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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

 

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Keyword Search:
1 – 15 of 11,908 results
1

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

CAS: 77-86-1 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

EDGE
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 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
2

Tris Base (White Crystals or Crystalline Powder/Triple-Crystallized), Fisher BioReagents™

For sensitive molecular biology, tissue culture, and electrophoresis methods | CAS: 77-86-1 | C4H11NO3 | 121.136 g/mol

EDGE
3

Tris Base (White Crystals or Crystalline Powder/Molecular Biology), Fisher BioReagents™

CAS: 77-86-1 Molecular Formula: C4H11NO3 Molecular Weight (g/mol): 121.136 InChI Key: LENZDBCJOHFCAS-UHFFFAOYSA-N Synonym: Trimethylol Aminomethane,Tris(hydroxymethyl)aminomethane,2-Amino-2-(hydroxymethyl)-1,3-propanediol,THAM,Tris base,Trometamol PubChem CID: 6503 ChEBI: CHEBI:9754 IUPAC Name: 2-amino-2-(hydroxymethyl)propane-1,3-diol SMILES: C(C(CO)(CO)N)O

EDGE
PubChem CID 6503
CAS 77-86-1
Molecular Weight (g/mol) 121.136
ChEBI CHEBI:9754
SMILES C(C(CO)(CO)N)O
Synonym Trimethylol Aminomethane,Tris(hydroxymethyl)aminomethane,2-Amino-2-(hydroxymethyl)-1,3-propanediol,THAM,Tris base,Trometamol
IUPAC Name 2-amino-2-(hydroxymethyl)propane-1,3-diol
InChI Key LENZDBCJOHFCAS-UHFFFAOYSA-N
Molecular Formula C4H11NO3
4

Sodium Thiosulfate Pentahydrate Solution (0.1N (N/10)/Certified), Fisher Chemical™

CAS: 10102-17-7 Molecular Formula: H10Na2O8S2 Molecular Weight (g/mol): 248.172 MDL Number: MFCD00003499 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 IUPAC Name: disodium;dioxido-oxo-sulfanylidene-$l^{6}-sulfane;pentahydrate SMILES: O.O.O.O.O.[O-]S(=O)(=S)[O-].[Na+].[Na+]

EDGE
PubChem CID 61475
CAS 10102-17-7
Molecular Weight (g/mol) 248.172
ChEBI CHEBI:32150
MDL Number MFCD00003499
SMILES O.O.O.O.O.[O-]S(=O)(=S)[O-].[Na+].[Na+]
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
IUPAC Name disodium;dioxido-oxo-sulfanylidene-$l^{6}-sulfane;pentahydrate
InChI Key PODWXQQNRWNDGD-UHFFFAOYSA-L
Molecular Formula H10Na2O8S2
5

Thiocyanate Standard Solution (0.1N (N/10)/Certified), Fisher Chemical

CAS: 333-20-0 Molecular Formula: CKNS Molecular Weight (g/mol): 97.176 MDL Number: MFCD00011413 InChI Key: ZNNZYHKDIALBAK-UHFFFAOYSA-M Synonym: Potassium Thiocyanate Solutions PubChem CID: 516872 ChEBI: CHEBI:30951 IUPAC Name: potassium;thiocyanate SMILES: C(#N)[S-].[K+]

EDGE
PubChem CID 516872
CAS 333-20-0
Molecular Weight (g/mol) 97.176
ChEBI CHEBI:30951
MDL Number MFCD00011413
SMILES C(#N)[S-].[K+]
Synonym Potassium Thiocyanate Solutions
IUPAC Name potassium;thiocyanate
InChI Key ZNNZYHKDIALBAK-UHFFFAOYSA-M
Molecular Formula CKNS
6

Sodium Thiosulfate Pentahydrate Solution (0.025N (N/40)/Certified), Fisher Chemical

CAS: 10102-17-7 Molecular Formula: H10Na2O8S2 Molecular Weight (g/mol): 248.172 MDL Number: MFCD00003499 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 IUPAC Name: disodium;dioxido-oxo-sulfanylidene-$l^{6}-sulfane;pentahydrate SMILES: O.O.O.O.O.[O-]S(=O)(=S)[O-].[Na+].[Na+]

EDGE
PubChem CID 61475
CAS 10102-17-7
Molecular Weight (g/mol) 248.172
ChEBI CHEBI:32150
MDL Number MFCD00003499
SMILES O.O.O.O.O.[O-]S(=O)(=S)[O-].[Na+].[Na+]
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
IUPAC Name disodium;dioxido-oxo-sulfanylidene-$l^{6}-sulfane;pentahydrate
InChI Key PODWXQQNRWNDGD-UHFFFAOYSA-L
Molecular Formula H10Na2O8S2
7

