Water standard oil

standard for oil samples for coulometric Karl Fischer Titration (15-30 ppm) Aquastar®

storage conditions

Store at +15°C to +25°C.

Quality Level


ISO 17025,17034

product line





Karl-Fischer titration: suitable
titration: suitable

kinematic viscosity

7.8 cSt(20 °C)


0.88 g/cm3 at 20 °C

storage temp.


General description

Water standard oil is composed using transformer oil and its water content is measured by coulometric Karl Fischer titration according to ISO 760. It is designed for applications requiring the measurement of water content in oil samples.


It finds applications as a certified reference material (CRM) in checking the accuracy of coulometric Karl Fischer titrators as per ISO 9001 chapter 7.1.5 “Monitoring and measuring resources”.

Features and Benefits

  • Packed in convenient 8 mL glass ampoules with 10 single-use ampoules in a box
  • Subjected to stability and homogeneity studies following ISO 17034 and ISO Guide 35
  • Measured and qualified in an ISO/IEC 17025 and ISO 17034 accredited laboratory
  • Directly traceable to SI unit (kg) and verified by SRM 2890 from NIST


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

Analysis Note

Assay (H₂O): 0.015 - 0.030 mg/g

Legal Information

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

Certificate of Analysis

Certificate of Origin

SmartChemicals enable wireless transfer of CoA data stored on an RFID tag on the consumable bottle to the titrator, reducing effort and chance for human error. Crucial data required for the application is transmitted safely, reliably and intelligently to the instrument.
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