The Hill order convention is used. The number assigned to each unique compound by the Chemical Abstracts Service. The Beilstein Registry Number is a unique identifier in the Beilstein Database from the Beilstein Institute, Frankfurt. All references are from the fourth edition of Handbuch der Organische Chemie. No distinction is made as to whether the decomposition occurs before the melting point is reached or whether it occurs during melting.
Many compounds are salts or hydrates and lose an acid or water when heated.
When a superscript is present, it indicates the pressure in mmHg to which the boiling point refers. Note that the property search mode operates only on the normal boiling points. The temperature in oC at which the density value applies is given as a superscript. The number of decimal places given provides a rough estimate of the accuracy of the value. Refractive Index Refractive index is the ratio of the speed of electromagnetic radiation in free space to the speed of the radiation in another medium.