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Nitric acid Structure

Nitric acid

Chemical Properties

Melting point -42 °C
Boiling point 120.5 °C(lit.)
Density  1.41 g/mL at 20 °C
vapor density  1 (vs air)
vapor pressure  8 mm Hg ( 20 °C)
Flash point 120.5°C
storage temp.  Store at +2°C to +25°C.
solubility  Miscible with water.
pka -1.3(at 25℃)
form  Liquid, Double Sub-Boiling Quartz Distillation
color  colorless to deep yellow
Specific Gravity d 20/4 1.4826
Odor Suffocating fumes detectable at <5.0 ppm
PH Range 1
PH 3.01(1 mM solution);2.04(10 mM solution);1.08(100 mM solution);
Water Solubility  >100 g/100 mL (20 ºC)
Sensitive  Hygroscopic
Merck  14,6577
Exposure limits TLV-TWA 2 ppm (5 mg/m3) (ACGIH, MSHA, OSHA, and NIOSH); STEL 4 ppm (~10 mg/m3) (ACGIH).
Dielectric constant 55.0(14℃)
LogP -0.773 (est)
CAS DataBase Reference 7697-37-2(CAS DataBase Reference)
NIST Chemistry Reference Nitric acid(7697-37-2)
EPA Substance Registry System Nitric acid (7697-37-2)

Safety Information

Hazard Codes  C,O,Xi,T+
Risk Statements  8-35-34-20-41-37/38-36/38-26/27
Safety Statements  23-26-36-45-36/37/39-39-60-28
RIDADR  UN 3264 8/PG 3
WGK Germany  1
RTECS  QU5900000
HS Code  2808 00 00
HazardClass  8
PackingGroup  II
Hazardous Substances Data 7697-37-2(Hazardous Substances Data)
Toxicity LC50 inhal (rat)
2500 ppm (1 h)
2 ppm (5 mg/m3)
2 ppm (5.2 mg/m3)
4 ppm (10 mg/m3)
IDLA 25 ppm


Usage And Synthesis

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