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EC number: 807-130-4
CAS number: 53716-82-8
(Cyrene™) is a liquid at ambient temperature and pressure, with a
measured freezing point of <-20°C and a measured boiling point of 227°C
at 100.7 kPa. It has a measured relative density of 1.25 at 20°C and
measured vapour pressure value of 28 Pa at 25°C. Cyrene™ has a measured
surface tension value of 72.5 mN/m at 22°C for a nominal concentration
of 1 g/L and viscosity values of 13.81 mPa.s at 20°C and 6.95 mPa.s at
In the presence of water, Cyrene™
forms a reversible dynamic equilibrium with the geminal diol or Gem Diol
[C(OH)2]. This is discussed further in the attached document in Section
13. At concentrations relevant for studies of aqueous physicochemical
properties, the Gem Diol form predominates. Therefore, the measured
water-based values are considered relevant for both form.
Cyrene™/Gem Diol has a water
solubility of 52.6 to 90 w/w% at 20°C and pH 3.09 to 3.15 (determined by
visual inspection), and a measured log Kow value of -1.52 at
22°C and pH 5.18 to 5.24.
Cyrene™ is not classified for
flammability in accordance with Regulation (EC) No. 1272/2008 on the
basis of a measured flash point of 108°C at 101.9 kPa and measured
boiling point of 227°C at 100.7 kPa. It has a measured auto-ignition
temperature of 296°C at 100.3 to 101.3 kPa and is not explosive and not
oxidising on the basis of structural examination. Cyrene™ is determined to
be non-hazardous as no gases were evolved in any of the four steps under
the conditions of an EU Test Method A.12.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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