New substances of very high concern added to the Candidate List in REACH regulation

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Last week, four new substances or group of substances were added to the REACH Candidate list for authorization, which now consist of 173 chemicals. The next step, the authorization list, consists of 31 chemicals previously listed on the Candidate list.

The new four chemicals on the candidate list are first of all the much discussed endocrine disruptor and reprotoxic chemical: Bisphenol A (BPA) used mainly for manufacture of polycarbonate and epoxy resins and previously discussed on this site on March 5, March 19 and April 9, 2014.



Secondly, the persistent, bioaccumulative and reprotoxic surfactant and PFAS chemical: Perfluorodecanoic acid (PFDA) and its sodium and ammonium salts. Thus in total 3 single substances.



Thirdly, the environmental hazard and industrial intermediate: p-(1,1 –Dimethylpropyl)phenol.
p tert pentyl phenol

p-(1,1 –Dimethylpropyl)phenol

Finally, all isomers of: p-Heptylphenol/4-heptylphenol or a combination hereof, which are used as industrial intermediates. There are not very much information about the properties of these chemicals but they were evaluated environmental hazardous based on the properties of structurally related alkylphenols with a shorter or longer alkyl chain. That procedure may be questionable! Together with the structure formulas of the two REACH registered chemicals are mentioned the EC and CAS numbers, which curiously are not included in ECHA’s listing.

4 hepthylphenol

4-Heptylphenol (EC 217-862-0; CAS 1987-50-4 )
4 hepthylphenol alleGeneral formula for 4-Heptylphenoler derivatives (EC 276-743-1; CAS 72624-02-3)

This  item is considered a UVCB substance (Chemical Substances of Unknown or Variable Composition, complex reaction products or of biological materials). It consists of 23 not registered, branched isomers mentioned in the Annex XV report with CAS numbers and structure formulas.

This report also lists  ptert-heptylphenol, without CAS no. Unfortunately, the  authors have not recognized, that this substances already is listed under the name: Phenol, 4-(1,1- dimethylpentyl) and CAS no. 30784-31-7.

Since, the last News about this Candidate List topic at this site on July 29 2015 and the new listing discussed today, the following substances have been listed on the Candidate list:


Benzo[a]pyrene (BaP)


2,4-di-tert-Butyl-6-(5-chlorobenzotriazol-2-yl)phenol (UV-327)

2-(2H-Benzotriazol-2-yl)-4-(tert-butyl)-6-(sec-butyl)phenol (UV-350)


Perfluorononanoic acid (PFNA) and its sodium and ammonium salts:



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