Melting point :−138 °C(lit.)
Boiling point :−50 °C(lit.)
Density :1.274; 2.4849
vapor density :2.1 (20 °C, vs air)
vapor pressure :9034 mm Hg ( 21 °C)
refractive index :n 1.3785
solubility :soluble in H2O, ethanol
form :gas
color :colorless
Odor Threshold :0.055ppm
explosive limit :11.9-29%
Water Solubility :mL/100mL H2O: 133.3 (0°C), 56.1 (20°C), 40.3 (30°C) [LAN05]; slowly decomposes in H2O [COT88]; soluble alcohol [HAW93]
Henry's Law Constant :2.0×10^-4 mol/(m³Pa) at 25℃, Burkholder et al. (2019)
Stability :Stable. Corrosive to common metals when moisture is present. Reacts vigorously with oxidants. Flammable. Suck-back into cylinder may cause rupture.
InChI :1S/COS/c2-1-3
InChIKey :JJWKPURADFRFRB-UHFFFAOYSA-N
SMILES :O=C=S
EPA Substance Registry System :Carbonyl sulfide (463-58-1)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H221 Flammable gas Flammable gases Category 2 Warning P210, P377, P381, P403 H280 Contains gas under pressure; may explode if heated Gases under pressure Compressed gas Liquefied gas Dissolved gas Warning P410+P403 H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H330 Fatal if inhaled Acute toxicity,inhalation Category 1, 2 Danger P260, P271, P284, P304+P340, P310,P320, P403+P233, P405, P501 H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P302+P352 IF ON SKIN: wash with plenty of soap and water. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P410+P403 Protect from sunlight. Store in a well-ventilated place.