ISO 20809:2017 pdf download – Essential oil of cypress (Cupressus sempervirens L.). 1 Scope This document specifies certain characteristics of the essential oil of cypress (Cupressus sempervirens L.) in order to facilitate assessment of its quality. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO/TS 210, Essential oils — General rules for packaging, conditioning and storage ISO/TS 211,...