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
HYDRANAL™ - Composite 5, Honeywell Fluka™
Titrating agent for volumetric, one-component Karl Fischer titrations (Methanol-free)
Ethylenediaminetetraacetic Acid (0.5M Solution/pH 8.0), Fisher BioReagents
CAS: 60-00-4 Molecular Formula: C10H16N2O8 Molecular Weight (g/mol): 292.24 MDL Number: MFCD00003541 InChI Key: KCXVZYZYPLLWCC-UHFFFAOYSA-N Synonym: edta,edetic acid,ethylenediaminetetraacetic acid,edathamil,versene,endrate,havidote,titriplex,edta acid,sequestrol PubChem CID: 6049 ChEBI: CHEBI:42191 IUPAC Name: 2-[2-[bis(carboxymethyl)amino]ethyl-(carboxymethyl)amino]acetic acid SMILES: OC(=O)CN(CCN(CC(O)=O)CC(O)=O)CC(O)=O
HYDRANAL™ - NEXTGEN Coulomat C-FA, Honeywell Fluka™
Catholyte for coulometric Karl Fischer titration of ketones and Li-ion battery electrolytes, Acetonitrile-based, free of alcohols (free of CMR substances).
Oxalic acid, 10% w/v aq. soln.
CAS: 144-62-7 Molecular Formula: C2H2O4 Molecular Weight (g/mol): 90.034 MDL Number: MFCD00002573 InChI Key: MUBZPKHOEPUJKR-UHFFFAOYSA-N PubChem CID: 971 ChEBI: CHEBI:16995 IUPAC Name: oxalic acid SMILES: C(=O)(C(=O)O)O
Oxalic Acid Dihydrate, Extra Pure, SLR, Fisher Chemical™
CAS: 6153-56-6 Molecular Formula: C2H6O6 Molecular Weight (g/mol): 126.064 MDL Number: 149102 InChI Key: GEVPUGOOGXGPIO-UHFFFAOYSA-N PubChem CID: 61373 IUPAC Name: oxalic acid;dihydrate SMILES: C(=O)(C(=O)O)O.O.O
Thermo Scientific Chemicals HEPES free acid, 99+%, for molecular biology, DNase, Rnase and Protease free
CAS: 7365-45-9 Molecular Formula: C8H18N2O4S Molecular Weight (g/mol): 238.30 MDL Number: MFCD00006158 InChI Key: JKMHFZQWWAIEOD-UHFFFAOYSA-N Synonym: 2-[4-(2-Hydroxyethyl)-1-piperazine]ethanesulfonic acid PubChem CID: 23831 ChEBI: CHEBI:42334 IUPAC Name: 2-[4-(2-hydroxyethyl)piperazin-1-yl]ethane-1-sulfonic acid SMILES: OCCN1CCN(CCS(O)(=O)=O)CC1
Oxalic Acid Dihydrate, Certified AR for Analysis, Fisher Chemical™
CAS: 6153-56-6 Molecular Formula: C2H6O6 Molecular Weight (g/mol): 126.064 MDL Number: 149102 InChI Key: GEVPUGOOGXGPIO-UHFFFAOYSA-N PubChem CID: 61373 IUPAC Name: oxalic acid;dihydrate SMILES: C(=O)(C(=O)O)O.O.O
