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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

According to Section 8.5 of Annex VII, an acute oral toxicity study with the registered substance is not required as the substance is classified as corrosive to the skin.

In the key acute dermal toxicity study conducted according to a protocol similar to OECD 402 and in compliance with GLP, the LD50 value reported for 3,3'-(1,1,3,3-tetramethyldisiloxane-1,3-diyl)bispropylamine was ≥2000 mg/kg bw (IRDC, 1985).

Key value for chemical safety assessment

Acute toxicity: via oral route

Endpoint conclusion
Endpoint conclusion:
no study available

Acute toxicity: via inhalation route

Endpoint conclusion
Endpoint conclusion:
no study available

Acute toxicity: via dermal route

Endpoint conclusion
Endpoint conclusion:
no adverse effect observed
Dose descriptor:
LD50
Value:
2 000 mg/kg bw

Additional information

According to Section 8.5 of Annex VII, an acute oral toxicity study with the registered substance is not required as the substance is classified as corrosive to the skin.

In the supporting acute oral toxicity study, conducted according to a protocol similar to OECD 423 and in compliance with GLP, the reported LD50 value for 3,3'-(1,1,3,3-tetramethyldisiloxane-1,3-diyl)bispropylamine was concluded by the study authors to be <500 mg/kg bw (IRDC, 1985). The reviewers consider that the result should be considered as an LDL0 value.

Following single oral gavage administration of 500 or 5000 mg/kg bw undiluted test substance to two male rats per group, mortality was observed at all dose levels. Both animals treated with 500 mg/kg bw died on day 2 post-administration, while both animals treated with 5000 mg/kg bw died within 4 hours after dosing.

In the key acute dermal toxicity study conducted according to a protocol similar to OECD 402 and in compliance with GLP, the LD50 value reported for 3,3'-(1,1,3,3-tetramethyldisiloxane-1,3-diyl)bispropylamine was ≥2000 mg/kg bw (IRDC, 1985).

Following single dermal 24-hour application of 200 or 2000 mg/kg bw of undiluted test material onto the skin of one male and one female rabbit per group, no mortality was observed during the study period. No clinical signs, body weight changes or port-morterm examinations were reported.

Justification for classification or non-classification

Based on the available data for 3,3'-(1,1,3,3-tetramethyldisiloxane-1,3-diyl)bispropylamine, no classification for acute toxicity is required according to Regulation (EC) No. 1272/2008. The substance is classified as corrosive (see Section 7.3).