The following highways are numbered 25C:
New Hampshire Route 10 is a 122.25-mile-long (196.74 km) north–south state highway in western New Hampshire, United States. Its southern terminus is in Winchester at the Massachusetts state line, where it continues south as Massachusetts Route 10. Administratively, the northern terminus is at a junction with U.S. Route 302 in Haverhill.
New Hampshire Route 25 is a 96.62-mile (155.49 km) long east–west state highway in New Hampshire. It runs completely across the state from Vermont to Maine.
State Route 25 (SR 25) is part of the system of numbered highways in Maine. It runs for 42.4 miles (68.2 km) across the south central part of the state. SR 25 begins at the New Hampshire border near Porter, where it continues west as New Hampshire Route 25 (NH 25). Its eastern terminus is in downtown Portland at the intersection of Park Avenue and State Street. Administratively, it shares a terminus with SR 22 and SR 77.
New York State Route 25C (NY 25C) was an east–west state highway on Long Island in New York in the United States. The route began in Queens at an intersection with NY 25 and paralleled NY 25B for just over 4 miles (6 km) before ending at a junction with NY 25B in western Nassau County. NY 25C was assigned in the 1930s and removed in 1970. Part of the route's former routing is still state-maintained as New York State Route 900F, an unsigned reference route.
Union Turnpike is a thoroughfare stretching across part of Long Island in southern New York state, mostly within central and eastern Queens in New York City. It runs from Myrtle Avenue in Glendale, Queens, to Marcus Avenue in North New Hyde Park, Nassau County, about 1 mile (1.6 km) outside the New York City border.
Interstate business routes are roads connecting a central or commercial district of a city or town with an Interstate bypass. These roads typically follow along local streets often along a former US or state highway that had been replaced by an Interstate. Interstate business route reassurance markers are signed as either loops or spurs using a green shield shaped sign and numbered like the shield of the parent Interstate Highway.
25C-NBOMe is a psychedelic drug and derivative of the psychedelic phenethylamine 2C-C. 25C-NBOMe appeared on online vendor sites in 2010 but was not reported in the literature until 2011. It acts as a potent agonist of the 5-HT2A receptor, and has been studied in its 11C radiolabelled form as a potential ligand for mapping the distribution of 5-HT2A receptors in the brain, using positron emission tomography (PET). Multiple deaths have occurred from usage of 25C-NBOMe due to the ease of accidental overdose. The long-term toxic effects of the drug have not been researched.