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 (24,175)

Spectroscopy Standards (5,643)

General Chemistry Solutions (5,062)

Matrix Blanks and Standardization Solutions (4,295)

Life Science Buffers (4,179)

Electrochemistry Buffers (2,347)

Environmental Testing Standards (1,857)

Electrochemistry Standards (1,241)

Karl Fischer Buffers and Reagents (473)

Isotope Standards (387)

Viscosity Standards (259)

Quality Control and Proficiency Samples (183)

Kjeldahl Buffers and Reagents (90)

Gel Filtration Standards (58)

Matrix Modifiers (29)

Osmolality Standards (12)

Smoke Point Reference (10)

Polarimetric Standards (6)

Narrow Results

special offers

Clearance (3)
New Lab Start-Up (816)
Offers (26)

special interests

Available on GSA/VA Contract (381)
SureTRACE (78)
Fast Shipping (665)
Greener Choice (90)
Production Products (187)
Science Education (212)
Small and Specialty Supplier (18,500)

Grade

AAS (55)
AAS Standard (11)
ACS (55)
ACS Reagent (25)
ACS/ASTM E 200/AOAC/EPA (7)
ACS/ASTM E 200/AOAC/USP Volumetric (5)
APHA/EPA (5)

Show all

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)

Show all

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)

Show all

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)

Show all

pH

≥12 to ≤14 (6)
>11.5 (1)
>12 (44)
>13 (97)
>8 (1)
<0.5 (3)
<1 (98)

Show all

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)

Show all

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)

Show all

Physical Form

Aqueous Solution (30)
Capsule (11)
Chemvelope (1)
Clear Liquid (1)
Clear Liquid at 20°C (2)
Colorless Liquid (1)
Crystalline (17)

Show all

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)

Show all

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 (16)
Agarose Gel Electrophoresis, Polyacrylamide Gel Electrophoresis (1)

Show all

Search Within Results

931 – 945 of 44,681 results

931

Lithium standard solution, for AAS, 1 mg/ml Li in 2% HCl

CAS: 7439-93-2 | Li | 6.94 g/mol

Pricing & Availability
Specifications

Molecular Weight (g/mol)	6.94
ChEBI	CHEBI:30145
Physical Form	Solution
Chemical Name or Material	Lithium standard solution
Grade	AAS
SMILES	[Li]
Concentration	995 to 1005 μg/mL of Li (1+) in 2% HCl (20°C)
InChI Key	WHXSMMKQMYFTQS-UHFFFAOYSA-N
Density	0.53
PubChem CID	3028194
Name Note	1 mg/ml Li in 2% HCl
CAS	7732-18-5
Health Hazard 3	GHS P Statement: Keep only in original container. Absorb spillage to prevent material damage. 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	MFCD00134051
Health Hazard 2	GHS H Statement: May be corrosive to metals.
Health Hazard 1	Warning
Packaging	Plastic bottle
IUPAC Name	lithium
Molecular Formula	Li
Formula Weight	6.94

932

Nitrate (as Nitrogen) Standard, 1000ppm, Preserved with Chloroform (1mL = 1mg N, 1mL = 4.43mg NO₃^-), Certified, LabChem™

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

933

Sodium phosphate, 0.2M buffer soln., pH 9.0, Thermo Scientific™

Pricing & Availability
Specifications

MDL Number	MFCD00146206
Physical Form	Liquid
pH	9.0
Chemical Name or Material	Sodium phosphate buffer soln.
TSCA	Yes
Recommended Storage	Ambient temperatures
Concentration	0.2 M

