Exhibit 31.1
CERTIFICATION OF CHIEF EXECUTIVE OFFICER
I, Ken K. Ren, certify that:
1. I have reviewed this Amendment No. 1 to the quarterly report on Form 10-Q of CASI Pharmaceuticals, Inc.;
2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
Date: January 21, 2015
| /s/ Ken K. Ren | |
| Ken K. Ren | |
| Chief Executive Officer |
