Anyone taking a chemistry lab course at Wellesley College must complete the "Chemistry Safety Quiz" in the "Tests & Quizzes" section of the CHEM-Safety Quiz Sakai Site.
Please "join" the Sakai site called, "CHEM-Safety Quiz." (You join a Sakai site by going to your "My Workspace" tab and selecting the "Membership" tab. In this tab, you can click on "joinable sites" and a list of open Sakai sites should appear. Selecting "CHEM-Safety Quiz" will put this Sakai site as a tab on your account.)
Plan to take the Chemistry Safety Quiz AFTER your first lab meeting.
should also review
You are responsible for knowing the location and use of safety equipment
and for understanding the material in Mohrig, Technique 1: Safety.
Most organic compounds are flammable! Remember that the only non-flammable
liquids you will encounter
in organic lab are water,
chloride, chloroform and aqueous solutions. Use extreme caution with
burners and hot plates at all times.
are divided into four main categories:
- NON-FLAMMABLE -
compounds that contain halogens. Examples: methylene chloride, bromobutane.
- usually organic compounds that do not contain halogens. Examples:
acetone, ethyl acetate, ethanol, methanol.
- AQUEOUS: Dilute
aqueous solutions with pH no lower than 5.5 and no higher than 10.5
may be poured down
the drain in the hood
of water to flush aqueous solutions.
- SPECIAL DISPOSAL
- organic or inorganic compounds that require special containers or
marked waste containers are available
in the solvent hood in each organic lab. If
you are in doubt about waste-disposal, re-read your manual and/or ask
for help. The above
categories of waste do not include every possible
chemical (for example, some reagents react violently with water
come prepared for lab and be attentive to specific
instructions given by
your instructors or the lab manual for 'special waste containers.'
lab, you will often make some interesting products. You may save them
for future procedures;
when you leave
something in your tote be sure to LABEL it. When you have
finished with the product,
your instructor will advise you of correct disposal procedures.
skin contact with chemicals; always wear practical clothing to lab. Disposable lab coats are required; one will be supplied to you at the beginning of the semester, and a storage area will be set aside for your lab coat. It is your responsibility to keep your lab coat for the duration of the semester. Approved safety glasses must be worn in the laboratory and the
instrument area at all times.
and Gloves (written by Thea Sittler '03)
Working with chemicals in the laboratory can expose you
to various toxins. While many of the chemicals are
in the quantities
that we work with, exposure to them should be limited.
With several routes of exposure, we need to take multiple
we rarely work
with sharp objects, injection is not likely. Food and
drink are not allowed in the lab, so there is no risk
the hood to
inhalation of vapors or fumes. And finally, we wear
gloves and safety goggles to prevent absorption of chemicals
our hands are the most commonly exposed parts of our bodies through
and spills, it is essential
gloves provided in the laboratories are nitrile rubber
gloves made by Best Manufacturing
Company. This glove provides protection from most
of the chemicals we use in the lab. It is important to
not provide complete protection and chemicals will
eventually permeate the glove. These gloves are meant
to be changed
is spilled on them. They were selected for their
range of protection over
period of time, for their thickness so we maintain
our dexterity, and for their reasonable price but
are intended to be
changed often. (For a complete listing of Best gloves
the permeation for each type of glove go to http://www.chemrest.com.)
remember to protect yourself! Always wear gloves and change them often!
NO EXPERIMENTAL WORK OF
ANY SORT IS TO BE CONDUCTED UNLESS THE INSTRUCTOR IS PRESENT OR UNLESS
SPECIFIC PERMISSION HAS BEEN GIVEN BY THE INSTRUCTOR TO USE CERTAIN INSTRUMENTS
OUTSIDE REGULARLY SCHEDULED LABORATORY TIME.
Chemistry 211 students, the
only experiments that are allowed outside lab time are melting
may do these melting points Monday-Friday between 8 AM and 6
You must have another person with you when doing these experiments.
If a lab is in session, please get the permission of the instructor
doing any melting points.