CCN(CC(O)=O)CC([O-])=O)CC([O-])=O

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Specifications

PubChem CID	44120005
CAS	6381-92-6
Molecular Weight (g/mol)	372.24
MDL Number	MFCD00150037,MFCD00003541
SMILES	O.O.[Na+].[Na+].OC(=O)CN(CCN(CC(O)=O)CC([O-])=O)CC([O-])=O
Synonym	edta disodium salt,cal-ex decalcifier,buffer solution, ph 10.00,sodium di ethylenediamine tetraacetate dihydrate,ethylenediamine tetraacetic acid, disodium salt dihydrate,ethylenediamine tetraacetic acid, disodium salt, standard solution,sodium di ethylenediamine tetraacetate standard solution,ethylenedinitrilo tetraacetic acid disodium, dihydrate, reagent, acs
IUPAC Name	disodium 2-({2-[(carboxylatomethyl)(carboxymethyl)amino]ethyl}(carboxymethyl)amino)acetate dihydrate
InChI Key	OVBJJZOQPCKUOR-UHFFFAOYSA-L
Molecular Formula	C10H18N2Na2O10

518

Buffer Solution pH 2.0 at 25°C, Certified, LabChem™

Pricing & Availability
Specifications

Linear Formula	KCl
Color	Colorless
Traceability to NIST	Traceable to NIST
Physical Form	Liquid
Chemical Name or Material	Buffer Solution pH 2.0 at 25°C
Grade	Certified
Identification	Passes Test
Density	1g/mL
CAS	7647-01-0
Decomposition Information	Hydrogen chloride
Health Hazard 2	GHS H Statement Causes skin and serious eye irritation.
Solubility Information	Soluble in water
pH	2.00 ±0.01
Health Hazard 1	Warning
Recommended Storage	Room Temperature
Formula Weight	74.55
Specific Gravity	1g/mL
CAS Max %	0.04

519

Multi-Element Organometallic Oil Standards 23 Element, 100μg/g; SPEX CertiPrep™

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

Pricing & Availability
Specifications

Type	Certified Reference Material
Concentration or Composition Notes	Up to 68 elements are scanned with found values for ICP and ICP-MS standards. The found value of the trace metallic impurities is reported on the Certificate of Analysis.
For Use With (Equipment)	AA, ICP, ICP/MS, IC, XRF, and Other Analytical Instrumentation
Industry Type	Petrochemical Testing
Element	Al,Ba,B
Health Hazard 1	Causes skin irritation, serious eye irritation
Packaging	Triple-leached LDPE bottle
DOT Information	Nonhazardous
Chemical Name or Material	23 Element Oil Standard
Recommended Storage	Ambient
Solvent or Matrix	Base Oil 75
Analyte or Component Names	Al,Ba,B

520

Thermo Scientific Chemicals Ionic strength adjuster solution for sodium electrode

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521

VeriSpec™ Chloride - Cl^- Standard for Ion Chromatography 1000 ppm in H₂O, Ricca Chemical

CAS: 7647-14-5 Molecular Formula: ClNa Molecular Weight (g/mol): 58.44 MDL Number: MFCD00003477 InChI Key: FAPWRFPIFSIZLT-UHFFFAOYSA-M PubChem CID: 5234 ChEBI: CHEBI:26710 IUPAC Name: sodium chloride SMILES: [Na+].[Cl-]

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Specifications

PubChem CID	5234
CAS	7647-14-5
Molecular Weight (g/mol)	58.44
ChEBI	CHEBI:26710
MDL Number	MFCD00003477
SMILES	[Na+].[Cl-]
IUPAC Name	sodium chloride
InChI Key	FAPWRFPIFSIZLT-UHFFFAOYSA-M
Molecular Formula	ClNa

522

Boron standard solution, for AAS, 1 mg/ml B in water

CAS: 7440-42-8 | B | 10.81 g/mol

Pricing & Availability
Specifications

Molecular Weight (g/mol)	10.81
ChEBI	CHEBI:27560
Solubility	Soluble in water
Physical Form	Solution
Chemical Name or Material	Boron standard solution
Grade	AAS
SMILES	[B]
Merck Index	14, 1343
Concentration	997 to 1003 μg/mL of B in water (20°C)
InChI Key	ZOXJGFHDIHLPTG-UHFFFAOYSA-N
PubChem CID	5462311
CAS	7440-42-8
MDL Number	MFCD00134034 MFCD00151272
Packaging	Plastic bottle
TSCA	TSCA
RTECS Number	ED7350000
IUPAC Name	boron
Molecular Formula	B
EINECS Number	231-151-2
Formula Weight	10.81

523

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Thermo Scientific Chemicals Tricine, 98%, for biochemistry

CAS: 4-1-5704 Molecular Formula: C6H13NO5 Molecular Weight (g/mol): 179.17 MDL Number: MFCD00004277 InChI Key: SEQKRHFRPICQDD-UHFFFAOYSA-N Synonym: N-(2-Hydroxy-1, 1-bis(hydroxymethyl)ethyl)glycine,N-[Tris(hydroxymethyl)methyl]glycine PubChem CID: 79784 ChEBI: CHEBI:39063 IUPAC Name: 2-[[1,3-dihydroxy-2-(hydroxymethyl)propan-2-yl]amino]acetic acid SMILES: C(C(=O)O)NC(CO)(CO)CO

Pricing & Availability
Specifications

PubChem CID	79784
CAS	4-1-5704
Molecular Weight (g/mol)	179.17
ChEBI	CHEBI:39063
MDL Number	MFCD00004277
SMILES	C(C(=O)O)NC(CO)(CO)CO
Synonym	N-(2-Hydroxy-1, 1-bis(hydroxymethyl)ethyl)glycine,N-[Tris(hydroxymethyl)methyl]glycine
IUPAC Name	2-[[1,3-dihydroxy-2-(hydroxymethyl)propan-2-yl]amino]acetic acid
InChI Key	SEQKRHFRPICQDD-UHFFFAOYSA-N
Molecular Formula	C6H13NO5

524

PubChem CID	14798
CAS	1310-73-2
Molecular Weight (g/mol)	39.997
ChEBI	CHEBI:32145
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

525

Sulfuric acid, 5.0N Standardized Solution

CAS: 7664-93-9 Molecular Formula: H2O4S Molecular Weight (g/mol): 98.07 MDL Number: MFCD00064589 InChI Key: QAOWNCQODCNURD-UHFFFAOYSA-N PubChem CID: 1118 ChEBI: CHEBI:26836 IUPAC Name: sulfuric acid SMILES: OS(O)(=O)=O

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Specifications

PubChem CID	1118
CAS	7664-93-9
Molecular Weight (g/mol)	98.07
ChEBI	CHEBI:26836
MDL Number	MFCD00064589
SMILES	OS(O)(=O)=O
IUPAC Name	sulfuric acid
InChI Key	QAOWNCQODCNURD-UHFFFAOYSA-N
Molecular Formula	H2O4S

Buffers and Standards

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Buffer Solution pH 1.0 at 25°C, Certified, LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer Solution pH 1.0 at 25°C, Certified, LabChem™