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Drinking water quality standards describes the quality parameters set for drinking water. Water may contain many harmful constituents, yet there are no universally recognized and accepted international standards for drinking water. Even where standards do exist, the permitted concentration of individual constituents may vary by as much as ten ...
Maximum contaminant levels (MCLs) are standards that are set by the United States Environmental Protection Agency (EPA) for drinking water quality. [ 1 ] [ 2 ] An MCL is the legal threshold limit on the amount of a substance that is allowed in public water systems under the Safe Drinking Water Act (SDWA).
Lithium metaborate is a chemical compound of lithium, boron, and oxygen with elemental formula LiBO 2. It is often encountered as a hydrate , LiBO 2 · n H 2 O , where n is usually 2 or 4. However, these formulas do not describe the actual structure of the solids.
Ball-and-stick model of the tetrahydroborate anion, [BH 4] −. Borohydride refers to the anion [B H 4] −, which is also called tetrahydridoborate, and its salts. [1] Borohydride or hydroborate is also the term used for compounds containing [BH 4−n X n] −, where n is an integer from 0 to 3, for example cyanoborohydride or cyanotrihydroborate [BH 3 (CN)] − and triethylborohydride or ...
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The anion is tetrahedral with B-C bond lengths of approximately 1.65 Angstroms. The salt has only been obtained as the etherate, and the crystallography confirms that four ether (OEt 2) molecules are bound to the lithium cation, with Li-O bond lengths of approximately 1.95 Å.
A metaborate is a borate anion consisting of boron and oxygen, with empirical formula BO − 2. Metaborate also refers to any salt or ester of such anion (e.g. salts such as sodium metaborate NaBO 2 or calcium metaborate Ca(BO 2) 2, and esters such as methyl metaborate CH 3 BO 2). Metaborate is one of the boron's oxyanions.
Triethylborane (TEB), also called triethylboron, is an organoborane (a compound with a B–C bond). It is a colorless pyrophoric liquid. Its chemical formula is (CH 3 CH 2) 3 B or (C 2 H 5) 3 B, abbreviated Et 3 B. It is soluble in organic solvents tetrahydrofuran and hexane.