Fookin ell you are a numpty.
http://msdssearch.dow.com/PublishedLiteratureDOWCOM/dh_0538/0901b80380538c21.pdf?filepath=productsafety/pdfs/noreg/233-00310.pdf&fromPage=GetDoc
Use sand, scrape it up and put it back in the tin.
Get some gloves, wear eye protection cover your skin and try not to breath too much of it in, our lab procedures involve ventilators for small spills or air supplied hoods for larger ones.
If you’ve been handling it and have it on you then have a shower.
Once you’ve got most of it up white spirits on a rag should help shift the last bit.
There will be a number on the tin to phone if you have any concerns, they might be able to help you dispose of it or provide you with information on what to do with it but that might cost £££.
You might be able to mix up and pot off any unwanted material but I can’t remember how exothermic that one is.