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 (22,850)

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Life Science Buffers (3,921)

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Quality Control and Proficiency Samples (205)

Kjeldahl Buffers and Reagents (108)

Gel Filtration Standards (60)

Matrix Modifiers (29)

Osmolality Standards (12)

Smoke Point Reference (9)

Polarimetric Standards (4)

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Grade

AAS (56)
AAS Standard (11)
ACS (59)
ACS Reagent (26)
ACS/ASTM E 200/AOAC/EPA (7)
ACS/ASTM E 200/AOAC/USP Volumetric (5)
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 (1)
>11.5 (3)
>12 (44)
>13 (104)
>8 (1)
<0.5 (3)

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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)
Crystalline (17)
Crystalline Powder (143)

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Technique

AA (472)
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 (432)
Buffer, Storage (2)
Calibration (8)
Cleaning (1)
Colored pH Buffer (35)

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451 – 465 of 43,773 results

451

Nitrate-Nitrogen Standard for Ion Chromatography, SPEX CertiPrep™

CAS: 7732-18-5

Pricing & Availability
Specifications

CAS	7732-18-5

452

CAS	7732-18-5
Color	Colorless
Packaging	Plastic bottle
Physical Form	Liquid
pH	9.98 to 10.02 (20°C)
Health Hazard 1
Chemical Name or Material	Buffer solution pH 10

453

Thermo Scientific Chemicals MOPS, 99%, for biochemistry

CAS: 1132-61-2 Molecular Formula: C7H15NO4S Molecular Weight (g/mol): 209.26 MDL Number: MFCD00006183 InChI Key: DVLFYONBTKHTER-UHFFFAOYSA-N Synonym: 3-(N-Morpholino)propanesulfonic acid PubChem CID: 70807 ChEBI: CHEBI:44115 SMILES: [O-]S(=O)(=O)CCC[NH+]1CCOCC1

Pricing & Availability
Specifications

PubChem CID	70807
CAS	1132-61-2
Molecular Weight (g/mol)	209.26
ChEBI	CHEBI:44115
MDL Number	MFCD00006183
SMILES	[O-]S(=O)(=O)CCC[NH+]1CCOCC1
Synonym	3-(N-Morpholino)propanesulfonic acid
InChI Key	DVLFYONBTKHTER-UHFFFAOYSA-N
Molecular Formula	C7H15NO4S

454

Buffer solution pH 7, Phosphate buffer

CAS: 7558-79-4 | H₂KO₄P

Pricing & Availability
Specifications

CAS	7732-18-5
MDL Number	MFCD03097944
Packaging	Plastic bottle
Chemical Name or Material	Buffer solution pH 7
Merck Index	14, 7659
Molecular Formula	H₂KO₄P
Formula Weight	136.09
Vapor Pressure	14mmHg at 20°C

455

Ricca Chemical Company Mercurous Nitrate TS, Ricca Chemical

CAS: 7732-18-5 Synonym: dihydrogen oxide,dihydrogen monoxide

Pricing & Availability
Specifications

CAS	7732-18-5
Synonym	dihydrogen oxide,dihydrogen monoxide

456

Sodium hydroxide, 0.05N Standardized Solution

CAS: 1310-73-2 Molecular Formula: HNaO Molecular Weight (g/mol): 39.997 MDL Number: MFCD00003548 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
MDL Number	MFCD00003548
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

457

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

458

Buffer solution, pH 8.00 (+/-0.024 @ 25oC), No Color, Specpure, NIST Traceable

CAS: 1310-73-2

Pricing & Availability
Specifications

Concentration or Composition (by Analyte or Components)	Sodium hydroxide: 0.7%; Potassium dihydrogen phosphate: 0.7%; Water: 98.6%
CAS	7732-18-5
MDL Number	MFCD00134130
Color	Yellow
Solubility Information	Miscible with water.
Physical Form	Liquid
Chemical Name or Material	Buffer solution
TSCA	Yes
Recommended Storage	Ambient temperatures
Vapor Pressure	23 hPa (17mm Hg) at 20°C

459

PIPES, 98%

CAS: 5625-37-6 Molecular Formula: C8H18N2O6S2 Molecular Weight (g/mol): 302.36 MDL Number: MFCD00006159 InChI Key: IHPYMWDTONKSCO-UHFFFAOYSA-N Synonym: pipes,1,4-piperazinediethanesulfonic acid,piperazine-n,n'-bis 2-ethanesulfonic acid,2,2'-piperazine-1,4-diyl diethanesulfonic acid,1,4-piperazinebis ethanesulfonic acid,unii-g502h79v6l,2-4-2-sulfoethyl piperazin-1-yl ethanesulfonic acid,piperazine-1,4-bis 2-ethanesulfonic acid,1,4-piperazine-diethanesulfonic acid,2,2'-piperazine-1,4-diyl bis ethanesulphonic acid PubChem CID: 79723 ChEBI: CHEBI:44933 IUPAC Name: 2-[4-(2-sulfoethyl)piperazin-1-yl]ethanesulfonic acid SMILES: C1CN(CCN1CCS(=O)(=O)O)CCS(=O)(=O)O

