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 (19,404)

Spectroscopy Standards (6,124)

General Chemistry Solutions (5,096)

Matrix Blanks and Standardization Solutions (4,148)

Life Science Buffers (3,685)

Electrochemistry Buffers (2,288)

Environmental Testing Standards (1,866)

Electrochemistry Standards (1,168)

Karl Fischer Buffers and Reagents (560)

Viscosity Standards (234)

Isotope Standards (186)

Quality Control and Proficiency Samples (181)

Kjeldahl Buffers and Reagents (100)

Gel Filtration Standards (60)

Matrix Modifiers (31)

Osmolality Standards (10)

Polarimetric Standards (3)

Smoke Point Reference (3)

136 – 150 of 39,547 results

136

Promotions Available

Tris Hydrochloride (Small White Flakes/Molecular Biology), Fisher BioReagents

CAS: 1185-53-1 Molecular Formula: C4H12ClNO3 Molecular Weight (g/mol): 157.594 InChI Key: QKNYBSVHEMOAJP-UHFFFAOYSA-N Synonym: Tris(hydroxymethyl)aminomethane 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
SMILES	C(C(CO)(CO)N)O.Cl
Synonym	Tris(hydroxymethyl)aminomethane Hydrochloride
IUPAC Name	2-amino-2-(hydroxymethyl)propane-1,3-diol;hydrochloride
InChI Key	QKNYBSVHEMOAJP-UHFFFAOYSA-N
Molecular Formula	C4H12ClNO3

137

Tris Hydrochloride, 1M Solution (pH 7.5/Mol. Biol.), Fisher BioReagents™

CAS: 77-86-1,7732-18-5,1185-53-1 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	77-86-1,7732-18-5,1185-53-1
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

138

Phenol/Chloroform/Isoamyl Alcohol (25:24:1 Mixture, pH 6.7/8.0, Liq.), Fisher BioReagents™

CAS: 67-66-3,123-51-3,108-95-2 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	67-66-3,123-51-3,108-95-2
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

139

Traceable™ pH Buffer Standards, Certified Reference Material (CRM), Fisherbrand™

IUPAC formulation

Pricing & Availability
Specifications

For Use With (Equipment)	Instruments and Electrodes
Traceability to NIST	Traceable to NIST
Physical Form	Liquid
Chemical Name or Material	pH Buffer Standards
Grade	Certified
Purity Grade Notes	Accuracy at 25°C is ±0010pH
For Use With (Application)	Calibration
ChemAlert Storage Symbol	Gray
Solution Type	Buffer

140

TAN Standard (Certified), Fisher Chemical

CAS: 8012-95-1 Molecular Formula: C3H6O2 Molecular Weight (g/mol): 74.079 MDL Number: MFCD00212734 InChI Key: XBDQKXXYIPTUBI-UHFFFAOYSA-N PubChem CID: 1032 ChEBI: CHEBI:30768 IUPAC Name: propanoic acid SMILES: CCC(=O)O

Pricing & Availability
Specifications

PubChem CID	1032
CAS	8012-95-1
Molecular Weight (g/mol)	74.079
ChEBI	CHEBI:30768
MDL Number	MFCD00212734
SMILES	CCC(=O)O
IUPAC Name	propanoic acid
InChI Key	XBDQKXXYIPTUBI-UHFFFAOYSA-N
Molecular Formula	C3H6O2

