3-methyl-1,5-pentanediyl diacrylate

Endpoint summary

Description of key information

According to the ECHA Guidance on Information Requirements and Chemical Safety Assessment, Chapter R.7C: Endpoint Specific Guidance (draft version 3.0, March 2017), “in the case of readily biodegradable substances which are not directly applied to soil it is generally assumed that the substance will not enter the terrestrial environment and as such there is no need for testing of soil organisms”; these criteria are met for 3-METHYL-1,5 -PENTANEDIYL DIACRYLATE (CAS 64194-22-5).

In addition and based on QSAR calculations demonstrating low adsorption potential (log Koc = 2.34), the substance can be considered as not highly adsorptive. That indicates that soil and sediment exposure is unlikely.

It should be noted that chemicals can reach the soil via several potential routes:

1.      Application of sewage sludge in agriculture.

3-METHYL-1,5 -PENTANEDIYL DIACRYLATE , when released into the sewage of an industrial downstream’s user plant, is treated with other substances in dedicated sewage treatment plants. The activated sludge stemmed from these sewage treatment plants is then extracted and treated as chemical waste.

From the production plant, the release of  3-METHYL-1,5 -PENTANEDIYL DIACRYLATE (CAS 64194-22-5 into the sewage is not expected at all, as all wastewater is fully collected and incinerated. Regarding the rest of the lifecycle, 3-METHYL-1,5 -PENTANEDIYL DIACRYLATE, is mainly used in the preparation and uses of  industrial formulations  for the production of UV/EB cured coatings or inks .As those processes are water free  and if any use of water for cleaning it has to be disposed as a waste. Therefore, there is no production of sewage sludge and it can be assumed that the soil is not exposed to 3-METHYL-1,5 -PENTANEDIYL DIACRYLATE  via use of sludge. 

As a consequence, we can assume that soil is not exposed to 3-METHYL-1,5 -PENTANEDIYL DIACRYLATE via the application of sewage sludge in agriculture.

2.      Direct application of chemicals.

Based on the uses inventoried for 3-METHYL-1,5 -PENTANEDIYL DIACRYLATE , we can consider that there is no direct application of thissubstance on the soil compartment. The relevant Environmental Release Categories (ERC), as described in guidance R12 (version 3.0, December 2015), are detailed in Chapter 9 (Exposure Assessment).

3.      Deposition from the atmosphere.

Deposition from the atmospheric compartment involves volatilization, vaporization or direct release of a considered substance into the atmosphere.

From the production,all waste gases/vapours are fully collected and subject to thermal oxidation with a measured efficacy of 99.5%.

Regarding the rest of the life cycle and as 3-METHYL-1,5 -PENTANEDIYL DIACRYLATE  is not a volatile substance (VP = 0.105 Pa at 20°C).The emission of volatiles are considered as null during the application of formulations because the time between the application and the curing is very short. The emission occurs post-curing, the substance has polymerized before the emission.

 

As the substance is a skin sensitizer, personal protection recommendations have to be followed (see qualitative evaluation), which avoid the volatilization of the substance.

 

According to this information, deposition on soil from the atmosphere is not expected. Based on these arguments, no test is proposed for the soil compartment.