OEKO-TEX Article Numbers Covering One Construction and Not Its Sister
An OEKO-TEX certificate scope covers only explicitly listed article descriptions, leaving chemically modified sister constructions uncertified without separate testing.
ISO 23161
Analytical Method
Analytical testing methodologies designed to determine the concentration of organotin compounds in textile products are defined by global technical specifications. Laboratories use the ISO 23161 protocol to identify and quantify restricted biocides and plastic stabilizers in raw materials and finished goods. This procedure protects consumer health by ensuring that garments do not contain hazardous chemical residues.
Chemical Target
Specific focus is placed on detecting organotin compounds used as catalysts in polyurethane coatings. These chemicals can migrate from the fabric and harm health.
Lab Procedure
Textile samples are extracted using organic solvents and then analyzed using gas chromatography coupled with mass spectrometry. This apparatus separates the compounds by molecular weight and measures their distinct signal patterns. Calibration curves derived from known standards ensure precise measurement down to fractions of a milligram per kilogram.
Safety Limit
Compliance standards set by international brands and restricted substance lists require organotin concentrations to remain below one milligram per kilogram of textile material. Any test result exceeding this threshold requires the fabric lot to be rejected and disposed of safely. This strict restriction is monitored through routine testing at independent facilities to guarantee compliance before any bulk materials are approved for cutting and sewing.