CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Methanearsonic acid, [sodium salt] appears as odorless colorless solid. Solution may be red or green. Solid may float or sink in water; solid and solution mix with water. (USCG, 1999) |
|---|---|
| Color/Form | White solid |
| Odor | None |
| Boiling Point | Decomposes (NTP, 1992) |
| Melting Point | 235 to 241 °F (NTP, 1992) |
| Solubility | greater than or equal to 100 mg/mL at 72 °F (NTP, 1992) |
| Density | (DSMA) 1.0 at 68.0 °F (MSMA solutions) 1.4-1.6 at 20 °C (liquid) (USCG, 1999) |
| Vapor Pressure | 0.00000008 [mmHg] |
| LogP | log Kow= -3.10 |
| Stability/Shelf Life | STABLE TO HYDROLYSIS |
| Autoignition Temperature | Not flammable (USCG, 1999) |
| Decomposition | When heated to decomposition it emits toxic fumes of /arsenic and sodium oxide/. |
| Corrosivity | NON-CORROSIVE TO IRON, RUBBER, & MOST PLASTICS |
| Dissociation Constants | pKa1= 4.1; pKa2 = 9.02 |
| Other Experimental Properties | Soln may contain red or green dyes. /Methanearsonic acid, sodium salts/ |
| Chemical Classes | Metals -> Arsenic Compounds, Organic |
SAFETY INFORMATION
| Signal word | Danger |
|---|---|
| Pictogram(s) |
 Skull and Crossbones Acute Toxicity GHS06  Environment GHS09 |
| GHS Hazard Statements |
H410:Hazardous to the aquatic environment, long-term hazard |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P403+P233:Store in a well-ventilated place. Keep container tightly closed. |
COMPUTED DESCRIPTORS
| Molecular Weight | 161.952 g/mol |
|---|---|
| Hydrogen Bond Donor Count | 1 |
| Hydrogen Bond Acceptor Count | 3 |
| Rotatable Bond Count | 0 |
| Exact Mass | 161.927408 g/mol |
| Monoisotopic Mass | 161.927408 g/mol |
| Topological Polar Surface Area | 60.4 Ų |
| Heavy Atom Count | 6 |
| Formal Charge | 0 |
| Complexity | 71.2 |
| 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 | 2 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
Methanearsonic acid, [sodium salt] appears as odorless colorless solid. Solution may be red or green. Solid may float or sink in water; solid and solution mix with water. (USCG, 1999)