Paraffin with a melting-point of 50° C. or upwards does well.
The precipitate is in the form of rosettes or needles; melting-point 137°.
The hydrochloride is soluble in alcohol and in water, melting-point about 205°.
Such a curve is called the curve of fusion, or the melting-point curve.
The melting-point of pure chloral hydrate is 57, the boiling-point 96-98 C.