Priority Existing Chemical assessments

A priority existing chemical (PEC) is an industrial chemical that has been identified as requiring an assessment because there are reasonable grounds for believing that manufacturing, handling, storing, using or disposing of the chemical could be a risk to health and/or the environment.

Following a chemical assessment by NICNAS, there could be changes in circumstances that would later require particular aspects of a chemical to be re-assessed. This process is called secondary notification and assessment.

Read more about priority existing chemicals

Most PEC assessments are accompanied by an easy-to-understand fact sheet which summarises key recommendations for a non-scientific audience.

List of PECs

The assessments are in alphabetical order by chemical or trade name. Click on a letter in the list or use the page links. A name that begins with a number can be found in 1,2,3...

Chemical/trade name: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 1,2,3...

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Click on the chemical/trade name to download the scientific assessment.


Hexabromocyclododecane (HBCD) - PEC34 [WORD 977 KB]

CAS number(s): 25637-99-4, 3194-55-6

Published 1 June 2012

Hexabromocyclododecane (HBCD) was declared a priority existing chemical for a full assessment on 7 June 2005 (PEC/34). HBCD is one of a number of polybrominated flame retardants (PBFRs) and there was concern over the widespread use in household and industrial situations.

For a summary of the assessment read the Hexabromocyclododecane fact sheet.


Hydrofluoric acid - PEC19 [WORD 7 MB]

CAS number(s): 7664-39-3

Published 1 June 2001

Hydrofluoric acid (hydrogen fluoride) was declared a priority existing chemical for preliminary assessment on 7 April 1998 (PEC/19) due to concern about the chemical’s high toxicity and general availability. The focus of the assessment was on use and exposure in Australia.

For a summary of the assessment read the Hydrofluoric acid fact sheet.

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Last update 19 September 2019