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EC number: 200-879-2
CAS number: 75-56-9
The vapour pressure of
propylene oxide is 74 kPa at 25 °C (Harlan Laboratories Ltd., 2010b).
Water solubility of propylene oxide lies in a range of 42.5 -45.0% w/w
(ca. 425-450 g/L) at 20°C (Harlan Laboratories Ltd., 2010a). The
octanol/water partition coefficient (log Pow) was determined by
reverse-phase HPLC (Shell Research Limited, 1986) and calculated using
the method of Hansch and Leo (1979) and is < 1. Propylene oxide has a
static viscosity of 0.374 mm2/s at 20 °C and of 0.447 mm2/s
Ltd., 2010a). The substance is not surface active (surface activity of
1.06 g/L solution at 21 °
C is 71.5 mN/m) (Harlan Laboratories, 2010a).
The substance has a
flash point of -38 °C (Harlan Laboratories Ltd., 2010b). Based on this
value and a boiling point of 35 ºC, propylene oxide is classified as
Cat. 1, H224 in
EU Classification, Labeling and Packaging of Substances and Mixtures
(CLP) Regulation (EC) No. 1272/2008.
Although the presence
of 1,2 -epoxide in the structure of propylene oxide indicates potential
explosive properties, the oxygen balance is -220, suggesting that the
substance is non-explosive. Respectively, the testing is not warranted
in accordance with Column 2 of REACH Annex XI and Chapter R.126.96.36.199 of
REACH Guidance on information requirements and chemical safety
assessment. Consequently, propylene oxide does not need to be classified
as explosive in accordance with and EU Classification, Labelling and
Packaging of Substances and Mixtures (CLP) Regulation (EC) No. 1272/2008.
temperature of propylene oxide is > 400°C (Harlan Laboratories Ltd.,
The conductance of the
study on oxidizing properties is not warranted in accordance with Column
2 of REACH Annex VII, based on the substance extreme flammability and
its structure. Accordingly, the classification in accordance with EU
Classification, Labelling and Packaging of Substances and Mixtures (CLP)
Regulation (EC) No. 1272/2008 is not warranted.
The substance remains
undissociated in water, as it does not contain chemical groups which can
In accordance with
column 1 or 2 of REACH Annex VII/IX and/or with section 1 of REACH Annex
XI and/or the REACH guidance on information requirements and chemical
safety assessment (chapter R7.A), data on the particle size
distribution, pyrophoricity, water reactivity and stability in organic
solvents and identity of relevant degradation products do not need to be
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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