1.09119

Potassium dichromate solution

c(K₂Cr₂O₇) = 0.020 mol/l, for determination of COD, ready-to-use volumetric solution for titration, Titriplex^®

• Codice UNSPSC: 12352302
• NACRES: NA.21

Proprietà

• product name: Potassium dichromate solution, for determination of COD c(K₂Cr₂O₇) = 0.020 mol/l, Titripur^®
• Livello qualitativo: 200
• Nome Commerciale: Titripur^®
• Forma fisica: liquid
• Qualità: Analyzed in our ISO 17025 accredited QC lab
• Impiego in reazioni chimiche: reaction type: Redox Reactions
• Concentrazione: 0.02 M
• tecniche: titration: suitable
• pH: 3.8 (20 °C in H₂O)
• Densità: 1.0 g/cm³ at 20 °C
• Temperatura di conservazione: 15-25°C

Descrizione

Caratteristiche e vantaggi

Accreditation:
This volumetric solution is analyzed by our calibration laboratory D-K-15185-01-00 which is accredited according to DIN EN ISO/IEC 17025 for analysis of amount-of-substance concentrations in volumetric solutions by DAkkS (Deutsche Akkreditierungsstelle - German National Accreditation Body). The accreditation certificate can be found at www.sigmaaldrich.com/ISO17025.

Confezionamento

SKU-pack size numbers ending with a "3" are SmartChemicals with an RFID tag on the label for seamless data transfer to the instrument, e.g. xxxxxx1003 or xxxxxxx 4003. More information on www.sigmaaldrich.com/SmartChemicals

Risultati analitici

Form liquid
Amount-of-substance concentration 0.01990 - 0.02010 mol/L
Measurement uncertainty ± 0.00006 mol/L
Traceability NIST SRM

The concentration is determined by volumetric titration and refers to 20°C.
The amount-of-substance concentration of this volumetric solution is determined with standardized sodium thiosulfate solution (article number 1.09147). The sodium thiosulfate solution is standardized and traceable to a primary standard reference material (SRM) from the National Institute of Standards and Technology, Gaithersburg, USA (NIST SRM 136 potassium dichromate) by means of volumetric standard potassium iodate (article number 1.02404), certified reference material according to ISO 17034, analyzed by our accredited calibration laboratory of Merck KGaA, Darmstadt, Germany according to DIN EN ISO/IEC 17025. The uncertainty is expressed as expanded measurement uncertainty with a coverage factor k=2 covering a confidence level of 95%.

Note: The titer is a correction factor to correct for variations of the volumetric solution, the titration equipment, the temperature and other laboratory conditions. For correct titration results it is recommended to determine a titer with the laboratory specific equipment and under laboratory specific conditions directly after opening a new bottle and at regular time intervals.

Note legali

Titripur is a registered trademark of Merck KGaA, Darmstadt, Germany

Informazioni sulla sicurezza

• Pittogrammi: GHS08
• Avvertenze: Danger
• Indicazioni di pericolo: H340 - H350 - H360FD - H412
• Consigli di prudenza: P202 - P273 - P280 - P308 + P313 - P405 - P501
• Classi di pericolo: Aquatic Chronic 3 - Carc. 1B - Muta. 1B - Repr. 1B
• Codice della classe di stoccaggio: 6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
• Classe di pericolosità dell'acqua (WGK): WGK 3
• Punto d’infiammabilità (°F): Not applicable
• Punto d’infiammabilità (°C): Not applicable