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_{(This answer supposed the OP is an American; which turns out to be true, but they are attending school in Canada, so while the general thrust of the answer remains valid some of the US-specific aspects are obviously not immediately relevant)}

Phobias can potentially fall under mental disabilities, which may then subsequently be covered and protected by the Americans with Disabilities Act (this would be determined by the particulars of your case). I suggest contacting your university's disability office for help and guidance.

First of all, you should look for professional help. If this phobia affects your life, and it sounds like it does, you should try to work on it. For most phobias, there are very good behaviour therapy approaches available which help you dealing with your phobia. Please look for a therapist!

One practical thing you can do is writing an e-mail to the course instructor asking what kind of chemicals you are about to use within the course and check out how dangerous they are.

I realize that rational arguments do not help phobias. Dealing with a phobia will require therapy as suggested by the other answers.

Sometimes understanding better the things you fear can help you cope with the fear. Sometimes not. If this is a case where understanding might help, you should realize that pretty much everything is a chemical (the only tangible exception I can think of is light). You are made of many different chemicals (water, salts, sugars, fats, minerals, polypeptides, polynucleotides). Everything you touch, eat, smell, and taste is made up of chemicals. You might argue: "Sure, but those are natural chemicals. I have a fear of artificial chemicals." My response to this is that natural and artificial have no clear definitions. Many chemicals made industrially can be found in nature and in living things. Many natural compounds (including things you can find in the woods, such as mushrooms) can be as hazardous as any cleaning agents that you have. The most toxic compound (in nanograms of toxin per kilogram of body weight), botulinum toxin, is natural.

An important guideline in toxicology is: the dose makes the poison. For instance, carbon monoxide and hydrogen sulfide are well-known to be "toxic chemicals" and exposure can be fatal. However, your body produces both of these chemicals in small quantities as a normal part of metabolism. Despite its toxicity in relatively large doses, your body produces hydrogen sulfide to send signals and it plays an important role in blood flow. Your body is perfectly capable of detoxifying small amounts of many "toxic" compounds and does this all the time as a normal part of metabolism.

Since you are interested in science, I heartily recommend that you study chemistry and toxicology. This will allow you to better understand the risks and nuances of toxic substances.

The other answers are mostly great and I would suggest trying what you can from them - especially seeking professional help with your phobia and documentation of it for accommodations.

With that said, one element of a "chemical" phobia is often an understanding that there are a lot of active substances of unknown identity present in what we generally think of as "chemicals" (cleaning products, products and byproducts of industrial processes, etc.) and legitimate concern about an overwhemling range of possibilities of what effects they might have on your body. A low-level chem or bio class probably doesn't have a lot of situations where you have to handle such things (and hopefully you can get accommodations so that you don't have to), but what it does give you is an opportunity to learn about these substances, and (as opposed to commercial cleaning products) to know exactly what you're handling and to have a chance to learn what is and isn't known about how it reacts and what safety concerns there may be around it. This might be an opportunity for you turn take some control, through knowledge, over your phobia, especially if you make a plan to do research (thinking well-cited Wikipedia articles, science texts, and peer-reviewed science papers, not random websites) outside class to get a better understanding for yourself.

I think the other answers have largely covered it, but let me put it all together. I see three main paths forward:

1. Complete the course.

• Some combination of therapy and gloves might help you to get through it


• Consider e-mailing the instructor to better understand what is required


• Perhaps your lab partner would be willing to take the lead in handling the chemicals.

2. Consider a different course. It's not clear if you have any other options.

• A dean would likely approve doing a higher-level course instead of the intro course (e.g., physical chemistry instead of chem, or anatomy instead of bio) even without mentioning your phobia. But, these courses are at a higher level and might not be appropriate for you.


• At many universities, geology, astronomy, or computer science can fulfill a science requirement, so make sure you're correct that it has to be 2 of bio/chem/physics.

3. Seek an accommodation for your phobia.

• If you register your phobia with the disability resource office, your university will have to give you more leeway


• They may be willing to let you do the analysis without actually being present for the labs; or, they may offer dispensation from the requirement to do chem/bio instead of physics

Talk to your professor

As the other answers have said, professional help is important for your overall quality of life. But it's also a long term solution, and you also have to deal with your labs this semester. Talk to your professor about how you can be successful in your current labs while you seek professional help.

Be prepared for your professor to be dismissive of your concerns

While there are many wonderful and empathetic professors out there, not all of them are such, and there's no guarantee that you have one of the good ones. An unfortunately large percentage of the population is dismissive of any emotional stresses that they do not personally feel. As an experienced biologist or chemist, your professor is probably very comfortable with dealing with hazardous chemicals, and may not remember that not everyone feels the same way. On the other hand, they're also a teacher who has likely dealt with all manner of students in the past, and may very well have helped other students with similar phobias to yours in the past.

Hope for the best, but prepare for the worst.

Focus on your reactions to your fear, not the fear itself

The truth of the matter is that many of the chemicals used in labs are hazardous when mishandled. A healthy respect for chemicals is something that most professors are going to want to encourage, not discourage. The problem lies not with your fears, but in how your phobia causes you to react - shaking, holding your breath, making mistakes, etc.

Frame this as a safety issue (which it is) - your phobia makes it unsafe for you to handle chemicals. This moves the discussion away from "how are you mastering your phobia" and "is your fear rational" (which are issues for you and your professional help) and into the realm of "How will you participate in labs safely while you are mastering your phobia." Don't let your professor side track you into a discussion of the whys and hows of your phobia. Focus on the practical effects that your phobia causes, and how those make it dangerous for you to work in the lab.

Also, lab safety is a serious concern, and gives you grounds to escalate the issue if your professor tries to dismiss your concerns. (Not that you wouldn't have grounds anyways, but lab safety gets a lot more respect than mental health, and your escalation is more likely to be taken seriously)

Consider solutions ahead of time

Before you talk to your professor, brainstorm for ways that you might be able to make the class manageable. Maybe you get a lab partner (or two, if the labs are designed for two bodies) who can managed the chemicals while you make observations from a safer distance. Maybe you act as an observer to all the students doing labs, and don't participate yourself. Try and come up with as many possible solutions as you can, and consider how effective you think each one would be, and why.

This will help prepare you to discuss these solutions with your professor, and find one that's workable.

If you do manage to find professional help before the beginning of classes, talk to them about how to best approach your professor - they'll probably have better advice for you than some random person on the internet.

On the flip side, your school probably has some resources to help you find the professional help you need. Your chemistry and bio departments may even have experience with very similar phobias to what you currently face.

As other already say, go to see a doctor for help.

Meanwhile you can try eleventh commandment of work in laboratories: Thou shalt not work without proper protection.

Wear protective gear - lab coat, goggles, mask and nonpowdered nitril gloves. If you aren't sure you can stack them. We do use this trick to be sure our hands won't be contaminated and trust me, there are a much worse things to have on hands than some acids or bases...