hexavalent

[hek-suh-vey-luhnt]

adjective

Chemistry.

1. having a valence of six.

hexavalent

/ ˌhɛksəˈveɪlənt /

adjective

1. Also: sexivalent. chem having a valency of six

Word History and Origins

Origin of hexavalent¹

First recorded in 1885–90; hexa- + -valent

Example Sentences

Air samples collected Sept. 10-22 in the city of Paramount had “slightly elevated” levels of hexavalent chromium, according to the South Coast Air Quality Management District.

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Hexavalent chromium, commonly known as chrome, is best known for providing shiny, rust-resistant coating to auto parts, aviation components and tools.

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Foundries, which liquefy and cast metals, can release hexavalent chromium during melting, welding and grinding.

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Only dioxins, which come primarily from burning waste materials, are deadlier than airborne hexavalent chromium.

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Investigators allege both foundries in Paramount failed to conduct tests to ensure compliance with hexavalent chromium emission limits, did not properly clean areas near chrome-alloy-melting facilities and operated equipment without necessary permits.

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