Potassium nitrate , AR,99.0% , 7757-79-1
Synonym(s):
Potassium nitrate;Sodium nitrate;Nitrate of Potash;Nitric acid potassium salt;Chile salpeter
CAS NO.：7757-79-1
Empirical Formula: KNO3
Molecular Weight: 101.103
MDL number: MFCD00011409
EINECS: 231-818-8
PRODUCT Properties
| Melting point: | 334 °C (lit.) |
| Boiling point: | 100 °C750 mm Hg |
| Density | 1.00 g/mL at 20 °C |
| Flash point: | 400°C |
| storage temp. | Store at RT. |
| solubility | H2O: 1 M at 20 °C, clear, colorless |
| form | Solid |
| Specific Gravity | 2.109 |
| color | white |
| PH | 5.0-7.5 (50g/l, H2O, 20℃) |
| Odor | odorless, cooling pungent salty taste |
| Water Solubility | 320 g/L (20 ºC) |
| Sensitive | Hygroscopic |
| Merck | 14,7648 |
| Dielectric constant | 5（0.0℃） |
| Stability: | Stable. Strong oxidizer - contact with combustible material may cause fire. Incompatible with combustible materials, strong reducing agents. |
| LogP | -0.129 (est) |
Description and Uses
Potassium nitrate is a solid, colorless, crystalline ionic compound that exists as the mineral niter.Potassium nitrate is also known as saltpeter. The name saltpeter comes from the Latin sal petrae, meaning salt of stone or salt of Petra. he term saltpeter or Chilean saltpeter is also used for sodium nitrate, NaNO3.
Although the most prominent use of saltpeter is for the production of black powder,potassium nitrate is also used as fertilizer. In the first half of the 17th century, JohannRudolf Glauber (1604–1668) obtained saltpeter from animal pens and discovered its useto promote plant growth. Glauber included saltpeter with other nutrients in fertilizer mixtures. Glauber’s work was one of the first to indicate the importance of nutrient cyclingin plant nutrition.
Safety
| Symbol(GHS) |  GHS03 |
| Signal word | Warning |
| Hazard statements | H272 |
| Precautionary statements | P210-P220-P280-P370+P378-P501 |
| Hazard Codes | O,Xi,Xn |
| Risk Statements | 8-36/38-36/37/38-22 |
| Safety Statements | 26-17-36-7-24/25 |
| RIDADR | UN 3264 8/PG 3 |
| WGK Germany | 1 |
| RTECS | TT3700000 |
| TSCA | Yes |
| HS Code | 2834 21 00 |
| HazardClass | 5.1 |
| PackingGroup | III |
| Toxicity | LD50 orally in rabbits: 1.166 g anion/kg, Dollahite, Rowe, Southwest. Vet. 27, 246 (1974) |
