Reaction mass of 1-phenylethanone and 2-phenylpropanal and 1,4-diphenylbut-2-ene-1,4-dione

Ecotoxicological Summary

Conclusion on classification

Reaction mass of acetophenone and hydratropaldehyde and (E)-1,4-diphenyl-2-butene-1,4-dione

Classification with regard to environmental hazards (Hazardous to the aquatic environment)

Based on the available data for the constituents Reaction mass of acetophenone and hydratropaldehyde and (E)-1,4-diphenyl-2-butene-1,4-dione is evaluated as at least inherently biodegradable (Acetophenon: 64.7% biodegradation after 14 d, p-cresol: 80 to 95% were degraded within 40 days, OECD 301 C; o-cresol: 80 to 95 % were degraded within 40 days, OECD 301 C; m-cresol: 90 % after 28 d, OECD 302 D; 1,1'-(1,1-dimethyl-3-methylene-1,3-propanediyl)bisbenzene: inherently biodegradable (OECD 302 C: mean of 64% degradation, after 28 days); Phenol: activated sludge 62 %/100 h, readily biodegradable (OECD 301C); activated sludge (anaerobic): 80,1 %/50 d, readily biodegradable under anaerobic conditions(ECETOC-Method).Water: 86–96 %/20 d, readily biodegradable (BOD-Test APHA)).

The lowest acute EC/LC50 value in aquatic tests was found for the impurity1,1'-(1,1-dimethyl-3-methylene-1,3-propanediyl)bisbenzene. For this substance, the LC50 (D. magna, 48 h) = 0.057^{Note 1}mg/L (based on ECHA-Information on registered substance).

(Note 1: the used test system is evaluated as not appropriate because the test was done using the solvent N,N-dimethylformamide to get test item soluble. Instead, the water accommodative fraction method should have been used. Therefore, this test is classified as not reliable. However, the classification is used for the evaluation of the multi constituent substance.).

 

The environmental hazards (Hazardous to the aquatic environment) assessment is based on available information on the hazards for each of the containing substances. The procedure laid out in section 4.1.3. (Classification criteria for mixtures) of annex I of the CLP-Regulation (1272/2008 (EC)) was used. Data are available for most of the relevant constituents and impurities, however for a minor but however relevant amount (concentration) of constituents data are missing. Data is available for one constituent that is classified as Acute 1 and others that are not classified.

For final classification according to CLP regulation the summation method (4.1.3.5) was applied.

1,1'-(1,1-dimethyl-3-methylene-1,3-propanediyl)bisbenzene is classified into acute hazards (Acute 1) by the REACH registrants (based on ECHA published information),

Concentration of that substance in the mixture: up to 2.2 % (typical 1.9%)

The M-Factor for1,1'-(1,1-dimethyl-3-methylene-1,3-propanediyl)bisbenzene is 10 (based on theLC50 (D. magna, 48 h) = 0.057 mg/L and Table 4.1.3 of annex I of CLP-Regulation).

Concentration in the multi constituent substance X M = 22

This is lower than 25%, which is the threshold for classifying a mixture into Acute 1 (Table 4.1.1, Annex I of CLP-regulation). Therefore, the multi constituent substance Reaction mass of acetophenone and hydratropaldehyde and (E)-1,4-diphenyl-2-butene-1,4-dione does not need to be classified as Acute 1

Due to the reasons above (inherently biodegradable, and the sum of components classified as Acute 1 is less than 25%) the substance is not classified as dangerous/hazardous for the environment according to Directive 67/548/EEC and according to the Regulation (EC) 1272/2008 on classification, labelling and packaging of substances and mixtures (CLP Regulation).

Summary:

According to 67/548/EEC:      not classified

 

According to GHS (Regulation (EC) 1272/2008):

Hazardous to the environment (aquatic)      not classified, no hazard statement

                                                      Reason for (non)classification:    see above

Hazardous to the atmospheric environment:

(Hazardous to the ozone layer: This includes substances which are listed in Annex I to Regulation (EC) No 2037/2000 of the European Parliament and of the Council of substances that deplete the ozone layer (1) and its subsequent amendments):
The known constituents are not listed in Annex I of (EC) No 2037/2000.

 

M-Factor:                                     No

Labelling:                                     No Signal word and Pictogram for environmental hazards