Contact Dermatitis Clinic, Park Nicollet Health System, Minneapolis, Minnesota, USA.
Department of Dermatology, University of Minnesota, Minneapolis, Minnesota, USA.
Contact Dermatitis. 2023 Dec;89(6):484-487. doi: 10.1111/cod.14417. Epub 2023 Sep 14.
Formaldehyde is a common preservative used to prevent microbial growth in water. It can be found in personal care products and household cleaning products, including laundry detergents. Formaldehyde has frequently been recognised as a cause of allergic contact dermatitis, but whether it remains present in textiles washed with formaldehyde-containing laundry detergents is unknown.
This study aimed to utilise the chromotropic acid method (CAM) to assess formaldehyde release from textiles washed with a laundry detergent known to contain formaldehyde.
Textiles were laundered with a detergent containing calcium formate at four concentrations (0×, 0.5×, 1× and 5× the recommended amount per manufacturer label) and kept wet or allowed to dry. Select textiles were subjected to an additional rinse cycle. Textiles were then tested utilising the CAM. A sample of the pure laundry detergent was also tested using the CAM.
The CAM was positive only for wet textiles washed at 5× the recommended concentration of detergent and pure detergent. All dry textiles were negative.
Formaldehyde release was not detected from any textiles washed following the manufacturer's recommendations. Once dry, it is likely safe for formaldehyde-allergic patients to wear textiles washed with formaldehyde-containing detergents.
甲醛是一种常见的防腐剂，用于防止水中的微生物生长。它可以在个人护理产品和家用清洁产品中找到，包括洗衣液。甲醛经常被认为是引起过敏性接触性皮炎的原因，但用含甲醛的洗衣液洗涤的纺织品中是否仍存在甲醛尚不清楚。
本研究旨在利用变色酸法（CAM）评估已知含有甲醛的洗衣液洗涤后的纺织品中甲醛的释放情况。
将纺织品用含有甲酸钙的洗涤剂洗涤，浓度分别为（0×、0.5×、1×和 5×制造商标签上推荐用量），并保持湿润或干燥。选择一些纺织品进行额外的漂洗循环。然后使用 CAM 对纺织品进行测试。还使用 CAM 对纯洗衣液样品进行了测试。
CAM 仅对用推荐浓度的洗涤剂洗涤的 5×湿润纺织品和纯洗涤剂呈阳性。所有干燥的纺织品均为阴性。
按照制造商的建议洗涤后的任何纺织品均未检测到甲醛释放。一旦干燥，对于甲醛过敏的患者来说，穿着用含甲醛洗涤剂洗涤的纺织品是安全的。