Electrode Storage Solution, Fisher BioReagents™

For use in storage of pH electrodes

EDGE
8

TBE Buffer, Tris-Borate-EDTA, 10X Solution, Electrophoresis, Fisher BioReagents™

CAS: 10043-35-3 Synonym: TBE

EDGE
CAS 10043-35-3
Synonym TBE
9

Silver Nitrate Solution (1N/Certified), Fisher Chemical

CAS: 7761-88-8 Molecular Formula: AgNO3 Molecular Weight (g/mol): 169.87 MDL Number: MFCD00003414 InChI Key: SQGYOTSLMSWVJD-UHFFFAOYSA-N Synonym: silver nitrate,silvernitrate,lunar caustic,silbernitrat,argenti nitras,nitrate d'argent,nitric acid silver i salt,silver mononitrate,silver i nitrate,argerol PubChem CID: 24470 ChEBI: CHEBI:32130 IUPAC Name: silver(1+) nitrate SMILES: [Ag+].[O-][N+]([O-])=O

EDGE
PubChem CID 24470
CAS 7761-88-8
Molecular Weight (g/mol) 169.87
ChEBI CHEBI:32130
MDL Number MFCD00003414
SMILES [Ag+].[O-][N+]([O-])=O
Synonym silver nitrate,silvernitrate,lunar caustic,silbernitrat,argenti nitras,nitrate d'argent,nitric acid silver i salt,silver mononitrate,silver i nitrate,argerol
IUPAC Name silver(1+) nitrate
InChI Key SQGYOTSLMSWVJD-UHFFFAOYSA-N
Molecular Formula AgNO3
10

Silver Nitrate Solution (0.1N (N/10)/Certified), Fisher Chemical™

CAS: 7761-88-8 Molecular Formula: AgNO3 Molecular Weight (g/mol): 169.87 MDL Number: MFCD00003414 InChI Key: SQGYOTSLMSWVJD-UHFFFAOYSA-N Synonym: silver nitrate,silvernitrate,lunar caustic,silbernitrat,argenti nitras,nitrate d'argent,nitric acid silver i salt,silver mononitrate,silver i nitrate,argerol PubChem CID: 24470 ChEBI: CHEBI:32130 IUPAC Name: silver(1+) nitrate SMILES: [Ag+].[O-][N+]([O-])=O

EDGE
PubChem CID 24470
CAS 7761-88-8
Molecular Weight (g/mol) 169.87
ChEBI CHEBI:32130
MDL Number MFCD00003414
SMILES [Ag+].[O-][N+]([O-])=O
Synonym silver nitrate,silvernitrate,lunar caustic,silbernitrat,argenti nitras,nitrate d'argent,nitric acid silver i salt,silver mononitrate,silver i nitrate,argerol
IUPAC Name silver(1+) nitrate
InChI Key SQGYOTSLMSWVJD-UHFFFAOYSA-N
Molecular Formula AgNO3
11

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

IUPAC formulation

EDGE
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
12

Buffer Solution, pH 4.00, Color-Coded Red (Certified), Fisher Chemical™

pH/temperature conversions given on label

EDGE
Boiling Point 100°C
Description pH/temperature conversions given on label.
Color Red
Traceability to NIST Traceable to NIST.
Physical Form Liquid
Chemical Name or Material Buffer Solution, pH 4.00, Color-Coded Red
Grade Certified
Identification Pass Test
ChemAlert Storage Symbol Gray
Density 1.0g/cm³
Absorbance Pass Test
Concentration or Composition (by Analyte or Components) Potassium Hydrogen Phthalate
CAS 16423-68-0
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!
Solubility Information Soluble in water
pH 4.0
Specific Gravity 1
Melting Point 0°C
13

Buffer Solution, pH 3.00 (Certified), Fisher Chemical™

EDGE
Boiling Point 100°C
Color Undesignated
Traceability to NIST Traceable to NIST.
Physical Form Liquid
Chemical Name or Material Buffer Solution, pH 3.00
Grade Certified
Identification Pass Test
ChemAlert Storage Symbol Gray
Density 0.7g/cm³
CAS 7732-18-5
Health Hazard 3 Emergency Overview
May cause eye, skin, and respiratory tract irritation. 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!
pH 3.00
Melting Point 0°C
14

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

Potassium Phosphate Monobasic/Sodium Hydroxide

EDGE
Color Colorless
Traceability to NIST Traceable to NIST.
Physical Form Liquid
Chemical Name or Material Buffer Solution, pH 7.00
Grade Certified
Identification Pass Test
ChemAlert Storage Symbol Gray
Density 1.003g/cm³
Vapor Pressure 14mmHg at 20°C
CAS 7732-18-5
MDL Number MFCD00134130
pH 7.00
Synonym Chlorine Titrimeter Reagent
Melting Point 0°C
15

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

EDGE
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