Lavender, Lavandula hybrida, ext.

Endpoint summary

Description of key information

The substance belongs to a group of Natural Complex Substances (NCS) : UVCB sub-type 3, where the source is biological and the process is refinement (See ECHA Guidance on Identification and naming of substances under REACH); such as: exudates, resinoids and concretes that are well-known to be very difficult to analytically assess. These complex UVCB substances contain a large number of constituents with different volatility and solubility (mostly low solubility); the composition can be widely unknown and being (mostly) solid(ish) and/or extremely viscous resins their physical state leads to further difficulties for testing.

 

Considering the very complex nature of the test item (UVCB, very viscous, composed of about 40% of unknown constituents), physico-chemical properties of the registered substance were determined from experimental testing when possible. Some endpoints were waived, based on the experience in handling and use of the substance and on the chemical structure of the known constituents. We also considered waiving based on the technical issues due to the complex nature of such UVCB substance especially when the information obtained from testing was not relevant or of practical use and irrelevant for subsequent assessments.

The substance is a dark green/brown pasty solid substance with a low pour point (39 +/- 3°C). It is expected to float over water, because of its low relative density (0.979). The substance contains constituents having different water solubilities.

It contains volatile constituents (known constituents have a vapour pressure between 0.011 Pa and 253 Pa), but the measured vapour pressure exhibit only low volatility (13,18 Pa) in the experimental conditions.

No hazard was identified with regard to physical properties (flammability,explosivity, oxidising properties, self-heating substance) based on Regulation (EC) 1272/2008 (CLP regulation) but it is classified as COMBUSTIBLE LIQUID Cat.4 according to GHS.

Additional information

Summary of relevant physico-chemical properties:

Endpoint (method)	Data
Appearance at 20°C and 1 atm. (based on pour point and visual observation)	The substance is considered as a dark green/brown pasty solid substance.
Melting/Freezing point (OECD 102/EU A1, pour point)	Pour point = 39.0 ± 3 °C (312 ± 3 K).
Boiling point (OECD 103/EU A2, DSC)	The test item has been determined to partially boiled with decomposition from 206 ± 2°C (479 ± 2 K) at 99.0 kPa.
Rlelative density (OECD 109/EU A3, pycnometer)	D20/4 = 0.979 less dense than water
Granulometry (data waiving)	study scientifically not necessary (not granular powder)
Vapour pressure (OECD 104/EU A4, dynamic method)	13.179 Pa at 20°C in the experimental conditions The Vapour Pressure of the known constituents of the substance (<65% of the composition) are ranging between 0.011 Pa and 253 Pa at 25°C
Log Kow  (data waiving)	Waiving based on technical feasibility. Calculated values were provided on known constituents of the substance, what represent a low part of the composition of the substance (<65%) and then which is not representative of the substance.
Water solubility  (data waiving)	Waiving considering the very complex nature of the test item, the information obtained from testing is considered as not relevant or of practical use for subsequent assessments
Surface tension (data waiving)	Waived based on chemical structure of the known constituents of the substance, not characteristic of true surfactants and considering that it is not the intended use of the substance (i.e. not a desired property).
Auto-ignition temperature (EU A15/IEC 79 -4)	Auto-ignition of the test item was determined as 280+/ 5 °C (96.4 kPa).
Flammability Flash-point (EU A9, ISO 3679, ASTM D3278, equilibrium closed cup)  Flammability(N.1 readily combustible solids)   Flammability water&air (data waiving) Self-heating substances/mixtures (data waiving)	Flash point of 79.0°C: NOT a flammable liquid under CLP (but COMBUSTIBLE LIQUID Cat.4 according to GHS) Note that the result obtained on this kind of substance should be largely influence by small amounts of volatile constituents and the result doesn't represent the major part of the substance.   No ignition in contact with a flame: NOT a flammable solid (CLP/GHS).   Waived based on experience in handling and use and chemical structure of known constituents of the substance. NOT flammable if contact with air or water Waived based on low melting point. NO self-heating substance anticipated.
Explosive properties (data waiving)	Waiving based on experience on this type of substance and chemical structure of known constituents. Low potential for explosive properties
Oxidising properties (data waiving)	Waiving based on technical issue and chemical structure of known constituents of the substance. Registered substance is considered to have low potential for oxidizing properties.

Slight variations are possible with composition (UVCB substance).