Chemical chelate

Low or high pH Dissolved metals Organic compounds Waste chemicals Chelating agents... 

Some TCA masks have been presented as chelated TCA. Chelation is a medical therapy that aims to detoxify the body of harmful minerals and metals. Chemically, chelation is the process by which an organic substance (the chelator) binds metal ions (iron, copper, lead, calcium, etc.) into inactive, non-toxic and water-soluble complexes that are easily eliminated in the urine. Intravenous chelation therapy (e.g. with ethylenediamine tetra acetic acid, EDTA) is often used to treat poisoning with heavy metals, including lead. The use of the term chelation therefore seems inappropriate as far as TCA is concerned, and has no chemical basis since TCA is not a metal. The little information available states that chelation reduces the speed of penetration of TCA and therefore its depth of action. Might what we call chelation be partial inactivation of the TCA The directions of use for Accu Peel state that a process called chelation allows the TCA to reach an even depth at the same time as using lower concentrations of TCA . Might chelation, on the contrary, be a process that activates the TCA But how can TCA be activated ... 

Once in the brain, lead cannot be removed by chemical chelating agents of the sort that Roberto received. This means that even after the lead levels in blood have been decreased by chelation therapy to apparently insignificant... 

There are cases of metal ion adsorption on solid extractant surfaces where the rate of chemical chelation or ion exchange is the rate determining process. Under these conditions, it is useful to develop a kinetic model to describe this rate process for use in design equations. The kinetic processes are similar to chemical catalytic reactions and also may include electrostatic effects [31]. 

The Ca(Il) coaceatratioa ia blood is closely coatroUed aormal values He betweea 2.1 and 2.6 mmol/L (8.5—10.4 mg/dL) of semm (21). The free calcium ion concentration is near 1.2 mmol/L the rest is chelated with blood proteias or, to a lesser extent, with citrate. It is the free Ca(Il) ia the semm that determines the calcium balance with the tissues. The mineral phase of bone is essentially ia chemical equiUbrium with calcium and phosphate ions present ia blood semm, and bone cells can easily promote either the deposition or dissolution of the mineral phase by localized changes ia pH or chelating... 

Eor the many details of constmcting or interpreting stmctures and systematic names, the Hterature on nomenclature and indexing (6) can be consulted. Systematic nomenclature is illustrated by the Chemicaly hstracts name of the sodium iron(III) EHPG chelate sodium [[N,N -l,2-ethanediylbis[2-(2-hydroxyphenyl)glyciQatol]](4-)-N,N, 0,0, 0, 0 ]ferrate(l-) [16455-61-1], The ferrate anion (12) [20250-28-6] and the potassium salt [22569-56-8] are also Hsted ia Chemical Abstracts (7). 

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