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 (22,947)

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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)
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Technique

AA (469)
Acidimetry (3)
Calibrating the absorbance of spectrophotometers (1)
Calibration (7)
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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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3,766 – 3,780 of 43,825 results

3,766

MilliporeSigma™ Calbiochem™ OmniPur™ 100X TE Buffer Solution Liquid Concentrate

For use in molecular biology applications

Pricing & Availability

3,767

Buffer solution pH 5, Acetate buffer

CAS: 64-19-7

Pricing & Availability

3,768

Thermo Scientific™ Phosphate-Buffered Saline (10X), pH 7.4, low endotoxin

Pricing & Availability
Specifications

Color	Colorless
Physical Form	Liquid
Chemical Name or Material	Phosphate Buffered Saline (PBS)
Recommended Storage	Ambient temperatures
For Use With (Application)	Contains 100mM sodium phosphate dibasic, 20mM potassium phosphate monobasic, 27mM KCl, 1.37M NaCl, pH 7.4 ± 0.2.

3,769

CERILLIANT™ Buprenorphine-D₄ Solution, 100 μg/mL in methanol, Sold by MilliporeSigma™ Supelco™

An internal standard suitable for buprenorphine testing or isotope dilution methods by GC/MS or LC/MS for clinical toxicology, pain prescription monitoring, urine drug testing, or forensic analysis.

Pricing & Availability

3,770

Folin and Ciocalteu's Phenol Reagent, Sigma-Aldrich

Pricing & Availability
Specifications

pH	<0.5
Packaging	Glass Bottle
Chemical Name or Material	Folin and Ciocalteu’s Phenol Reagent
Concentration	1.9 to 2.1 N

3,771

Triethyloxonium tetrafluoroborate, 1M solution in methylene chloride

CAS: 368-39-8 | C6H15BF4O | 189.99 g/mol

Pricing & Availability
Specifications

Linear Formula	(C₂H₅)₃OBF₄
Molecular Weight (g/mol)	189.99
Chemical Name or Material	Triethyloxonium tetrafluoroborate
SMILES	F[B-](F)(F)F.CC[O+](CC)CC
InChI Key	IYDQMLLDOVRSJJ-UHFFFAOYSA-N
Density	1.3280g/mL
PubChem CID	2723982
Name Note	1M Solution in Methylene Chloride
Fieser	01,1210; 02,430; 03,303; 04,527; 05,691; 06,611; 07,386; 08,500; 09,482; 10,417; 15,337
CAS	75-09-2
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. Use personal protective equipment as required. Store in a dry place. Store in a closed container. 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	MFCD00044423
Health Hazard 2	GHS H Statement: Suspected of causing cancer. Causes severe skin burns and eye damage. Reacts violently with water.
Solubility Information	Solubility in water: reacts.
Health Hazard 1	Danger
Synonym	triethyloxonium tetrafluoroborate,triethyloxonium fluoroborate,triethyloxonium fluoborate,triethyloxonium borofluoride,triethoxonium fluoroborate,meerwein's reagent,triethyloxidanium tetrafluoroborate,unii-z0b19dd36j,triethyloxonium tetraflouroborate,boron tetrafluoride triethyl oxonium
TSCA	TSCA
IUPAC Name	tetrafluoroboranuide; triethyloxidanium
Molecular Formula	C6H15BF4O
EINECS Number	206-705-1
Formula Weight	189.99
Specific Gravity	1.328

3,772

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

3,773

Thermo Scientific Chemicals BIS-TRIS propane, 0.2M buffer soln., pH 8.0

CAS: 64431-96-5 Molecular Formula: C11H26N2O6 Molecular Weight (g/mol): 282.337 MDL Number: MFCD00004689 InChI Key: HHKZCCWKTZRCCL-UHFFFAOYSA-N PubChem CID: 125132 ChEBI: CHEBI:40947 IUPAC Name: 2-[3-[[1,3-dihydroxy-2-(hydroxymethyl)propan-2-yl]amino]propylamino]-2-(hydroxymethyl)propane-1,3-diol SMILES: C(CNC(CO)(CO)CO)CNC(CO)(CO)CO

Pricing & Availability
Specifications

PubChem CID	125132
CAS	64431-96-5
Molecular Weight (g/mol)	282.337
ChEBI	CHEBI:40947
MDL Number	MFCD00004689
SMILES	C(CNC(CO)(CO)CO)CNC(CO)(CO)CO
IUPAC Name	2-[3-[[1,3-dihydroxy-2-(hydroxymethyl)propan-2-yl]amino]propylamino]-2-(hydroxymethyl)propane-1,3-diol
InChI Key	HHKZCCWKTZRCCL-UHFFFAOYSA-N
Molecular Formula	C11H26N2O6

3,774

CAPS, 0.5M buffer soln., pH 9.0, Thermo Scientific™

Pricing & Availability
Specifications

CAS	1135-40-6
Molecular Weight (g/mol)	221.32
MDL Number	MFCD00003837
Physical Form	Liquid
pH	9.0
SMILES	OS(=O)(=O)CCCNC1CCCCC1
Recommended Storage	Ambient temperatures
Concentration	0.5 M
IUPAC Name	3-(cyclohexylamino)propane-1-sulfonic acid
InChI Key	PJWWRFATQTVXHA-UHFFFAOYSA-N
Molecular Formula	C9H19NO3S

3,775

MilliporeSigma™ Tris Base, ULTROL™ Grade, Calbiochem™,

CAS: 77-86-1 Molecular Formula: C4H11NO3 Molecular Weight (g/mol): 121.136 InChI Key: LENZDBCJOHFCAS-UHFFFAOYSA-N Synonym: tris(Hydroxymethyl)aminomethane 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
SMILES	C(C(CO)(CO)N)O
Synonym	tris(Hydroxymethyl)aminomethane
IUPAC Name	2-amino-2-(hydroxymethyl)propane-1,3-diol
InChI Key	LENZDBCJOHFCAS-UHFFFAOYSA-N
Molecular Formula	C4H11NO3

