Home Categories Inorganic chemistry Potassium nitrate
A6708412

Potassium nitrate , ACS,≥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

Update time: 2022-07-08

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
Odor odorless, cooling pungent salty taste
PH 5.0-7.5 (50g/l, H2O, 20℃)
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)
CAS DataBase Reference 7757-79-1(CAS DataBase Reference)
EPA Substance Registry System Potassium nitrate (7757-79-1)

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
Hazardous Substances Data 7757-79-1(Hazardous Substances Data)
Toxicity LD50 orally in rabbits: 1.166 g anion/kg, Dollahite, Rowe, Southwest. Vet. 27, 246 (1974)

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