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Physical & Chemical properties

Flash point

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Description of key information

The flashpoint of polysulfide di-tert-nonyl of 144°C has been read across from di-tert-dodecyl polysulfide.

Key value for chemical safety assessment

Flash point at 101 325 Pa:
144 °C

Additional information

The flashpoint for di-tert-nonyl polysulfide has been read across from di-tert-dodecyl polysulfide. Fieseler (2010) is a GLP-compliant, closed cup flashpoint study following guideline OPPTS 830.6315. The study is considered reliable and suitable for use for this endpoint.

Both source and target substances are tertiary-alkyl polysulfide UVCBs and contain multiple constituents with different sulfur contents and degrees of branching in the alkyl chain. The main difference between the two substances is the chain length of the alkyl chain; the target substance is C8 – 10 branched, C9 rich, whereas the source substance is C11 – 13 branched, C12 rich. Both substances have branched alkyl chains, therefore there are numerous potential constituents present in each substance. Read across between these substances is considered to be appropriate for environmental endpoints based on structural similarity; although there will be some differences in physico-chemical properties, and therefore fate in the environment due to the different chain lengths, these differences are likely to be predictable. Both substances contain branched alkyl chains, therefore the degree of branching is not considered to have an impact on the read across approach