potassium nitrate

– product identification
cas no. : 7757-79-1
einecs no. : 231-818-8
formula : kno3
molecular weight : 101.1
h.s. code : 2834.2190
toxicity : oral rat ld50: 3750 mg/kg
synonyms : nitre; nitric acid potassium salt; saltpeter; vicknite; kalii nitras; kaliumnitrat (german); nitrate of potash; kaliumnitrat (dutch); nitrato de potasio (spanish); nitrate de potassium (french)

– physical and chemical properties
physical state : colorless and transparent rhombic crystals or white powder
melting point : 334oc
boiling point : (decomposes at 400 oc)
specific gravity : 2.11
solubility in water : soluble
vapor density : 3.0
nfpa rating : health: 2; flammability: 0; reactivity: 0 special hazard: ox
flash point : not combustible, but substance is a strong oxidizer
stability : stable under ordinary conditions

– applications
 industrial grade
– used as the raw material of fireworks to produce purple flame, black powder in mining,
fuse (ignition wire) and firecracker.
– used for heat transfer salts, heat treatment salt bath, production of cigarette paper.
– used as catalyst and mineral processing agent, ceramic glaze and enamel.
– used as color fixative and preservative.
 optical glass grade
– used as glass refining agent and for the production of auto lamp glass, optical glass,
cell phone and computer touch screen, clock glass, tv kinescope glass.
 agriculture grade
– increase yield, improve quality, accelerate the ripening, enhance disease resistance,
prolong the shelf life.
– widely used in various grain crop, economic crop, as base fertilizer or additional fertilizer,
foliar fertilizer, cultivation without soil, especially suitable for tobacco, fruit crops.

– specification (industrial grade)
testing items/ quality standard (first class) gb/t 1918-2011 / quality standard
appearance : white powder / white powder
purity : 99.4% min / 99.7% min
moisture : 0.10% max / 0.10% max
chloride (as cl) : 0.02% max / 0.01% max
water insoluble : 0.02% max / ——–
sulphate (as so4) : 0.01% max / 0.005% max
hygroscopicity : 0.30% max / ——–
k2co3 : ——– / 0.01% max
ph : 6 / 6.5-8
particle size : 80 -100mesh / 30-80mesh (200-500um)

– specification (optical glass grade)
testing items / quality standard / reference testing results
appearance : white crystal / white crystal
purity : 99.80% min / 99.92%
moisture : 0.06% max / 0.028%
k2co3 : 0.01% max / 0.005%
sulphate (as so42-) : 0.005% max / 0.005%
chloride (as cl) : 0.005% max / 0.0035%
water insoluble : 0.01% max / 0.003%
fe : 0.002% max / 0.002%
natrium (na) : 0.01% max / 0.008%
particle size : 30-80mesh (200-500um) / conforms

– transportation
storage : stored in cool, ventilated and dry warehouse.
packing : in 25kgs net pp woven bags or 1200kgs jumbo bags.
hazard class : 5.1 (packing group: iii)
un no. : 1486