Datasheet

Product name: DOWSIL™ 3145 RTV Mil-A-46146 Adhesive/Sealant
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Revision Date: 04.09.2020
Version: 4.0
Page 18 of 23
Method: OECD Test Guideline 301B
Decamethylcyclopentasiloxane
Biodegradability: Material is expected to biodegrade very slowly (in the environment). Fails
to pass OECD/EEC tests for ready biodegradability.
10-day Window: Not applicable
Biodegradation: 0.14 %
Exposure time: 28 d
Method: OECD Test Guideline 310
12.3 Bioaccumulative potential
Methyltrimethoxysilane
Bioaccumulation: Bioconcentration potential is low (BCF < 100 or Log Pow < 3).
Partition coefficient: n-octanol/water(log Pow): -0.82 Estimated.
octamethylcyclotetrasiloxane
Bioaccumulation: Bioconcentration potential is high (BCF > 3000 or Log Pow between 5 and
7).
Partition coefficient: n-octanol/water(log Pow): 6.49 Measured
Bioconcentration factor (BCF): 12,400 Pimephales promelas (fathead minnow) Measured
Dodecamethyl cyclohexasiloxane
Bioaccumulation: Bioconcentration potential is low (BCF less than 100 or log Pow greater
than 7).
Partition coefficient: n-octanol/water(log Pow): 8.87
Decamethylcyclopentasiloxane
Bioaccumulation: Bioconcentration potential is moderate (BCF between 100 and 3000 or
Log Pow between 3 and 5).
Partition coefficient: n-octanol/water(log Pow): 5.2 Measured
Bioconcentration factor (BCF): 2,010 Fish Estimated.
12.4 Mobility in soil
Methyltrimethoxysilane
No relevant data found.
octamethylcyclotetrasiloxane
Expected to be relatively immobile in soil (Koc > 5000).
Dodecamethyl cyclohexasiloxane
Potential for mobility in soil is very high (Koc between 0 and 50).
Decamethylcyclopentasiloxane
Expected to be relatively immobile in soil (Koc > 5000).
Partition coefficient (Koc): > 5000 Estimated.
12.5 Results of PBT and vPvB assessment
Methyltrimethoxysilane
This substance is not considered to be persistent, bioaccumulating and toxic (PBT). This
substance is not considered to be very persistent and very bioaccumulating (vPvB).