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The Substance Fatty acids, C14-18 and C16-18-unsatd., zinc salts is a white, odourless solid with a melting point of 101°C. The substance "Fatty acids, C16-18, zinc salts", relevant for read across to "Fatty acids, C14-18 and C16-18unsatd., zinc salts", has a melting point of 121°C and starts decomposing at approximately 330°C before boiling, therefore no boiling point could be determined. A similar behaviour is assumed for "Fatty acids, C14-18 and C16-18unsatd., zinc salts" as the melting points of both substances are similar. The relative density of Fatty acids, C14-18 and C16-18-unsatd., zinc salts is 1.05. As the substance is a salt with a melting point of 101°C, vapour pressure can be safely assumed to be negligible, i. e. below the level of relevance (10-5Pa). Fatty acids, C14-18 and C16-18-unsatd., zinc salts is not surface-active. The solubility of Fatty acids, C14-18 and C16-18-unsatd., zinc salts resulted in 0.214 mg/L dissolved zinc. The partition coefficient of this substance is not considered to be relevant. Fatty acids, C14-18 and C16-18-unsatd., zinc salts is not flammable. Flash point, explosive properties, self-ignition temperature, oxidising properties, stability in organic solvents and identity of relevant degradation products as well as dissociation constant and viscosity are not relevant for this substance in accordance with column 2 of the respective sections of Regulation (EC) No 1907/2006, Annexes VII to IX or Annex XI, section 1. The granulometry of a representative test material is summarized as follows:

D10 = ca. 25 µm

D50 = ca. 310 µm

D90 = ca. 596 µm

Substance Fatty acids, C14-18 and C16-16-unsatd., zinc salts does not need to be classified for physico-chemical properties, neither according to Directive 67/548 EEC nor to CLP Regulation (EC) No 1272/2008. Fatty acids, C14-18 and C16-16-unsatd., zinc salts is not flammable, explosive properties are considered non-relevant for Fatty acids, C14-18 and C16-16-unsatd., zinc salts based on lack of functional groups and oxidizing properties are considered non-relevant based on the chemical structure of the substance. In the long experience with substance, Fatty acids, C14-18 and C16-16-unsatd., zinc salts, no indications on metal corrosivity became evident

The substance "Fatty acids, C16-18, zinc salts (CAS# 91051-01-3), relevant for read-across to C14-18 and C16-18-unsatd., zinc salts, went through the EU Risk Assessment. Conclusions from EU RAR Zinc stearate (CAS# 91051-01-3, CAS# 557-05-1) Part I - Environment (Final report R074_0805_env, May 2008) are in line with the conclusions for Fatty acids, C14-18 and C16-16-unsatd., zinc salts:

“Data on boiling point, vapour pressure, and surface tension were not provided. In view of the nature of the substance determination of these parameters is considered to be irrelevant. Information on flammability, explosive properties and oxidizing properties is not available. However, on theoretical considerations the compound is concluded to be not flammable, not explosive and not oxidizing.”