Reaction mass of Disodium decyl(sulphonatophenoxy)benzenesulphonate and Disodium oxybis[decylbenzenesulphonate]

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Link to relevant study record(s)

Reference

Endpoint:

relative self-ignition temperature (solids)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

September 30, 2016 to December 19, 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.16 (Relative Self-Ignition Temperature for Solids)

Deviations:

no

GLP compliance:

yes

Specific details on test material used for the study:

Identity: EC# 915-640-4
Physical state: White powder
Storage conditions: Room temperature (15 to 25°C)
Batch number: YY00F3RL01-Dry
Purity: Mixture
Expiry date: 28 June 2017

Key result

Relative self-ignition temperature:

> 400 °C

Remarks on result:

no self ignition observed under the test conditions

Remarks:

Test material did not self-ignite when heated to 400 deg C.

Results:

There were exotherms evident above 200°C, consistent with the observations in the melting temperature test, but no self-ignition.

Conclusions:

EC# 915-640-4 was found not to self-ignite below 400°C.

Executive summary:

A relative self-ignition temperature for solids test was conducted on the test material. If the heat developed either by reaction of a substance with oxygen, or by exothermic

decomposition, is not lost rapidly enough to the surroundings, self-heating, leading to self-ignition, occurs. Self-ignition therefore occurs when the rate of heat production exceeds the rate of heat loss.

The self-ignition temperature is defined as the minimum temperature, expressed in degrees Celsius (°C), at which a certain quantity of a substance will ignite under defined conditions. In accordance with the Directive, the self-ignition temperature in this test will be taken as the oven temperature at which the sample temperature reaches 400°C by self-heating.

The following apparatus were used for the test:

Carbolite furnace with natural air circulation and explosion relief.

Standard K-type thermocouples for temperature measurement.

Open topped 20 mm cube made from stainless steel wire mesh with 0.045 mm openings.

PICO ADC16 data logger with PICOLOG data logging software.

Calibration: The furnace controller display is regularly calibrated against a standard thermometer. Instrument readings collected by the software are scaled from data points manually entered.

The mesh cube was filled with test item by tapping gently and adding more until the cube was full. The cube was then suspended in the centre of the furnace at room temperature and a thermocouple placed in the centre of the cube. Another thermocouple was placed midway between the furnace wall and the cube in order to monitor the furnace temperature. The temperature of the furnace and sample were then continuously recorded while the temperature of the furnace was increased at a rate of 0.5°C/min to 400°C.

There were exotherms evident above 200°C, consistent with the observations in the melting temperature test, but no self-ignition. EC# 915-640-4 was found not to self-ignite below 400°C.

Description of key information

EC# 915-640-4 was found not to self-ignite below 400°C.