A positive correlation has been observed between acid attacks and ease of acid purchase. Sulfuric, nitric, and hydrochloric acid are most commonly used and are all cheap and readily available in many instances. For example, often acid throwers can purchase a liter of concentrated sulfuric acid at motorbike mechanic shops for about 40 U.S. cents. Nitric acid costs around $1.50 per liter and is available for purchase at gold or jewelry shops, as polishers generally use it to purify gold and metals. Hydrochloric acid is also used for polishing jewelry, as well as for making soy sauce, cosmetics, and traditional medicine/amphetamine drugs.
Due to such ease of access, many organizations call for a stricter regulation on the acid economy. Specific actions include required licenses for all acid traders, a ban on concentrated acid in certain areas, and an enhanced system of monitoring for acid sales, such as the need to document all transactions involving acid. However, some scholars have warned that such stringent regulation may result in black market trading of acid, which law enforcements must keep in mind.