1,4-Benzenedisulfonic acid, 2,2'-[1,2-ethenediylbis[(3-sulfo-4,1-phenylene)imino[6-[3-substituted-heteroalkyl]-1,3,5-triazine-4,2-diyl]imino]]bis-, sodium salt

Acute Toxicity: inhalation

Administrative data

Endpoint:

acute toxicity: inhalation

Type of information:

migrated information: read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: see 'Remark'

Remarks:

Particle size not specified. The analogous substance, part of the Stilbene Fluorescent Withening Agents, group 3, is the acid form of the disulphonated derivative dihydroxyethyl derivative, therefore contains the same organic functional groups, but due to the sulphonation/salification degree it is less soluble. This property makes of Read Across substance 4404-43-7 a conservative representative because of the potential higher bioavailability. Justification for Read Across is reported in the endpoint summary and in the Category Justification Report attached in Section 13.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1976

Report date:

1976

Materials and methods

Test guideline

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 403 (Acute Inhalation Toxicity)

Deviations:

yes

Remarks:

particle size not specified

GLP compliance:

no

Test type:

standard acute method

Limit test:

no

Test material

Test material information

Constituent 1

Test animals

Species:

rat

Strain:

Wistar

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Winkelmann, Borchen, Germany
- Weight at study initiation: 180 - 200 g

Administration / exposure

Route of administration:

inhalation: dust

Type of inhalation exposure:

not specified

Vehicle:

air

Analytical verification of test atmosphere concentrations:

yes

Remarks:

gravimetric with membrane filter.

Duration of exposure:

1 - 4 h

Concentrations:

163.3, 375, 1225 and 1895 mg/m³ air at 4 hour exposure
1820 mg/m³ air at 1 hour exposure

No. of animals per sex per dose:

10

Control animals:

no

Details on study design:

- Duration of observation period following administration: 14 days
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs

Results and discussion

Effect levels

Effect levels 1

Sex:

male/female

Dose descriptor:

LC50

Effect level:

> 1 895 mg/m³ air (nominal)

Based on:

test mat.

Exp. duration:

4 h

Effect levels 2

Sex:

male/female

Dose descriptor:

LC50

Effect level:

1 820 mg/m³ air (nominal)

Based on:

test mat.

Exp. duration:

1 h

Mortality:

No mortality occurred during the study period.

Clinical signs:

other: At concentrations of 1225 and 1895 mg/m³ air at the 4 hour exposure the animals showed a decreased general condition for about 4 - 6 hours.

Gross pathology:

No abnormalities detected.

Applicant's summary and conclusion

Interpretation of results:

not classified

Remarks:

Migrated information . Criteria used for interpretation of results: EU

Conclusions:

LC50 (4 h): > 1.895 mg/L air

Executive summary:

Method

Acute inhalation toxicity was assessed following the method described into the OECD guideline 403.

Results

LC50 (4 h): > 1.895 mg/l air

LC50 (1 h): 1.820 mg/l air

Conclusion

According to CLP Regulation (EC 1272/2008), 3.1 Acute toxicity section, substances can be allocated to one of four toxicity categories based on acute toxicity by the oral, dermal or inhalation route according to the numeric criteria. Acute toxicity values are expressed as (approximate) LD50 (oral, dermal) or LC50 (inhalation) values or as acute toxicity estimates (ATE).

The inhalation LD50 valueclassification limit for dust is 5.0 mg/l (category 4: 1.0 < ATE ≤ 5.0 mg/l). In the current test an LD50 was non identified; considering the fact that no mortality occurred, a classification category can not be assigned. Thus, a classification according to the CLP Regulation (EC 1272/2008) is not applicable.