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.
Gram's iodine - fixes the stain in gram positive bacteria Ethanol or acetone - washes the stain from gram negative bacteria Safranin - counterstain, will restain gram negative bacteria while not interfering with the previous stain in gram positive bacteria The mechanism is as follows, gram positive bacterial membrane pores shrink in response to the ethanol or acetone and prevent the stain from being washed.