1,6-Hexanediamine, N1,N6-bis[2,2-dimethyl-3-(4-morpholinyl)propylidene]-

Endpoint summary

Additional information

Appearance/physical state/color

At ambient conditions, SIKA Hardener MH is an almost colourless and nearly odourless liquid.

 

Melting point/freezing point

The determination of the melting / freezing point of Sika Hardener MH was performed according to OECD Guideline 102 resp. EU Method A.1 resp. OPPTS 830.7200. The determination was performed in duplicate. In both determinations, a melting range was detected. The melting range was determined as -49.7 to -42.5 °C (223.5 to 230.7 K). This value is the mean of two independent determinations.

 

Boiling point

The determination of the boiling point of Sika Hardener MH was performed according to OECD Guideline 103 resp. EU Method A.2 resp. OPPTS 830.7220. The boiling point was determined as 293.4 °C (566.6 K). This value was the mean of two independent determinations. The test item showed signs of decomposition.

 

Density

The determination of the density of Sika Hardener MH was performed according to OECD Guideline 109 resp. EU Method A.3 resp. OPPTS 830.7300. Using the pycnometer method, a density of 0.9671 ± 0.0000 g/cm³ at 20 ± 0.2 °C was measured. This value was the mean of two independent determinations ± the error of determination. The standard deviation was determined to be 0.0002 g/cm³, showing a good correlation of the two determinations. The relative density was determined to be 0.9671 at 20 °C.

 

Particle size distribution (Granulometry)

In accordance with column 2 of REACH Annex VII, the test on particle size distribution (required in section 7.14) was waived, as the substance is marketed or used in non-solid or non-granular from only. SIKA Hardener MH is a liquid at room temperature (20 °C).  

 

Vapour pressure

The vapour pressure of the test item was determined to be 0.00469 Pa at 20 °C and 0.00554 Pa at 25 °C, respectively.

 

Partition coefficient

The log Pow of the test item was determined to be 1.106 ± 0.000 (95 % confidence interval) in a OECD 117 study. The estimated Pow was 12.764 ± 0.000 (95 % confidence interval).

 

Water solubility 

Due to the immediate hydrolysis of Sika Hardener MH upon contact with water experimental determination of the water solubility was technically not feasible. Experimental determination of the water solubility was replaced with the available data on the water solubility of the two hydrolysis products. For Aldehyde M, CAS 23588-51-4, no experimental determination of the water solubility was technically possible, therefore, the water solubility was estimated using QSAR to be 22.31 g/L at 25 °C. The water solubility of the second hydrolysis product, Hexamethylenediamine, CAS 124-09-4, was experimentally determined to be 637 g/L at 20 °C. Based on a weight of evidence approach, as worst case the water solubility of Aldehyde M was chosen as key value for further risk assessment.

 

Surface tension

The determination of the surface tension of an aqueous solution of Sika Hardener MH was performed according to OECD Guideline 115 resp. EU Method A.5. The surface tension of an aqueous solution of the test item Sika Hardener MH was determined as 60.14 ± 0.57 mN/m at 20 ± 0.3 °C. One measurement was performed for verification (after 69 minutes), resulting in a value of 60.95 ± 0.13 mN/m. No significant changes and thus no significant dependence on time were observed. As both values were higher than 60 mN/m, Sika Hardener MH was classified as not surface active.

 

Flash point

The determination of the flash point of Sika Hardener MH was performed according to EU Method A.9, OPPTS 830.6315 and UN Manual Test Methods 32.4 Three independent determinations were performed. The maximum variation was 3 K. Therefore, the lowest two values (which showed a variation of 2 K) were used for calculation of the mean. The flash point of Sika Hardener MH was determined to be 148.5 °C.

 

Auto flammability

The determination of the auto-ignition temperature of Sika Hardener MH was performed according to EU Method A.15, Five independent determinations were performed. An auto-ignition temperature of 262 °C was determined. This value is the lowest value of three independent determinations and the higher temperatures of two determinations were discarded. The auto-ignition temperature (rounded) according to EU Method A.15 of Sika Hardener MH is 260 °C.

 

Flammability

The substance has not to be classified as flammable gas, flammable liquid, flammable solid, flammable in contact with water, flammable aerosol, pyrophoric solid, pyrophoric liquid or self-heating substance.

 

Explosiveness

The test method for the determination of the explosive properties of a substance as described for liquid materials in test guideline A.14 of Regulation (EC) No 440/2008 was replaced by a theoretical based evaluation. The chemical structure of SIKA Hardener MH does not contain chemical groups or structural elements in the molecule, which may lead to the conclusion that explosive properties have to be expected. Therefore, explosive properties are not expected. No experimental determination was performed.

 

Oxidising properties

The test item has not to be classified as oxidising solid, oxidising liquid or oxidising gas.