1.19780

Chromate standard solution

traceable to SRM of NIST K₂CrO₄ in H₂O 1000 mg/l CrO₄ Certipur^®

• Synonym(s): Chromate standard for aqueous matrices ready foruse, Nota 1 A
• UNSPSC Code: 41116107

Properties

• Quality Level: 100
• technique(s): ion chromatography: suitable
• pH: 7 (20 °C in H₂O)
• density: 1.0 g/cm³ at 20 °C
• application(s): environmental; food and beverages
• format: single component solution
• storage temp.: 15-25°C

Description

Analysis Note

Concentration     β (CrO₄²⁻): 990 - 1010 mg/l
Determination method: Iodometric titration.
The content of this solution was determined with sodium thiosulfate standard solution (article number 1.09147) standardized against volumetric standard potassium iodate (article number 1.02404). The expanded measurement uncertainty is ± 0.4 % (k=2 coverage factor for 95% coverage probability). The certified value is traceable to primary standard NIST SRM 136f (NIST: National Institute of Standards and Technology, USA) by means of volumetric standard potassium iodate, measured in the accredited calibration laboratory of Merck KGaA, Darmstadt, Germany in accordance to DIN EN ISO/IEC 17025.

Legal Information

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

Safety Information

• Pictograms: GHS08
• Signal Word: Danger
• Hazard Statements: H340 - H350i
• Precautionary Statements: P201 - P202 - P280 - P308 + P313 - P405 - P501
• Hazard Classifications: Carc. 1B Inhalation - Muta. 1B
• Storage Class Code: 6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
• WGK: WGK 1
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable