Chemistry & Environmental Dictionary

Label - Liquid


A warning notice required to be placed on a package of hazardous materials by the USDOT, IATA and other regulatory agencies when shipping a package by air, highway, rail or water. Labels are akin to placards except that they are used on individual packages and are typically 4" on each side. More information

Lanthanides (rare earth metals)

The fourteen elements of the upper row on the inner-transition metals on the periodic table that follow the element lanthanum (#57). Some reference sources include lanthanum in this series others do not. For all of these elements the filling orbital is 4f. This series is a sub-series of the transition metals.

LDPE (Low Density Polyethylene)

This structure is similar to high density polyethylene except that it is a less rigid and less dense form of the molecule.


An amorphous (non-crystalline) form of matter between a gas and a solid that has a definite volume, but no definite shape.

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