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Buffer solution DuraCal pH 4.01 ±0.01 (25 °C)

tinted RED, with DAkkS certificate
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Pack Qty.
Density (D) ~1 g/cm³
Boiling point (bp) 100 °C

Potassium hydrogen phthalate

€42.90/Pack Qty. 

excl. VAT. | 500 ml per Pack Qty.

Art. No. 25AX.1

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Product details

Buffer solution DuraCal pH 4.01 ±0.01 (25 °C) tinted RED, with DAkkS certificate

Technical Information
pH value 4,01 
Buffer solution DuraCal pH 4.01 ±0.01 (25 °C)
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Art. No. Pack Qty. Pack. Price Quantity
25AX.1 500 ml dosage bottle


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Downloads / MSDS

General information

pH-Buffer Solutions, DuraCal


  • Bottles with built-in calibration chamber
  • Only around 15 ml of solution required per calibration
  • Accurate and fast calibration of the measuring devices
  • The pH value is set by comparison with two different buffer reference solutions that can be traced back to primary reference materials from PTB or NIST
  • Certified pH value: the buffer solutions are independently certified by the DAkkS
  • Stabilised against microbial growth
  • Certificates of analysis incl. DAkkS certificate are available online

Certificates of Analysis

You can search for and download your certificate of analysis for the selected product here. Please provide your batch number.
The following analysis certificates have been found:

Type analysis

pH value (25 °C)4.01 ±0.01
Traceable to SRM from PTB or NIST., Composition: proprietary information