The International Organization for Standardization (ISO) standard "ISO 14184-1 Textiles - Determination of formaldehyde - Part 1: Free and hydrolyzed formaldehyde (water extraction method)" describes a method for determining the content of free formaldehyde and formaldehyde partially removed by hydrolysis by the water extraction method. This method is applicable to the testing of textile samples in any form.
The procedure is designed for use in the range of free and hydrolyzed formaldehyde on fabric, determined by this method, between 16 mg/kg and 3,500 mg/kg. The lower limit is 16 mg/kg. Below this limit, the result is reported as "not detectable." A method for determining released formaldehyde is included in ISO 14184-2.
In principle, formaldehyde is removed from a textile sample using water at 40°C. The amount of formaldehyde is then determined colorimetrically.
To begin testing, prepare a formaldehyde stock solution of approximately 1500 mg/L by diluting 3,8 ml of formaldehyde solution to 1 liter with water. The formaldehyde concentration in the stock solution is determined using the standard method provided in the appendix to this standard (Appendix A). The correct concentration of this standard stock solution is recorded. This stock solution is stable for up to 4 weeks and is used to prepare standard dilutions.
For dilution purposes, the equivalent concentrations of formaldehyde in the test sample, based on a mass of 1 g of test sample and 100 ml of water, should be 100 times the correct concentration of the standard solutions. When preparing the standard solution, 10 ml of the titrated standard solution (containing 1,5 mg/ml formaldehyde), prepared as above, is diluted to 200 ml with water in a volumetric flask. This solution contains 75 mg/L formaldehyde. When preparing calibration solutions, prepare calibration solutions by diluting the standard solution with water using at least five solutions of those given in the standard.
The test sample is not conditioned because the pre-drying and moisture associated with conditioning can cause changes in the sample's formaldehyde content. Before testing, the sample is stored in a container. This can be done in a polyethylene bag wrapped in aluminum foil. This storage precaution is taken because formaldehyde can diffuse through the pores of the bag. Furthermore, catalysts or other compounds present in the finished, unwashed fabric may react with the foil if in direct contact. Two test samples are cut into small pieces from the sample, and approximately 1 g of the pieces are weighed to an accuracy of 10 mg. If the formaldehyde content is low, the test sample mass is increased to 2,5 g to achieve sufficient accuracy. For each test sample, the weighed pieces are placed in a 250 ml stoppered bottle and 100 ml of water is added. The sample is tightly capped and placed in a water bath at 40°C plus/minus 2°C for 60 minutes plus/minus 5 minutes. The bottle is shaken at least every 5 minutes, ensuring that the samples are completely wetted. The solution is then filtered through a filter into another bottle.
If completely wet samples are difficult to obtain, a mechanically agitated water bath should be used. In cases of disagreement, a conditioned parallel sample is used to calculate a correction factor to correct the mass of the test sample to be used for testing. The test sample is cut from the sample and reweighed immediately after conditioning (in accordance with ISO 139). Using these values, the correction factor is calculated to two integers, and the factor is used to calculate the conditioned mass of the test sample used for the sample solution.
Formaldehyde is a widely used chemical in the textile industry due to its ability to improve wrinkle resistance and dimensional stability. However, potential health risks, such as skin irritation, respiratory problems, and even carcinogenicity, have led to strict regulations regarding its use in consumer products. ISO 14184-1 is an international standard developed to address this concern and provides a reliable method for determining the formaldehyde content in textiles. This method measures the amount of free and hydrolyzed formaldehyde released from textiles under mild conditions. This method is particularly important for:
This standard applies to all types of textile products. It is primarily used for quality control, product certification, and ensuring compliance with formaldehyde limits set by national and international legal regulations.
Mainly the ISO 14184-1 standard test method includes:
Results are reported as milligrams of formaldehyde per kilogram of fabric (mg/kg).
Regulators and consumers are increasingly concerned about chemical safety. Compliance with the ISO 14184-1 standard helps:
As a result, the ISO 14184-1 standard is a key standard in the textile industry, providing a consistent and accurate method for assessing formaldehyde content. As sustainability and safety become central to textile production, compliance with these standards is not only a legal requirement but also a sign of responsible production.
Our organization, which has been supporting businesses across all sectors for years through a wide range of testing, measurement, analysis, and evaluation activities, boasts a strong team of employees who closely follow global developments in science and technology and are constantly improving themselves. In this context, we also provide testing services in accordance with the "ISO 14184-1 Textiles - Determination of Formaldehyde - Part 1: Free and hydrolyzed formaldehyde (water extraction method)" standard.
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