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 (23,990)

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Gel Filtration Standards (55)

Matrix Modifiers (29)

Osmolality Standards (12)

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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)
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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 (3)
Buffer (469)
Buffer, Storage (4)
Calibration (8)
Cleaning, Storage, pH Buffer (15)
Colored pH Buffer (35)

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Search Within Results

241 – 255 of 44,325 results

241

Phosphate Phosphorus Standard, 25 ppm P (76.7 ppm PO₄³^-), Ricca Chemical

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

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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

242

Thermo Scientific Chemicals Sodium phosphate, 0.5M buffer soln., pH 7.0

Pricing & Availability
Specifications

MDL Number	MFCD00146206
Solubility Information	Fully miscible.
Physical Form	Liquid
pH	7.0
Chemical Name or Material	Sodium phosphate buffer soln.
TSCA	Yes
Recommended Storage	Ambient temperatures
Concentration	0.5 M

243

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

244

Promotions Available

ChromaCare™ LC-MS Instrument Flush Solution

ChromaCare™ LC-MS Instrument Flush Solution is designed to prepare LC/MS instruments for start-up. By reducing background noise, this solution facilitates instrument installation and preventative maintenance routines. ∣ CAS: 75-05-8; 67-56-1; 67-63-0; 7732-18-5

Pricing & Availability
Specifications

Percent Purity	25% Acetonitrile, 25% Methanol, 25% Water, 25% 2-Propanol (IPA)
CAS	75-05-8; 67-56-1; 67-63-0; 7732-18-5
Color	Colorless
Physical Form	Liquid
Grade	LC-MS

245

Iodine (Iodine-Iodide), 0.0200 N (N/50), Ricca Chemical

Molecular Formula: I2 MDL Number: MFCD00011355 MFCD00164163 InChI Key: PNDPGZBMCMUPRI-UHFFFAOYSA-N Synonym: iodine,diiodine,iodine crystals,iodine sublimed,tincture iodine,vistarin,eranol,iodio,iodine solution,iode PubChem CID: 807 ChEBI: CHEBI:17606 IUPAC Name: diiodine SMILES: II

Pricing & Availability
Specifications

PubChem CID	807
ChEBI	CHEBI:17606
MDL Number	MFCD00011355 MFCD00164163
SMILES	II
Synonym	iodine,diiodine,iodine crystals,iodine sublimed,tincture iodine,vistarin,eranol,iodio,iodine solution,iode
IUPAC Name	diiodine
InChI Key	PNDPGZBMCMUPRI-UHFFFAOYSA-N
Molecular Formula	I2

246

Bis-Tris, ≥98% (Dry Basis), Ultrapure

CAS: 6976-37-0 Molecular Formula: C8H19NO5 Molecular Weight (g/mol): 209.242 MDL Number: MFCD00002853 InChI Key: OWMVSZAMULFTJU-UHFFFAOYSA-N Synonym: bis[2 to Hydroxyethyl]imino to tris[hydroxymethyl]methane PubChem CID: 81462 ChEBI: CHEBI:41250 IUPAC Name: 2-[bis(2-hydroxyethyl)amino]-2-(hydroxymethyl)propane-1,3-diol SMILES: C(CO)N(CCO)C(CO)(CO)CO

Pricing & Availability
Specifications

PubChem CID	81462
CAS	6976-37-0
Molecular Weight (g/mol)	209.242
ChEBI	CHEBI:41250
MDL Number	MFCD00002853
SMILES	C(CO)N(CCO)C(CO)(CO)CO
Synonym	bis[2 to Hydroxyethyl]imino to tris[hydroxymethyl]methane
IUPAC Name	2-[bis(2-hydroxyethyl)amino]-2-(hydroxymethyl)propane-1,3-diol
InChI Key	OWMVSZAMULFTJU-UHFFFAOYSA-N
Molecular Formula	C8H19NO5

247

Carbon Standard, (Potassium Hydrogen Phthalate), Certified, 1000ppm ±10ppm Organic (1mL = 1mg C) , LabChem™

