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

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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)
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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 (97)

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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 (37)
Capsule (11)
Chemvelope (1)
Clear Liquid (1)
Clear Liquid at 20°C (2)
Colorless Liquid (1)
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Solution Type

Antigen Retrieval Reagent (1)
Aqueous (3)
Buffer (588)
Buffer, Storage (4)
Calibration (8)
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Colored pH Buffer (43)

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For Use With (Application)

Accurate calibrations and NIST traceability (1)
Accurate calibrations and NIST traceability, laboratory and bench analysis (2)
Accurate calibrations and NIST traceability, portable and field analysis (1)
Accurate pH calibrations and NIST traceability, laboratory and bench analysis (8)
Accurate pH calibrations and NIST traceability, portable and field analysis (6)
Accurate, reproducible pH calibrations (15)
Agarose Gel Electrophoresis, Polyacrylamide Gel Electrophoresis (10)

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616 – 630 of 44,374 results

616

Thermo Scientific Chemicals Tris(hydroxymethyl)aminomethane hydrochloride, 1M soln., pH 7,4, RNase free

CAS: 1185-53-1 Molecular Formula: C4H12ClNO3 Molecular Weight (g/mol): 157.594 MDL Number: MFCD00012590 InChI Key: QKNYBSVHEMOAJP-UHFFFAOYSA-N Synonym: tris hydrochloride,tris hydroxymethyl aminomethane hydrochloride,2-amino-2-hydroxymethyl propane-1,3-diol hydrochloride,tromethamine hydrochloride,tris hcl,Tris-HCl,2-amino-2-hydroxymethyl-1,3-propanediol hydrochloride,tris buffer hydrochloride,1,3-propanediol, 2-amino-2-hydroxymethyl-, hydrochloride 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
MDL Number	MFCD00012590
SMILES	C(C(CO)(CO)N)O.Cl
Synonym	tris hydrochloride,tris hydroxymethyl aminomethane hydrochloride,2-amino-2-hydroxymethyl propane-1,3-diol hydrochloride,tromethamine hydrochloride,tris hcl,Tris-HCl,2-amino-2-hydroxymethyl-1,3-propanediol hydrochloride,tris buffer hydrochloride,1,3-propanediol, 2-amino-2-hydroxymethyl-, hydrochloride
IUPAC Name	2-amino-2-(hydroxymethyl)propane-1,3-diol;hydrochloride
InChI Key	QKNYBSVHEMOAJP-UHFFFAOYSA-N
Molecular Formula	C4H12ClNO3

617

EP Reference Solution Y₁, Yellow Reference Solution, Ricca Chemical

Pricing & Availability

618

Thermo Scientific Chemicals MES, 1.0M buffer soln., pH 5.5

CAS: 145224-94-8 Molecular Formula: C6H15NO5S Molecular Weight (g/mol): 213.25 MDL Number: MFCD00149409 InChI Key: MIIIXQJBDGSIKL-UHFFFAOYSA-N PubChem CID: 16218417 IUPAC Name: 2-(morpholin-4-yl)ethane-1-sulfonic acid hydrate SMILES: O.OS(=O)(=O)CCN1CCOCC1

Pricing & Availability
Specifications

PubChem CID	16218417
CAS	145224-94-8
Molecular Weight (g/mol)	213.25
MDL Number	MFCD00149409
SMILES	O.OS(=O)(=O)CCN1CCOCC1
IUPAC Name	2-(morpholin-4-yl)ethane-1-sulfonic acid hydrate
InChI Key	MIIIXQJBDGSIKL-UHFFFAOYSA-N
Molecular Formula	C6H15NO5S

619

Ethylenediaminetetraacetic Acid, in PBS, MP Biomedicals

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-[bis(carboxymethyl)amino]ethyl-(carboxylatomethyl)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-[bis(carboxymethyl)amino]ethyl-(carboxylatomethyl)amino]acetate;dihydrate
InChI Key	OVBJJZOQPCKUOR-UHFFFAOYSA-L
Molecular Formula	C10H18N2Na2O10

620

Buffer Solution pH 12.45 at 25°C, Certified, LabChem™

Pricing & Availability
Specifications

Linear Formula	Na₂HPO₄
Color	Colorless
Traceability to NIST	Traceable to NIST
Physical Form	Liquid
Chemical Name or Material	Buffer Solution pH 12.45 at 25°C
Grade	Certified
Identification	Passes Test
Density	1g/mL
CAS	1310-73-2
Decomposition Information	Phosphine; Phosphorus oxides; Phosgene; 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	12.45 ±0.05
Health Hazard 1	Danger
Recommended Storage	Room Temperature
Formula Weight	141.96
Specific Gravity	1g/mL
CAS Max %	0.16

