CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Litharge appears as odorless gray or yellow green or red-brown solid. Sinks in water. (USCG, 1999) |
|---|---|
| Color/Form | Exists in 2 forms: red to reddish-yellow, tetragonal crystals at ordinary temperature; yellow, orthorhombic crystals, stable above 489 °C |
| Boiling Point | 1472 °C |
| Melting Point | 887 °C |
| Solubility | In water: 0.0504 g/L at 25 °C (alpha form); 0.1065 g/L at 25 °C (beta form) |
| Density | 9.5 at 68 °F (USCG, 1999) - Denser than water; will sink |
| Vapor Pressure | 1 Pa at 724 °C; 10 Pa at 816 °C; 100 Pa at 928 °C; 1kPa at 1065 °C; 10 kPa at 1241 °C; 100 kPa at 1471 °C |
| Stability/Shelf Life | Stable under recommended storage conditions. |
| Decomposition | When heated to decomposition it emits toxic fumes of /lead/. |
| pH | Strong base |
| Other Experimental Properties | Commercial grades are yellow to reddish, depending on treatment and purity |
| Chemical Classes | Metals -> Lead Compounds, Inorganic |
SAFETY INFORMATION
| Signal word | Danger |
|---|---|
| Pictogram(s) |
 Exclamation Mark Irritant GHS07  Health Hazard GHS08  Environment GHS09 |
| GHS Hazard Statements |
H351:Carcinogenicity H362:Reproductive toxicity, effects on or via lactation H372:Specific target organ toxicity, repeated exposure H410:Hazardous to the aquatic environment, long-term hazard |
| Precautionary Statement Codes |
P260:Do not breathe dust/fume/gas/mist/vapours/spray. P263:Avoid contact during pregnancy/while nursing. P273:Avoid release to the environment. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P308+P313:IF exposed or concerned: Get medical advice/attention. |
COMPUTED DESCRIPTORS
| Molecular Weight | 223 g/mol |
|---|---|
| Hydrogen Bond Donor Count | 0 |
| Hydrogen Bond Acceptor Count | 1 |
| Rotatable Bond Count | 0 |
| Exact Mass | 223.97157 g/mol |
| Monoisotopic Mass | 223.97157 g/mol |
| Topological Polar Surface Area | 17.1 Ų |
| Heavy Atom Count | 2 |
| Formal Charge | 0 |
| Complexity | 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 | 1 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
Litharge appears as odorless gray or yellow green or red-brown solid. Sinks in water. (USCG, 1999)