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Water standard 1%

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


certified reference material

Nivel de calidad


ISO (17025, 17034)

Línea del producto




temp. de autoignición

287 °C (DIN 51794,Information refers to the main component.)

lim. expl.

1.7 % (v/v)


Karl-Fischer titration: suitable
titration: suitable


119 °C/1013 hPa


-95 °C

temperatura de transición

flash point 31 °C (Information refers to the main component.)


0.92 g/cm3 at 20 °C


single component solution

temp. de almacenamiento


Descripción general

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.


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


8, 8 mL
8 ml
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

Características y beneficios

  • 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

Nota de análisis

Assay (H₂O): 9.90 - 10.10 mg/g

Información legal

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


FlameExclamation mark

Palabra de señalización


Frases de peligro

Clasificaciones de peligro

Flam. Liq. 3 - STOT SE 3

Órganos de actuación

Central nervous system

Código de clase de almacenamiento

3 - Flammable liquids



Punto de inflamabilidad F

87.8 °F - Information refers to the main ingredient.

Punto de inflamabilidad C

31 °C - Information refers to the main ingredient.

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Quality

Enter Lot Number to search for Certificate of Quality (COQ).

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