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)