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7783-00-8

7783-00-8 structural image
Product Name: Selenious acid
Formula: H2O3Se
Synonyms: Selenious acid
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CHEMICAL AND PHYSICAL PROPERTIES

Physical Description Selenious acid appears as colorless solid, transparent, colorless crystals. Used as a reagent for alkaloids and as an oxidizing agent. Isotope is used in labeling radiopharmaceuticals. (EPA, 1998)
Color/Form White hygroscopic crystals.
Boiling Point 684.9
Melting Point Decomposes at 158 °F (EPA, 1998)
Solubility soluble
Density 3.004 at 59 °F (EPA, 1998) - Denser than water; will sink
Vapor Pressure 2 mmHg at 59 °F (EPA, 1998)
Decomposition When heated to decomp ... emits toxic fumes of /selenium/.
Dissociation Constants 2.46
Other Experimental Properties DELIQUESCENT; GIVES OFF WATER UPON HEATING & SELENIUM OXIDE SUBLIMES; OXIDIZED TO SELENIC ACID BY STRONG OXIDIZING AGENTS ... REDUCED TO SELENIUM BY MOST REDUCING AGENTS ... .
Chemical Classes Other Classes -> Other Inorganic Compounds

SAFETY INFORMATION

Signal word Danger
Pictogram(s)

Skull and Crossbones
Acute Toxicity
GHS06

Health Hazard
GHS08

Environment
GHS09
GHS Hazard Statements H373:Specific target organ toxicity, repeated exposure
H410:Hazardous to the aquatic environment, long-term hazard
Precautionary Statement Codes P273:Avoid release to the environment.
P314:Get medical advice/attention if you feel unwell.

COMPUTED DESCRIPTORS

Molecular Weight 128.99 g/mol
Hydrogen Bond Donor Count 2
Hydrogen Bond Acceptor Count 3
Rotatable Bond Count 0
Exact Mass 129.91692 g/mol
Monoisotopic Mass 129.91692 g/mol
Topological Polar Surface Area 57.5 Ų
Heavy Atom Count 4
Formal Charge 0
Complexity 26.3
Isotope Atom Count 0
Defined Atom Stereocenter Count 0
Undefined Atom Stereocenter Count 0
Defined Bond Stereocenter Count 0
Undefined Bond Stereocenter Count 0
Covalently-Bonded Unit Count 1
Compound Is Canonicalized Yes

PRODUCT INTRODUCTION

description

Selenious acid appears as colorless solid, transparent, colorless crystals. Used as a reagent for alkaloids and as an oxidizing agent. Isotope is used in labeling radiopharmaceuticals. (EPA, 1998)