| http://www.w3.org/ns/prov#value | - As common single crystal silicon anisotropic etchants there may be mentioned aqueous sodium hydroxide, aqueous potassium hydroxide, aqueous hydrazine, tetramethyl ammonium hydroxide, mixtures of phenols and amines such as a mixture of pyrocatechol and ethylene diamine with water, and a mixture of potassium hydroxide, n-propanol and water.
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