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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 12,891 results
1
Promotions Available

FisherTab™ TT-35 Kjeldahl Tablets, Fisher Chemical

Composition per tablet: 3.5g K2SO4 + 0.1g CuSO4 + 0.1g TiO2

EDGE
2

Sodium Thiosulfate, 0.0100 N (N/100), Ricca Chemical

CAS: 10102-17-7 Molecular Formula: H10Na2O8S2 Molecular Weight (g/mol): 248.17 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 pentahydrate sulfanidesulfonate SMILES: O.O.O.O.O.[Na+].[Na+].[O-]S([S-])(=O)=O

EDGE
PubChem CID 61475
CAS 10102-17-7
Molecular Weight (g/mol) 248.17
ChEBI CHEBI:32150
SMILES O.O.O.O.O.[Na+].[Na+].[O-]S([S-])(=O)=O
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 pentahydrate sulfanidesulfonate
InChI Key PODWXQQNRWNDGD-UHFFFAOYSA-L
Molecular Formula H10Na2O8S2
3

Calcium Chloride, 2.75% (w/v), Ricca Chemical

CAS: 10035-04-8

EDGE
CAS 10035-04-8
4
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Potassium Iodide, 1.0N, Fisher Chemical™

CAS: 7681-11-0 Molecular Formula: IK Molecular Weight (g/mol): 166.003 MDL Number: MFCD00011405 InChI Key: NLKNQRATVPKPDG-UHFFFAOYSA-M Synonym: potassium iodide,potassium iodide ki,pima,kali iodide,thyro-block,knollide,kisol,asmofug e,potassium diiodide,potassium monoiodide PubChem CID: 4875 ChEBI: CHEBI:8346 IUPAC Name: potassium;iodide SMILES: [K+].[I-]

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PubChem CID 4875
CAS 7681-11-0
Molecular Weight (g/mol) 166.003
ChEBI CHEBI:8346
MDL Number MFCD00011405
SMILES [K+].[I-]
Synonym potassium iodide,potassium iodide ki,pima,kali iodide,thyro-block,knollide,kisol,asmofug e,potassium diiodide,potassium monoiodide
IUPAC Name potassium;iodide
InChI Key NLKNQRATVPKPDG-UHFFFAOYSA-M
Molecular Formula IK
5
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Calcium Chloride Solution, Fisher Chemical

CAS: 10043-52-4 Molecular Formula: CaCl2 Molecular Weight (g/mol): 110.98 MDL Number: MFCD00149613 InChI Key: UXVMQQNJUSDDNG-UHFFFAOYSA-L Synonym: calcium chloride,calcium dichloride,calcium chloride anhydrous,calcium ii chloride,calciumchloride,caloride,liquical,calcium chloride pellets,isocal,jarcal PubChem CID: 5284359 ChEBI: CHEBI:3312 IUPAC Name: calcium dichloride SMILES: [Cl-].[Cl-].[Ca++]

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PubChem CID 5284359
CAS 10043-52-4
Molecular Weight (g/mol) 110.98
ChEBI CHEBI:3312
MDL Number MFCD00149613
SMILES [Cl-].[Cl-].[Ca++]
Synonym calcium chloride,calcium dichloride,calcium chloride anhydrous,calcium ii chloride,calciumchloride,caloride,liquical,calcium chloride pellets,isocal,jarcal
IUPAC Name calcium dichloride
InChI Key UXVMQQNJUSDDNG-UHFFFAOYSA-L
Molecular Formula CaCl2
6
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TAN Standard (Certified), Fisher Chemical

CAS: 79-09-4 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

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PubChem CID 1032
CAS 79-09-4
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
7

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

EDGE
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
8

Inorganic Carbon Standard, 1000 ppm C, Ricca Chemical

CAS: 144-55-8 Molecular Formula: CHNaO3 Molecular Weight (g/mol): 84.01 MDL Number: MFCD00003528 InChI Key: UIIMBOGNXHQVGW-UHFFFAOYSA-M IUPAC Name: sodium hydrogen carbonate SMILES: [Na+].OC([O-])=O

EDGE
CAS 144-55-8
Molecular Weight (g/mol) 84.01
MDL Number MFCD00003528
SMILES [Na+].OC([O-])=O
IUPAC Name sodium hydrogen carbonate
InChI Key UIIMBOGNXHQVGW-UHFFFAOYSA-M
Molecular Formula CHNaO3
9
Promotions Available

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

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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
10
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Buffer Solution, pH 7.40 (Certified), Fisher Chemical™
GSA_VA

Potassium Phosphate Monobasic/Sodium Hydroxide

EDGE
Boiling Point 100°C
CAS 7732-18-5
MDL Number MFCD00134130
Traceability to NIST Traceable to NIST.
Packaging Poly Bottle
Physical Form Liquid
pH 7.4
Chemical Name or Material Buffer Solution, pH 7.40
Grade Certified
Identification Pass Test
ChemAlert Storage Symbol Gray
Density 1.0g/cm³
Melting Point 0°C
11
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Buffer Solution, pH 9.00 (Certified), Fisher Chemical™
GSA_VA

Boric Acid/Potassium Chloride/Sodium Hydroxide

EDGE
Boiling Point 100°C
CAS 7732-18-5
Health Hazard 3 Emergency Overview
May cause eye, skin, and respiratory tract irritation. 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. Obtain medical attention. Obtain medical attention. .

NFPA

Health:1
Flammability:0
Instability:0
MDL Number MFCD00146206
Health Hazard 2 CAUTION!
Traceability to NIST Traceable to NIST.
Physical Form Liquid
pH 9.00
Chemical Name or Material Buffer Solution, pH 9.00
Grade Certified
Identification Pass Test
ChemAlert Storage Symbol Gray
Melting Point 0°C
12
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Buffer Solution, pH 4.00 (Certified), Fisher Chemical™
GSA_VA

EDGE
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
13

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

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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
14

Chemical Oxygen Demand Standard, 300 ppm COD, Ricca Chemical

Potassium Acid Phthalate in Water. For Chemical Oxygen Demand in Water (Non-Regulated).

EDGE
Boiling Point 100°C
Packaging Natural Poly Bottle
Chemical Name or Material COD STANDARD
15

Ammonia TS 2, Ricca Chemical

CAS: 1336-21-6 Molecular Formula: H5NO Molecular Weight (g/mol): 35.05 MDL Number: MFCD00066650 InChI Key: VHUUQVKOLVNVRT-UHFFFAOYSA-N PubChem CID: 14923 ChEBI: CHEBI:18219 IUPAC Name: amine hydrate SMILES: N.O

EDGE
PubChem CID 14923
CAS 1336-21-6
Molecular Weight (g/mol) 35.05
ChEBI CHEBI:18219
MDL Number MFCD00066650
SMILES N.O
IUPAC Name amine hydrate
InChI Key VHUUQVKOLVNVRT-UHFFFAOYSA-N
Molecular Formula H5NO