Formaldehyde Testing

Formaldehyde is a chemical compound that is widely used in industrial manufacturing and a number of other industries. In fabric production, in order to maintain the durability of printing and dyeing, achieve anti-wrinkle and anti-shrink effects, or to improve the hand feel, formaldehyde is added to the additives. Textiles containing formaldehyde will gradually release free formaldehyde when people wear and use them, endangering people’s health. Excessive formaldehyde can irritate the human respiratory system and skin, and may also cause allergic diseases and respiratory infections, especially for pregnant women and children. Formaldehyde content is also one of the important indicators for textile testing.

Controlling the formaldehyde content within the standard requirements, reducing harm to the human body and ensuring consumer safety is the important significance of formaldehyde testing in textiles.

STEMart provides comprehensive formaldehyde testing services to provide inspection reports that meet relevant regulations and international standards, thus proving the quality and safety of textile products.

Test Methods

• Colorimetric method - According to the color developer, it can be divided into the following methods
  • Acetone-acetate method
  • Sulfite fuchsin method
  • Phloroglucinol method
  • Chromotropic acid method
  • Aniline method

• Liquid phase extraction method

The liquid phase extraction method measures the total amount of free formaldehyde in the sample and the free formaldehyde produced after hydrolysis, and examines the damage of free formaldehyde to the human body that may be caused by factors such as sweating or moisture during wearing and use of textiles.

• Vapor phase extraction method

The gas phase extraction method measures the amount of free formaldehyde released by a sample under certain temperature and humidity conditions. It examines the amount of formaldehyde released by textiles during storage, transportation, display and heating, and evaluates the harm to the environment and human body.

Test Items

• Formaldehyde emission

By evaluating the amount of formaldehyde released, we can understand the amount of formaldehyde gas that may be released during the use of textiles and the degree of harm to human health.

• Formaldehyde residue

Chemicals and dyes used in the textile production process may contain formaldehyde, and this unreacted formaldehyde may remain in the finished textile. By detecting the formaldehyde residue, the formaldehyde release of the textile itself can be evaluated.

• Formaldehyde release rate

Different types of textiles, such as clothing, curtains, etc., may release formaldehyde at different rates. By evaluating the rate of formaldehyde release, the safety and stability of textiles can be assessed.

For more information about our formaldehyde testing services, please contact us.