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Buffer Solution, pH 4.005, Chem-Lab

Product Code. 11933353
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Quantity:
500 mL
Unit Size:
500mL
This item is not returnable. View return policy
This item is not returnable. View return policy

Description

Designed for pH measurement and maintenance. Buffer Solution, pH 4.005, Chem-Lab is a solution of 10.13g potassium hydrogen phthalate per 1L water, with a pH level of 4.005 ±0.01 at 25°C. NIST traceable solution is manufactured according to Eur. Ph. 4(2.2.3) standards.

pH Levels ± 0.01:
  • 0°C—pH 4.005
  • 5°C—pH 4.003
  • 10°C—pH 4.001
  • 15°C—pH 4.002
  • 20°C—pH 4.003
  • 25°C—pH 4.005
  • 30°C—pH 4.010
  • 35°C—pH 4.020
  • 37°C—pH 4.025
  • 40°C—pH 4.033
  • 45°C—pH 4.047
  • 50°C—pH 4.061

Specifications

Chemical Name or Material Potassium hydrogen phthalate
CAS 877-24-7, 7732-18-5
Melting Point 0°C
Boiling Point 100°C
For Use With (Application) Laboratory use
pH 4.005 ±0.01
Physical Form Liquid
Quantity 500 mL
Solution Type Buffer
Formulation 10.13g C8H5KO4 per 1L H2O
Molecular Formula C8H5KO4
Odor Odorless
Traceability to NIST Yes (SRM - 185g)
Solubility Information Soluble in water
Formula Weight 201.23
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