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Physical & Chemical properties

Melting point / freezing point

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Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2010
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Visual observation in line with ECHA guidance documents.
Reason / purpose for cross-reference:
reference to same study
Qualifier:
no guideline followed
Principles of method if other than guideline:
Distilled lime oil is a mixture of substances 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 mentions in chapter R7.1.2.3, that «Melting points are not normally carried out for mixtures ». 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 oil after two days at +5°C and -20 °C rather than determining a transition temperature. As it is common knowledge that citrus oils are liquid at +5 °C only a test at -25 °C was carried out in this examination.
GLP compliance:
not specified
Type of method:
other: Visual observation
Key result
Melting / freezing pt.:
< -25 °C
Remarks on result:
other: Lime oil is a mixture of substances and transition from liquid to solid will not be sharp. As it is common knowledge that citrus oils are liquid at +5 °C only a test at -25 °C was carried out in this examination. No freezing point could be derived.

Results:

Temperature

+20 °C

-25 °C for 67 h

State of sample

clear mobile liquid

clear mobile liquid with some white crystal needles

See also attached photographs.

Conclusions:
Distilled lime oil is a clear mobile liquid at 20 degrees Celsius and a clear mobile liquid with some white needles at -25 degrees Celsius after 67h.
Executive summary:

Distilled lime oil oil is a mixture of substances 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 mentions in chapter R7.1.2.3, that «Melting points are not normally carried out for mixtures ». 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 oil after two days at +5°C and -20 °C rather than determining a transition temperature. As it is common knowledge that citrus oils are liquid at +5 °C only a test at -25 °C was carried out in this examination.

Lime oil was found to be a clear mobile liquid at 20 degrees Celsius and a clear mobile liquid with some white needles at -25 degrees Celsius after 67h.

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
2010
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Visual observation in line with ECHA guidance documents.
Reason / purpose for cross-reference:
reference to same study
Qualifier:
no guideline followed
Principles of method if other than guideline:
Cold pressed lime oil is a mixture of substances 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 mentions in chapter R7.1.2.3, that «Melting points are not normally carried out for mixtures ». 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 oil after two days at +5°C and -20 °C rather than determining a transition temperature. As it is common knowledge that citrus oils are liquid at +5 °C only a test at -25 °C was carried out in this examination.
GLP compliance:
not specified
Type of method:
other: Visual observation

Results:

Temperature

+20 °C

-25 °C for 67 h

State of sample

clear mobile liquid

slightly turbid mobile liquid with crystalline precipitate

See also attached photographs.

Conclusions:
Cold pressed lime oil is a clear mobile liquid at 20 degrees Celsius and a slightly turbid mobile liquid with crystalline precipitate at -25 degrees Celsius after 67h.
Executive summary:

Cold pressed lime oil oil is a mixture of substances 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 mentions in chapter R7.1.2.3, that «Melting points are not normally carried out for mixtures ». 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 oil after two days at +5°C and -20 °C rather than determining a transition temperature. As it is common knowledge that citrus oils are liquid at +5 °C only a test at -25 °C was carried out in this examination.

lime oil was found to be a clear mobile liquid at 20 degrees Celsius and a slightly turbid mobile liquid with crystalline precipitate at -25 degrees Celsius after 67h.

Description of key information

Description of physical state: clear mobile liquid at 20 degrees Celsius. A clear mobile liquid with some white needles at -25 degrees Celsius after 67h.

Key value for chemical safety assessment

Additional information

In a key study according to the NCS protocol, distilled lime oil was found to be a clear mobile liquid at 20 degrees Celsius and a clear mobile liquid with some white needles at -25 degrees Celsius after 67h. A supporting study on cold-pressed lime oil reported that this substance is a clear mobile liquid at 20 degrees Celsius and a slightly turbid mobile liquid with crystalline precipitate at -25 degrees Celsius after 67h.