Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
15 dec 2017
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation
Justification for type of information:
The study has been conducted according to guidance on NCS (Natural Complex Substance). The substance is adequately caracterised. Therefore full validation applies.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report date:
2017

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: internal method : see description below
Principles of method if other than guideline:
The test item is a UVCB as a mixture of constituents and transition from liquid to solid will not be sharp. The „Guidance on information requirements and chemical safety assessment Chapter R.7a: Endpoint specific guidance” from ECHA (2008), mentioned that "Melting points are not normally carried out for mixtures“. In addition, according to column 2, point 7.2 of Annex VII of Regulation (EC) 1907/2006 (REACH), "The study does not need to be conducted below a lower limit of -20°C“.
Therefore it is recommended in the EFFA/EFEO guideline „The Registration for REACH of Natural Complex Substances used as Fragrance Ingredients” to describe the state of the essential after equilibrium at +20°C, +5°C and -20°C.
GLP compliance:
no
Type of method:
other: state after equilibrium at +20°C, +5°C and -20°C.

Test material

1
Reference substance name:
Thyme, Thymus zygis, ext.
EC Number:
285-397-0
EC Name:
Thyme, Thymus zygis, ext.
Cas Number:
85085-75-2
Molecular formula:
not relevant for a UVCB substance
IUPAC Name:
Thyme, Thymus zygis, ext.
Test material form:
liquid: volatile
Details on test material:
UVCB

Results and discussion

Melting / freezing point
Key result
Melting / freezing pt.:
< -20 °C
Decomposition:
no
Sublimation:
no

Applicant's summary and conclusion

Conclusions:
The freezing point of the test item is below -20°C.