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 (22,877)

Spectroscopy Standards (5,748)

General Chemistry Solutions (5,081)

Matrix Blanks and Standardization Solutions (4,294)

Life Science Buffers (4,125)

Electrochemistry Buffers (2,350)

Environmental Testing Standards (1,889)

Electrochemistry Standards (1,245)

Karl Fischer Buffers and Reagents (467)

Isotope Standards (344)

Viscosity Standards (257)

Quality Control and Proficiency Samples (184)

Kjeldahl Buffers and Reagents (90)

Gel Filtration Standards (59)

Matrix Modifiers (29)

Osmolality Standards (13)

Smoke Point Reference (10)

Polarimetric Standards (6)

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Grade

AAS (55)
AAS Standard (11)
ACS (55)
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ACS/ASTM E 200/AOAC/EPA (7)
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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)
>11.5 (2)
>12 (44)
>13 (100)
>8 (1)
<0.5 (3)
<1 (99)

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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)
Colorless Liquid (1)
Crystalline (17)

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Technique

AA (469)
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 (374)
Buffer, Storage (2)
Calibration (8)
Cleaning (1)
Colored pH Buffer (35)

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Search Within Results

2,251 – 2,265 of 43,729 results

2,251

Thermo Scientific™ TRIS, 1.0M buffer soln., pH 8.0

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

2,252

Ketorolac tromethamine, Thermo Scientific™

CAS: 74103-07-4 Molecular Formula: C19H24N2O6 Molecular Weight (g/mol): 376.41 MDL Number: 00887595 InChI Key: BWHLPLXXIDYSNW-UHFFFAOYNA-N IUPAC Name: 2-amino-2-(hydroxymethyl)propane-1,3-diol; 5-benzoyl-2,3-dihydro-1H-pyrrolizine-1-carboxylic acid SMILES: NC(CO)(CO)CO.OC(=O)C1CCN2C1=CC=C2C(=O)C1=CC=CC=C1

Pricing & Availability
Specifications

CAS	74103-07-4
Molecular Weight (g/mol)	376.41
MDL Number	00887595
SMILES	NC(CO)(CO)CO.OC(=O)C1CCN2C1=CC=C2C(=O)C1=CC=CC=C1
IUPAC Name	2-amino-2-(hydroxymethyl)propane-1,3-diol; 5-benzoyl-2,3-dihydro-1H-pyrrolizine-1-carboxylic acid
InChI Key	BWHLPLXXIDYSNW-UHFFFAOYNA-N
Molecular Formula	C19H24N2O6

2,253

CERILLIANT™ Cannabinol Solution, 1.0 mg/mL in methanol, Sold by MilliporeSigma™ Supelco™

This analytical reference standard is suitable in LC/MS or GC/MS testing methods for applications in urine drug testing, clinical toxicology, pharmaceutical research, and forensic analysis.

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2,254

Niobium, plasma standard solution, Specpure™ Nb 10,000μg/mL, Thermo Scientific Chemicals

MDL Number: MFCD00011126

Pricing & Availability
Specifications

MDL Number	MFCD00011126

2,255

Sulfur in Isooctane standard solution, Specpure™, 750μg/g (0.0750%)

MDL Number: MFCD00804269

Pricing & Availability
Specifications

MDL Number	MFCD00804269

2,256

Lead in Isooctane standard solution, Specpure™, 370μg/g(1.0g/gal)

CAS: 540-84-1 Molecular Formula: C8H18 Molecular Weight (g/mol): 114.232 MDL Number: MFCD01094200 InChI Key: NHTMVDHEPJAVLT-UHFFFAOYSA-N PubChem CID: 10907 ChEBI: CHEBI:62805 IUPAC Name: 2,2,4-trimethylpentane SMILES: CC(C)CC(C)(C)C

Pricing & Availability
Specifications

PubChem CID	10907
CAS	540-84-1
Molecular Weight (g/mol)	114.232
ChEBI	CHEBI:62805
MDL Number	MFCD01094200
SMILES	CC(C)CC(C)(C)C
IUPAC Name	2,2,4-trimethylpentane
InChI Key	NHTMVDHEPJAVLT-UHFFFAOYSA-N
Molecular Formula	C8H18

2,257

ICP-MS Calibration Standard solution for 6020 CLP-M, Specpure™

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2,258

Diethylzinc, 1.5M solution in toluene, AcroSeal™

CAS: 557-20-0 | C4H10Zn | 123.50 g/mol

Pricing & Availability
Specifications

Linear Formula	(C₂H₅)₂Zn
Molecular Weight (g/mol)	123.50
Color	Colorless
Physical Form	Liquid
Chemical Name or Material	Diethylzinc
SMILES	CC[Zn]CC
Merck Index	15, 3151
Concentration	1.4 to 1.6M
InChI Key	HQWPLXHWEZZGKY-UHFFFAOYSA-N
Density	0.9130g/mL
PubChem CID	11185
Name Note	1.5M Solution in Toluene
CAS	108-88-3
Health Hazard 3	GHS P Statement Wear protective gloves/protective clothing/eye protection/face protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. 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. Store in a dry place. Store in a closed container.
MDL Number	MFCD00009021
Health Hazard 2	GHS H Statement Highly flammable liquid and vapor. In contact with water releases flammable gases which may ignite spontaneously. May be fatal if swallowed and enters airways. Causes severe skin burns and eye damage. May cause drowsiness or dizziness. Suspected of damaging the unborn child. May cause damage to organs through prolonged or repeated exposure. Toxic to aquatic life with long lasting effects. Reacts violently with water.
Solubility Information	Solubility in water: reacts violently. Other solubilities: miscible with most hydrocarbons
Health Hazard 1	Danger
Synonym	diethylzinc,zinc, diethyl,diethyl zinc,zinc ethide,zinc ethyl,unii-s0w5nqh7c6,et2zn,znet2,s0w5nqh7c6,c2h5 2zn
IUPAC Name	diethylzinc
Molecular Formula	C4H10Zn
Formula Weight	123.5
Specific Gravity	0.913

2,259

Potassium chloride, 0.005M, Conductivity Standard

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

2,260

ICP-MS Internal Standard for 6020, Specpure™

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2,261

Lead in Isooctane standard solution, Specpure™, 111μg/g(0.300g/gal)

Pricing & Availability
Specifications

PubChem CID	10907
CAS	540-84-1
Molecular Weight (g/mol)	114.232
ChEBI	CHEBI:62805
MDL Number	MFCD01094200
SMILES	CC(C)CC(C)(C)C
IUPAC Name	2,2,4-trimethylpentane
InChI Key	NHTMVDHEPJAVLT-UHFFFAOYSA-N
Molecular Formula	C8H18

2,262

Magnesium, AAS standard solution, Specpure™ Mg 1000μg/mL

CAS: 7439-95-4 Molecular Formula: Mg Molecular Weight (g/mol): 24.30 MDL Number: MFCD00085308 InChI Key: JLVVSXFLKOJNIY-UHFFFAOYSA-N PubChem CID: 5462224 ChEBI: CHEBI:25107 IUPAC Name: magnesium SMILES: [Mg]

Pricing & Availability
Specifications

PubChem CID	5462224
CAS	7439-95-4
Molecular Weight (g/mol)	24.30
ChEBI	CHEBI:25107
MDL Number	MFCD00085308
SMILES	[Mg]
IUPAC Name	magnesium
InChI Key	JLVVSXFLKOJNIY-UHFFFAOYSA-N
Molecular Formula	Mg