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Auto flammability

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Description of key information

The autoflammability is 275°C based on read across from Terpineol alpha, the rationale is presented below.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
275 °C

Additional information

Auto-flammability of Terpene Hydrocarbon Alcohols using read across from alpha Terpineol.


Introduction


Terpene hydrocarbon alcohols have the followingconstituent types of substances: Solely hydrocarbons-terpene type, Alcohol-type, Ketone-type and Ether-type all having a saturated or unsaturated cyclic hydrocarbon backbone.There is no experimental auto-flammability information available. According to REACH Annex XI 1.5, information can be generated by other means, i.e. applying alternative methods such as QSARs, grouping and read-across. The autoflammability information of alpha-Terpineol is used for read across.


Hypothesis: Terpenes hydrocarbon alcohols have the same auto-flammability as alpha-Terpineol.


Available information: Alpha-Terpineol is tested in an A15 (Rel. 1) test and has an experimental auto-flammability temperature of 275°C.


Target chemical and source chemical(s)


Chemical structures of the target chemical and the source chemical(s) are shown in the data matrix, including relevant physico-chemical properties.


Purity / Impurities


Not relevant.


Analogue justification


According to Annex XI 1.5 read across can be used to replace testing when the similarity can be based on a common backbone and a common functional group. When using read across the result derived should be applicable for C&L and/or risk assessment and it should be presented with adequate and reliable documentation, which is presented below.


Analogue selection: For Terpene hydrocarbon alcohols the substance alpha-Terpineol is selected as the major representative constituent and because auto-flammability information was readily available.


Structural similarities and differences: Alpha-Terpineol is an alcohol which represents the major part of the Terpene Hydrocarbon alcohols.


Physical chemical properties: For liquids the boiling point and flashpoint are the key features for flammability. Both these properties are similar for Terpene hydrocarbon alcohols and alpha-Terpineol: the boiling points are 207.8 and 218.9°C, respectively and flashpoints are 77 and 91°C, respectively. Based on these similarities for Terpenes Hydrocarbon Alcohols a similar auto-flammability as for alpha-Terpineol can be predicted and results in a value of 275°C.


Uncertainty of the predictions: There are no uncertainties other than those addressed above.


Conclusion on hazard


For Terpene hydrocarbon alcohols no experimental information is available for auto-flammability but for alpha-Terpineol, the major constituent, such information is available: 275°C, which can be used for read across.


Final conclusion: Terpene hydrocarbon alcohols have an auto-flammability of 275°C.


 


Data matrix: Terpene hydrocarbon alcohols’ characteristics and expected autoflammability supported with experimental data from alpha-Terpineol

















































































 Common names



Terpene hydrocarbon alcohols



Alpha-Terpineol


(representative constituent)



 



Target



Source



Chemical structures



Not applicable



 



CAS no.



Not applicable



95-55-5



Empirical formula



Not applicable



C10H18O



EINECS



945-149-0



202-680-6



REACH Registration



2018



2013



Molecular weight



136-154



154



Phys-Chem



 



 



Physical state



Liquid



Liquid



Boiling point (°C)



207.8



218.9



Vapour pressure in Pa



51.9



6.48



Flashpoint (°C)



77



91



Viscosity mPa



10.4



37.9



Auto-flammability (°C)



275 (Read across)



275 (A.15)



 

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