Fuming sulfuric acid

Melting point :2 °C
Boiling point :~290 °C(lit.)
Density :1.925 g/mL at 25 °C(lit.)
vapor density :<0.3 (25 °C, vs air)
vapor pressure :1 mm Hg ( 146 °C)
storage temp. :Store below +30°C.
solubility :H₂O: soluble
form :Liquid
pka :1.92(at 25℃)
color :Colorless
Specific Gravity :1.925
PH :<1 (100g/l, H2O, 20℃)
Water Solubility :Miscible with water.
Sensitive :Hygroscopic
Merck :14,8974
BRN :2037554
Exposure limits :ACGIH: TWA 0.2 mg/m3
OSHA: TWA 1 mg/m3
NIOSH: IDLH 15 mg/m3; TWA 1 mg/m3 Dielectric constant :84(20.0℃)
Stability :Stable. Incompatible with organic materials, powdered metals, bases, halides. Reacts violently with water. Very hygroscopic.
InChI :1S/H2O4S.O3S/c1-5(2,3)4;1-4(2)3/h(H2,1,2,3,4);
InChIKey :HIFJUMGIHIZEPX-UHFFFAOYSA-N
SMILES :[S](=O)(=O)(O)O.[S](=O)(=O)=O
CAS DataBase Reference :8014-95-7(CAS DataBase Reference)
EPA Substance Registry System :Fuming sulfuric acid (8014-95-7)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes 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 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:	P260 Do not breathe dust/fume/gas/mist/vapours/spray. P271 Use only outdoors or in a well-ventilated area. P280 Wear protective gloves/protective clothing/eye protection/face protection. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.