ISO 9306:2023

Overview

ISO 9306:2023 - Traditional Chinese medicine - Ephedra sinica, Ephedra intermedia and Ephedra equisetina herbaceous stem defines international quality and safety requirements for Ephedra herbaceous stem used as natural medicine and Chinese materia medica. The standard covers the dried herbaceous stems of Ephedra sinica, Ephedra intermedia and Ephedra equisetina, and applies to whole medicinal materials and decoction pieces traded internationally.

Key topics and technical requirements

ISO 9306:2023 specifies laboratory and product controls to ensure consistency and safety. Major technical topics include:

• Description and morphology: macroscopic and species-specific morphological features for Ephedra sinica, E. intermedia and E. equisetina.
• Identification methods: macroscopic, microscopic and thin-layer chromatography (TLC) identification (Annex A).
• Chemical marker testing: determination of marker compounds (Annex B describes HPLC‑UV methods).
• Contaminant limits and safety tests:
  • Foreign matter and visible defects
  • Moisture and total ash limits
  • Heavy metals (per ISO 18664)
  • Pesticide residues (per ISO 22258)
• Sampling and test methods: procedures for representative sampling and standard test methods for each requirement (Sections 6–7).
• Packaging, storage and labelling: requirements to preserve quality during transport and sale.
• Test reporting and traceability: reporting format and documentation for conformity assessment.

The document also includes informative annexes on HPLC‑UV determination of marker compounds, international/regional regulatory references (Annex C), and alternative Ephedra species (Annex D).

Practical applications and users

ISO 9306:2023 is a practical tool for ensuring safe, compliant Ephedra herbaceous stem in international trade. Typical users include:

• Regulatory authorities and customs agencies for harmonizing import/export controls.
• Pharmaceutical and herbal product manufacturers for raw material release specifications and supplier qualification.
• Quality control and analytical laboratories implementing TLC, HPLC‑UV and microscopy identification.
• Traditional Chinese medicine (TCM) practitioners and dispensaries that source and label decoction pieces.
• Standards bodies and pharmacopoeias seeking alignment with international requirements.

The standard is especially relevant because Ephedra alkaloids (ephedrine, pseudoephedrine) are regulated in multiple jurisdictions; ISO 9306 supports consistent testing and risk management, including consideration of lower-alkaloid alternatives.

Related standards

ISO 9306 references and complements other ISO standards for traditional herbal medicines, including:

• ISO 18664 (heavy metals)
• ISO/TS 21310 (microscopic examination)
• ISO 22217 (storage)
• ISO 22258 (pesticide residues)
• ISO 23723 (general requirements for herbal raw material)

Keywords: ISO 9306:2023, Ephedra herbaceous stem, Ephedra sinica, Ephedra intermedia, Ephedra equisetina, Traditional Chinese medicine, quality and safety, TLC, HPLC‑UV, heavy metals, pesticide residues.