Registration Dossier

Physical & Chemical properties

Melting point / freezing point

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Description of key information

Melting point data was read across from the butene substances (2-methylpropene, but-1-ene and 2-butene) to members of the C4, high 1,3 -butadiene (>0.1%) category. The melting points ranged from -185°C to -105.5°C

Key value for chemical safety assessment

Additional information

Melting point data was read across from the butene substances (2-methylpropene, but-1-ene and 2-butene) for members of the category.This data was taken from the CRC handbook (CRC 2008), which is peer reviewed and considered a reliable source. The substances are C4 hydorcarbons, and have a similar structure to the members of the category C4, high 1,3 -butadiene (>0.1%). Due to their similar structures, they can be predicted to have similar phys-chem properties and so read across from the butene substances is considered acceptable. The melting points ranged from -185°C to -105.5°C, and this range is considered to be representative of category C4, high 1,3 -butadiene (>0.1%).