621

Phenyltrimethylammonium hydroxide, 0.1 M in methanol

CAS: 1899-02-1 | C9H15NO | 153.23 g/mol

Pricing & Availability
Specifications

Linear Formula	C₆H₅N(CH₃)₃OH
Molecular Weight (g/mol)	153.23
ChEBI	CHEBI:85062
Color	Colorless
Physical Form	Liquid
Chemical Name or Material	Phenyltrimethylammonium hydroxide
SMILES	[OH-].C[N+](C)(C)C1=CC=CC=C1
Concentration	0.09 to 0.11M
InChI Key	HADKRTWCOYPCPH-UHFFFAOYSA-M
Density	0.8000g/mL
PubChem CID	15913
Name Note	0.1M in Methanol
CAS	67-56-1
Health Hazard 3	GHS P Statement: IF exposed: Call a POISON CENTER or doctor/physician. IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing. IF ON SKIN: Wash with plenty of soap and water. Wear protective gloves/protective clothing/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. Keep away from heat/sparks/open flames/hot surfaces. - No smoking. 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	MFCD00041899
Health Hazard 2	GHS H Statement: Highly flammable liquid and vapour. Causes skin irritation. Causes serious eye irritation. Causes damage to organs. Toxic if swallowed. Toxic in contact with skin. Toxic if inhaled. Highly flammable liquid and vapor.
Flash Point	10°C
Health Hazard 1	Danger
Synonym	methelute,phenyltrimethylammonium hydroxide,trimethylanilinium hydroxide,phenyl trimethyl ammonium hydroxide,trimethylphenylammonium hydroxide,n,n,n-trimethylbenzenaminium hydroxide,n,n,n-trimethylanilinium hydroxide,benzenaminium, n,n,n-trimethyl-, hydroxide,ptah,ammonium, phenyltrimethyl-, hydroxide
TSCA	TSCA
RTECS Number	BT2275000
Molecular Formula	C9H15NO
EINECS Number	217-592-3
Formula Weight	153.22
Specific Gravity	0.8

622

Promotions Available

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

623

Thermo Scientific Chemicals MES, 1.0M buffer soln., pH 7.0

Pricing & Availability
Specifications

PubChem CID	16218417
CAS	145224-94-8
Molecular Weight (g/mol)	213.25
MDL Number	MFCD00149409
SMILES	O.OS(=O)(=O)CCN1CCOCC1
IUPAC Name	2-(morpholin-4-yl)ethane-1-sulfonic acid hydrate
InChI Key	MIIIXQJBDGSIKL-UHFFFAOYSA-N
Molecular Formula	C6H15NO5S

624

Potassium bromate/Potassium bromide, 0.1N Standardized Solution

Molecular Formula: KBrO₃/KBr MDL Number: MFCD00011359

Pricing & Availability
Specifications

MDL Number	MFCD00011359
Molecular Formula	KBrO₃/KBr

625

Buffer solution, pH 1.00 (+/-0.026 @ 25oC), No Color, Specpure, NIST Traceable

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

Pricing & Availability
Specifications

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
Color	Colorless
Physical Form	Liquid
Health Hazard 1	H290
Chemical Name or Material	Buffer solution
TSCA	Yes
Recommended Storage	Ambient temperatures
Density	1.005
Vapor Pressure	23 hPa (17mm Hg) at 20°C

626

Potassium chloride, 1M aq. soln.

CAS: 7447-40-7 Molecular Formula: ClK Molecular Weight (g/mol): 74.55 MDL Number: MFCD00011360 InChI Key: WCUXLLCKKVVCTQ-UHFFFAOYSA-M Synonym: potassium chloride,enseal,muriate of potash,klotrix,sylvite,slow-k,potassium chloride kcl,klor-con,chlorvescent,kalitabs PubChem CID: 4873 ChEBI: CHEBI:32588 IUPAC Name: potassium chloride SMILES: [Cl-].[K+]

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Specifications

PubChem CID	4873
CAS	7447-40-7
Molecular Weight (g/mol)	74.55
ChEBI	CHEBI:32588
MDL Number	MFCD00011360
SMILES	[Cl-].[K+]
Synonym	potassium chloride,enseal,muriate of potash,klotrix,sylvite,slow-k,potassium chloride kcl,klor-con,chlorvescent,kalitabs
IUPAC Name	potassium chloride
InChI Key	WCUXLLCKKVVCTQ-UHFFFAOYSA-M
Molecular Formula	ClK

627

Thermo Scientific Chemicals TRIS, 1.0M buffer soln., pH 8.8

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

628

Sodium metatungstate, 2.82 density solution in water, stabilized

CAS: 12141-67-2 Molecular Formula: H₂Na₆O₄₀W₁₂ MDL Number: MFCD00150663 Synonym: Sodium polytungstate

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Specifications

CAS	12141-67-2
MDL Number	MFCD00150663
Synonym	Sodium polytungstate
Molecular Formula	H₂Na₆O₄₀W₁₂

629

Ultramark∣r 1621, Mass Spec Std

CAS: 105809-15-2 Molecular Formula: C6H18N3P3 Molecular Weight (g/mol): 231.189 MDL Number: MFCD00242454 InChI Key: DEBZEVJNWCNATM-MZWXYZOWSA-N PubChem CID: 44119860 IUPAC Name: 2,2,4,4,6,6-hexakis(deuteriomethyl)-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene SMILES: CP1(=NP(=NP(=N1)(C)C)(C)C)C

Pricing & Availability
Specifications

PubChem CID	44119860
CAS	105809-15-2
Molecular Weight (g/mol)	231.189
MDL Number	MFCD00242454
SMILES	CP1(=NP(=NP(=N1)(C)C)(C)C)C
IUPAC Name	2,2,4,4,6,6-hexakis(deuteriomethyl)-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene
InChI Key	DEBZEVJNWCNATM-MZWXYZOWSA-N
Molecular Formula	C6H18N3P3

630

Sodium Hydroxide, 0.250 N (N/4), 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+]

Pricing & Availability
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

Buffers and Standards

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Buffer Solution pH 12.45 at 25°C, Certified, LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer Solution pH 12.45 at 25°C, Certified, LabChem™