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Indian J Dermatol Venereol Leprol. 2004 Nov-Dec;70(6):342-4.

Detection of formaldehyde in textiles by chromotropic acid method.

Author information

1
Department of Skin and STD, Kasturba Medical College and Hospital, Manipal, India.

Abstract

BACKGROUND:

The common causes of textile dermatitis are formaldehyde resins and disperse dyes. There are various methods to detect the presence of formaldehyde in clothing.

AIM:

To detect the presence of formaldehyde in various types of textiles by the chromotropic acid method and to assess the effect of washing on the formaldehyde content.

METHODS:

Twenty randomly selected textiles from a local cloth store were tested for formaldehyde by the chromotropic acid method. A purple ring indicated a positive reaction. The intensity of the purple ring was graded from 1+ to 3+ and reassessed after washing the clothes.

RESULTS:

Eleven out of the 20 textiles tested positive for formaldehyde. The fully synthetic clothes were free from formaldehyde. After the first and second washes the majority did not show a reduction in the formaldehyde content.

CONCLUSIONS:

This is a simple and rapid test which can be used in the practical management of patients with textile allergy. Washing the clothes may not have an effect on the formaldehyde content.

PMID:
17642659
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