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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

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About This Item

NACRES:
NA.24
UNSPSC Code:
41115601
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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)

reaction suitability

reaction type: water standard for Karl Fischer titration

packaging

ampule of 10 × 8 mL

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

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.

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

In our effort to be more sustainable, we′re going digital with COAs-download them directly from our website. Download your certificate at https://www.sigmaaldrich.com/US/en/documents-search 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 digital certificate of nalysis (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

pictograms

FlameExclamation mark
GHS02,GHS07

signalword

Warning

Hazard Classifications

Flam. Liq. 3 - STOT SE 3

target_organs

Central nervous system

Storage Class

3 - Flammable liquids

wgk

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.

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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