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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: mwilkie on July 03, 2007, 01:20:26 PM

Title: How can you tell if a chemical is a VOC?
Post by: mwilkie on July 03, 2007, 01:20:26 PM

specifically, I am trying to determine if (CAS) 28064-14-4 is a VOC? But also for other chemicals in the future, how can I tell?

Title: Re: How can you tell if a chemical is a VOC?
Post by: DrCMS on July 03, 2007, 02:04:30 PM

The chemical you've given the CAS No for is an epoxy resin made from epichlorohydrin and Bisphenol F so it is not a VOC.

Title: Re: How can you tell if a chemical is a VOC?
Post by: Mr Peanut on July 03, 2007, 06:13:13 PM

With regard to the second part of the question (other chemicals in the future).

Volatile organic compound has many definitions depending on context.

Perhaps your question is related to a regulatory issue. Usually when the question comes up it is in regard to EPA Hazardous Air Pollutants (HAPs) regulations. Frequently the answer is a functional definition (does a sample exhibit the characteristic as defined in a standard method). EPA Method 24 is an example of such a method. When a regulation says determine if a product contains VOCs by EPA Method 24 it means just that (run the test on it).

Alternatively, your question could be one of decision regarding an appropriate analytical method. Specifically, a purge and trap method vs an extraction method. A good rule of thumb here is vapor pressure. Naphthalene is analyzed by both methods and is a good marker for a vapor pressure breakpoint for the two methods.

Anyway, I would need to know more about the context of the question to help more.

good luck

Title: Re: How can you tell if a chemical is a VOC?
Post by: P on July 04, 2007, 06:15:34 AM

BCF advised me that, in Europe or the UK, a raw material in a formulation which is liquid and has a boiling point under 250C is included in the calculation for VOC.