... overseas. Puyang Tiancheng Chemical co.,ltd has been in business for over 15 years, with a large number of customers all ... produce formic acid.1,Application fields of formic acid:a, pharmaceutical industry: Caffeine,Enzinnes,Aminopyrine,Vitamine B1.b,Pesticide industry:Triazolone,Disinfest.c,Chemical industry:Tanningd,Textile industry:Natural ...