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Auto flammability

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Endpoint:
relative self-ignition temperature (solids)
Type of 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:
guideline study without detailed documentation
Justification for type of information:
REPORTING FORMAT FOR THE ANALOGUE APPROACH

1. HYPOTHESIS FOR THE ANALOGUE APPROACH
This read-across is based on the hypothesis that the source and the target substance have very similar physicochemical and (eco)toxicological properties because their chemical structures are nearly identical. An analogue approach has thus been employed. The target substance is the meta-isomer of the dye Reactive Blue 049, where the sulphonate group is bound at the meta-position of the aminobenzene moiety. The source chemical is the reaction mass of both the meta-isomer and the para-isomer of Reactive Blue 049.
The presence of sulphonate groups make both dyes highly water soluble and therefore less critical for human health and environmental issues. Based on their chemical similarity, similar properties are expected in both humans and the environment.

2. SOURCE AND TARGET CHEMICAL(S)
Source: Reactive Blue 49 meta/para (CAS# 72214-18-7 / EC# 276-481-8)
Target: Reactive Blue 49 meta (CAS# 72927-99-2 / EC# 277-040-2)

3. ANALOGUE APPROACH JUSTIFICATION
see attachment under 4.2 Melting point / freezing point
Reason / purpose:
read-across source
Relative self-ignition temperature:
> 550 °C
Remarks on result:
no self ignition observed under the test conditions
Conclusions:
The auto-ignition temperature of the test item is >550 °C
Executive summary:

The determination of the autoignition temperature of the test item was performed in accordance with the EEC Directive Annex V of 67/548 Test A 16 Auto- ignition temperature for solids. No autoignition took place up to 550 °C.

Endpoint:
relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2014
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation
Qualifier:
according to
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Version / remarks:
Although the test substance is a solid, the method for liquids was used, as it was available at laboratory. For this purpose the dye was suspended/dissolved in a small amount of water and injected into the machine. There the water was evaporated and the auto-ignition temperature of the solid was measured.
GLP compliance:
no
Relative self-ignition temperature:
> 550 °C
Remarks on result:
no self ignition observed under the test conditions
Conclusions:
The auto-ignition temperature of the test item is >550 °C
Executive summary:

The determination of the auto-ignition temperature of the test item was performed in accordance with the EEC Directive Annex V of 67/548 Test A 15 Auto-ignition temperature (Liquids and Gases). The method determines the minimum temperature of the inner surface of an enclosure that will result in ignition of a gas, vapour or liquid injected into the enclosure. Although the test substance is a solid, the method for liquids was used, as it was available at laboratory. For this purpose the dye was suspended/dissolved in a small amount of water and injected into the machine. There the water was evaporated and the auto-ignition temperature of the solid was measured.

The measurement took place in an apparatus for determination of auto-ignition temperature according to DIN 51794. The temperature of the oven and the sample were continuously recorded while the temperature of the oven was increased to approximately 550 °C at a rate of about 3- 5 °C/min. Then the test item was added drop by drop with a pipette through the cylinder hole into the Erlenmeyer flask. The auto-ignition temperature, as obtained by this method, is the minimum ambient temperature expressed in °C at which a certain volume of a substance ignites under defined conditions.

According to this test method, no auto-ignition took place up to 550 °C.

Description of key information

The auto-ignition temperature is higher than 550 °C

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
550 °C

Additional information

The determination of the auto-ignition temperature of the source substance was performed in accordance with the EEC Directive Annex V of 67/548 Test A 15 Auto-ignition temperature (Liquids and Gases). The method determines the minimum temperature of the inner surface of an enclosure that will result in ignition of a gas, vapour or liquid injected into the enclosure. Although the test substance is a solid, the method for liquids was used, as it was available at the laboratory. For this purpose the dye was suspended/dissolved in a small amount of water and injected into the machine, where the water evaporated and the auto-ignition temperature of the solid was measured.

According to this test method, no auto-ignition took place up to 550 °C. The structurally related target substance will show similar results, and will not show auto-ignition up to 550°C.