Can I take an examination of the establishment of chemistry teachers in Zhangjiagang after graduating from environmental major?

Of course. According to the Interim Measures for Inquiry of Teacher Qualification Examination, as long as the academic qualifications meet the requirements and there are no professional restrictions, you can directly apply for chemistry teacher qualifications (junior high school or senior high school). As long as you sign up for the chemistry teacher qualification examination and pass the examination to obtain the chemistry teacher qualification certificate, you can go to Zhangjiagang to teach after taking the teacher recruitment examination.