Tetraethylammonium hydroxide, in the form of an aqueous solution containing: <br><br><br>- 35 % (± 0,5 %) by weight of tetraethylammonium hydroxide, <br> <br><br><br>- not more than 1 000 mg/kg of chloride, <br> <br><br><br>- not more than 2 mg/kg of iron and <br> <br><br><br>- not more than 10 mg/kg of potassium
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