Registration Dossier
Registration Dossier
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EC number: 203-788-6 | CAS number: 110-65-6
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
Pseudomonas putida 17 hour EC10: 1990 mg/L
Pseudomonas putida 17 hour EC50: 3940 mg/L
Pseudomonas putida 17 hour EC90: 6903 mg/L
Key value for chemical safety assessment
- EC50 for microorganisms:
- 3 940 mg/L
- EC10 or NOEC for microorganisms:
- 1 990 mg/L
Additional information
The 1,4 -butynediol 17 hour EC10 for aquatic invertebrates provided in a relieable study comparative to a DIN38412 guideline study is 1990 mg/L; the 17 hour EC50 is 3940 mg/L (BASF AG 1987). This result is supported by microorganism toxicity data from three well-documented publications that indicate a low degree of toxicity to microorganisms (Seward et al. 2001; Chen et al. 2002; Chen et al. 1996).
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.
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