Product Description At standard temperature and pressure, carbon monoxide gas is a  colourless, odourless, without excitant gas.It's purity cover a range of 99.9%~99.99%. Carbon monoxide (CO) is a colorless, odorless, and tasteless gas that is slightly less dense than air. It is toxic to hemoglobic animals (both invertebrate and vertebrate, including humans) when encountered in concentrations above about 35 ppm, although it is also produced in normal animal metabolism in low quantities, and is thought to have some normal biological functions. Carbon Monoxide CO CAS No.: 630-08-0 EINECS No.: 211-128-3 UN No.: UN1016 Purity: 99.9%-99.99% Dot Class: 2.1 & 2.3 Appearance: Colorless Grade Standard: Food Grade, Industrial Grade, Medical Grade Specification 99.5% 99.9% 99.95% 99.99%
