Due to the generally hydrophobic nature of the polymer this solubility appears high. This may be accounted for by the presence of suspended material in the aqueous phase supernatant. However, the partition coefficient indicates up to 16% of the molecular species present have potentially greater solubility. Note: Only a very test report was part of the CEPA DOC-750 documentation. DuPont Performance Coatings (year not stated). Hydrolysis as a Function of pH Not determined Remarks Due to low water solubility, the polymer is not expected to hydrolyse under environmental conditions (pH 4-9) in spite of the presence of groups, which are potentially hydrolysable. Partition Coefficient (n-octanol/water) Log Kow = 2.9 (25oC) (for log Kow 1.16 to 2.39, total area % = 16%) Not provided Remarks Rather than the original report, only brief details have been provided in the CEPA DOC750 documentation. From this it appears that an HPLC method was used and that there were at least 4 peaks of greater hydrophilicity. DuPont Performance Coatings (2001). Adsorption/Desorption Not determined Remarks While this was not attempted, it is expected that the polymer will adsorb to or associate with soils and sediments due to its hydrophobic structure (in spite of comparatively high water solubility). Dissociation Constant Not determined Remarks No portion of the molecule is expected to be ionised in the environmental pH range of 4 – 9. No acidic or basic groups are present. Particle Size Not applicable Flash Point - resin solution 52 oC resin solid Does not flash EC Directive 92/69/EEC A.9 Point. Remarks From MSDS. Report not provided. Resin solution data for solvent. Flammability Limits Upper: 7.0% Lower: 0.74% EC Directive 92/69/EEC A.11 Flammability Remarks From MSDS. Report not provided. Data for solvent. Autoignition Temperature No data but expected to be that of the solvent methyl amyl ketone = 532 deg C. Not provided Remarks Report not provided. Data referenced from Sax's Dangerous Properties of Industrial Materials, Tenth edition (Lewis 2000). Explosive Properties Not explosive. Remarks Not expected to be explosive based on structure.
OECD TG 301 B, Ready Biodegradability: CO2 Evolution Test (Modified Sturm Test). Inoculum Activated sludge Exposure Period 28 days Auxiliary Solvent None Analytical Monitoring Remarks - Method Reference substance – sodium benzoate Toxicity test – test substance + reference substance Test substance sodium benzoate Day % degradation Day % degradation 0 0 0 0 5 5 5 22 10 10 10 54 12 10 12 62 28 13 28 - Remarks - Results Percentage degradation of the reference substance was greater than 60% by day 12, thus validating the study. In the toxicity test the degradation was greater than 25% within 10 days, thus indicating that the test polymer was not inhibitory to the microorganisms in the inoculum. The degradation of the notified polymer did not reach 60% within the 28 days, thus the notified polymer is not readily biodegradable. CCER 2001 8.2. Ecotoxicological investigations 8.2.1. Acute toxicity to fish A very brief report was submitted as part of the Canadian assessment document. DOC750 (notified polymer) OECD TG 203 Fish, Acute Toxicity Test – unaerated, static. Species Oncorhynchus mykiss Exposure Period 96 hours Auxiliary Solvent None Water Hardness Not reported Analytical Monitoring None Remarks – Method Temperature was maintained at 12.6-12.8oC. Dissolved oxygen and pH were measured at the start and end of study and ranged between 10.2 (0 h) and 7.7 – 8.8 (96 h) mg/L and 7.0-7.1 (0 and 96 h) respectively. Concentration mg/L Number of Fish Mortality Nominal Actual 1 h 24 h 48 h 72 h 96 h 0 - 10 - 0 0 0 0 1 - 10 - 0 0 0 0 10 - 10 - 0 0 0 0 100 - 10 - 0 0 0 0 1000 - 10 - 4 6 9 10 LC50 316 mg/L (95% CI = 100 – 1000) at 96 hours.