If you rinsed your hands well after exposure, the whitening and numbness should pass after a couple hours.

Source:

http://www.cdc.gov/niosh/docs/81-123/pdfs/0335.pdf&ved=0CBoQFjAAahUKEwiIuPCO4qfIAhUBKogKHRNKDcQ&usg=AFQjCNECTLNzu2_EfSZmjBFHlvLv4RRujQ&sig2=N-G-8xrEi6CCMGuyOJCzmg