Priority Existing Chemical assessments

Last update 30 November 2016

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.

Search assessments

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.


Acrylamide [WORD 5.7 MB]

CAS number(s): 79-06-1

Published 1 May 2002

Acrylamide was declared a priority existing chemical for full assessment on 1 August 2000 (PEC/23), in response to concerns relating to possible human health and environmental hazards associated with the high-volume use of the monomer and widespread use of polyacrylamide products, particularly in effluent and water treatment.

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


Acrylonitrile [WORD 202 KB]

CAS number(s): 107-13-1

Published 1 February 2000

Acrylonitrile was declared a priority existing chemical for preliminary assessment on 7 April 1998 (PEC/10) because of public concern about the health effects of the chemical. Acrylonitrile is used for the manufacture of a polymer, which is further compounded to plastic resins.

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


Alkyl phosphate anti-valve seat recession (AVSR) additive [WORD 510 KB]

CAS number(s): Confidential

Published 1 July 2003

Anti-valve seat recession (AVSR) fuel additives were declared as priority existing chemicals for full assessment on 5 December 2000 (PEC/25). They were nominated because of health and environmental concerns due to their increasingly widespread use in automotive lead replacement petrol (LRP).

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


Ammonium, potassium and sodium persulfate in hairdressing [WORD 1.9 MB]

CAS number(s): 7727-54-0, 7727-21-1, 7775-27-1

Published 1 June 2001

Ammonium, potassium and sodium persulfate were declared priority existing chemicals for full assessment on 7 April 1998 (PEC/18). The declaration was made due to concern about their widespread use as ingredients in bleaches used in the hairdressing industry and the prevalence of skin disease and asthma in that profession. The declaration of these chemicals in hairdressing was limited to work health and safety and public health assessment.

For a summary of the assessment read the Ammonium, potassium and sodium persulfate fact sheet.

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