[No public or meaningful name is available]

Auto flammability

Link to relevant study record(s)

Reference

Endpoint:

relative self-ignition temperature (solids)

Type of information:

other: Expert Assessment

Remarks:

Expert Assessment

Adequacy of study:

key study

Study period:

07 October 2021

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Cinnamidopropyl trimethyl ammonium chloride has been assessed for the self-ignition temperature endpoint. The assessment is based on the physical properties of the substance.

Qualifier:

no guideline required

Principles of method if other than guideline:

An assessment was performed based on the examination of the physical properties of the test substance Cinnamidopropyl trimethyl ammonium chloride.

GLP compliance:

no

Key result

Remarks on result:

other: Based on the expert assessment conducted on the test substance Cinnamidopropyl trimethyl ammonium chloride, an interaction between the substance and air in which the substance would self-heat is highly unlikely.

Endpoint Assessment Report
Self-Ignition Temperature

Introduction

Cinnamidopropyl trimethyl ammonium chloride (IUPAC: 1-propanaminium, N,N,N-trimethyl-3-(1-oxo-3-phenyl-2-propenyl)amino-, chloride) has been assessed for the self-ignition temperature endpoint. The assessment is based on the physical properties of the substance.

Assessment: Self-Ignition Temperature

Cinnamidopropyl trimethyl ammonium chloride is observed to be a deliquescent substance. According to IUPAC this means that the vapour pressure of the saturated aqueous solution of the substance is less than the vapour pressure of water in the air. When the water vapour is collected by the pure solid compound, a mixture of the solid and liquid or an aqueous solution of the compound forms until the substance is dissolved and is in equilibrium with its environment (IUPAC Gold Book). Self-ignition temperature measures the ability of solid substance to react with air and, without an energy supply, self-heat. As Cinnamidopropyl trimethyl ammonium chloride is deliquescent it absorbs water from the air and dissolves. This means that an interaction between the substance and air in which the substance would self-heat is highly unlikely.
The solid substance readily absorbs water and, during various experimental studies, the substance was noted to be a viscous liquid, therefore auto- flammability may be a more relevant endpoint. However, according to column 2 of Annex VII of REACH; the study does not need to be conducted for liquids that are not flammable in air, e.g no flashpoint up to 200 °C. The flashpoint of the liquid was determined to be >200 °C for Cinnamidopropyl trimethyl ammonium chloride and therefore the auto-flammability is not a property of concern for this substance.

Conclusion

Cinnamidopropyl trimethyl ammonium chloride is observed to be a deliquescent substance. The solid substance readily absorbs water and as a result the interaction between the substance and air in which the substance would self-heat is highly unlikely. The substance is noted to be a viscous liquid and therefore auto-flammability was considered as a more relevant endpoint compared to self- ignition. The flashpoint of the liquid was determined to be >200 °C and thus auto-flammability is not a relevant property of this substance and the endpoint can be waived for the purpose of REACH based on column 2 of Annex VII.

IUPAC Gold book – Definition of deliquescent https://goldbook.iupac.org/terms/view/D01582 accessed 10th August 2021

 

Conclusions:

The flashpoint of the liquid was determined to be >200 °C and thus auto-flammability is not a relevant property of this substance and the endpoint can be waived for the purpose of REACH based on column 2 of Annex VII.

Executive summary:

Cinnamidopropyl trimethyl ammonium chloride has been assessed for the self-ignition temperature endpoint. The assessment is based on the physical properties of the substance. 

Cinnamidopropyl trimethyl ammonium chloride is observed to be a deliquescent substance. According to IUPAC this means that the vapour pressure of the saturated aqueous solution of the substance is less than the vapour pressure of water in the air. When the water vapour is collected by the pure solid compound, a mixture of the solid and liquid or an aqueous solution of the compound forms until the substance is dissolved and is in equilibrium with its environment. Self-ignition temperature measures the ability of solid substance to react with air and, without an energy supply, self-heat. As Cinnamidopropyl trimethyl ammonium chloride is deliquescent it absorbs waterfrom the air and dissolves. This means that an interaction between the substance and air in which the substance would self-heat is highly unlikely.
The solid substance readily absorbs water and, during various experimental studies, the substance was noted to be a viscous liquid, therefore auto- flammability may be a more relevant endpoint. However, according to column 2 of Annex VII of REACH; the study does not need to be conducted for liquids that are not flammable in air, e.g no flashpoint up to 200 °C. The flashpoint of the liquid was determined to be >200 °C for Cinnamidopropyl trimethyl ammonium chloride and therefore the auto-flammability is not a property of concern for this substance.

The flashpoint of the liquid was determined to be >200 °C and thus auto- flammability is not a relevant property of this substance and the endpoint can be waived for the purpose of REACH based on column 2 of Annex VII.

 

Description of key information

The flashpoint of the liquid was determined to be >200 °C and thus auto-flammability is not a relevant property of this substance and the endpoint can be waived for the purpose of REACH based on column 2 of Annex VII.