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Environmental fate & pathways

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In a guideline (OECD 301D) and GLP ready biodegradability study, a substance corresponding to the description "Ethanol, 2-butoxy- ,manufacture of, by-products from" gave a positive result (>60% degradation relative to the COD value) with a maximum of 76% biodegradation recorded on day 28. In a similar GLP and guideline study a substance described as "Poly(oxy-1,2-ethanediyl), α-butyl-ω-hydroxy" attained 69% degradation after 28 days. Both of these similar substances can therefore be considered as ready biodegradable under the strict terms and conditions of this guideline. The BOD5 value for the latter (nominal concentration 50 mg/l) was determined to be 3.23 mg O2/L and the COD value was determined to be 97.33 mg O2/L.

In a screening marine biodegradability study, a glycol ether meeting the description "Poly(oxy-1,2,-ethanediyl), α-butyl, ω-hydroxyl" gave a positive result (>68 % degradation relative to the COD value) after 28 days. In a guideline (OECD 306) and GLP biodegradability study in seawater, a glycol ether meeting the description "Poly(oxy-1,2,-ethanediyl), α-butyl, ω-hydroxyl" gave a positive result (>60% degradation relative to the COD value) with a maximum of 70% recorded on day 28. It may therefore be concluded that there is a potential for ready biodegradation under marine environmental conditions.

Biodegradation testing in soil is not required as the substance is readily biodegradable.