Registration Dossier
Registration Dossier
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 701-305-8 | CAS number: -
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
Data for Pitch, coal tar, high-temp., < 1% 4- to 5-membered condensed ring aromatic hydrocarbons [EC no. 701-305-8] (CTPhtht) is not available. Results from a cell multiplication inhibition test with the supporting substance Pitch, coal tar, high temp. [CAS no. 65996-93-2] is used instead to characterise the toxicity of CTPhtht to microorganisms. No inhibitory effect was observed up to a nominal concentration of 10000 mg/L (loading).
Key value for chemical safety assessment
- EC10 or NOEC for microorganisms:
- 10 000 mg/L
Additional information
No experimental data is available for the substance Pitch, coal tar, high-temp., < 1% 4- to 5-membered condensed ring aromatic hydrocarbons [EC no. 701-305-8] (CTPhtht) itself, but data have been identified for Pitch, coal tar, high temp. [CAS no. 65996-93-2], the precursor material. This is used as supporting substance. Coal tar pitch, high termp. is closely structure-related to CTPhtht, and comprises also an inert matrix of highly ring-condensed polycyclic aromatic hydrocarbons. Due to the production process, the target substance CTPhtht will be depleted of available single PAH constituents compared to Pitch, coal tar, high temp. [CAS no. 65996-93-2]. Therefore, results originating from coal tar pitch, high temp., can be considered as worst-case situation.
Toxicity to microorganism was tested with coal tar pitch in a Pseudomonas putida cell multiplication inhibition test (Hillmann E. 1991). No inhibition was detected at a loading of 10,000 mg/L (EL0 = 10,000 mg/L).
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
