Carbon monoxide Names Preferred IUPAC name Carbon monoxide Other names Carbon monooxide Carbonous oxide Carbon (II) oxide Carbonyl Flue gas Monoxide Identifiers CAS Number 630 - 08 - 0 3D model (JSmol) Interactive image Beilstein Reference 3587264 ChEBI CHEBI: 17245 ChemSpider 275 ECHA InfoCard 100.010. 118 EC Number 211 - 128 - 3 Gmelin Reference 421 KEGG D09706 MeSH Carbon + monoxide PubChem CID 281 RTECS number FG3500000 UNII 7U1EE4V452 UN number 1016 InChI (show) InChI = 1S / CO / c1 - 2 Key: UGFAIRIUMAVXCW - UHFFFAOYSA - N InChI = 1 / CO / c1 - 2 Key: UGFAIRIUMAVXCW - UHFFFAOYAT SMILES (show) (C -) # (O+) Properties Chemical formula CO Molar mass 28.010 g / mol Appearance colorless gas Odor odorless Density 789 kg / m, liquid 1.250 kg / m at 0 ° C, 1 atm 1.145 kg / m at 25 ° C, 1 atm Melting point − 205.02 ° C (− 337.04 ° F; 68.13 K) Boiling point − 191.5 ° C (− 312.7 ° F; 81.6 K) Solubility in water 27.6 mg / L (25 ° C) Solubility soluble in chloroform, acetic acid, ethyl acetate, ethanol, ammonium hydroxide, benzene Henry 's law constant (k) 1.04 atm m / mol Magnetic susceptibility (χ) − 9.8 10 cm / mol Refractive index (n) 1.0003364 Dipole moment 0.122 D Thermochemistry Specific heat capacity (C) 29.1 J / (K mol) Std molar entropy (S) 197.7 J / (mol K) Std enthalpy of formation (Δ H) − 110.5 kJ / mol Std enthalpy of combustion (Δ H) − 283.4 kJ / mol Hazards Safety data sheet See: data page ICSC 0023 EU classification (DSD) (outdated) F T+ R - phrases (outdated) R61 R12 R26 R48 / 23 S - phrases (outdated) S53 S45 NFPA 704 0 Flash point − 191 ° C (− 311.8 ° F; 82.1 K) Autoignition temperature 609 ° C (1,128 ° F; 882 K) Explosive limits 12.5 -- 74.2 % Lethal dose or concentration (LD, LC): LC (median concentration) 8636 ppm (rat, 15 min) 5207 ppm (rat, 30 min) 1784 ppm (rat, 4 h) 2414 ppm (mouse, 4 h) 5647 ppm (guinea pig, 4 h) LC (lowest published) 4000 ppm (human, 30 min) 5000 ppm (human, 5 min) US health exposure limits (NIOSH): PEL (Permissible) TWA 50 ppm (55 mg / m) REL (Recommended) TWA 35 ppm (40 mg / m) C 200 ppm (229 mg / m) IDLH (Immediate danger) 1200 ppm Related compounds Related carbon oxides Carbon dioxide Carbon suboxide Oxocarbons Supplementary data page Structure and properties Refractive index (n), Dielectric constant (ε), etc. Thermodynamic data Phase behaviour solid -- liquid -- gas Spectral data UV, IR, NMR, MS Except where otherwise noted, data are given for materials in their standard state (at 25 ° C (77 ° F), 100 kPa). Y verify (what is?) Infobox references
what is the solubility between carbon monoxide and water
27.6 mg / L (25 ° C)