Quaternary ammonium compounds, C18 and C18 (unsaturated) alkyltrimethyl, chlorides

Acute Toxicity: dermal

Administrative data

Endpoint:

acute toxicity: dermal

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the substance is classified as corrosive to the skin

Cross-reference

Reason / purpose for cross-reference:

data waiving: supporting information

Reference

Based on the results of the read across study, test substance is considered to be corrosive to skin as well as eyes. 

Endpoint conclusion:

adverse effect observed (corrosive)

Endpoint conclusion:

no study available

Endpoint conclusion:

no study available

Skin

A study was conducted to determine the skin irritation potential of the read across substance, C16-18 and C18 -unsatd. TMAC (50% active) in rabbits, according to a method similar to OECD Guideline 204. Six rabbits (both sexes) were treated with 0.5 mL of undiluted read across substance (50% active ingredient) in an occlusive patch fixed with adhesive tape and wrapped with an impervious material, for 4 h. Observations were made at 4 h, 48 h and 10 days post-exposure. If the read across substance appeared to be corrosive after 4 h, another study was conducted with a 1 h exposure period under similar test conditions. The Draize scoring criteria was used for evaluating the corrosion potential. At 4 h, very slight to well-defined erythema, very slight ischemia and very slight oedema were observed, with an average irritation score of 4/8. At 48 h, there was well-defined to moderate erythema, very slight to slight ischemia and very slight or slight oedema and the average irritation score was 5.4/8. After 10 days, slight to distinct incrustation and decreased hair growth was observed. After an exposure period of 1 h, very slight erythema was observed with an average irritation score of 0.85/8. After 48 h, there was very slight to moderate erythema and very slight or slight oedema and the average irritation score was 1.25/8. No skin effects were observed after 10 days. Under the study conditions, the undiluted read across substance (50% active ingredient) was corrosive after 4 h of occlusive exposure. Based on the results of the read across study, similar corrosive potential is expected for the test substance.

Eye

In accordance with Annex VII, Section 8.2, Column 2, eye irritation studydoes not need to be conducted because the substance is classified as corrosive to the skin.

Based on the results of the read across in vivo skin irritation study, the test substance warrants a corrosive, 'Skin Corr. 1C; H314: Causes severe skin burns and eye damage' as well as serious eye damage, 'Eye dam. 1; H31: Causes serious eye damage' classification according to the EU CLP criteria (Regulation EC 1272/2008). Labelling for this endpoint is covered by the above classifications for skin effects.