hexavalent

American  

[hek-suh-vey-luhnt] / ˈhɛk səˌveɪ lənt /

adjective

Chemistry.

1. having a valence of six.

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hexavalent British  

/ ˌhɛksəˈveɪlənt /

adjective

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

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Etymology

Origin of hexavalent

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

Example Sentences

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.

From Los Angeles Times

Paramount is home to dozens of metal-related businesses, which have historically contributed to some of the state’s highest concentrations of hexavalent chromium, including a spike of 26 nanograms per cubic meter in late October 2016.

From Los Angeles Times

The air district initially launched a community air monitoring network for hexavalent chromium and other toxic air contaminants in Paramount in 2013, after residents complained about metallic odors near a metal forging and grinding operation.

From Los Angeles Times

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.

From Los Angeles Times

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

From Los Angeles Times