CAS: 877-24-7 Molecular Formula: C8H5KO4 Molecular Weight (g/mol): 204.222 InChI Key: IWZKICVEHNUQTL-UHFFFAOYSA-M PubChem CID: 23676735 IUPAC Name: potassium;2-carboxybenzoate SMILES: C1=CC=C(C(=C1)C(=O)O)C(=O)[O-].[K+]

Pricing & Availability
Specifications

PubChem CID	23676735
CAS	877-24-7
Molecular Weight (g/mol)	204.222
SMILES	C1=CC=C(C(=C1)C(=O)O)C(=O)[O-].[K+]
IUPAC Name	potassium;2-carboxybenzoate
InChI Key	IWZKICVEHNUQTL-UHFFFAOYSA-M
Molecular Formula	C8H5KO4

248

Buffer solution pH 4.01 (+/-0.022 @ 25oC) No Color Specpure NIST Traceable

CAS: 1336-21-6 | H5NO | 35.05 g/mol

Pricing & Availability
Specifications

Molecular Weight (g/mol)	35.05
ChEBI	CHEBI:18219
Color	Colorless
Physical Form	Liquid
Chemical Name or Material	Buffer solution
SMILES	N.O
InChI Key	VHUUQVKOLVNVRT-UHFFFAOYSA-N
Vapor Pressure	23 hPa (17mm Hg) at 20°C
PubChem CID	14923
MDL Number	MFCD00066650
Solubility Information	Miscible with water.
TSCA	Yes
Recommended Storage	Ambient temperatures
IUPAC Name	azanium;hydroxide
Molecular Formula	H5NO
Odor	Odorless

249

Sodium Citrate, 3.8% (w/v), Ricca Chemical

CAS: 6132-04-3 Molecular Formula: C6H9Na3O9 Molecular Weight (g/mol): 294.10 InChI Key: NLJMYIDDQXHKNR-UHFFFAOYSA-K Synonym: trisodium citrate dihydrate,sodium citrate dihydrate,sodium citrate tribasic dihydrate,natriumcitrat-dihydrat,sodium citrate hydrate,1,2,3-propanetricarboxylic acid, 2-hydroxy-, trisodium salt, dihydrate,citronensaeure-tri-na-salz-dihydrat,citric acid trisodium salt dihydrate,citric acid, trisodium salt dihydrate,trisodium 2-hydroxypropane-1,2,3-tricarboxylate dihydrate PubChem CID: 71474 ChEBI: CHEBI:32142 IUPAC Name: trisodium;2-hydroxypropane-1,2,3-tricarboxylate;dihydrate SMILES: C(C(=O)[O-])C(CC(=O)[O-])(C(=O)[O-])O.O.O.[Na+].[Na+].[Na+]

Pricing & Availability
Specifications

PubChem CID	71474
CAS	6132-04-3
Molecular Weight (g/mol)	294.10
ChEBI	CHEBI:32142
SMILES	C(C(=O)[O-])C(CC(=O)[O-])(C(=O)[O-])O.O.O.[Na+].[Na+].[Na+]
Synonym	trisodium citrate dihydrate,sodium citrate dihydrate,sodium citrate tribasic dihydrate,natriumcitrat-dihydrat,sodium citrate hydrate,1,2,3-propanetricarboxylic acid, 2-hydroxy-, trisodium salt, dihydrate,citronensaeure-tri-na-salz-dihydrat,citric acid trisodium salt dihydrate,citric acid, trisodium salt dihydrate,trisodium 2-hydroxypropane-1,2,3-tricarboxylate dihydrate
IUPAC Name	trisodium;2-hydroxypropane-1,2,3-tricarboxylate;dihydrate
InChI Key	NLJMYIDDQXHKNR-UHFFFAOYSA-K
Molecular Formula	C6H9Na3O9

250

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

251

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hydrogen peroxide, 3 wt.% solution in water, stabilized

CAS: 7722-84-1 Molecular Formula: H2O2 Molecular Weight (g/mol): 34.014 MDL Number: MFCD00011333 InChI Key: MHAJPDPJQMAIIY-UHFFFAOYSA-N Synonym: oxydol,perhydrol,superoxol,interox,hydrogen dioxide,inhibine,peroxaan,albone,hioxyl,kastone PubChem CID: 784 ChEBI: CHEBI:16240 IUPAC Name: hydrogen peroxide SMILES: OO

