Pyrolytic lignin

Appearance / physical state / colour

Administrative data

Endpoint:

appearance / physical state / colour

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Oct 2020

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Cross-reference

Reason / purpose for cross-reference:

reference to same study

Remarks:

observations made in guideline study

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Oct-Nov 2020

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

July 1995

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Version / remarks:

May 2008

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Key result

Melting / freezing pt.:

< -65 °C

pre-test result:

At 3.8°C: liquid;

At -19,8°C: appeared to be frozen when touching the surface with the wire,

At -80°C: solid

main test result:

in all three DSC measurements no exothermic event could be detected. No freezing/melting point can be detected under these circumstances until the detection limit of -65°C.

Conclusions:

No freezing/melting point could be determined by measurement with DSC until the detection limit of -65°C.

Executive summary:

The test was carried out according to OECD guideline 102 and EC method A.1. The determination of freezing/melting point of BTG Pyrolytic Lignin was determined via DSC (differential scanning calorimetry).

Referring to the pre-test the freezing/melting point should be between 5 °C and -20 °C (nominal temperatures) as the test item appeared to be solid at an evaluation temperature of -19.8 °C and was solid at -80 °C.

In all three DSC measurements no exothermic event during the cooling down phase until – 65°C and no endothermic event in the heating up phase could be detected.

Based on the properties of this UVCB substance the results of the pre-test indicate that the test item will increase in viscosity and will therefore have an appearance to be frozen. The DSC measurements confirms that there is no phase change untill the detection limit of -65°C

Therefore, no freezing/melting point can be determined under these circumstances.

Materials and methods

GLP compliance:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Low molecular weight organic substances from fast pyrolysis bio-oil

IUPAC Name:

Low molecular weight organic substances from fast pyrolysis bio-oil

Constituent 2

Reference substance name:

Monomers from fast pyrolysis bio-oil

IUPAC Name:

Monomers from fast pyrolysis bio-oil

Constituent 3

Reference substance name:

Dimers from fast pyrolysis bio-oil

IUPAC Name:

Dimers from fast pyrolysis bio-oil

Constituent 4

Reference substance name:

Trimers from fast pyrolysis bio-oil

IUPAC Name:

Trimers from fast pyrolysis bio-oil

Constituent 5

Reference substance name:

Higher oligomers from fast pyrolysis bio-oil

IUPAC Name:

Higher oligomers from fast pyrolysis bio-oil

Constituent 6

Reference substance name:

Water

EC Number:

231-791-2

EC Name:

Water

Cas Number:

7732-18-5

Molecular formula:

H2O

IUPAC Name:

water

Test material form:

liquid: viscous

Remarks:

Brown /black highly vicous liquid

Results and discussion

Physical state at 20°C and 1013 hPa:

liquid

Form / colour / odour

Key result

Form:

liquid: viscous

Remarks:

highly viscous

Colour:

brown/black

Substance type:

organic

Applicant's summary and conclusion

Conclusions:

The test item is a brown/black highly viscous liquid made from wood pyrolysis.