Date Wed, 07/01/2015 - 00:00 Inquiry For Option 2, Air Testing, can ISO 16000-4 be used to test for formaldehyde? Ruling Yes, ISO 16000-4 is an acceptable test method for formaldehyde. Internationally Applicable Off Campus Applicable Off Credits EQc4 EQc4 EQc4 EQc4 EQc4 EQc4 EQc4 EQc4 EQc4 EQc4