Apologies, but there seems to be a misunderstanding. The chemical compound As2H4S8 does not exist or is not recognized in chemistry. Please check your chemical dictionary or your source of information again.
This could be due to a mistake in writing the chemical formula or a confusion with another substance. The correct chemical formula would include the chemical elements with indices representing the number of atoms of each element in a molecule.
In this case, As2H4S8 appears to be trying to represent a compound containing the atoms As (Arsenic), H (Hydrogen) and S (Sulfur) but this ratio is imbalanced and does not form a recognized chemical compound.
Ensure that you have written the chemical formula accurately and check your chemical dictionary again.