1H-Benz[e]indolium, 1,1,2,3-tetramethyl-, 4-methylbenzenesulfonate (1:1)

Acute Toxicity: oral

Administrative data

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Test accoding to GLP and the study procedures described in this report were based on the most recent OECD and EC guidelines.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2015

Report date:

2015

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 423 (Acute Oral toxicity - Acute Toxic Class Method)

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method B.1 tris (Acute Oral Toxicity - Acute Toxic Class Method)

Test guideline 3

Qualifier:

according to guideline

Guideline:

EPA OPPTS 870.1100 (Acute Oral Toxicity)

GLP compliance:

yes (incl. QA statement)

Test type:

acute toxic class method

Test material

Test material information

Constituent 1

Reference substance name:

1,1,2,3-tetramethyl-1H-benzo[e]indol-3-ium 4-methylbenzene-1-sulfonate

Cas Number:

141914-99-0

Molecular formula:

C23H25NO3S

IUPAC Name:

1,1,2,3-tetramethyl-1H-benzo[e]indol-3-ium 4-methylbenzene-1-sulfonate

Test material form:

solid: particulate/powder

Remarks:

migrated information: powder

Details on test material:

Identification: V173520
Appearance: White powder (determined by WIL Research Europe)
Batch: AN
Purity/Composition: Not indicated
Test substance storage: At room temperature
Stable under storage conditions until: 20 April 2017 (expiry date)

Chemical name (IUPAC), synonym or trade name: 1,1,2,2-tetramethyl-1H-Benz(e)indolium 4- methylbenzenesulfonate
CAS Number: 141914-99-0
Molecular formula: C23H25NO3S
Molecular weight: 395.53
pH (1% in water, indicative range) : 4.1 – 4.03 (determined by WIL Research Europe B.V. )
Solubility in vehicle: Water: > 10% (NTU >>>)
Stability in vehicle: Water: Unkown

Test animals

Species:

rat

Strain:

Wistar

Sex:

female

Details on test animals or test system and environmental conditions:

Species: Rat, Wistar strain Crl:WI (Han) (outbred, SPF-Quality). Recognized by international guidelines as the recommended test system (e.g. OECD, EC).
Source: Charles River Deutschland, Sulzfeld, Germany.
Number of animals: 12 Females (nulliparous and non-pregnant). Each dose group consisted of 3 animals.
Age and body weight: Young adult animals (approx. 8-10 weeks old) were selected. Body weight variation did not exceed +/- 20% of the sex mean.
Identification: Earmark and tail mark
Health inspection: At least prior to dosing. It was ensured that the animals were healthy and without any abnormality that might affect the study integrity.

Animal husbandry

Conditions
Environmental controls for the animal room were set to maintain 18 to 24°C, a relative humidity of 40 to 70%, at least 10 air changes/hour, and a 12-hour light/12-hour dark cycle. Any variations to these conditions were maintained in the raw data and had no effect on the outcome of the study.
Accommodation
Group housing of 3 animals per cage in labeled Makrolon cages (MIV type; height 18 cm.) containing sterilized sawdust as bedding material (Lignocel S 8-15, JRS - J.Rettenmaier & Söhne GmbH + CO. KG, Rosenberg, Germany) and paper as cage-enrichment (Enviro-dri, Wm. Lillico & Son (Wonham Mill Ltd), Surrey, United Kingdom).
Acclimatization period was at least 5 days before start of treatment under laboratory conditions.

Diet
Free access to pelleted rodent diet (SM R/M-Z from SSNIFF Spezialdiäten GmbH, Soest, Germany).

Water
Free access to tap water.

Diet, water, bedding and cage enrichment evaluation for contaminants and/or nutrients was performed according to facility standard procedures. There were no findings that could interfere with the study.

Administration / exposure

Route of administration:

oral: gavage

Vehicle:

water

Remarks:

Elix, Millipore S.A.S., Molsheim, France

Details on oral exposure:

The preparations (w/w) were kept at room temperature and were dosed within 4 hours after adding the vehicle to the test substance. Homogeneity was obtained to visually acceptable levels and the formulations were stirred during dosing, which ensures homogeneity sufficient for these kinds of studies.
No correction was made for purity of the test substance.
The concentration of the test substance in vehicle was varied to allow constant dosage volume in terms of mL/kg body weight.

Doses:

2000 mg/kg (10 mL/kg) body weight.
300 mg/kg (10 mL/kg) body weight.
50 mg/kg (10 mL/kg) body weight.

Details on study design:

The toxicity of the test substance was assessed by stepwise treatment of groups of 3 females. The first group was treated at a dose level of 2000 mg/kg. The absence or presence of mortality of animals dosed at one step determined the next step, based on the test procedure defined in the guidelines. The onset, duration and severity of the signs of toxicity were taken into account for determination of the time interval between the dose groups.

Results and discussion

Effect levels

Sex:

female

Dose descriptor:

LD50

Effect level:

50 - 300 mg/kg bw

Based on:

test mat.

Remarks on result:

other: According to the OECD 423 test guideline, the LD50 cut-off value was considered to be 200 mg/kg body weight.

Mortality:

At 2000 mg/kg, all animals were found dead on Day 1.
At 300 mg/kg, all animals were found dead on Day 2.
At 50 mg/kg, no mortality occurred.

Clinical signs:

other: At 2000 mg/kg, hunched posture was noted on Day 1. At 300 mg/kg, tremors, hunched posture, shallow respiration and/or piloerection were noted on Day 1. At 50 mg/kg, hunched posture and piloerection were noted for all animals on Days 1 and/or 2.

Gross pathology:

No abnormalities were found at macroscopic post mortem examination in all animals.
Autolysis was noted for the animals found dead treated at 300 mg/kg. This was considered not toxicologically relevant.

Applicant's summary and conclusion

Interpretation of results:

Toxicity Category III

Remarks:

Migrated information Criteria used for interpretation of results: EU

Conclusions:

According to the Regulation (EC) No 1272/2008 on classification, labelling and packaging of
substances and mixtures (including all amendments), V173520 should be classified as Category 3 and should be labeled as H301: Toxic if swallowed.