4. Make sure that all containers are properly
labeled. Never fill a container with material other than that in-
dicated on the label.
Keep bottles of acid or alkalis on low shelves
Use a pyrex or equivalent container when diluting
bases, the heat generated when making base solutions
may break ordinary glassware. Pour the base into the
water. Never use cracked or broken glassware for any
purpose. Always wear goggles when preparing and han-
dling base solutions. If bases come in contact with
the skin or eyes, rinse immediately with large amounts
of water for at least 15 minutes and seek medical at-
tention particular for base splashes involving the
eyes. Under no circumstances should any acid solu-
tion be applied to the area where the base contacted.
(f) Caps (or Stoppers).
Hold the cap in the hand when pouring a sample from
a container; never place it on a bench or worktable
where it could become contaminated. Be sure to
return the cap to the contaner from which it was
removed. Hold the cap of a reagent bottle between
the fingers of the pouring hand when pouring from
the bottle; never lay it on a surface that might be
touched by personnel or their clothing.
Keep acid and caustic bottles tightly stoppered.
Flush and dry the outside of the bottles before
returning them to the reagent shelf. Wipe up any
(g) Excess Chemicals or Reagents.
Never return excess chemicals, reagents, or samples
to the original container. Similarly, do not place
spatulas or other objects in reagent containers for
(h) Gas Cylinders.