The Ferrous iodide, with the CAS registry number 7783-86-0, is also known as Iron(II) iodide. It belongs to the product category of Inorganics. Its EINECS number is 232-031-2. This chemical's molecular formula is FeI₂ and molecular weight is 309.65. What's more, its IUPAC name is iron(2+) diiodide. It is hygroscopic. It should be sealed and stored in a cool and dry place with the protective gas. 

Preparation: this chemical can be prepared by thick iron powder, excessive iodine in a porcelain jar.

Fe + I₂→ FeI₂

When you are using this chemical, please be cautious about it as the following:
It is harmful by inhalation, in contact with skin and if swallowed. It is irritating to eyes, respiratory system and skin. It must be avoided exposure - obtain special instructions before use. It may cause harm to the unborn child, so you should not breathe dust. In case of contact with eyes, you should rinse immediately with plenty of water and seek medical advice. When using it, you need wear suitable protective clothing, gloves and eye/face protection. In case of accident or if you feel unwell, you should seek medical advice immediately (show the label where possible).

You can still convert the following datas into molecular structure:
(1)Canonical SMILES: [Fe+2].[I-].[I-]
(2)InChI: InChI=1S/Fe.2HI/h;2*1H/q+2;;/p-2
(3)InChIKey: BQZGVMWPHXIKEQ-UHFFFAOYSA-L