Buffers and Standards
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
Standard di conducibilità con tracciabilità NIST, 1413μS/cm
Accredited to ISO 17025. Reagecon™ Conductivity Standard, NIST Traceable, 1,413μS/cm is an aqueous-based, non-hazardous standard with a high degree of accuracy, low temperature variation and guaranteed stability through the expiration date, even after opening the bottle.
HYDRANAL™-Sodium tartrate dihydrate, Honeywell Fluka™
Test substance for volumetric Karl Fischer titration (water content ∼15.66%, exact value on report of analysis)
Promozioni disponibili
Buffer Tablets, pH 4 (Phthalate), for pH measurement, to make-up volume of 100ml, Fisher Chemical™
Buffer Tablets, pH 4 (Phthalate), for pH measurement, to make-up volume of 100ml, Fisher Chemical, White, Packaging: Glass Jar, Quantity: 50 tablets, MDL Number: 81857, Physical Form: Solid
Buffer Colour Coded Solution pH7.00 (Phosphate) Yellow, NIST Standard Solution ready to use for pH measurement, Fisher Chemical™
CAS: 7778-77-0 Formula molecolare: H2KO4P Molecular Weight (g/mol): 136.08 InChI Key: GNSKLFRGEWLPPA-UHFFFAOYSA-M IUPAC Name: potassium dihydrogen phosphate SMILES: [K+].OP(O)([O-])=O
Promozioni disponibili
Oxalic Acid Dihydrate, Extra Pure, SLR, Fisher Chemical™
CAS: 6153-56-6 Formula molecolare: C2H6O6 Molecular Weight (g/mol): 126.064 Numero MDL: 149102 InChI Key: GEVPUGOOGXGPIO-UHFFFAOYSA-N PubChem CID: 61373 IUPAC Name: oxalic acid;dihydrate SMILES: C(=O)(C(=O)O)O.O.O
Tisab Solution, Pure, Fisher Chemical
Tisab Solution, Pure, Fisher Chemical, Quantity: 5L, Packaging: Plastic container, Colorless, pH: 5 to 7, MDL Number: 148650, Physical Form: Liquido
Promozioni disponibili
Hydrogen Peroxide 6% (w/v) (20 Volumes), Extra Pure SLR, Fisher Chemical™
CAS: 7722-84-1 Formula molecolare: H2O2 Molecular Weight (g/mol): 34.014 Numero MDL: 11333 InChI Key: MHAJPDPJQMAIIY-UHFFFAOYSA-N Sinonimo: oxydol,perhydrol,superoxol,interox,hydrogen dioxide,inhibine,peroxaan,albone,hioxyl,kastone PubChem CID: 784 ChEBI: CHEBI:16240 IUPAC Name: hydrogen peroxide SMILES: OO
Promozioni disponibili
Thermo Scientific Chemicals MES monohydrate, 98%
CAS: 145224-94-8 Formula molecolare: C6H15NO5S Molecular Weight (g/mol): 213.248 Numero MDL: MFCD00149409 InChI Key: MIIIXQJBDGSIKL-UHFFFAOYSA-N PubChem CID: 16218417 IUPAC Name: 2-morpholin-4-ylethanesulfonic acid;hydrate SMILES: C1COCCN1CCS(=O)(=O)O.O
Promozioni disponibili
Buffer Solution pH4.00 (Phthalate), NIST Standard Solution ready to use for pH measurement, Fisher Chemical™
Numero MDL: 217672
Promozioni disponibili
Sodium thiosulfate, 0.01N Standardized Solution, Thermo Scientific Chemicals
CAS: 7772-98-7 Formula molecolare: Na2O3S2 Molecular Weight (g/mol): 158.10 Numero MDL: MFCD00003499 InChI Key: AKHNMLFCWUSKQB-UHFFFAOYSA-L Sinonimo: sodium thiosulfate,sodium thiosulphate,disodium thiosulfate,sodium thiosulfate anhydrous,hypo,sodiumthiosulfate,chlorine cure,chlorine control,declor-it,thiosulfuric acid, disodium salt PubChem CID: 24477 IUPAC Name: disodium;dioxido-oxo-sulfanylidene-$l^{6}-sulfane SMILES: [Na+].[Na+].[O-]S([S-])(=O)=O
Buffer Tablets, pH 7 (Phosphate), for pH measurement, to make-up volume of 100ml, Fisher Chemical™
Buffer Tablets, pH 7 (Phosphate), for pH measurement, to make-up volume of 100ml, Fisher Chemical, White, Packaging: Glass Jar, Quantity: 50 tablets, MDL Number: 81857, Physical Form: Solid