Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Classification & Labelling & PBT assessment

PBT assessment

Currently viewing:

Administrative data

PBT assessment: overall result

PBT status:
PBT assessment does not apply
  • Persistence

As indicated in the REACH Guidance of PBT assessment, Section C.1.3, page 5 [information_requirements_part_c_en.pdf, dec. 2011], persistency testing is practically not possible due to the refractory inherent properties and complexity of this UVCB substance.

Wording in the REACH Guidance:

"....However, for substances for which persistency testing is difficult or practically impossible, like e.g. for certain multi-constituent or very poorly water soluble substances, it may sometimes be more reasonable to start the PBT/vPvB assessment by evaluating the B criterion (see Section R. for further guidance)."

  • Bioaccumulation

Pitch, coal tar, high-temp., < 1% 4- to 5-membered condensed ring aromatic hydrocarbons [EC no. 701-305-8] (CTPhtht) is a practically water-insoluble UVCB substance and cannot pass biological membranes due to its complex high-molecular matrix structure. Hence, a carbo pitch-specific BCF-value cannot be determined. Besides its poor bioavailability, the determination of the partition coefficient proved to be technically not feasible due to its very limited solubility (see phys.-chem. data, Chapter 1.3.). Hence, the bioaccumulation criteria for PBT are not applicable to CTPhtht itself.

Wording in the REACH Guidance, Section C.1.4.2, page 6:

"...However, for a substance produced or imported at a level of 100 t/y or more, information on bioconcentration in aquatic species has to be made available by the registrant and to be considered in the assessment, unless this information can be waived according to column 2 of Annex IX or according to Annex XI(3) (e.g. low bioaccumulation potential, no exposure, testing technically not possible)."

  • Toxicity Assessment

Based on structure-analogy, Pitch, coal tar, high-temp., < 1% 4- to 5-membered condensed ring aromatic hydrocarbons [EC no. 701-305-8] (CTPhtht), is not expected to show chronic aquatic toxicity under standard experimental conditions. However, it has been self-classified as CMR substance, based on BaP content. The current re-evaluation concludes: Carc. 1B, Muta. 1B, and Repr. 1B. Therefore, the T criterion is fulfilled.