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.


Decabromodiphenyl Ether - PEC 41 [Word 394 KB]

CAS number(s): 1163-19-5

Published 6 May 2019

Read our priority existing chemical assessment report on DecaBDE published in May 2019.


Di(methoxyethyl) phthalate - PEC38 [WORD 258 KB]

CAS number(s): 117-82-8

Published 1 May 2014

Di(methoxyethyl) phthalate (DMEP) was declared a priority existing chemical for full assessment for use in toys, child-care articles and cosmetics on 7 March 2006 (PEC/38). The declaration was based on the ubiquitous use of phthalates as solvents and plasticisers in industrial and consumer products. The assessment is restricted to public health risk from use in cosmetics, children's toys and childcare articles.

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


Dibutyl phthalate (DBP) - PEC36 [WORD 455 KB]

CAS number(s): 84-74-2

Published 1 November 2013

Dibutyl phthalate (DBP) was declared a priority existing chemical (PEC) for full assessment on 7 March 2006 (PEC/36). The declaration was based on the ubiquitous use of phthalates as solvents and plasticisers in industrial and consumer products. The assessment is restricted to public health risk from use in cosmetics, children's toys and childcare articles.

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


Diethyl phthalate (DEP) - PEC33 [WORD 377 KB]

CAS number(s): 84-66-2

Published 1 November 2011

Diethyl phthalate (DEP) was declared a priority existing chemical for full assessment for use in toys, child care articles and cosmetics on 7 March 2006 (PEC/33). The declaration was based on the ubiquitous use of phthalates as solvents and plasticisers in industrial and consumer products. The assessment is restricted to public health risk from use in cosmetics, children's toys and childcare articles.

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


Diethylhexyl phthalate (DEHP) - PEC32 [WORD 370 KB]

CAS number(s): 117-81-7

Published 1 July 2010

Diethylhexyl phthalate (DEHP) was declared a priority existing chemical (PEC) for full assessment on 7 March 2006 (PEC/32). The declaration was based on the ubiquitous use of phthalates as solvents and plasticisers in industrial and consumer products. The assessment is restricted to public health risk from use in cosmetics, children's toys and childcare articles.

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


Diisodecyl phthalate and Di-n-octyl phthalate - PEC39 [WORD 342 KB]

CAS number(s): 68515-49-1; 26761-40-0; 117-84-0

Published 1 May 2015

DIDP and DnOP were declared priority existing chemicals (PECs) for full assessment on 7 March 2006 (PEC/39). The declaration was based on the ubiquitous use of phthalates as solvents and plasticisers in industrial and consumer products. The assessment is restricted to public health risk from use in cosmetics, children's toys and childcare articles.

For a summary of the assessment read the DIDP and DnOP fact sheet.


Diisononyl phthalate (DINP) - PEC35 [WORD 295 KB]

CAS number(s): 28553-12-0; 68515-48-0

Published 1 September 2012

Diisononyl phthalate (DINP) was declared a priority existing chemical for full assessment for use in toys, child-care articles and cosmetics on 7 March 2006 (PEC/35). The declaration was based on the ubiquitous use of phthalates as solvents and plasticisers in industrial and consumer products. The assessment is restricted to public health risk from use in cosmetics, children's toys and childcare articles.

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


Dimethyl phthalate (DMP) - PEC37 [WORD 341 KB]

CAS number(s): 131-11-3

Published 1 January 2014

Dimethyl phthalate (DMP) was declared a priority existing chemical for full assessment on 7 March 2006 (PEC/37). The declaration was based on the ubiquitous use of phthalates as solvents and plasticisers in industrial and consumer products. The assessment is restricted to public health risk from use in cosmetics, children's toys and childcare articles.

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

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Last update 19 September 2019