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 (22,852)

Spectroscopy Standards (5,985)

General Chemistry Solutions (5,252)

Matrix Blanks and Standardization Solutions (4,375)

Life Science Buffers (3,923)

Electrochemistry Buffers (2,320)

Environmental Testing Standards (1,933)

Electrochemistry Standards (1,218)

Karl Fischer Buffers and Reagents (481)

Isotope Standards (319)

Viscosity Standards (258)

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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Available on GSA/VA Contract (381)
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Production Products (37)
Science Education (219)
Small and Specialty Supplier (18,734)

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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481 – 495 of 43,777 results

481

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

482

Buffer solution, pH 7.00 (+/-0.024 @ 25oC), Colored Yellow, 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	MFCD00146252
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

483

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

484

Water Hardness Buffer, with Magnesium, Certified, LabChem™

Pricing & Availability
Specifications

Linear Formula	NH₄OH
Color	Colorless
Physical Form	Liquid
UN Number	UN2672
Chemical Name or Material	Water Hardness Buffer
Grade	Certified
Identification	Passes Test
Density	0.96g/mL
Name Note	with Magnesium
CAS	14402-88-1
Health Hazard 3	GHS P Statement Do not breathe vapors, mist, spray. Wear protective gloves, protective clothing, eye protection, face protection. Wash exposed skin thoroughly after handling. Avoid release to the environment. If swallowed: Rinse mouth. Do not induce vomiting. Immediately call a poison center/doctor. If on skin (or air): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. Immediately call a poison center/doctor. Wash contaminated clothing before reuse. If inhaled: Remove person to fresh air and keep comfortable for breathing. Immediately call a poison center/doctor. 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/doctor. Store locked up. Dispose of contents/container to comply with local, state and federal regulations.
Decomposition Information	Fume; Carbon monoxide; Carbon dioxide; Thermal decomposition generates: Corrosive vapors
Health Hazard 2	GHS H Statement Causes severe skin burns and eye damage. Toxic to aquatic life.
Solubility Information	Soluble in water
Packaging	Poly Bottle
Health Hazard 1	Danger
Recommended Storage	Room Temperature
Formula Weight	35.05
Specific Gravity	0.96g/mL
CAS Max %	0.5

485

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

486

LabChem, Inc. Buffer Solution pH 4.0 at 25°C, Color Coded Red, Certified, LabChem™

Pricing & Availability
Specifications

Linear Formula	KHC₈H₄O₄
Color	Red
Traceability to NIST	Traceable to NIST
Physical Form	Liquid
Chemical Name or Material	Buffer Solution pH 4.0 at 25°C
Grade	Certified
Identification	Passes Test
Density	1g/mL
Name Note	Color Coded Red
CAS	67-56-1
Health Hazard 3	GHS P Statement If in contact with skin or eyes, rinse thoroughly with water for 15-20 minutes. If swallowed, get medical attention.
Decomposition Information	Formaldehyde; Carbon monoxide; Carbon dioxide
Health Hazard 2	GHS H Statement Solution is not hazardous.
Solubility Information	Soluble in water
pH	4.00 to 4.01
Recommended Storage	Room Temperature
Formula Weight	204.23
Specific Gravity	1g/mL
CAS Max %	0.005

487

Tris(hydroxymethyl)aminomethane, 99.8%, ACS reagent

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

488

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

489

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

490

Ricca Chemical Company Bromate-Bromide Solution, 0.0250 N (N/40), Ricca Chemical

Pricing & Availability
Specifications

Concentration or Composition Notes	0.0250Normal
CAS	7758-01-2
Color	Colorless
Physical Form	Liquid
Packaging	Amber Glass Bottle
CAS Min %	0.07
Chemical Name or Material	Bromate-Bromide Solution
Grade	Laboratory
Synonym	dihydrogen oxide,dihydrogen monoxide
CAS Max %	0.07

491

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

Pricing & Availability

492

Linear Formula	KHC₈H₄O₄
CAS	7447-40-7
Health Hazard 3	GHS P Statement If in contact with skin or eyes, rinse thoroughly with water for 15-20 minutes. If swallowed, get medical attention.
Health Hazard 2	GHS H Statement Solution is not hazardous.
Physical Form	Liquid
Packaging	Poly Bottle
Chemical Name or Material	Electrode Storage Solution
Recommended Storage	Room Temperature
Formula Weight	204.23
CAS Max %	0.6

493

Buffer solution pH 7, Phosphate buffer, traceable to NIST, ready to use

CAS: 7558-79-4

Pricing & Availability
Specifications

Name Note	Phosphate buffer, traceable to NIST, ready to use
CAS	7647-14-5
MDL Number	MFCD03097944
Solubility Information	Solubility in water: miscible.
Chemical Name or Material	Buffer solution pH 7
Density	1.0000g/mL
Specific Gravity	1

494

Ricca Chemical Company VeriSpec™ Multi-Element Environmental Standard 26, Ricca Chemical

100 ppm: Ag, Al, As, Ba, Be, Ca, Cd, Co, Cr, Cu, Fe, K, Mg, Mn, Mo, Na, Ni, Pb, Sb, Se, Sn, Sr, Ti,

Pricing & Availability

495

Methylmagnesium chloride, 3M (22 wt.%) solution in THF, AcroSeal™

CAS: 676-58-4 Molecular Formula: CH3ClMg Molecular Weight (g/mol): 74.79 MDL Number: MFCD00000468 InChI Key: RQNMYNYHBQQZSP-UHFFFAOYSA-M Synonym: methylmagnesium chloride,chloromethylmagnesium,chloro methyl magnesium,magnesium, chloromethyl,memgcl,methylmagnesiumchloride,methyl magnesium chloride,unii-m5e1132g4w,ch3mgcl,qmabhcaih@ PubChem CID: 12670 IUPAC Name: chloro(methyl)magnesium SMILES: C[Mg]Cl

Pricing & Availability
Specifications

PubChem CID	12670
CAS	676-58-4
Molecular Weight (g/mol)	74.79
MDL Number	MFCD00000468
SMILES	C[Mg]Cl
Synonym	methylmagnesium chloride,chloromethylmagnesium,chloro methyl magnesium,magnesium, chloromethyl,memgcl,methylmagnesiumchloride,methyl magnesium chloride,unii-m5e1132g4w,ch3mgcl,qmabhcaih@
IUPAC Name	chloro(methyl)magnesium
InChI Key	RQNMYNYHBQQZSP-UHFFFAOYSA-M
Molecular Formula	CH3ClMg

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Buffers and Standards

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LabChem, Inc. Buffer Solution pH 4.0 at 25°C, Color Coded Red, Certified, LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.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 Bromate-Bromide Solution, 0.0250 N (N/40), Ricca Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.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

Ricca Chemical Company VeriSpec™ Multi-Element Environmental Standard 26, Ricca Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

LabChem, Inc. Buffer Solution pH 4.0 at 25°C, Color Coded Red, Certified, LabChem™

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

Ricca Chemical Company Bromate-Bromide Solution, 0.0250 N (N/40), Ricca Chemical

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

Ricca Chemical Company VeriSpec™ Multi-Element Environmental Standard 26, Ricca Chemical