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Merck

1.07204

Certified sec. standard reference buffer solution

potassium tetraoxalate dihydrate, directly traceable to primary SRM from NIST/PTB pH(S) = 1.679 (25°C) Certipur®

Synonym(s):

Potassium tetraoxalate dihydrate buffer solution, pH 1.7 Certified Secondary Buffer Solution

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About This Item

NACRES:
NA.25
UNSPSC Code:
41116107

Key Documents

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Product Name

Certified sec. standard reference buffer solution, potassium tetraoxalate dihydrate, directly traceable to primary SRM from NIST/PTB pH(S) = 1.679 (25°C) Certipur®

grade

certified reference material

agency

complies with DIN 19266

product line

Certipur®

pH

1.7 (25 °C in H2O)

density

1.003 g/cm3 at 20 °C

application(s)

environmental
food and beverages
general analytical
industrial qc
pharmaceutical

format

mixture

storage temp.

15-25°C

Quality Level

300

Related Categories

Analysis Note

pH-value: 1.674 - 1.683
For complete data see the enclosed certificate

Application

It can be used to calibrate, qualify, and monitor pH measuring instruments and as a control for testing other buffer solutions.

Features and Benefits

  • Available in a safe 100 mL high-density plastic bottle in solution format
  • Subjected to detailed stability studies as per ISO Guide 35
  • Product label carrying relevant information on order number, article description, lot number, expiry date and safety data, in accordance with ISO Guide 31
  • Accompanied with a detailed and batch-specific certificate of analysis (CoA) for an effective quality management system
  • Measured and qualified in ISO/IEC 17025 and ISO 17034 accredited laboratory
  • Traceable to SRMs from NIST and primary certified reference standards from PTB

General description

The potassium tetraoxalate dihydrate certified secondary standard reference buffer solution is gravimetrically prepared using high-quality salt in high-purity water. Its pH value is measured by differential potentiometry with two platinum hydrogen electrodes against primary certified reference materials from NIST & PTB. The pH qualification is based on the 5-point calibration method, following DIN 19268, against certified primary reference standards as per DIN 19266.

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.

Legal Information

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

Storage Class

12 - Non Combustible Liquids

wgk

nwg

flash_point_f

Not applicable

flash_point_c

Not applicable

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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Global Trade Item Number

SKUGTIN
1.07204.010504022536750170

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