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 (23,986)

Spectroscopy Standards (5,622)

General Chemistry Solutions (5,038)

Matrix Blanks and Standardization Solutions (4,259)

Life Science Buffers (4,141)

Electrochemistry Buffers (2,348)

Environmental Testing Standards (1,845)

Electrochemistry Standards (1,237)

Karl Fischer Buffers and Reagents (470)

Isotope Standards (377)

Viscosity Standards (253)

Quality Control and Proficiency Samples (180)

Kjeldahl Buffers and Reagents (90)

Gel Filtration Standards (57)

Matrix Modifiers (29)

Osmolality Standards (12)

Smoke Point Reference (9)

Polarimetric Standards (6)

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Available on GSA/VA Contract (381)
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Greener Choice (95)
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Small and Specialty Supplier (7,030)

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

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76 – 90 of 44,339 results

Gibco™ Sodium Hydroxide (NaOH) Solutions, 0.1–1.0 M

Gibco NaOH solutions offer more options for supply security and dual sourcing of the highest volume process liquid in bioprocessing manufacturing.

Pricing & Availability
Specifications

Boiling Point	100°C
Percent Purity	95 to 100%
CAS	1310-73-2
Color	Clear
Packaging	Bioprocess Container
pH	≥12 to ≤14
Chemical Name or Material	Sodium Hydroxide
Grade	Compendial
Synonym	Caustic soda, Acidity regulatory, Lye or Soda lye
Shelf Life	12 months
Melting Point	0°C

Thermo Scientific Chemicals TRIS, 1.0M buffer soln., pH 7.4

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

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

Buffer, Reference Standard, pH 7.00 ± 0.01 at 25°C, Ricca Chemical

Pricing & Availability
Specifications

Name Note	pH 7.00 ± 0.01 at 25 deg C
CAS	7732-18-5
For Use With (Equipment)	pH Meter and Electrode
Physical Form	Liquid
pH	7
CAS Min %	0.48
Chemical Name or Material	Buffer, Reference Standard
Concentration	1X
For Use With (Application)	Calibration
Solution Type	pH Buffer
CAS Max %	0.5

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Karl Fischer Aqualine™ Complete 5, for Karl Fischer Titration By Volumetry, Fisher Chemical™

Single-component reagent; Pyridine free

Pricing & Availability
Specifications

Name Note	Karl Fischer Reagent
CAS	7553-09-5
Health Hazard 3	Emergency Overview Causes burns by all exposure routes. Harmful by inhalation. Possible risk of harm to the unborn child. NFPA Health:
Health Hazard 2	DANGER!
Color	Brown
Physical Form	Liquid
Health Hazard 1	Signal Word: DANGER!
Chemical Name or Material	Aqualine™ Complete 5
Cleanup Symbol	Solvent
ChemAlert Storage Symbol	Gray

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Tris Hydrochloride, 1M Solution (pH 7.0/Mol. Biol.), Fisher BioReagents™

CAS: 77-86-1 Molecular Formula: C4H11NO3 Molecular Weight (g/mol): 121.136 InChI Key: LENZDBCJOHFCAS-UHFFFAOYSA-N Synonym: Tris-HCl 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
SMILES	C(C(CO)(CO)N)O
Synonym	Tris-HCl
IUPAC Name	2-amino-2-(hydroxymethyl)propane-1,3-diol
InChI Key	LENZDBCJOHFCAS-UHFFFAOYSA-N
Molecular Formula	C4H11NO3

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TBS, Tris Buffered Saline, 10X Solution, pH 7.4, Molecular Biology, Fisher BioReagents™

CAS: 7447-40-7

Pricing & Availability
Specifications

Boiling Point	100°C
Color	Colorless
Physical Form	Liquid
Chemical Name or Material	Tris Buffered Saline
Grade	Molecular Biology
DNase	DNase free
ChemAlert Storage Symbol	Gray
Name Note	10X Solution
Concentration or Composition (by Analyte or Components)	10X solution contains 1.37M Sodium Chloride, 0.027M Potassium Chloride, and 0.25M Tris/Tris-HCl.
CAS	7732-18-5
Protease	Protease free
pH	7.5
Synonym	TBS
Purity Grade Notes	DNase-, RNase- and Protease-Free
Recommended Storage	RT

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Buffer Concentrate, pH 7.00 (Certified), Fisher Chemical™

Pricing & Availability
Specifications

CAS	7664-38-2
Molecular Weight (g/mol)	380.17
MDL Number	MFCD00146206
Traceability to NIST	Traceable to NIST.
Packaging	Poly Bottle
Physical Form	Liquid
Chemical Name or Material	Buffer Concentrate, pH 7.00
Grade	Certified
Identification	Pass Test
InChI Key	UEUXEKPTXMALOB-UHFFFAOYSA-J
Molecular Formula	C10H12N2Na4O8
ChemAlert Storage Symbol	Gray

