Sodium , 99.7% , 7440-23-5
Synonym(s):
Sodium
CAS NO.：7440-23-5
Empirical Formula: Na
Molecular Weight: 22.99
MDL number: MFCD00085307
EINECS: 231-132-9
PRODUCT Properties
| Melting point: | 97.8 °C (lit.) |
| Boiling point: | 883 °C (lit.) |
| Density | 1.04 g/mL at 20 °C |
| vapor pressure | 1 mm Hg ( 440 °C) |
| Flash point: | 128 °F |
| storage temp. | water-free area |
| solubility | H2O: soluble |
| form | pieces (large) |
| Specific Gravity | 0.97 |
| color | White to off-white |
| Resistivity | 4.69 μΩ-cm, 20°C |
| Water Solubility | REACTS |
| Sensitive | Air & Moisture Sensitive |
| Merck | 14,8570 |
| Exposure limits | ACGIH: TWA 2 ppm; STEL 4 ppm OSHA: TWA 2 ppm(5 mg/m3) NIOSH: IDLH 25 ppm; TWA 2 ppm(5 mg/m3); STEL 4 ppm(10 mg/m3) |
| Stability: | Reacts violently with water, liberating and possibly igniting hydrogen. Flammable solid. Incompatible with water, strong oxidizing agents. Do not store near oxidants. Store under oil, or dry inert gas. Air sensitive. |
| InChIKey | MPMYQQHEHYDOCL-UHFFFAOYSA-N |
| CAS DataBase Reference | 7440-23-5(CAS DataBase Reference) |
| NIST Chemistry Reference | Sodium(7440-23-5) |
| EPA Substance Registry System | Sodium (7440-23-5) |
Description and Uses
In its ionic form, sodium is one of the most important biological
nutrients and is found nearly everywhere on Earth.
Although it was isolated as a free metal in 1807 by Sir
Humphry Davy and makes up 2.83% of Earth’s lithosphere, it
is not found in its metallic form in nature. Pure sodium is
extremely reactive, particularly with water to form explosive
hydrogen gas and lye (NaOH); it can also react with water
vapor in air or biological tissues.
Mined and refined salts from terrestrial and aquatic sources
contain sodium in the form of sodium chloride, sodium
iodide, and other compounds. Natron, a naturally occurring
mixture of sodium compounds, has been used since the time of
the ancient Egyptians, and sodium compounds are essential to
numerous industries, including those involving glass, paper,
and soap production. Since it does not occur in its metallic
form in nature, pure sodium metal must be produced industrially,
which is accomplished via electrolysis of molten sodium
chloride.
Sodium is used in the manufacture ofmany highly reactive sodium compounds andtetraethyllead, as a reducing agent in organicsynthesis, and as a catalyst in the productionof synthetic rubber. It is also used in makingsodium lamp and photovoltaic cells.
Safety
| Symbol(GHS) |      GHS02,GHS05,GHS07,GHS08,GHS09 |
| Signal word | Danger |
| Hazard statements | H260-H304-H314-H336-H411 |
| Precautionary statements | P231+P232-P280-P301+P330+P331-P303+P361+P353-P304+P340+P310-P305+P351+P338 |
| Hazard Codes | C,F,T |
| Risk Statements | 34-14/15-45-65 |
| Safety Statements | 26-8-6A-45-43D-43-36/37/39-22-7/8-62-5 |
| RIDADR | UN 3264 8/PG 3 |
| WGK Germany | 1 |
| RTECS | VY0686000 |
| Autoignition Temperature | >115 °C in air |
| TSCA | Yes |
| HS Code | 2805 11 00 |
| HazardClass | 4.3 |
| PackingGroup | I |
| Hazardous Substances Data | 7440-23-5(Hazardous Substances Data) |