141

Promotions Available

Tris (Tromethamine) (Granular/USP), Fisher Chemical™

CAS: 7646-85-7 Molecular Formula: C4H11NO3 Molecular Weight (g/mol): 121.136 MDL Number: MFCD00004679 InChI Key: LENZDBCJOHFCAS-UHFFFAOYSA-N Synonym: Trishydroxymethylaminomethane,Tris Buffer,Tris,THAM,Trizma™,2-Amino-2-(hydroxymethyl)-1,3-propanediol,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	7646-85-7
Molecular Weight (g/mol)	121.136
ChEBI	CHEBI:9754
MDL Number	MFCD00004679
SMILES	C(C(CO)(CO)N)O
Synonym	Trishydroxymethylaminomethane,Tris Buffer,Tris,THAM,Trizma™,2-Amino-2-(hydroxymethyl)-1,3-propanediol,Tris base,Tris(hydroxymethyl)aminomethane,Trometamol
IUPAC Name	2-amino-2-(hydroxymethyl)propane-1,3-diol
InChI Key	LENZDBCJOHFCAS-UHFFFAOYSA-N
Molecular Formula	C4H11NO3

142

Promotions Available

Buffer Solution, pH 6.00 (Certified), Fisher Chemical™

Pricing & Availability
Specifications

Boiling Point	100°C
Color	Undesignated
Traceability to NIST	Traceable to NIST.
Physical Form	Liquid
Chemical Name or Material	Buffer Solution, pH 6.00
Grade	Certified
Identification	Pass Test
ChemAlert Storage Symbol	Gray
CAS	1310-73-2
Health Hazard 3	Emergency Overview May cause eye, skin, and respiratory tract irritation. Handle in accordance with good industrial hygiene and safety practice. Wash off immediately with plenty of water for at least 15 minutes. Get medical attention immediately if symptoms occur. Rinse immediately with plenty of water, also under the eyelids, for at least 15 minutes. Obtain medical attention. Move to fresh air. If breathing is difficult, give oxygen. Get medical attention immediately if symptoms occur. Do not induce vomiting. Obtain medical attention. . . NFPA Health:1 Flammability:0 Instability:0
MDL Number	MFCD00134130
Health Hazard 2	CAUTION!
pH	6.00
Melting Point	0°C

143

Promotions Available

Buffer Solution, pH 4.00 (Certified), Fisher Chemical™

Pricing & Availability
Specifications

CAS	67-56-1
Health Hazard 3	Emergency Overview Contains a known or suspected carcinogen. The toxicological properties have not been fully investigated. Use personal protective equipment. Ensure adequate ventilation. Wash off immediately with plenty of water for at least 15 minutes. Get medical attention immediately if symptoms occur. Rinse immediately with plenty of water, also under the eyelids, for at least 15 minutes. Obtain medical attention. Move to fresh air. If breathing is difficult, give oxygen. Get medical attention immediately if symptoms occur. Do not induce vomiting. Do not induce vomiting. Obtain medical attention. NFPA Health:1 Flammability:0 Instability:0
MDL Number	MFCD00146206
Health Hazard 2	CAUTION!
Color	Undesignated
Traceability to NIST	Traceable to NIST.
Physical Form	Liquid
pH	4.0
Chemical Name or Material	Buffer Solution, pH 4.00
Grade	Certified
Identification	Pass Test
ChemAlert Storage Symbol	Gray
Density	1.0054g/cm³

144

Color Standard, Pt-Co, 500 Units APHA, Stock Solution, Certified, LabChem™

Pricing & Availability
Specifications

Linear Formula	K₂(PtCl₆)
Solubility	Soluble in water
Color	Orange
Physical Form	Liquid
UN Number	UN1789
Chemical Name or Material	Color Standard
Grade	Certified
Identification	Passes Test
Name Note	Pt-Co, 500 Units APHA, Stock Solution
CAS	7732-18-5
Health Hazard 3	GHS P Statement Obtain special instructions before use. Do not handle until all safety precautions have been read and understood. Do not breathe mist, vapors, spray. Contaminated work clothing must not be allowed out of the workplace. Wear protective gloves, eye protection, protective clothing, face protection. Wear respiratory protection. Wash exposed skin thoroughly after handling. If swallowed: Rinse mouth. Do not induce vomiting. Immediately call a poison center/doctor. If on skin (or hair): Remove 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.
Health Hazard 2	GHS H Statement Causes severe skin burns and eye damage. May cause an allergic skin reaction. May cause allergy or asthma symptoms or breathing difficulties if inhaled. May cause cancer. May damage fertility or the unborn child.
Health Hazard 1	Danger
Packaging	Amber Glass
Recommended Storage	Room Temperature
Formula Weight	485.99
CAS Max %	0.1

