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 (24,150)

Spectroscopy Standards (5,640)

General Chemistry Solutions (5,062)

Matrix Blanks and Standardization Solutions (4,283)

Life Science Buffers (4,168)

Electrochemistry Buffers (2,348)

Environmental Testing Standards (1,849)

Electrochemistry Standards (1,241)

Karl Fischer Buffers and Reagents (473)

Isotope Standards (387)

Viscosity Standards (260)

Quality Control and Proficiency Samples (183)

Kjeldahl Buffers and Reagents (90)

Gel Filtration Standards (58)

Matrix Modifiers (29)

Osmolality Standards (12)

Smoke Point Reference (9)

Polarimetric Standards (6)

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Available on GSA/VA Contract (381)
SureTRACE (78)
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Greener Choice (89)
Production Products (187)
Science Education (212)
Small and Specialty Supplier (18,497)

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)

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

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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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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)

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Search Within Results

76 – 90 of 44,631 results

Potassium Chloride Conductivity Standard, 100 μS/cm at 25°C, Ricca Chemical

CAS: 7447-40-7 Molecular Formula: ClK Molecular Weight (g/mol): 74.55 MDL Number: MFCD00011360 InChI Key: WCUXLLCKKVVCTQ-UHFFFAOYSA-M PubChem CID: 4873 ChEBI: CHEBI:32588 IUPAC Name: potassium chloride SMILES: [Cl-].[K+]

Pricing & Availability
Specifications

PubChem CID	4873
CAS	7447-40-7
Molecular Weight (g/mol)	74.55
ChEBI	CHEBI:32588
MDL Number	MFCD00011360
SMILES	[Cl-].[K+]
IUPAC Name	potassium chloride
InChI Key	WCUXLLCKKVVCTQ-UHFFFAOYSA-M
Molecular Formula	ClK

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

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

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

Color Standard, APHA/Hazen (Platinum-Cobalt), Color = 500, Ricca Chemical

Pricing & Availability
Specifications

Name Note	Color= 500
CAS	7732-18-5
CAS Min %	0.09
Packaging	Amber Glass Bottle
Chemical Name or Material	Color Standard
Grade	APHA/Hazen
Melting Point	Approximately 0°C
CAS Max %	0.09

Invitrogen™ TBE (10X), RNase-free

Molecular biology grade, Invitrogen 10X TBE solution is supplied in four bottles containing 1 L each. The buffer is certified RNase-free, economical, and ready-to-use.

Pricing & Availability
Specifications

Chemical Name or Material	Running Buffer
Grade	Molecular Biology
Recommended Storage	Store at room temperature.
Concentration	10X
Product Line	Ambion

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

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

Thermo Scientific Chemicals TRIS-buffered saline (TBS, 10X) pH 7.4

CAS: 77-86-1 Molecular Formula: C4H11NO3 Molecular Weight (g/mol): 121.136 MDL Number: MFCD00132476 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	MFCD00132476
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

Sodium Thiosulfate, 0.100 N (N/10), Ricca Chemical

CAS: 10102-17-7 Molecular Formula: H10Na2O8S2 InChI Key: PODWXQQNRWNDGD-UHFFFAOYSA-L Synonym: sodium thiosulfate pentahydrate,ametox,sodium thiosulfate, pentahydrate,antichlor,tinver,disodium thiosulfate pentahydrate,unii-hx1032v43m,ccris 3952,thiosulfuric acid, disodium salt, pentahydrate,sodium hyposulfite pentahydrate PubChem CID: 61475 ChEBI: CHEBI:32150

Pricing & Availability
Specifications

PubChem CID	61475
CAS	10102-17-7
ChEBI	CHEBI:32150
Synonym	sodium thiosulfate pentahydrate,ametox,sodium thiosulfate, pentahydrate,antichlor,tinver,disodium thiosulfate pentahydrate,unii-hx1032v43m,ccris 3952,thiosulfuric acid, disodium salt, pentahydrate,sodium hyposulfite pentahydrate
InChI Key	PODWXQQNRWNDGD-UHFFFAOYSA-L
Molecular Formula	H10Na2O8S2

Sodium Hydroxide, 0.250 N (N/4), Ricca Chemical

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

Potassium Chloride Conductivity Standard, 718 μS/cm at 25°C, Ricca Chemical

Pricing & Availability
Specifications

PubChem CID	4873
CAS	7447-40-7
Molecular Weight (g/mol)	74.55
ChEBI	CHEBI:32588
MDL Number	MFCD00011360
SMILES	[Cl-].[K+]
IUPAC Name	potassium chloride
InChI Key	WCUXLLCKKVVCTQ-UHFFFAOYSA-M
Molecular Formula	ClK

Water Hardness Buffer, Odorless, Ricca Chemical

Pricing & Availability
Specifications

Name Note	Odorless
CAS	7791-18-6
Color	Colorless to Yellow
Packaging	Natural Poly Bottle
Physical Form	Liquid
CAS Min %	0.18
Chemical Name or Material	Water Hardness Buffer
Grade	Laboratory
Concentration	1X
For Use With (Application)	Water Analysis
Solution Type	Buffer
CAS Max %	0.19

Calcium Carbonate Standard , (1mL = 1mg CaCO₃ = 0.4mg Ca), for Hardness, Certified, 1.000 ±0.010mg CaCO₃/mL, LabChem™

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 IUPAC Name: calcium carbonate 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
IUPAC Name	calcium carbonate
InChI Key	VTYYLEPIZMXCLO-UHFFFAOYSA-L
Molecular Formula	CCaO3

Buffer Solution pH 7.0 at 25°C, Certified, LabChem™

Pricing & Availability
Specifications

Linear Formula	KH₂PO₄
Color	Colorless
Traceability to NIST	Traceable to NIST
Physical Form	Liquid
Chemical Name or Material	Buffer Solution pH 7.0 at 25°C
Grade	Certified
Identification	Passes Test
CAS	1310-73-2
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	Phosphorus oxides; Sodium oxide
Health Hazard 2	GHS H Statement Solution is not hazardous.
Solubility Information	Soluble in water
pH	7.00 ±0.01
Recommended Storage	Room Temperature
Formula Weight	136.09
CAS Max %	0.08

Thermo Scientific Chemicals Tris(hydroxymethyl)aminomethane, ultrapure, 99.9%

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

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Buffers and Standards

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Potassium Chloride Conductivity Standard, 100 μS/cm at 25°C, Ricca Chemical GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

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

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

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

Buffer Solution pH 7.0 at 25°C, Certified, LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Potassium Chloride Conductivity Standard, 100 μS/cm at 25°C, Ricca Chemical

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

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

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

Buffer Solution pH 7.0 at 25°C, Certified, LabChem™