Ifmaterials are transferred into other containers, the employer mustensure that these are labeled as well, unless they fall under theportable container exemption (paragraph f(7)). In terms of labelingsystems, you can choose to use the labels provided by your supplierson the containers.
Confidence votes 178. Iodine is often called a mordant when used in the gram stain. What its function is, is to form large crystals with the Crystal Violet dye used as the first stain.
Report Abuse. 1  It prevents the crystal violet from leaving the gram-positive cells. 2  Purpose Of Mordant. 3  The mordent is the iodine, and it serves to prevent the crystal violet from leaving the cell wall of gram positive bacteria.  It allows the stain to stick to the bacteria.