Methyl trimethyl-3-[(1-oxododecyl)amino]propylammonium sulphate

Endpoint summary

Description of key information

There are no reliable acute oral toxicity studies available for the substance itself. There is only an old unreliable study which gave an LD50 of 1770 mg/kg . However, there is a reliable acute oral study on an analogue substance and hence this latter study has been used to address the acute oral toxicity requirement. The analogue substance is of low acute oral toxicity in mammals with an LD50 is > 2350 mg/kg. There are two acute dermal studies available both on the substance. The more recent, reliable study gave an LD50 is > 2000 mg/kg. Testing by the inhalation route is not scientifically justified.

Key value for chemical safety assessment

Acute toxicity: via oral route

Link to relevant study records

Reference

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Study period:

January 1983

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 401 (Acute Oral Toxicity)

Version / remarks:

1981

GLP compliance:

not specified

Test type:

standard acute method

Limit test:

yes

Species:

rat

Strain:

Sprague-Dawley

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Age at study initiation: no data
- Weight at study initiation: m: 125 - 135g; f: 110 - 125g
- Fasting period before study: over night
- Housing: single caging, cage type: Macrolon type IlI./max. 5
- Diet: ad libitum; rat diet (R 4 Alleindiät für Ratten), Ssniff Spezialdiäten GmbH, 4770 Soest/Westfalen
- Water: ad libitum
- Acclimation period: 11 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 20 - 23
- Humidity (%): 40 - 70
- Air changes (per hr): 10 per hour
- Photoperiod (hrs dark / hrs light): 12 hours daily

Route of administration:

oral: gavage

Vehicle:

water

Details on oral exposure:

VEHICLE
- Concentration in vehicle: 500 mg/ml
- Amount of vehicle (if gavage): 10 ml/kg bw

The test substance was weighed out in a glass, then was filled with Aqua destillata up to the desired volume, was shaken well and afterwards labeled. The formulated test substance was a clear solution.

Doses:

5000 mg/kg bw

No. of animals per sex per dose:

5 males and 5 females

Control animals:

no

Details on study design:

The group of 5 female and 5 male rats were were given a single oral dose 5000 mg/kg of the test substance by gavage.

- Duration of observation period following administration: 14 d
- Body weights were recorded before treatment (day -1), at the treatment day (day 0), and on days 7 and 14 after treatment
- Clinical observation: Animals were observed 1/4 h, 1/2 h, 1 h, 2 h, 4 h after dosing and thereafter once daily up to day 14.
- Necropsy of the survivors performed: yes

Statistics:

As none of the test animals died a calculation of the LD50 was not possible.

Key result

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 5 000 mg/kg bw

Based on:

test mat.

Remarks on result:

other: based on product; mortality 0/10

Key result

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 350 mg/kg bw

Based on:

act. ingr.

Remarks on result:

other: based on a.i.; mortality 0/10

Mortality:

There were no mortalities

Clinical signs:

other: Except for ruffled fur on the day of treatment, the animals were free of clinical-/toxicological symptoms during the entire observation period of 14 days.

Gross pathology:

Necropsies were performed on all animals at the end of the 14-day observation period. In one animal a slight thickening of the stomach mucosa could be observed. Necropsies of all other animals showed no test compound-related macroscopic findings in the cranial-, thoracic- and abdominal cavity.

Interpretation of results:

GHS criteria not met

Conclusions:

The acute oral toxicity of the substance was >5000 mg/kg bw (47% a.i.), equivalent to LD50 > 2350 mg/kg bw (100% a.i.)

Executive summary:

In an acute oral toxicity study similar to OECD Guideline 401 (1981) 5 male and 5 female Sprague-Dawley rats were given a single dose of Rewocid UTM 185 (a.i. 47 %) at a dose of 5000 mg/kg bw (limit test). The substance was formulated in water and applied in a volume of 10 mL/kg bw. Animals were subsequently observed for 14 consecutive days.There were no deaths following a single oral dose of Rewocid UTM 185. Except for ruffled fur on the day of treatment, the animals were free of clinical/ toxicological signs during the entire observation period of 14 days. Necropsies were performed on all animals at the end of the 14-day observation period. In one animal a slight thickening of the stomach mucosa could be observed. Necropsies of all other animals showed no substance-related macroscopic findings in the cranial-, thoracic- and abdominal cavity.

Oral LD₅₀Combined: > 2350 mg/kg bw (active ingredient)

LD₅₀ > 5000 mg/kg bw determined in the study report refers to the substance as delivered. Amount of active ingredient in test substance is 47 % therefore the calculated oral LD₅₀ combined referring to 100 % active substance is 2350 mg/kg bw. Rewocid UTM 185 is practically nontoxic based on LD₅₀ in males and females.

                            

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed

Dose descriptor:

LD50

Value:

2 350 mg/kg bw

Quality of whole database:

Sufficient to meet data requirements. The study is Klimisch 2.

Acute toxicity: via inhalation route

Endpoint conclusion

Endpoint conclusion:

no study available

Quality of whole database:

An acute inhalation toxicity study is scientifically unjustified and is not in the interests of animal welfare. Acute studies are available by the oral and dermal routes.