934

Tetramethylammonium hydroxide, 25 wt% in methanol

CAS: 75-59-2 | C4H13NO | 91.154 g/mol

Pricing & Availability
Specifications

Boiling Point	65.0°C
Linear Formula	(CH₃)₄NOH
Molecular Weight (g/mol)	91.154
Chemical Name or Material	Tetramethylammonium hydroxide
SMILES	C[N+](C)(C)C.[OH-]
InChI Key	WGTYBPLFGIVFAS-UHFFFAOYSA-M
Density	0.9000g/mL
PubChem CID	60966
Name Note	25 wt. % in Methanol
CAS	67-56-1
Health Hazard 3	GHS P Statement: Wear protective gloves/protective clothing/eye protection/face protection. IF ON SKIN: Gently wash with plenty of soap and water. IF SWALLOWED: rinse mouth. Do NOT induce vomiting. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Call a POISON CENTER or doctor/physician if you feel unwell. 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	MFCD00008280
Health Hazard 2	GHS H Statement: Toxic in contact with skin. Toxic if swallowed. Toxic if inhaled. Causes severe skin burns and eye damage. Causes damage to organs. Highly flammable liquid and vapor.
Flash Point	6°C
Solubility Information	Solubility in water: soluble.
Health Hazard 1	Danger
Synonym	tetramethylammonium hydroxide,tmah,hydroxyde de tetramethylammonium,nmw-w,nmd 3,tetramethyl ammonium hydroxide,unii-5gkp7317q2,ammonium, tetramethyl-, hydroxide,methanaminium, n,n,n-trimethyl-, hydroxide,tetramethylammoniumhydroxide
TSCA	TSCA
RTECS Number	PA0875000
IUPAC Name	tetramethylazanium;hydroxide
Molecular Formula	C4H13NO
EINECS Number	200-882-9
Formula Weight	91.15
Specific Gravity	0.9
Melting Point	-98.0°C

935

Promotions Available

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

936

Chloride Standard, 50 ppm Cl^-, Ricca Chemical

CAS: 7732-18-5

Pricing & Availability
Specifications

CAS	7732-18-5

937

VeriSpec™ Mixed Anion Standard 7, Ricca Chemical

2 ppm F^-, 10 ppm PO₄³^-, NO₃^-, Br^-, SO₄²^-, 5ppm Cl^-, NO₂^- /nManufactured and Tested in a

Pricing & Availability

938

EP Reference Solution BY₆, Brownish-Yellow Reference Solution, Ricca Chemical

Pricing & Availability

939

Calcium, AAS standard solution, Specpure™ Ca 1000μg/mL

CAS: 471-34-1 Molecular Formula: CCaO3 Molecular Weight (g/mol): 100.09 MDL Number: MFCD00010906 InChI Key: VTYYLEPIZMXCLO-UHFFFAOYSA-L PubChem CID: 10112 ChEBI: CHEBI:3311 SMILES: [Ca++].[O-]C([O-])=O

Pricing & Availability
Specifications

PubChem CID	10112
CAS	471-34-1
Molecular Weight (g/mol)	100.09
ChEBI	CHEBI:3311
MDL Number	MFCD00010906
SMILES	[Ca++].[O-]C([O-])=O
InChI Key	VTYYLEPIZMXCLO-UHFFFAOYSA-L
Molecular Formula	CCaO3

940

Ammonium thioglycolate, 70 wt.% solution in water

Ammonium thioglycolate, 68.0 to 72.0%, C2H7NO2S, CAS Number-5421-46-5, 7732-18-5 | CAS: 5421-46-5 | C2H7NO2S | 109.143 g/mol

Pricing & Availability
Specifications

Molecular Weight (g/mol)	109.143
Identification	ammonium: positive, mercaptane: positive
InChI Key	ZZTCCAPMZLDHFM-UHFFFAOYSA-N
Density	1.2200g/mL
PubChem CID	21534
Name Note	70 wt.% solution in water
Percent Purity	68.0 to 72.0%
pH	5.8 to 6.4
Formula Weight	109.15
Melting Point	-20.0°C
Boiling Point	115.0°C
Color	Colorless
Physical Form	Solution
Chemical Name or Material	Ammonium thioglycolate
SMILES	C(C(=O)[O-])S.[NH4+]
CAS	7732-18-5
Health Hazard 3	GHS P Statement: Wear protective gloves/protective clothing/eye protection/face protection. IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. 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	MFCD00137451
Health Hazard 2	GHS H Statement: May cause an allergic skin reaction. Toxic if swallowed. May be corrosive to metals.
Packaging	Glass bottle
Solubility Information	Solubility in water: completely soluble.
Health Hazard 1	GHS Signal Word: Danger
Synonym	ammonium thioglycolate,ammonium mercaptoacetate,acetic acid, mercapto-, monoammonium salt,thiofaco a-50,ammonium thioglycollate,thioglycolic acid ammonium salt,usaf mo-2,unii-6p9e788vzz,thioglycollic acid, ammonium salt,ammonium 2-mercaptoacetate
IUPAC Name	azanium;2-sulfanylacetate
Molecular Formula	C2H7NO2S
Specific Gravity	1.22

