It is understandable and natural that you thought to induce vomiting
but it is not recommended because the kerosine can then enter the respiratory tract
and result in breathing problems.
Though ingestion can result in no complications in some children, it would be best to take him to be assessed as soon as possible.
Ingestion of even 1 ml can potentially cause problems. He should have a chest x ray
, if this is normal and he has no symptoms then he will be allowed home.
If the xray is normal he would be observed for a few hours, even if there are no symptoms.
If he is symptomatic , then he may need admission for a short time for treatment which would mainly involve making sure he has no difficulty breathing
(giving him oxygen
for a short time).
He should be perfectly fine but you need to take him to see someone
hope this helps