DanYang HengAn Chemical Co., Ltd. is the professional manufacturer and supplier of pyridine series, including bromopyridine series, chloropyridine series, Pyridinecarboxaldehyde series, aminopyridine series, pyridine boronic acid series. With 11 years in pyridine derivatives production and marketing Hachem has a fruitful relationship with many domestic laboratories. Customers needs are our focus. Generally, our technicians can give you a definite reply within 2 working days.