This is probably the most common question we get and the answer is right out of the OSHA.org webpage. We’ve included the reference link to OSHA’s Frequently Asked Questions: Hazard Communication (HAZCOM). Lots of really useful information there, have a look.
(M)SDSs that represent non-hazardous chemicals are not covered by the HCS. Paragraph 29 CFR 1910.1200(g)(8) of the standard requires that "the employer shall maintain in the workplace copies of the required (M)SDSs for each hazardous chemical, and shall ensure that they are readily accessible during each work shift to employees when they are in their workarea(s)." OSHA does not require nor encourage employers to maintain (M)SDSs for non-hazardous chemicals. Consequently, an employer is free to discard (M)SDSs for non-hazardous chemicals.
More information and/ or source: https://www.osha.gov/html/faq-hazcom.html#faq9