Overview
ISO 4154:2022 - Traditional Chinese medicine - Sinomenium acutum stem defines international minimum quality and safety requirements for the dried lianoid stem of Sinomenium acutum (including var. cinereum). The standard applies to raw Chinese materia medica and decoction pieces sold and used as natural medicines in international trade. Its purpose is to harmonize quality control, protect patient safety and support regulatory and commercial consistency for this widely used TCM ingredient.
Key topics and technical requirements
- Identity and description
- Macroscopic and microscopic descriptions (stem morphology, bark, pith, wood rays, epidermis, xylem/phloem features).
- Powder characteristics (color, cell types, calcium oxalate crystals).
- Chemical and analytical identification
- Thin-layer chromatogram (TLC): sample must show spots matching reference solutions.
- Marker compound: sinomenine (C19H23NO4) content not less than 0.50% of dried material when used as the marker.
- Quality limits
- Moisture: mass fraction ≤ 13.0%
- Total ash: mass fraction ≤ 6.0%
- Acid‑insoluble ash: mass fraction ≤ 0.5%
- Safety testing
- Determination of heavy metals (e.g., arsenic, mercury, lead, cadmium).
- Determination of pesticide residues.
- Sampling and test methods
- Sampling per ISO 23723:2021 (Clause 8).
- Test methods reference ISO/TS 21310 (microscopy), ISO 18664 (heavy metals), ISO 22258 (pesticide residues), and other ISO test procedures or informative annexes (moisture, TLC, HPLC-UV for marker compound).
- Packaging, storage, labelling
- Requirements for storage, transport and labelling are included to ensure product integrity in trade.
Applications and practical value
- Manufacturers and processors: set incoming raw material acceptance criteria and validate processing/decoction piece quality.
- Quality control and analytical laboratories: implement standardized test methods (TLC, moisture, ash, heavy metals, pesticide screens, HPLC for sinomenine).
- Regulators and customs/importers: assess compliance of Sinomenium acutum stem in international trade and align national pharmacopoeial requirements.
- Product formulators and TCM companies: ensure consistent sinomenine content and safety profile in proprietary medicines (e.g., anti‑rheumatic preparations).
- Supply chain managers: apply harmonized sampling and storage rules to reduce recalls and adverse events.
Related standards
- ISO 23723:2021 - General requirements for herbal raw material and materia medica (sampling)
- ISO/TS 21310 - Microscopic examination of medicinal herbs
- ISO 18664 - Determination of heavy metals in TCM herbal medicines
- ISO 22258 - Determination of pesticide residues by gas chromatography
- ISO 21371 - Labelling requirements for TCM products
- ISO 22217 - Storage requirements for raw materials and decoction pieces
Keywords: ISO 4154:2022, Sinomenium acutum stem, traditional Chinese medicine, sinomenine, quality and safety requirements, TLC identification, heavy metals, pesticide residues, moisture limit, total ash.