Grant given for work-related research expenses-- taxable income?

I am a graduate student at a large research institution. Last year, I received a small research grant to cover the cost of laboratory supplies for my research work. The grant conditions indicate that these funds cannot be used as salary, i.e. they are not a payment for services provided.  The grant is not compensation for teaching/research as a graduate student. If I had not received these funds, my employer would have paid for the same items to conduct the work. The supplies it paid for are necessary for me to complete my graduate degree. It does not seem to me like this should be taxable income.

However, I was issued a 1099-MISC form for this research grant. Putting in the 1099-MISC form indicates that I owe a substantial amount of taxes on this (>20% of the total research grant amount). The closest question I can find in the  TurboTax 1099-MISC section entry to describe this situation is "I was in a research study, and this was the payment". This still makes it seem like this grant was compensation. 

 

Any help about how to report? Is this really taxable?