Basic information Safety Related Supplier
Selenious acid Structure

Selenious acid

Chemical Properties

Melting point 70 °C (dec.) (lit.)
Boiling point 684.9 °C(lit.)
Density  3.004 g/mL at 25 °C (lit.)
vapor pressure  2.7hPa at 15℃
Flash point 690°C
storage temp.  Store at RT.
solubility  H2O: soluble
form  powder
pka 2.46(at 25℃)
color  White to almost white or light pink
Specific Gravity 3.004
PH 3.15(1 mM solution);2.47(10 mM solution);1.9(100 mM solution)
Water Solubility  167 g/100 mL (20 ºC)
Sensitive  Hygroscopic
Merck  14,8430
Exposure limits ACGIH: TWA 0.2 mg/m3
NIOSH: IDLH 1 mg/m3; TWA 0.2 mg/m3
Stability Stable.
CAS DataBase Reference 7783-00-8(CAS DataBase Reference)
EPA Substance Registry System Selenious acid (H2SeO3) (7783-00-8)

Safety Information

Hazard Codes  T,N,Xi
Risk Statements  36/38-50/53-33-23/25-52/53
Safety Statements  61-60-45-28A-20/21-26-28
RIDADR  UN 3440 6.1/PG 3
WGK Germany  3
RTECS  VS7700000
3
TSCA  Yes
HazardClass  8
PackingGroup  III
HS Code  28111980
Hazardous Substances Data 7783-00-8(Hazardous Substances Data)

MSDS

Usage And Synthesis

Preparation Products And Raw materials