What is an organic acid?
An organic acid is a type of organic chemical compound with acidic properties. (1)

What is NOT an organic acid?
an inorganic acid

What are types of organic acids? 
carboxylic acids (1)
sulfonic acids (1)
alcohols
lactic acid
acetic acid
formic acid
citric acid (1)
oxalic acid
uric acid
malic acid
tartaric acid (1)

What contains organic acids? 

Resources
1. https://en.wikipedia.org/wiki/Organic_acid

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