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EC number: 300-344-4 | CAS number: 93925-42-9
Hydrolysis
Administrative data
- Endpoint:
- hydrolysis
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2011
- Reliability:
- 1 (reliable without restriction)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 011
- Report date:
- 2012
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 111 (Hydrolysis as a Function of pH)
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Staatliches Gewerbeaussichtsamt, Hildesheim, Germany
Test material
- Reference substance name:
- Silicic acid (H4SiO4), tetraethyl ester, reaction products with bis(acetyloxy)dibutylstannane
- EC Number:
- 300-344-4
- EC Name:
- Silicic acid (H4SiO4), tetraethyl ester, reaction products with bis(acetyloxy)dibutylstannane
- Cas Number:
- 93925-42-9
- Molecular formula:
- C12H24O4Sn.C8H20O4Si
- IUPAC Name:
- Acetic acid, 1,1'-(dibutylstannylene) ester, reaction products with silicic acid (H4SiO4) tetra-Et ester
- Details on test material:
- Wacker Catalyst 41, Ch. UL03475
Constituent 1
- Radiolabelling:
- no
Study design
- Analytical monitoring:
- yes
- Estimation method (if used):
- Samples were taken at test start (0 min) and until plateau phase
was reached. All samples were analysed immediately (max. 3 min
until start of analyses) via GC-SPME-FID for the transformation
product ethanol.
Duration of testopen allclose all
- Duration:
- 3 min
- pH:
- 4
- Temp.:
- 20
- Initial conc. measured:
- ca. 0.2 other: v/v %
- Duration:
- 3 min
- pH:
- 7
- Temp.:
- 20
- Initial conc. measured:
- ca. 0.2 other: v/v %
- Duration:
- 3 min
- pH:
- 9
- Temp.:
- 20
- Initial conc. measured:
- ca. 0.2 other: v/v %
- Positive controls:
- no
- Negative controls:
- no
Results and discussion
- Transformation products:
- yes
Identity of transformation products
- No.:
- #1
Reference
- Reference substance name:
- Unnamed
- IUPAC name:
- ethanol
- Inventory number:
- InventoryMultipleMappingImpl [inventoryEntryValue=EC 200-578-6]
- CAS number:
- 64-17-5
Total recovery of test substance (in %)open allclose all
- % Recovery:
- > 70 - < 100
- St. dev.:
- 20
- pH:
- 4
- Temp.:
- 20 °C
- Duration:
- ca. 3 min
- % Recovery:
- > 70 - < 100
- St. dev.:
- 20
- pH:
- 7
- Temp.:
- 20 °C
- Duration:
- ca. 3 min
- % Recovery:
- > 70 - < 100
- St. dev.:
- 20
- pH:
- 9
- Temp.:
- 20 °C
- Duration:
- ca. 3 min
Dissipation DT50 of parent compound
- Remarks on result:
- not determinable because of methodological limitations
- Remarks:
- time frame to short
Any other information on results incl. tables
Reaction rate constants and half lives for all tested conditions could not be assessed, as the
hydrolysis reaction was completed before (or within) the first analysis.
Hydrolysis Time [min]
|
Ethanol content [%, v/v] |
||
pH 4 |
pH 7 |
pH 9
|
|
0 |
(0.5371) |
(1.1523) |
(0.5344) |
10 |
0.2536 |
0.3023 |
0.3053 |
20 |
0.2574 |
0.2569 |
0.1569 |
30 |
0.3148 |
0.2301 |
0.1753 |
40 |
0.1834 |
0.2453 |
0.1793 |
50 |
0.1845 |
n.a. |
n.a. |
60 |
0.1796 |
n.a. |
n.a. |
MV |
0.183 |
0.244 |
0.171 |
SD |
0.00210 |
0.0110 |
0.00975 |
RSD [%] (plateau phase) |
1.15 |
4.51 |
5.70 |
Bold= plateau phase
n.a. = not applicable (not sampled as plateau phase was reached)
() = out of calibration range
MV = mean value of the last three samples
SD = standard deviation
RSD [%] = relative standard deviation
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Conclusions:
- Reaction rate constants and half lives for all tested conditions could not be assessed, as the
hydrolysis reaction was completed before (or within) the first analysis. Taking the visual
observation of the immediate precipitation into account, it could be assumed that the
hydrolytical half life is significantly lower than the analysis time (15 minutes at 40 °C) needed
for the measurement of the samples.
WACKER Katalysator 41 is highly hydrolytically unstable. The hydrolytically half life of the test
item was below the scope of the employed methodology and could not be assessed following
the principles of OECD Guideline 111 for all tested conditions
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