Potassium Nitrate

CAS RN:7757-79-1

Reactivities / Incompatibilities

A micro Parr calorimeter exploded when the wrong proportions of these ingredients were used. The intended mixture was 4.0 g sodium peroxide, 0.2 g dextrose, and 0.2 g potassium nitrate; actual proportions were 0.35 g, 2.59 g, and 0.2 g respectively. There was insufficient sodium peroxide to dissolve decomposition gases, hence a rapid temp and pressure build-up caused the Parr bomv to burst.
... A mixture of potassium nitrate and sodium hypophosphite constitutes a powerful explosive.
A mixture of arsenic and potassium nitrate explodes when ignited.
A batch of 3,257 g of boron, 9362 g of potassium nitrate, 989 g of laminac, and 500 g of trichloroethylene had been mixing for 5 min, when an explosion occurred.
Powdered zinc and potassium nitrate explode if heated.
A mixture of potassium nitrate ... and calcium silicide (60:40) is a readily ignited primer which burns at a very high temp. It is capable of initiating many high-temp reactions ...
When chlorinated phenols are heated for analytical purposes with calcium hydroxide-potassium nitrate mixtures, chlorinated benzodioxins analogous to the extremely toxic tetrachlorodibenzodioxin may be formed.
The /chromium/ nitride deflagrates with the molten /potassium/ nitrate.
... Mixtures of white phosphorus and potassium nitrate explode on percussion, and a mixture with red phosphorus reacts vigorously on heating.
Mixtures of potassium nitrate with sodium phosphinate and sodium thiosulfate are explosive, the former being rather powerful.
When organic matter is destroyed for residue analysis by heating with equimolar potassium nitrate-sodium nitrate mixture to 390 deg C, a 20-fold excess of nitrate must be used. If over 10% of organic matter is present, pyrotechnic reaction occur which could be explosive ...
A pyrotechnic mixture of aluminium powder with potassium perchlorate, barium nitrate, potassium nitrate and water exploded after 24 hr storage under water. Tests revealed the exothermic interaction of finely divided aluminium with nitrate and water to produce ammonia and aluminium hydroxide. Under the conditions prevailing in the stored mixture, the reaction would be expected to accelerate, finally involving the perchlorate as oxidant and causing ignition of the mixture.
Aluminium powder, barium nitrate, potassium nitrate, sulfur and vegetable adhesives, mixed to a paste with water, exploded on 2 occasions. Lab investigation showed initial interaction of water and aluminium to produce hydrogen. It was supposed that nascent hydrogen reduced the nitrates present, increasing the alkalinity and thence the rate of attack on aluminium, the reaction becoming self-accelerating. Cause of ignition was unknown ...
Heating the bis(trichloromethyl)benzene with potassium nitrate ... to effect conversion to the bis(acyl chloride) led to eruptions at higher temp, and was too dangerous to pursue.
Thermal reaction hazards of potassium nitrate-cellulose mixtures were evaluated ... stoichiometric mixture (zero oxygen balance) showed the lowest ignition temp.
Explosion hazards of mixtures of lactose monohydrate with ... potassium nitrate ... are assessed.
Mixtures of potassium nitrate and powdered titanium, antimony or germanium explode on heating, and with zirconium at the fusion temp of the mixture.
Mixtures of potassium nitrate with antimony trisulfide, barium sulfide, calcium sulfide, germanium monosulfide or titanium disulfide all explode on heating. The mixture with arsenic disulfide is detonable, and addition of sulfur gives a pyrotechnic composition. Mixtures with molybdenum disulfide are also detonable. Interaction with sulfides in molten mixtures is violent.
Boron phosphide ignites in molten nitrates; mixtures of the nitrate with copper(II) phosphide explode on heating, and that with copper monophosphide explodes on impact.
A pyrotechnic blend of a finely divided mixture /of potassium nitrate/ with boron ignited and exploded when the aluminium container was dropped; (the aluminium container also may have been involved). Boron is not attacked at below 400 deg C, but is at fusion temp or at lower temp if decomposition products (nitrites) are present. The mixture has also been evaluated as a propellant.
... Contact of powdered carbon with the /potassium/ nitrate at 290 deg C causes vigorous combustion and a mixture explodes on heating. Gunpowder is the oldest known explosive and contains potassium nitrate, charcoal and sulfur, the latter to reduce ignition temp and to increase the speed of combustion ...
Potassium nitrate in cloth sacks stowed next to baled peat moss became involved in a ship fire and caused rapid flame spread and explosions. Heat transfer salt from a new supplier was added to a pilot plant reactor salt bath. Some 12 hr after start of heating to melt the bath contents a muffled explosion occurred, attributed to presence of organic impurities in the new salt.
... Contact of the /thorium/ dicarbide with molten ... potassium nitrate ... causes incandescence.
Fluorine attacks potassium nitrate to give fluorine nitrate.
A mixture of ... /potassium nitrate and sodium acetate/ may cause an explosion.
A mixture of ... /sulfur, potassium nitrate and arsenic trisulfide/ is a known pyrotechnic formulation.
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