Melting point :-50.8°
Boiling point :127 °C(lit.)
Density :1.96 g/mL at 20 °C
vapor pressure :721.8kPa at 20℃
Flash point :126-127°C
storage temp. :2-8°C
solubility :very soluble in H2O; soluble in organic solvents
pka :-10(at 25℃)
form :colorless or yellow gas
color :Colorless to brown
Odor :Pungent odor
PH Range :1
PH :3.01(1 mM solution);2.04(10 mM solution);1.08(100 mM solution)
Water Solubility :soluble
Sensitive :Hygroscopic
Merck :14,4776
Henry's Law Constant :2.5×10^-1 mol/(m³Pa) at 25℃, Ordó? (2012)
Dielectric constant :3.4（-50℃）
Exposure limits :ACGIH: TWA 0.01 ppm
Stability :Stable. Incompatible with bases, amines. Corrodes steel. May discolour on exposure to air and light.
InChI :1S/HI/h1H
InChIKey :XMBWDFGMSWQBCA-UHFFFAOYSA-N
SMILES :I
CAS DataBase Reference :10034-85-2(CAS DataBase Reference)
NIST Chemistry Reference :Hydrogen iodide(10034-85-2)
EPA Substance Registry System :Hydriodic acid (10034-85-2)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H290 May be corrosive to metals Corrosive to Metals Category 1 Warning P234, P390, P404 H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501 H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning H370 Causes damage to organs Specific target organ toxicity, single exposure Category 1 Danger P260, P264, P270, P307+P311, P321,P405, P501 H372 Causes damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 1 Danger P260, P264, P270, P314, P501 H412 Harmful to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 3 P273, P501
Precautionary statements:	P234 Keep only in original container. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P363 Wash contaminated clothing before reuse. P390 Absorb spillage to prevent material damage. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P405 Store locked up. P406 Store in corrosive resistant/… container with a resistant inner liner. P501 Dispose of contents/container to..…