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.


ortho-Dichlorobenzene - PEC14 [WORD 475 KB]

CAS number(s): 95-50-1; Benzene, 1,2-dichloro-

Published 1 February 2001

ortho-Dichlorobenzene (ortho-DCB) was declared a priority existing chemical for full assessment on the 7 April 1998 (PEC/14). The declaration of ortho-DCB was in response to health and environmental concerns due to its widespread use as a degreasing agent. Industrial uses in Australia include formulations as paint removers, as a degreaser (for grease traps, drains and automotive parts) and as a decarboniser in the automotive and marine industries.

For a summary of the assessment read the o-DCB fact sheet.

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Last update 29 July 2018