Pricing & Availability
Specifications

PubChem CID	79723
CAS	5625-37-6
Molecular Weight (g/mol)	302.36
ChEBI	CHEBI:44933
MDL Number	MFCD00006159
SMILES	C1CN(CCN1CCS(=O)(=O)O)CCS(=O)(=O)O
Synonym	pipes,1,4-piperazinediethanesulfonic acid,piperazine-n,n'-bis 2-ethanesulfonic acid,2,2'-piperazine-1,4-diyl diethanesulfonic acid,1,4-piperazinebis ethanesulfonic acid,unii-g502h79v6l,2-4-2-sulfoethyl piperazin-1-yl ethanesulfonic acid,piperazine-1,4-bis 2-ethanesulfonic acid,1,4-piperazine-diethanesulfonic acid,2,2'-piperazine-1,4-diyl bis ethanesulphonic acid
IUPAC Name	2-[4-(2-sulfoethyl)piperazin-1-yl]ethanesulfonic acid
InChI Key	IHPYMWDTONKSCO-UHFFFAOYSA-N
Molecular Formula	C8H18N2O6S2

460

Sulfuric acid, 1.0N Standardized Solution

CAS: 7664-93-9 Molecular Formula: H2O4S Molecular Weight (g/mol): 98.07 MDL Number: MFCD00064589 InChI Key: QAOWNCQODCNURD-UHFFFAOYSA-N PubChem CID: 1118 ChEBI: CHEBI:26836 IUPAC Name: sulfuric acid SMILES: OS(O)(=O)=O

Pricing & Availability
Specifications

PubChem CID	1118
CAS	7664-93-9
Molecular Weight (g/mol)	98.07
ChEBI	CHEBI:26836
MDL Number	MFCD00064589
SMILES	OS(O)(=O)=O
IUPAC Name	sulfuric acid
InChI Key	QAOWNCQODCNURD-UHFFFAOYSA-N
Molecular Formula	H2O4S

461

LabChem, Inc. COD Standard, 1000ppm (1mL = 1mg COD) (Potassium Acid Phthalate in Water), Certified, 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

462

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

463

Ricca Chemical Company EP Reference Solution Y₄, Yellow Reference Solution, Ricca Chemical

Pricing & Availability

464

Borane-tetrahydrofuran complex, 1M solution in THF, Stabilized, AcroSeal™

CAS: 14044-65-6 | C4H11BO | 85.94 g/mol

Pricing & Availability
Specifications

Molecular Weight (g/mol)	85.94
InChI Key	RMCYTHFAWCWRFA-UHFFFAOYSA-N
Density	0.8760g/mL
Treatment(s)	Stabilized
PubChem CID	11062302
Name Note	1M solution in tetrahydrofuran, stabilized
Fieser	01,199; 02,106; 03,76; 04,124; 05,184; 06,161; 07,89; 12,65; 17,101
Formula Weight	85.94
Color	Colorless
Physical Form	Liquid
Chemical Name or Material	Borane-tetrahydrofuran complex
SMILES	B.C1CCOC1
Merck Index	15, 1336
Concentration	0.96 to 1.08M
CAS	109-99-9
Health Hazard 3	GHS P Statement Keep away from heat/sparks/open flames/hot surfaces. - No smoking. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower. Handle under inert gas. Protect from moisture. Wear protective gloves/protective clothing/eye protection/face protection. 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. Immediately call a POISON CENTER or doctor/physician.
MDL Number	MFCD00012429
Health Hazard 2	GHS H Statement May cause respiratory irritation. Causes serious eye damage. In contact with water releases flammable gases which may ignite spontaneously. Causes skin irritation. Harmful if swallowed. Highly flammable liquid and vapour. Suspected of causing cancer. Reacts violently with water. May form explosive peroxides. May cause drowsiness or dizziness.
Flash Point	−22°C
Packaging	AcroSeal™ Glass bottle
Solubility Information	Solubility in water: reacts.
Health Hazard 1	Danger
Synonym	borane-tetrahydrofuran complex,tetrahydrofuran borane,bh3.thf,borane tetrahydrofuran complex solution,borane-d3-thf complex solution,borane-tetrahydrofuran,unii-5ear4err1l,oxolane borane,boron; oxolane,borane thf
TSCA	TSCA
IUPAC Name	oxolane borane
Molecular Formula	C4H11BO
EINECS Number	237-881-8
Specific Gravity	0.876

465

LabChem, Inc. Chemical Solution, Buffer Solution pH 10.0 at 25°C, Color Coded Blue, Traceable to NIST, LabChem

This Chemical Solution, Buffer Solution has a pH of 10.0 at 25°C, is Color Coded Blue, and is Traceable to NIST.

Pricing & Availability
Specifications

CAS	144-55-8
Traceability to NIST	Yes
Physical Form	Aqueous Solution
Solution Type	Buffer

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Buffers and Standards

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Nitrate-Nitrogen Standard for Ion Chromatography, SPEX CertiPrep™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Ricca Chemical Company Mercurous Nitrate TS, Ricca Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

LabChem, Inc. COD Standard, 1000ppm (1mL = 1mg COD) (Potassium Acid Phthalate in Water), Certified, LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Ricca Chemical Company EP Reference Solution Y4, Yellow Reference Solution, Ricca Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Nitrate-Nitrogen Standard for Ion Chromatography, SPEX CertiPrep™

Ricca Chemical Company Mercurous Nitrate TS, Ricca Chemical

LabChem, Inc. COD Standard, 1000ppm (1mL = 1mg COD) (Potassium Acid Phthalate in Water), Certified, LabChem™

Ricca Chemical Company EP Reference Solution Y₄, Yellow Reference Solution, Ricca Chemical