941

Dimethylzinc, 1.2M solution in toluene, AcroSeal™

CAS: 544-97-8 | C2H6Zn | 95.45 g/mol

Pricing & Availability
Specifications

Linear Formula	Zn(CH₃)₂
Molecular Weight (g/mol)	95.45
Color	Clear colorless
Chemical Name or Material	Dimethylzinc
SMILES	[CH3-].[CH3-].[Zn+2]
Merck Index	15, 3289
Concentration	1.2M (based on Zn) exact strength on the certificate of analysis
InChI Key	JRPGMCRJPQJYPE-UHFFFAOYSA-N
Density	0.9300g/mL
PubChem CID	11010
Name Note	1.2M 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	MFCD00014854
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: vigorous reaction. Other solubilities: soluble in hydrocarbons
Health Hazard 1	Danger
Synonym	dimethylzinc,zinc, dimethyl,dimethyl zinc,methylzinc,unii-8h6r0n8w2f,ch3 2zn,znme2,zinc methyl,dimethylzink,hsdb 709
IUPAC Name	zinc;carbanide
Molecular Formula	C2H6Zn
Formula Weight	95.45
Specific Gravity	0.93

942

Thermo Scientific Chemicals Ionic strength adjuster solution for chloride or sulfide electrodes

Pricing & Availability

943

Promotions Available

Thermo Scientific Chemicals Phenol water saturated sol., for molecular biology, DNAse, RNAse, Protease free, stab., free of oxides

CAS: 108-95-2 Molecular Formula: C6H6O Molecular Weight (g/mol): 94.11 MDL Number: MFCD00002143 InChI Key: ISWSIDIOOBJBQZ-UHFFFAOYSA-N Synonym: carbolic acid,hydroxybenzene,phenic acid,phenylic acid,oxybenzene,benzenol,phenyl hydrate,monophenol,phenyl hydroxide,phenylic alcohol PubChem CID: 996 ChEBI: CHEBI:15882 IUPAC Name: phenol SMILES: OC1=CC=CC=C1

Pricing & Availability
Specifications

PubChem CID	996
CAS	108-95-2
Molecular Weight (g/mol)	94.11
ChEBI	CHEBI:15882
MDL Number	MFCD00002143
SMILES	OC1=CC=CC=C1
Synonym	carbolic acid,hydroxybenzene,phenic acid,phenylic acid,oxybenzene,benzenol,phenyl hydrate,monophenol,phenyl hydroxide,phenylic alcohol
IUPAC Name	phenol
InChI Key	ISWSIDIOOBJBQZ-UHFFFAOYSA-N
Molecular Formula	C6H6O

944

Tris, 99.8 to 100.1% (Dry Basis), Molecular Biology Grade, Ultrapure

CAS: 77-86-1 Molecular Formula: C4H11NO3 Molecular Weight (g/mol): 121.136 MDL Number: MFCD00004679 InChI Key: LENZDBCJOHFCAS-UHFFFAOYSA-N Synonym: Tris(hydroxymethyl)amino methane 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
Synonym	Tris(hydroxymethyl)amino methane
IUPAC Name	2-amino-2-(hydroxymethyl)propane-1,3-diol
InChI Key	LENZDBCJOHFCAS-UHFFFAOYSA-N
Molecular Formula	C4H11NO3

945

Buffer Solution for Strong Acids, ≤ 200 ppm, MilliporeSigma™

Buffer solution for strong acids for Karl Fischer Titration Aquastar™.

Pricing & Availability

Prev
1
...
61
62
63
64
...
2,979
Next

Buffers and Standards

Filtered Search Results

Narrow Results