This European Standard specifies a test method for the determination of the resistance of protective clothing, gloves and footwear materials to permeation by potentially hazardous gaseous chemicals under the condition of continuous contact. This test method is applicable to the assessment of protection against gazeous chemicals that can be collected only by liquid or gaseous collecting media. This test method is not adapted for the assessment of gaseous chemical mixtures. This test method describes the modifications to EN 16523 1 necessary to test against gaseous chemicals that can be collected by liquid or gaseous collecting media.