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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Classification & Labelling & PBT assessment

PBT assessment

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Administrative data

PBT assessment: overall result

RECONSILE [3-(trimethoxysilyl)propyl]urea 023843-64-3
Type of composition:
boundary composition of the substance
State / form:
Reference substance:
RECONSILE [3-(trimethoxysilyl)propyl]urea 023843-64-3
PBT status:
the substance is not PBT / vPvB

The registered substance 1-[3-(Trimethoxysilyl)propyl]urea  (CAS No. 23843-64-3) is not PBT/vPvB based on ECHA guidance R.11.

Persistence Assessment

The registered substance is expected to hydrolyse rapidly (DT50 = 2.8 h, 20 -25°C and pH 7, QSAR) to form the silanol hydrolysis product [3-(trihydroxysilyl)propyl]urea and the alcohol hydrolysis product methanol (CAS No. 67 -56 -1). Therefore, the substance is not persistent (not P/vP).

Bioaccumulation Assessment

The registered substance has a predicted log Kow of -0.2 (QSAR) and therefore does not meet the screening criteria for bioaccumulation (not B/vB).

Toxicity Assessment

The available short-term effect values for aquatic toxicity to all three trophic levels and the available long-term effect value for algae are above the threshold value of 0.01 mg/L and the substance is not classified for mammalian toxicity. Therefore, the registered substance does not meet the screening criteria for T (not T).