Registration Dossier
Registration Dossier
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EC number: 250-807-9 | CAS number: 31795-24-1
Endpoint summary
Administrative data
Description of key information
The acute oral LD50 of potassium methylsilanetriolate was determined to be >2000 mg/kg in a study conducted according to OECD 423 (acute toxic class method) and in compliance with GLP (LPT, 2002). No data are available for the dermal or inhalation routes. In accordance with Column 2 of REACH Annex VIII, the inhalation and dermal toxicity studies (required in Sections 8.5.2 and 8.5.3) do not need to be conducted as the substance is classified as corrosive.
Key value for chemical safety assessment
Acute toxicity: via oral route
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed
- Dose descriptor:
- LD50
- Value:
- 2 000 mg/kg bw
Acute toxicity: via inhalation route
Endpoint conclusion
- Endpoint conclusion:
- no study available
Acute toxicity: via dermal route
Endpoint conclusion
- Endpoint conclusion:
- no study available
Additional information
The key study for acute oral toxicity is the only available acute toxicity study for potassium methylsilanetriolate. An acute oral LD50 value of >2000 mg/kg bw was determined in a reliable study conducted according to an appropriate test protocol, and in compliance with GLP. No mortality occurred. All animals of each sex showed clinical signs of toxicity including slightly reduced motility, slight ataxia, slightly reduced muscle tone and slight dypsnoea up to 1 hour after administation of the test material. All animals gained the expected body weight over the study period. No macroscopic abnormalities were observed at necropsy.
Justification for selection of acute toxicity – oral endpoint
The study was conducted according to an appropriate OECD test guideline and in compliance with GLP.
Justification for selection of acute toxicity – inhalation endpoint
In accordance with Column 2 of REACH Annex VIII, the acute toxicity study via the inhalation route (required in Section 8.5.2) does not need to be conducted as the substance is classified as corrosive.
Justification for selection of acute toxicity – dermal endpoint
In accordance with Column 2 of REACH Annex VIII, the acute toxicity study via the dermal route (required in Section 8.5.3) does not need to be conducted as the substance is classified as corrosive.
Justification for classification or non-classification
Based on the available acute oral toxicity data, potassium methylsilanetriolate does not require classification for acute toxicity
according to Regulation (EC) No. 1272/2008. The acute inhalation and dermal endpoints are waived based on the corrosive nature of the substance.Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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