This is Halal Index. Like the Merck Index, it has an entry for each food item/ingredient with details for components. I have not seen an entry page so I can't write more. But if you have seen the Merck Index, then I think you know the concept.
This is the Halal Portal, the official Halal portal for Malaysia.
This link is from Islamic Voice and gives more details of food ingredients and what to look for.