This is an emergency. Even if he only got it on his fur, he could still absorb the chemicals.
Call the ASPCA Animal Poison Control Center at (888)(NNN) NNN-NNNN/strong>.
THEN, based on their reccomendations:
Call your veterinarian NOW or take him immediately to a local emergency clinic. DO NOT INDUCE vomiting.
Even small amounts inhaled or aspirated may cause rapid and severe lung damages and other organs can also be damaged rapidly. Emergency medical treatment is likely the only helpful thing that can be done at this time.