Sheikh Muhammad Al-Mukhtar Ash-Shinqiti, Director of the Islamic Center of South Plains,Lubbock, Texas, states: “The juristic rule of istihlak states that any substance that is so INSIGNIFICANT because of its quantity as mixed with an overriding halal substance(s), then it is forgiven. If we apply this rule to your question, we would say what experts have concluded in this regard, that any quantity of alcohol that does not exceed the amount of 0.5% is not intoxicating, and therefore it would not render juice or bread haram when mixed with them. The same applies to ketchup, mustard, etc.
People who misunderstand this rule are often confused with the interpretation of the hadith “whatever intoxicates in big quantity, a small amount of it is haram.” However, the hadith is only talking about the “intoxicating substance” that is not mixed with others. For example, a Muslim is not allowed to take little drops of wine and drinks them under the pretext that he won’t get drunk. But when the alcohol is mixed with other substance to the effect that it has become irrelevant (up to 0.5%) then it has become another substance that falls under the rules of either istihlak or istihalah (transformation).”