As a student with a B.S. degree in Chemical Engineering, you are a qualified applicant for our Ph.D. program. We do not require applicants to have a MS degree to obtain admission to our program. However, the two degrees are quite different and emphasize a different learning path and perhaps a different career path. The answer to which degree is right for you takes into consideration many more things than what can be put on an FAQ page. We recommend reaching out to trusted faculty advisors at your current institution for help with this.