Acute toxicity: via dermal route

Link to relevant study records

Reference

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Study period:

16 May 2012 and 30 May 2012.

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 402 (Acute Dermal Toxicity)

Qualifier:

according to guideline

Guideline:

EU Method B.3 (Acute Toxicity (Dermal))

GLP compliance:

yes (incl. QA statement)

Test type:

standard acute method

Limit test:

yes

Species:

rat

Strain:

Wistar

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Number: Five male and five female
- Source: Harlan Laboratories UK Ltd., Oxon, UK
- Age at study initiation: 8-12 weeks
- Weight at study initiation: at least 200g. The weight variation did not exceed ±20% of the mean weight for each sex.
- Housing: suspended solid-floor polypropylene cages furnished with woodflakes. The animals were housed individually during the 24-Hour exposure period and in groups of five, by sex, for the remainder of the study.
- Diet and Water: Free access to mains drinking water and food (2014C Teklad Global Rodent diet) was allowed throughout the study. The diet, drinking water and bedding were routinely analysed and were considered not to contain any contaminants that could reasonably be expected to affect the purpose or integrity of the study.
- Acclimation period: 5 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 19 to 25°C
- Humidity (%): 30-70%
- Air changes (per hr): at least 15
- Photoperiod (hrs dark / hrs light): twelve hours continuous light (06:00 to 18:00) and twelve hours darkness

Type of coverage:

semiocclusive

Vehicle:

unchanged (no vehicle)

Details on dermal exposure:

TEST SITE
- Area of exposure: back and flanks
- % coverage: approximately 10% of the total body surface area
- Type of wrap if used: surgical guaze with self-adhesive bandage

REMOVAL OF TEST SUBSTANCE
- Washing (if done): bandage was carefully removed and the treated skin and surrounding hair wiped with cotton wool moistened with distilled water
- Time after start of exposure: 24 hour

Duration of exposure:

24 hours

Doses:

- Dose level: 2000 mg/kg bodyweight
- Dose Volume: 1.97 ml/kg (based on specific gravity of the test substance of 1.016)

No. of animals per sex per dose:

5 male, 5 female

Control animals:

not required

Details on study design:

- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: ½, 1, 2 and 4 hours after dosing and subsequently once daily
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs, body weight

Statistics:

Using the mortality data obtained, an estimate of the acute dermal median lethal dose (LD50) of the test item was made.

Key result

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Mortality:

There were no deaths.

Clinical signs:

other: There were no signs of systemic toxicity.

Gross pathology:

No abnormalities were noted at necropsy.

Other findings:

Signs of dermal irritation noted were very slight to well-defined erythema, very slight to slight oedema, haemorrhage of dermal capillaries, blanching of the skin, light brown discolouration of the epidermis, loss of skin elasticity, crust formation, small superficial scattered scabs, scab lifting at edges to reveal dried blood and scab lifting to reveal glossy skin.

Dermal Reactions

Animal	Erythema	Oedema
1-0 Male	2 - reversible by day 7	2 - reversible by day 5
1-1 Male	2 - reversible by day 10	1 - reversible by day 6
1-2 Male	2 - reversible by day 8	1 - reversible by day 5
1-3 Male	2 - reversible by day 11	1 - reversible by day 6
1-4 Male	2 - reversible by day 9	2 - reversible by day 6
2-0 Female	2 - reversible by day 9	2 - reversible by day 9
2-1 Female	2 - reversible by day 7	2 - reversible by day 5
2-2 Female	2 - reversible by day 10	2 - reversible by day 5
2-3 Female	2 - reversible by day 10	2 - reversible by day 7
2-4 Female	2 - reversible by day 7	1 - reversible by day 5

Erythema

2 - Well-defined erythema

Oedema

2 - Slight oedema (edges of area well-defined by definite raising)

1 - Very slight oedema (barely perceptible)

Interpretation of results:

GHS criteria not met

Conclusions:

The acute dermal LD50 was >2000 mg/kg bodyweight.

Executive summary:

The acute dermal toxicity of CAS#10595 -49 -0 was assessed in the Wistar strain rat. The method was designed to be compatible with OECD 402 and Method B3 Acute Toxicity (Dermal) of EC No. 440/2008.

A group of ten animals (five males and five females) was given a single, 24 hour, semi-occluded dermal application of the undiluted test item to intact skin at a dose level of 2000 mg/kg bodyweight. Clinical signs and bodyweight development were monitored during the study. All animals were subjected to gross necropsy.

There were no deaths. There were no signs of systemic toxicity. Signs of dermal irritation noted were very slight to well-defined erythema, very slight to slight oedema, haemorrhage of dermal capillaries, blanching of the skin, light brown discolouration of the epidermis, loss of skin elasticity, crust formation, small superficial scattered scabs and scab lifting to reveal dried blood or glossy skin.

Animals showed expected gains in bodyweight, except for one female which showed bodyweight loss during the first week but expected gain in bodyweight during the second week. No abnormalities were noted at necropsy.

The acute dermal median lethal dose (LD50) of the test item in the Wistar strain rat was found to be greater than 2000 mg/kg bodyweight.

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed

Dose descriptor:

LD50

Value:

2 000 mg/kg bw

Quality of whole database:

Sufficient to meet data requirements. The study is Klimisch 1.

Justification for classification or non-classification

Based on the available acute studies conducted on the substance and an analogue, classification is not justified.