**BUY NOW** | PORTACAL® Nitrogen Dioxide calibration gas, by Gasco. Nitrogen Dioxide is a reddish-brown, highly poisonous gas. NO2 is used as an intermediate in the manufacture of nitric and sulfuric acids, and as a nitrating and oxidizing agent. Nitrogen Dioxide is a major air pollutant from the exhaust of internal combustion engines that are not fitted with pollution control devices.
Use PORTACAL® NO2 calibration gas to be sure your gas detection instrumentation is functioning properly.