hexavalent
1
9.6
- adjective
- /ˌhɛksəˈveɪlənt/
- Specialized
- Compounds that are hexavalent, like hexavalent chromium, can bond with six other atoms.
- hexavalent chromium
Examples
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The soldiers' experts will testify how even brief exposures to hexavalent chromium can cause serious and often unseen health problems, among them one that an expert calls "genetic transformation injury."
Blog text (8) -
This site was used to store waste oil and was contaminated with hexavalent chromium, lead, polychlorinated biphenyls (PCB), and organic wastes.
Academic text (1995) -
But, under questioning, he also said that every person is exposed to small amounts of hexavalent chromium in their daily lives.
Blog text (16) -
And you say that this stuff, this hexavalent chromium.... -Well, it's poisonous.
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But the toxicologist that I've been talking to... ...gave me a list of problems that come from hexavalent chromium exposure.
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Sodium dichromate contains a carcinogen called hexavalent chromium.
Blog text (8) -
First, a reagent was mixed into the soil that was formulated to reduce the mobility of the hexavalent chromium and the lead.
Academic text (1995) -
PG&E's own technicians documented toxic levels of hexavalent chromium in those test wells on numerous occasions.
Fiction book (2000) -
A notice of intent to list chromium or hexavalent chromium under section 112 was as far as the EPA ever moved to regulate that chemical.
Academic text (2001) -
Carson has said that he subscribes to a "no-threshold" model of exposure to hexavalent chromium, saying that any exposure to the chemical causes an unseen "genetic transformation injury" that increases the risk of developing cancer.
Blog text (16)
Synonyms
1
9.1
Able to form different bonds with other atoms
1
9.6
Able to form more than one kind of chemical bond
Surface Forms
Morphology
hexavalent = valent (transparent) = hexa + valent
The prefix 'hexa-' clearly indicates six, and 'valent' relates to valence, making the meaning straightforward.
Etymology
Hexavalent comes from hexa- 'six' (as in hexagon) and valent 'having the power or ability to join'. So a hexavalent compound is one that can form six chemical bonds, which is why hexavalent chromium must be handled carefully.