Overview - ISO 9299:2024 (Curcuma longa rhizome)
ISO 9299:2024 specifies quality and safety requirements for cultivated Curcuma longa rhizome (turmeric rhizome) used as a natural medicine in international trade, including Chinese materia medica (whole medicinal materials) and decoction pieces. The standard covers identification, sampling, test methods, limits for chemical and physical markers, and requirements for packaging, storage and labelling to support safe, consistent supply chains for traditional Chinese medicine (TCM) products.
Key topics and technical requirements
- Scope and definitions: Applies to dried, primary-processed Curcuma longa rhizome; primary processing includes removing rootlets, washing, boiling/steaming and drying (≤55 °C).
- Identification:
- Macroscopic features: shape, surface colour (deep yellow to yellowish brown), odour (fragrant) and taste (bitter, pungent).
- Microscopic features: cork, vascular bundles, endodermis and stele structure.
- Thin-layer chromatography (TLC) fingerprinting for extract identification.
- Marker compounds: Determination of curcuminoids such as bisdemethoxycurcumin, curcumin, and demethoxycurcumin.
- Quantitative quality thresholds (examples from the standard):
- Essential oil: ≥ 4.0% (mass fraction)
- Ethanol‑soluble extractive: ≥ 6.0%
- Total ash: ≤ 8.0%
- Acid-insoluble ash: ≤ 1.0%
- Moisture / loss on drying: moisture ≤ 12.0% (azeotropic) or loss on drying ≤ 17.0%
- Safety-related tests and limits: heavy metals, pesticide residues, sulfur dioxide, aflatoxins and foreign matter - with referenced ISO methods for testing.
- Sampling, test methods and reporting: Standardized procedures for representative sampling, laboratory testing and test reports.
- Ancillary guidance: Informative annexes include TLC identification, total curcuminoid determination, national/regional requirement references, and examples of traditional grading.
Practical applications - who uses ISO 9299:2024
- Herbal raw material producers and cultivators standardizing harvest and primary processing.
- Quality control and analytical laboratories performing identification and quantitative assays (TLC, curcuminoids, essential oil, ash, moisture, contaminants).
- Manufacturers of TCM products and nutraceuticals ensuring ingredient compliance for international trade.
- Regulators, import/export inspectors and purchasers verifying safety and labelling.
- Standards developers and pharmacopeia committees aligning national requirements with an international benchmark.
Related standards (selected)
- ISO 18664 - Determination of heavy metals in herbal medicines
- ISO/TS 21310 - Microscopic examination of medicinal herbs
- ISO 21371 - Labelling requirements for TCM products
- ISO 22217 / 22258 / 22283 / 22590 - Storage, pesticide, aflatoxin and sulfur dioxide test methods
- ISO 23723 - General requirements for herbal raw material and materia medica
ISO 9299:2024 provides a practical, science-based framework to harmonize quality and safety for Curcuma longa rhizome in global commerce, supporting traceability, analytical consistency and regulatory compliance.