Registration Dossier
Registration Dossier
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EC number: 206-059-0 | CAS number: 298-14-6
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
The abiotic dissociation products of potassium hydrogencarbonate are common constituents of the influent of sewage treatment plants and not expected to have an intrinsic toxic activity to sludge organisms
Key value for chemical safety assessment
Additional information
Potassium as well as hydrogencarbonate is ubiquitously present in the environment, occurring naturally in minerals, soils and sediments, natural waters (oceans, lakes, rivers), biota and human beings and also in sewage. Therefore, the abiotic dissociation products of potassium hydrogencarbonate are common constituents of the influent of sewage treatment plants and not expected to have an intrinsic toxic activity to sludge organisms.
Potassium hydrogencarbonate is an alkaline substance, which dissociates completely to form potassium cations (K+) and inorganic carbon. Depending on pH the species CO2, HCO3-and CO32- will be present in sewage influent waters.Thus HCO3- (pKa= 10.33) is the most important species for the buffer capacity of natural waters. Therefore the pH will remain within environmentally expected ranges of 6 and 10.
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