"An unstable substance that every ethical scientist in the galaxy has denounced as dangerously unpredictable."

He searched for ways of obtaining cyclobutadiene, while explaining the chemistry of this unstable substance and isolating its dimers.

Essential for rock blasting at the Kuchunga site, the unstable substance has been rigged to explode from atmospheric pressure drops at high altitude.

That's a very rare and unstable substance.

These various micro-climates are influenced by the magical phenomenon known as Mist, an unstable substance with the ability to cause great variation over small areas.

And what it perspires is pure nitroglycerin, one of the world's great unstable substances.

"It's a light, elastic, highly unstable substance most commonly used as a detonation factor in explosives."

A major obstacle was that they were dealing with an unstable substance that often lost activity when concentrated.

Contrarily, a kinetically unstable substance is said to be "labile."

The major premise of the book is matter is an inherently unstable substance and slowly transforms into luminiferous ether.