Pricing & Availability
Specifications

PubChem CID	784
CAS	7722-84-1
Molecular Weight (g/mol)	34.014
ChEBI	CHEBI:16240
MDL Number	MFCD00011333
SMILES	OO
Synonym	oxydol,perhydrol,superoxol,interox,hydrogen dioxide,inhibine,peroxaan,albone,hioxyl,kastone
IUPAC Name	hydrogen peroxide
InChI Key	MHAJPDPJQMAIIY-UHFFFAOYSA-N
Molecular Formula	H2O2

252

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Thermo Scientific Chemicals MES monohydrate, 98%

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

253

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Hydrogen peroxide, ACS reagent, 30 wt% solution in water, nonstabilized, Thermo Scientific Chemicals

Pricing & Availability
Specifications

PubChem CID	784
CAS	7722-84-1
Molecular Weight (g/mol)	34.014
ChEBI	CHEBI:16240
MDL Number	MFCD00011333
SMILES	OO
Synonym	oxydol,perhydrol,superoxol,interox,hydrogen dioxide,inhibine,peroxaan,albone,hioxyl,kastone
IUPAC Name	hydrogen peroxide
InChI Key	MHAJPDPJQMAIIY-UHFFFAOYSA-N
Molecular Formula	H2O2

254

Nitrate Nitrogen Standard, 1000 ppm N (4427 ppm NO₃^-), Ricca Chemical

CAS: 7757-79-1 Molecular Formula: KNO3 Molecular Weight (g/mol): 101.10 MDL Number: MFCD00011409 InChI Key: FGIUAXJPYTZDNR-UHFFFAOYSA-N PubChem CID: 24434 ChEBI: CHEBI:63043 IUPAC Name: potassium nitrate SMILES: [K+].[O-][N+]([O-])=O

Pricing & Availability
Specifications

PubChem CID	24434
CAS	7757-79-1
Molecular Weight (g/mol)	101.10
ChEBI	CHEBI:63043
MDL Number	MFCD00011409
SMILES	[K+].[O-][N+]([O-])=O
IUPAC Name	potassium nitrate
InChI Key	FGIUAXJPYTZDNR-UHFFFAOYSA-N
Molecular Formula	KNO3

255

Thermo Scientific Chemicals Iodine, 0.01N Standardized Solution

CAS: 7553-56-2 | I2 | 253.81 g/mol

Pricing & Availability
Specifications

Molecular Weight (g/mol)	253.81
ChEBI	CHEBI:17606
Solubility	Miscible with chloroform, carbon tetrachloride, carbon disulfide, cyclohexane, methanol, ethyl acetate, toluene, benzene, n-hexane, butan-2-ol, bromoethane, n-heptane, glycerol and diethyl ether
Color	Red to Brown
Physical Form	Liquid
Chemical Name or Material	Iodine
SMILES	II
InChI Key	PNDPGZBMCMUPRI-UHFFFAOYSA-N
Vapor Pressure	23 hPa (17mm Hg) at 20°C
PubChem CID	807
Concentration or Composition (by Analyte or Components)	Iodine: 0.13%; Potassium iodide: 2.5%; Water: 97.37%
CAS	7732-18-5
MDL Number	MFCD00011355 MFCD00164163
TSCA	Yes
Recommended Storage	Ambient temperatures
Molecular Formula	I2
EINECS Number	231-442-4
Formula Weight	253.81

Buffers and Standards

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ChromaCare™ LC-MS Instrument Flush Solution Greener ChoiceOffers one or more environmental benefits itemized in the U.S. FTC “Green Guides.”Learn More

Carbon Standard, (Potassium Hydrogen Phthalate), Certified, 1000ppm ±10ppm Organic (1mL = 1mg C) , LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Hydrogen peroxide, ACS reagent, 30 wt% solution in water, nonstabilized, Thermo Scientific Chemicals GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

ChromaCare™ LC-MS Instrument Flush Solution

Carbon Standard, (Potassium Hydrogen Phthalate), Certified, 1000ppm ±10ppm Organic (1mL = 1mg C) , LabChem™

Hydrogen peroxide, ACS reagent, 30 wt% solution in water, nonstabilized, Thermo Scientific Chemicals