AATCC 206-2020 Test Method for Free and Hydrolyzed Formaldehyde: Water Extraction.
4. Safety Precautions NOTE: These safety precautions are for information purposes only. The pre- cautions are ancillary to the testing proce- dures and are not intended to be all inclu- sive. It is the user’s responsibility to use safe and proper techniques in handling materials in this test method. Manufacturers MUST be consulted for specific details such as material safety data sheets and other manufacturer’s recommenda- tions. All OSHA standards and rules must also be consulted and followed.
4.1 Good laboratory practice should be followed. Wear safety glasses in all labo- ratory areas.
4.2 When handling glacial acetic acid to prepare Nash reagent, use chemical goggles or face shield, impervious gloves and an impervious apron during preparation. Concentrated acids should be handled only in an adequately ventilated lab- oratory hood. CAUTION: Always add acid to water.
4.3 Formaldehyde is a carcinogen. Use in an adequately ventilated laboratory hood. Avoid inhalation or skin contact. Use chemical goggles or face shield, impervious gloves and an impervious apron when working with formaldehyde (see 8.1 and 9.1).
4.4 An eyewash/safety shower should be located nearby and a self-contained breathing apparatus should be readily available for emergency use.
4.5 Exposure to chemicals used in this procedure must be controlled at or below levels set by governmental authorities (e.g., Occupational Safety and Health Administration’s [OSHA] permissible exposure limits [PEL] as found in 29 CFR 1910.1000; see www.osha.gov for latest version). In addition, the American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Values (TLVs) comprised of time weighted averages (TLV-TWA), short term exposure limits (TLV-STEL) and ceiling limits (TLV-C) are recommended as a general guide for air contaminant ex- posure which should be met (see 14.3).
5. Uses and Limitations
5.1 The procedure is intended for use in the range of free and hydrolyzed formaldehyde on nonhydrophobic fabric from 20 µg/g up to about 3500 µg/g. This test method approximates hydrolyzed formaldehyde and closely simulates normal user conditions. However, TM206 is an aqueous immersion method and fabrics with a propensity for bleeding could be a concern; if the dye has an absor- bance in the range of 412nm, it could interfere with the spectrophotometric measurement. It is not intended to approximate formaldehyde released un- der hot storage conditions.
5.2 Alternatively, AATCC TM112, Test Method for Formaldehyde Release from Fabric: Sealed Jar (see 14.1), deter- mines free and hydrolyzed formaldehyde and additional formaldehyde as generated under more severe conditions than this test method. The appropriate test should be chosen based on that distinction (see 14.2).AATCC 206 pdf download.