Please review the following Tainachem factory’s Certification of ISO 9001:2015 , ISO 14001:2015 and ISO 45001:2018 , we warmly welcome to visit our factory for our long-term business, if you have any chemicals inquiries, please feel free to contact us by e-mail: sales@haihengpharma.com at any time, we will reply you within 24 hours.