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Bromine Water (Saturated at 20°C/Reagent), Fisher Chemical

CAS: 7726-95-6 Molecular Formula: Br Molecular Weight (g/mol): 79.91 MDL Number: MFCD00010896 InChI Key: CPELXLSAUQHCOX-UHFFFAOYSA-M Synonym: bromine,dibromine,brom,bromine solution,brome,bromo,broom,bromine water,bromo italian,bromo spanish PubChem CID: 24408 ChEBI: CHEBI:29224 IUPAC Name: bromide SMILES: [Br-]

Pricing & Availability
Specifications

PubChem CID	24408
CAS	7726-95-6
Molecular Weight (g/mol)	79.91
ChEBI	CHEBI:29224
MDL Number	MFCD00010896
SMILES	[Br-]
Synonym	bromine,dibromine,brom,bromine solution,brome,bromo,broom,bromine water,bromo italian,bromo spanish
IUPAC Name	bromide
InChI Key	CPELXLSAUQHCOX-UHFFFAOYSA-M
Molecular Formula	Br

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MOPS (Fine White Crystals/Molecular Biology), Fisher BioReagents™

CAS: 1132-61-2 Molecular Formula: C7H15NO4S Molecular Weight (g/mol): 209.26 MDL Number: MFCD00006183 InChI Key: DVLFYONBTKHTER-UHFFFAOYSA-N Synonym: 3-(4-Morpholino)propane sulfonic acid PubChem CID: 70807 ChEBI: CHEBI:44115 IUPAC Name: 3-morpholin-4-ylpropane-1-sulfonic acid 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-(4-Morpholino)propane sulfonic acid
IUPAC Name	3-morpholin-4-ylpropane-1-sulfonic acid
InChI Key	DVLFYONBTKHTER-UHFFFAOYSA-N
Molecular Formula	C7H15NO4S

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Tris(hydroxymethyl)aminomethane (Cryst./Certified ACS), Fisher Chemical™

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,Trimethylol Aminomethane,Tris Buffer,Tris,Trizma™,THAM,Tris base,Tris(hydroxymethyl)aminomethane,Trometamol 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,Trimethylol Aminomethane,Tris Buffer,Tris,Trizma™,THAM,Tris base,Tris(hydroxymethyl)aminomethane,Trometamol
IUPAC Name	2-amino-2-(hydroxymethyl)propane-1,3-diol
InChI Key	LENZDBCJOHFCAS-UHFFFAOYSA-N
Molecular Formula	C4H11NO3

accumet™ pH 12.46 Buffer, Fisherbrand™

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accumet™ TISAB II for Fluoride Electrode, Fisherbrand™

Pricing & Availability
Specifications

Description	TISAB II for Fluoride Electrode
For Use With (Equipment)	Ion Selective Electrode
Packaging	Gallon
Chemical Name or Material	Ion Selective Electrode Reagents
For Use With (Application)	Ionic strength adjustors used for analysis with ion selective electrodes and special reagents used with some ion selective electrodes
Solution Type	Ionic Strength Adjustor

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Karl Fischer Aqualine™ Matrix K, for Karl Fischer Titration By Volumetry, Fisher Chemical™

Pricing & Availability
Specifications

MDL Number	81734
Color	Colorless
Packaging	Amber glass bottle
Physical Form	Liquid

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HEPES Sodium Salt (White Powder), Fisher BioReagents

CAS: 75277-39-3 Molecular Formula: C8H17N2NaO4S Molecular Weight (g/mol): 260.28 MDL Number: MFCD00036463 InChI Key: RDZTWEVXRGYCFV-UHFFFAOYSA-M 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
IUPAC Name	sodium 2-[4-(2-hydroxyethyl)piperazin-1-yl]ethane-1-sulfonate
InChI Key	RDZTWEVXRGYCFV-UHFFFAOYSA-M
Molecular Formula	C8H17N2NaO4S

Buffers and Standards

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Gibco™ Sodium Hydroxide (NaOH) Solutions, 0.1–1.0 M Greener ChoiceOffers one or more environmental benefits itemized in the U.S. FTC “Green Guides.”Learn More

TBS, Tris Buffered Saline, 10X Solution, pH 7.4, Molecular Biology, Fisher BioReagents™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Gibco™ Sodium Hydroxide (NaOH) Solutions, 0.1–1.0 M

TBS, Tris Buffered Saline, 10X Solution, pH 7.4, Molecular Biology, Fisher BioReagents™