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Link to relevant study record(s)

Reference
Endpoint:
flammable solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018-07-17 to 2018-08-15
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
UN Manual of Tests and Criteria: Test N.1 (Test method for readily combustible solids)
Version / remarks:
2015
Deviations:
no
GLP compliance:
yes (incl. certificate)
Key result
Test procedure:
burning rate test: preliminary screening test
Remarks on result:
substance does not ignite and propagate combustion either by burning with flame or smouldering along 200 mm of the powder train within the 2 minutes test period

The test item 2H-lsoindole-2-ethanesulfonic acid, 1,3-dihydro-1,3-dioxo-, potassium salt (1:1) (TA-1) was tested as received and not modified in any way. The flammability of the test item was determined by ignition of a powder train with a length of 250 mm and a triangular cross-section of 10 mm height and 20 mm width with the hot flame of a gas burner. The test item 2H-lsoindole-2-ethanesulfonic acid, 1,3-dihydro-1,3-dioxo-, potassium salt (1:1) (TA-1) was not flammable within 2 minutes by the flame of a butane gas burner within the ignition zone (the first 50 mm of the formed test item). When the white test item was directly exposed to the hot burner flame, it melted into a low-viscous liquid, which turned light brown to black and carbonized. After removing the burner flame, slight smoke formation was observed temporarily. After cooling down, the test item appeared as a black, solid and carbon-like residue.

Interpretation of results:
other: ‘Not readily combustible solid of Division 4.1'
Conclusions:
The test item 2H-lsoindole-2-ethanesulfonic acid, 1,3-dihydro-1,3-dioxo-, potassium salt (1:1) (TA-1) is a ‘Not readily combustible solid of Division 4.1’ according to test guideline UN Test N.1., Section 33.1, UN-MTC (2015).

Description of key information

The test item 2H-lsoindole-2-ethanesulfonic acid, 1,3-dihydro-1,3-dioxo-, potassium salt (1:1) (TA-1) is a ‘Not readily combustible solid of Division 4.1’ according to test guideline UN Test N.1., Section 33.1, UN-MTC (2015).

Key value for chemical safety assessment

Flammability:
not classified

Additional information

Justification for classification or non-classification

The test item 2H-lsoindole-2-ethanesulfonic acid, 1,3-dihydro-1,3-dioxo-, potassium salt (1:1) (TA-1) has not be classified as flammable solid.