Formic acid contains 53 g L â1 hydrogen at room temperature and atmospheric pressure. By weight, pure formic acid stores 4.3 wt% hydrogen. Pure formic acid is a liquid with a flash point 69 Â°C (cf. gasoline â40 Â°C, ethanol 13 Â°C). 85% formic acid is not flammable.
Tombstone is located in Cochise County of southeast Arizona, 70 miles southeast of Tucson, 20 miles east of the San Pedro River and 15 miles southwest of the Dragoon Mountains.
Location /Description / History. Ajo â pronounced Ah-ho â is located in western Pima County in the western part of Arizona. It is south of Interstate 8 and just off State Highway 85. It is approximately 110 miles from Phoenix and 131 miles from Tucson. It is a gateway into Mexico and to the Organ Pipe Cactus National Monument.