145

Sodium Citrate, 3.8% (w/v), Ricca Chemical

CAS: 6132-04-3 Molecular Formula: C6H9Na3O9 Molecular Weight (g/mol): 294.10 InChI Key: NLJMYIDDQXHKNR-UHFFFAOYSA-K Synonym: trisodium citrate dihydrate,sodium citrate dihydrate,sodium citrate tribasic dihydrate,natriumcitrat-dihydrat,sodium citrate hydrate,1,2,3-propanetricarboxylic acid, 2-hydroxy-, trisodium salt, dihydrate,citronensaeure-tri-na-salz-dihydrat,citric acid trisodium salt dihydrate,citric acid, trisodium salt dihydrate,trisodium 2-hydroxypropane-1,2,3-tricarboxylate dihydrate PubChem CID: 71474 ChEBI: CHEBI:32142 IUPAC Name: trisodium;2-hydroxypropane-1,2,3-tricarboxylate;dihydrate SMILES: C(C(=O)[O-])C(CC(=O)[O-])(C(=O)[O-])O.O.O.[Na+].[Na+].[Na+]

Pricing & Availability
Specifications

PubChem CID	71474
CAS	6132-04-3
Molecular Weight (g/mol)	294.10
ChEBI	CHEBI:32142
SMILES	C(C(=O)[O-])C(CC(=O)[O-])(C(=O)[O-])O.O.O.[Na+].[Na+].[Na+]
Synonym	trisodium citrate dihydrate,sodium citrate dihydrate,sodium citrate tribasic dihydrate,natriumcitrat-dihydrat,sodium citrate hydrate,1,2,3-propanetricarboxylic acid, 2-hydroxy-, trisodium salt, dihydrate,citronensaeure-tri-na-salz-dihydrat,citric acid trisodium salt dihydrate,citric acid, trisodium salt dihydrate,trisodium 2-hydroxypropane-1,2,3-tricarboxylate dihydrate
IUPAC Name	trisodium;2-hydroxypropane-1,2,3-tricarboxylate;dihydrate
InChI Key	NLJMYIDDQXHKNR-UHFFFAOYSA-K
Molecular Formula	C6H9Na3O9

146

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

147

Lanthanum Nitrate TS, Ricca Chemical

CAS: 10277-43-7 Molecular Formula: H12LaN3O15 Molecular Weight (g/mol): 433.01 MDL Number: MFCD00149751 InChI Key: GJKFIJKSBFYMQK-UHFFFAOYSA-N PubChem CID: 16211478 IUPAC Name: lanthanum(3+) hexahydrate trinitrate SMILES: O.O.O.O.O.O.[La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O

Pricing & Availability
Specifications

PubChem CID	16211478
CAS	10277-43-7
Molecular Weight (g/mol)	433.01
MDL Number	MFCD00149751
SMILES	O.O.O.O.O.O.[La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O
IUPAC Name	lanthanum(3+) hexahydrate trinitrate
InChI Key	GJKFIJKSBFYMQK-UHFFFAOYSA-N
Molecular Formula	H12LaN3O15

