Formic acid is a low flammable, biodegradable, and stable liquid under ambient conditions, with a boiling point of 101°C and a freezing point of 8.3°C. It is a colorless, clear, and corrosive liquid with a pungent odor. it is an efficient organic acid that is environmentally friendly and used in many different applications.
1- it is an organic acid used in oil- and gas-well stimulation treatments.
2- it has an advantage over HCl in that formic acid is easier to inhibit against pipe corrosion at temperatures as high as 400°F .
3- it is intermediate in strength between hydrochloric acid and acetic acid.
4- It corrodes steel more uniformly than does HCl and causes less pitting.