ISO 16373-3:2014

Overview

ISO 16373-3:2014 - Textiles - Dyestuffs - Part 3 specifies a laboratory method for the detection and quantitative determination of certain carcinogenic dyestuffs in dyed, printed or coated textile products. The standard uses an extraction solvent of triethylamine/methanol and chromatographic analysis (HPLC-DAD or HPLC-MSD) to identify and quantify target dyestuffs extracted from textile specimens.

Key topics and technical requirements

• Scope: Applies to dyed, printed or coated textile articles for the listed carcinogenic dyestuffs (examples include Basic Red 9, Disperse Orange 11, Disperse Yellow 3, Acid Red 114 - see Table 1 of the standard for the full list).
• Extraction method: Use 0.25% triethylamine in methanol; ultrasonic extraction at 50 °C (±2 °C) for 3 hours on a specimen ≤1.0 g. Optional hexane cleansing for grease/oil removal.
• Sample concentration & preparation: Evaporate extract (rotary evaporator at ~40 °C), reconstitute residue in 1 ml methanol, filter (0.45 μm PTFE) and dilute if necessary.
• Chromatographic analysis: HPLC with diode-array detector (HPLC-DAD) or mass spectrometer (HPLC-MSD). Annex A provides validated HPLC/DAD parameters (e.g., Inertsil ODS-3 column, 0.8 ml/min flow, ammonium acetate/acetonitrile eluents, injection 5 μl) and recommended detection wavelengths for specific dyes.
• Calibration & quantification: Use at least four calibration points (recommended 1–100 μg/ml range); linear correlation coefficient ≥ 0.99. Results expressed as mass fraction (μg/g).
• Safety: Target dyestuffs are known or suspected carcinogens - follow national health & safety regulations and good laboratory practice.
• Test report elements: Reference to ISO 16373-3, specimen details, methods used, results (levels and detection limits in μg/g), and any procedural deviations.

Practical applications and users

ISO 16373-3 is intended for:

• Textile testing laboratories performing compliance or investigative testing
• Regulatory bodies enforcing bans or limits on carcinogenic dyestuffs
• Manufacturers, importers and retailers conducting product safety and supplier audits
• Quality assurance teams and forensic analysts handling dye-related safety incidents

Common use cases include regulatory compliance testing, pre-shipment quality control, supplier verification, safety assessments, and root-cause analysis following recalls.

Related standards

• ISO 16373-1 - General principles of testing coloured textiles for dyestuff identification
• ISO 16373-2 - General method for determination of extractable dyestuffs (pyridine-water extraction) These parts together support comprehensive dyestuff identification and quantification strategies for textile safety and regulatory compliance.

Keywords: ISO 16373-3:2014, textiles dyestuffs, carcinogenic dyestuffs, triethylamine methanol, HPLC-DAD, HPLC-MSD, extraction, chromatographic analysis, textile testing, regulatory compliance.