Registration Dossier
Registration Dossier
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EC number: 270-732-5 | CAS number: 68477-42-9 A complex combination of hydrocarbons obtained from extractive distillation of saturated and unsaturated aliphatic hydrocarbons usually ranging in carbon numbers from C3 through C5, predominantly C4. It consists of saturated and unsaturated hydrocarbons having carbon numbers predominantly in the range of C3 through C5, predominantly butenes and isobutylene.
Melting point / freezing point
Administrative data
Link to relevant study record(s)
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%).
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