148

Ethidium bromide soln., 10mg/ml

CAS: 1239-45-8 Molecular Formula: C21H20BrN3 Molecular Weight (g/mol): 394.32 MDL Number: MFCD00011724 InChI Key: ZMMJGEGLRURXTF-UHFFFAOYSA-N Synonym: ethidium bromide,homidium bromide,dromilac,3,8-diamino-5-ethyl-6-phenylphenanthridinium bromide,ethydium bromide,3,8-diamino-5-ethyl-6-phenylphenanthridin-5-ium bromide,etbr,2,7-diamino-10-ethyl-9-phenylphenanthridinium bromide,2,7-diamino-9-phenyl-10-ethylphenanthridinium bromide,unii-059nuo2z1l PubChem CID: 14710 ChEBI: CHEBI:4883 IUPAC Name: 5-ethyl-6-phenylphenanthridin-5-ium-3,8-diamine;bromide SMILES: [Br-].CC[N+]1=C(C2=CC=CC=C2)C2=CC(N)=CC=C2C2=CC=C(N)C=C12

Pricing & Availability
Specifications

PubChem CID	14710
CAS	1239-45-8
Molecular Weight (g/mol)	394.32
ChEBI	CHEBI:4883
MDL Number	MFCD00011724
SMILES	[Br-].CC[N+]1=C(C2=CC=CC=C2)C2=CC(N)=CC=C2C2=CC=C(N)C=C12
Synonym	ethidium bromide,homidium bromide,dromilac,3,8-diamino-5-ethyl-6-phenylphenanthridinium bromide,ethydium bromide,3,8-diamino-5-ethyl-6-phenylphenanthridin-5-ium bromide,etbr,2,7-diamino-10-ethyl-9-phenylphenanthridinium bromide,2,7-diamino-9-phenyl-10-ethylphenanthridinium bromide,unii-059nuo2z1l
IUPAC Name	5-ethyl-6-phenylphenanthridin-5-ium-3,8-diamine;bromide
InChI Key	ZMMJGEGLRURXTF-UHFFFAOYSA-N
Molecular Formula	C21H20BrN3

149

Buffer, Reference Standard, pH 1.68 ± 0.01 at 25°C, Ricca Chemical

Pricing & Availability
Specifications

Boiling Point	100°C
For Use With (Equipment)	pH Meter and Electrode
Color	Colorless
Physical Form	Liquid
pH	1.68
Concentration	1X
Shelf Life	24 months
For Use With (Application)	Calibration
Solution Type	pH Buffer
Melting Point	0°C

150

Conductivity Standard, 5 μS/cm at 25°C, Ricca Chemical

Pricing & Availability
Specifications

Boiling Point	100°C
Type	Conductivity Standard
CAS	7732-18-5
CAS Min %	98.0
Packaging	Natural Poly Bottle
Solution Type	Conductivity Standard
CAS Max %	100.0

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Buffers and Standards

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Tris Hydrochloride, 1M Solution (pH 7.5/Mol. Biol.), Fisher BioReagents™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Phenol/Chloroform/Isoamyl Alcohol (25:24:1 Mixture, pH 6.7/8.0, Liq.), Fisher BioReagents™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Tris (Tromethamine) (Granular/USP), Fisher Chemical™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer Solution, pH 6.00 (Certified), Fisher Chemical™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer Solution, pH 4.00 (Certified), Fisher Chemical™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Color Standard, Pt-Co, 500 Units APHA, Stock Solution, Certified, LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Sodium Citrate, 3.8% (w/v), Ricca Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

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

Conductivity Standard, 5 μS/cm at 25°C, Ricca Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Tris Hydrochloride, 1M Solution (pH 7.5/Mol. Biol.), Fisher BioReagents™

Phenol/Chloroform/Isoamyl Alcohol (25:24:1 Mixture, pH 6.7/8.0, Liq.), Fisher BioReagents™

Tris (Tromethamine) (Granular/USP), Fisher Chemical™

Buffer Solution, pH 6.00 (Certified), Fisher Chemical™

Buffer Solution, pH 4.00 (Certified), Fisher Chemical™

Color Standard, Pt-Co, 500 Units APHA, Stock Solution, Certified, LabChem™

Sodium Citrate, 3.8% (w/v), Ricca Chemical

Lanthanum Nitrate TS, Ricca Chemical

Conductivity Standard, 5 μS/cm at 25°C, Ricca Chemical