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Mettler Toledo™ Thiourea Cleaning Solution

Removes silver sulfide contamination from pH electrodes. Mettler Toledo™ Thiourea Cleaning Solution helps maintain electrode performance and should be utilized after measurements and prior to recalibration. Treatment should be applied until discoloration.

Manufacturer:  Mettler Toledo™ 51350102

Catalog No. 01-914-476

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The pH electrode is the main actor of pH measurement. It requires special care and attention. The removal of contamination is required before the electrode can be re-calibrated and used for another measurement. Rinsing with deionized water is not sufficient when silver sulfide contamination is present; Thiourea is recommended in this case.

  • Available in a handy screw-cap bottle with a no-fuss label
  • SDS and label contain information according to GHS (Globally Harmonized System)
  • Treatment time is approximately 1 hour


Cleaning solution Thiourea, 250mL
Completely miscible in water
Thiourea/thiocarbamide (5–10%) and HCl
pH Electrode
For Cleaning Junctions with Silver Sulfide Contamination
250 mL
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