1.88052

Water Standard

1%, Certified Reference Material for volumetric Karl Fischer Titration 1 g ≙ 10 mg H₂O Aquastar^®

• Synonym(s): Water standard 1% for volumetric Karl Fischer Titration
• UNSPSC Code: 41115601
• NACRES: NA.24

Properties

• product name: Water standard 1%, Certified Reference Material for volumetric Karl Fischer Titration 1 g ≙ 10 mg H₂O Aquastar^®
• grade: certified reference material
• Quality Level: 300
• agency: ISO (17025, 17034)
• product line: Aquastar^®
• form: liquid
• autoignition temp.: 287 °C (DIN 51794,Information refers to the main component.)
• expl. lim.: 1.7 % (v/v)
• technique(s): Karl-Fischer titration: suitable; titration: suitable
• bp: 119 °C/1013 hPa
• mp: -95 °C
• transition temp: flash point 31 °C (Information refers to the main component.)
• density: 0.92 g/cm³ at 20 °C
• format: single component solution
• storage temp.: 15-25°C

Description

General description

Water standard 1% is prepared using high-purity water and reagents by the gravimetric method. Its characterization is carried out at an accredited quality control (QC) laboratory according to DIN EN ISO/IEC 17025. The water content of the standard is measured by direct coulometric Karl Fischer titration, in accordance with ISO 760.

Please visit ISO certificates and Site Quality Self-Assessments to access the current certificates of accreditation.

Download your certificate at http://www.sigma-aldrich.com to view certified values, including uncertainty and expiry date.

Application

Water standard 1% can be used for:

• Evaluating the accuracy of coulometric Karl Fischer titrators according to ISO 9001 chapter 7.1.5 “Monitoring and measuring resources” as a Certified reference material (CRM)
• Checking the accuracy of measured results according to European Pharmacopeia (Ph.Eur.) chapter 2.5.32 “Water Micro Determination”
• Standardizing titrants according to European Pharmacopeia (Ph.Eur.) chapter 2.5.12 “Water Semi-Micro Determination” and the United States Pharmacopeia <921> “Water Determination”
• Titer determinations using volumetric method with one component and two component reagents

Features and Benefits

• Packed in convenient 8 mL glass ampoules and 10 single-use ampoules in a box
• Supplied with a batch-specific certificate of analysis (CoA) having data on the exact measured water content of the batch, uncertainty, method of analysis, the NIST batch, and minimum shelf life
• Measured and qualified in an ISO/IEC 17025 and ISO 17034 accredited calibration laboratory
• Directly traceable to SI unit (kg) and verified by SRM 2890 from NIST

Packaging

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 SmartChemicals for Titration.

Analysis Note

Assay (H₂O): 9.90 - 10.10 mg/g

Legal Information

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

Safety Information

• pictograms: GHS02,GHS07
• signalword: Warning
• hcodes: H226 - H336
• pcodes: P210 - P233 - P240 - P241 - P242 - P243
• Hazard Classifications: Flam. Liq. 3 - STOT SE 3
• target_organs: Central nervous system
• Storage Class: 3 - Flammable liquids
• wgk_germany: WGK 1
• flash_point_f: 87.8 °F - Information refers to the main ingredient.
• flash_point_c: 31 °C - Information refers to the main ingredient.