3,776

MilliporeSigma™ Tris, Hydrochloride, Molecular Biology Grade, Calbiochem™,

CAS: 1185-53-1 Molecular Formula: C4H12ClNO3 Molecular Weight (g/mol): 157.594 InChI Key: QKNYBSVHEMOAJP-UHFFFAOYSA-N Synonym: tris(Hydroxymethyl)aminomethane, HCl PubChem CID: 93573 IUPAC Name: 2-amino-2-(hydroxymethyl)propane-1,3-diol;hydrochloride SMILES: C(C(CO)(CO)N)O.Cl

Pricing & Availability
Specifications

PubChem CID	93573
CAS	1185-53-1
Molecular Weight (g/mol)	157.594
SMILES	C(C(CO)(CO)N)O.Cl
Synonym	tris(Hydroxymethyl)aminomethane, HCl
IUPAC Name	2-amino-2-(hydroxymethyl)propane-1,3-diol;hydrochloride
InChI Key	QKNYBSVHEMOAJP-UHFFFAOYSA-N
Molecular Formula	C4H12ClNO3

3,777

Thermo Scientific Chemicals MES, 1.0M buffer soln., pH 7.5

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

3,778

Ponceau S, 0.1% v/v soln. in 5% acetic acid

CAS: 6226-79-5 Molecular Formula: C22H12N4Na4O13S4 Molecular Weight (g/mol): 760.552 MDL Number: MFCD00003892 InChI Key: VSXKEUCERCWGKF-STNZDNLRSA-J Synonym: ponceau s,acid red 112,ponceau s extra,ponceau red s,unii-t1c2ugs05f,c.i. acid red 112,t1c2ugs05f,3-hydroxy-4-2-sulfo-4-4-sulfophenylazo phenylazo-2,7-naphthalenedisulfonic acid sodium salt,c.i. acid red 112, tetrasodium salt,ponceau-s PubChem CID: 11320219 IUPAC Name: tetrasodium;(4Z)-3-oxo-4-[[2-sulfonato-4-[(4-sulfonatophenyl)diazenyl]phenyl]hydrazinylidene]naphthalene-2,7-disulfonate SMILES: C1=CC(=CC=C1N=NC2=CC(=C(C=C2)NN=C3C4=C(C=C(C=C4)S(=O)(=O)[O-])C=C(C3=O)S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+].[Na+].[Na+]

Pricing & Availability
Specifications

PubChem CID	11320219
CAS	6226-79-5
Molecular Weight (g/mol)	760.552
MDL Number	MFCD00003892
SMILES	C1=CC(=CC=C1N=NC2=CC(=C(C=C2)NN=C3C4=C(C=C(C=C4)S(=O)(=O)[O-])C=C(C3=O)S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+].[Na+].[Na+]
Synonym	ponceau s,acid red 112,ponceau s extra,ponceau red s,unii-t1c2ugs05f,c.i. acid red 112,t1c2ugs05f,3-hydroxy-4-2-sulfo-4-4-sulfophenylazo phenylazo-2,7-naphthalenedisulfonic acid sodium salt,c.i. acid red 112, tetrasodium salt,ponceau-s
IUPAC Name	tetrasodium;(4Z)-3-oxo-4-[[2-sulfonato-4-[(4-sulfonatophenyl)diazenyl]phenyl]hydrazinylidene]naphthalene-2,7-disulfonate
InChI Key	VSXKEUCERCWGKF-STNZDNLRSA-J
Molecular Formula	C22H12N4Na4O13S4

3,779

Thermo Scientific Chemicals CAPS, 0.5M buffer soln., pH 11.0

CAS: 1135-40-6 Molecular Formula: C9H19NO3S Molecular Weight (g/mol): 221.32 MDL Number: MFCD00003837 InChI Key: PJWWRFATQTVXHA-UHFFFAOYSA-N IUPAC Name: 3-(cyclohexylamino)propane-1-sulfonic acid SMILES: OS(=O)(=O)CCCNC1CCCCC1

Pricing & Availability
Specifications

CAS	1135-40-6
Molecular Weight (g/mol)	221.32
MDL Number	MFCD00003837
SMILES	OS(=O)(=O)CCCNC1CCCCC1
IUPAC Name	3-(cyclohexylamino)propane-1-sulfonic acid
InChI Key	PJWWRFATQTVXHA-UHFFFAOYSA-N
Molecular Formula	C9H19NO3S

3,780

Thermo Scientific Chemicals BICINE, 0.5M buffer soln., pH 8.0

CAS: 150-25-4 Molecular Formula: C6H12NNaO4 Molecular Weight (g/mol): 185.16 MDL Number: MFCD00004295 InChI Key: MFBDBXAVPLFMNJ-UHFFFAOYSA-M PubChem CID: 8761 ChEBI: CHEBI:40957 IUPAC Name: 2-[bis(2-hydroxyethyl)amino]acetic acid SMILES: [Na+].OCCN(CCO)CC([O-])=O

Pricing & Availability
Specifications

PubChem CID	8761
CAS	150-25-4
Molecular Weight (g/mol)	185.16
ChEBI	CHEBI:40957
MDL Number	MFCD00004295
SMILES	[Na+].OCCN(CCO)CC([O-])=O
IUPAC Name	2-[bis(2-hydroxyethyl)amino]acetic acid
InChI Key	MFBDBXAVPLFMNJ-UHFFFAOYSA-M
Molecular Formula	C6H12NNaO4

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