Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Description of key information

In an in vivo skin irritation study conducted according to OECD 404 and in compliance with GLP, 1,6-bis(trimethoxysilyl)hexane was not irritating to rabbit skin (Dow Corning Corporation, 2009a).
In an in vivo eye irritation study conducted according to OECD 405 and in compliance with GLP, 1,6-bis(trimethoxysilyl)hexane was not irritating to rabbit eyes (Dow Corning Corporation, 2009b).

Key value for chemical safety assessment

Skin irritation / corrosion

Endpoint conclusion
Endpoint conclusion:
no adverse effect observed (not irritating)

Eye irritation

Endpoint conclusion
Endpoint conclusion:
no adverse effect observed (not irritating)

Respiratory irritation

Endpoint conclusion
Endpoint conclusion:
no study available

Additional information

In an in vivo skin irritation study conducted according to OECD 404 and in compliance with GLP, 1,6-bis(trimethoxysilyl)hexane was not irritating to rabbit skin (Dow Corning Corporation, 2009a). 0.5 ml of neat test material was applied to the intact skin of 3 animals for 4 hours under a semi-occlusive dressing. No signs of dermal irritation or corrosion were seen at any scoring interval throughout the study on any animal

In an in vivo eye irritation study conducted according to OECD 405 and in compliance with GLP, 1,6-bis(trimethoxysilyl)hexane was not irritating to rabbit eyes (Dow Corning Corporation, 2009b). 0.1 ml of neat test material was instilled in the conjunctival sac of 3 animals. Redness and chemosis were noted in one animal, and redness only was noted in another animal at the 1 hour observation. There were no observations indicating irritation or corrosion at 24 h, 48 h or 72 h post-instillation.


Justification for selection of skin irritation / corrosion endpoint:
The selected study is the only available skin irritation test for this substance. It was conducted in accordance with an appropriate OECD test guideline and in compliance with GLP.

Justification for selection of eye irritation endpoint:
The selected study is the only available eye irritation test for this substance. It was conducted in accordance with an appropriate OECD test guideline and in compliance with GLP.

Justification for classification or non-classification

Based on the available in vivo skin and eye irritation studies, the substance is not classified as irritant or corrosive according to Regulation (EC) No 1272/2008.