ChemIT Main Office 8-5493 The ChemIT office is located in CHM 116 in the Chem ’73 building of the Chemistry complex, a 250,000 square foot research center that is home to some of the world’s most eminent scientists. The main entrance is on the corner of 231 South 34th Street, Philadelphia, PA 19104. Packages and deliveries should be directed to 250 South 33rd Street, Philadelphia PA 19104. You can contact us at 215-898-5493 or email the ChemIT support team at