Potassium Nitrate

Synonyms : Saltpeter



Molecular Formula


Molecular Weight



White Crystals





98.5% MIN

*Also available Pure, Pharma passing, LR, AR and ACS Grade

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Material Safety Data Sheet

Potassium Nitrate


Section 1: Chemical Product and Company Identification


Chemical Name: Potassium Nitrate


CAS#: 7757-79-1

RTECS: TT370000

TSCA: TSCA 8(b) inventory: Potassium nitrate

CI#: Not available.

Synonym: Nitric Acid, potassium salt; saltpeter

Chemical Formula: KNO3



Contact Information:


Vishnupriya Chemicals Pvt. Ltd.


Office No. 7, Meridian apartments

Lake Hills Road, New MLA Quarters

Basheerbagh, Hyderabad 63,  A.P

Tel :  040 - 23225550

Fax : 040 23223177

Email :

Website :


Section 2: Composition and Information on Ingredients






% by Weight

Potassium Nitrate




Toxicological Data on Ingredients:  Potassium nitrate: ORAL (LD50): Acute: 3750 mg/kg [Rat]. 1901 mg/kg [Rabbit].


Section 3: Hazards Identification


Potential Acute Health Effects:

Hazardous in case of skin contact (irritant), of eye contact (irritant), of ingestion, of inhalation (lung irritant).

Prolonged exposure may result in skin burns and ulcerations. Over-exposure by inhalation may cause respiratory irritation.


Potential Chronic Health Effects:





The substance may be toxic to blood, kidneys, central nervous system (CNS).

Repeated or prolonged exposure to the substance can produce target organs damage.


Section 4: First Aid Measures


Eye Contact:

Check for and remove any contact lenses. In case of contact, immediately flush eyes with plenty of water for at least 15 minutes. Cold water may be used. Get medical attention.


Skin Contact:

In case of contact, immediately flush skin with plenty of water. Cover the irritated skin with an emollient. Remove contaminated clothing and shoes. Cold water may be used. Wash clothing before reuse. Thoroughly clean shoes before reuse. Get medical attention.


Serious Skin Contact:

Wash with a disinfectant soap and cover the contaminated skin with an anti-bacterial cream. Seek immediate medical attention.



If inhaled, remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical attention.


Serious Inhalation:

Evacuate the victim to a safe area as soon as possible. Loosen tight clothing such as a collar, tie, belt or waistband. If breathing is difficult, administer oxygen. If the victim is not breathing, perform mouth-to-mouth resuscitation. Seek medical attention.



Do NOT induce vomiting unless directed to do so by medical personnel. Never give anything by mouth to an unconscious person. If large quantities of this material are swallowed, call a physician immediately. Loosen tight clothing such as a collar, tie, belt or waistband.


Serious Ingestion: Not available.


Section 5: Fire and Explosion Data


Flammability of the Product: Non-flammable.


Auto-Ignition Temperature: Not applicable.


Flash Points: Not applicable.


Flammable Limits: Not applicable.


Products of Combustion: Not available.


Fire Hazards in Presence of Various Substances: Not applicable.


Explosion Hazards in Presence of Various Substances:

Risks of explosion of the product in presence of static discharge: Not available.

Slightly explosive in presence of shocks, of heat.


Fire Fighting Media and Instructions: Not applicable.


Special Remarks on Fire Hazards:

In contact with easily oxidizable substances, it may react rapidly enough to cause ignition, violent combustion, or explosion.

It increases the flammability of any combustible substance.

A mixture of potassium nitrate and calcium silicide is a readility ignited primer and burns at a very high temperature.

Contact of the carbide with molten potassium nitrate causes incandescence. When heated to decomposition it emits very toxic fumes.


Special Remarks on Explosion Hazards:

A mixture of potassium nitrate and antimony trisulfide explodes when heated.

When copper phosphide is mixed with potassium nitrate and heated, it explodes.

Mixture of germanium nitrate and potassium nitrate explodes when heated.

A mixture of potassium nitrate, sulfur, arsenic trisulfide is known as a pyrotechnic formulation.

When titanium is heated with potassium nitrate, an explosion occurs.

A mixture of potassium nitrate and titanium disulfide explodes when heated.

When potassium nitrate is mixed with boron, laminac, and trichloroethylene an explosion can occur.

Powdered zinc and potassium explode if heated.

Arsenic disulfide forms explosive mixtures when mixed with potassium nitrate.

Charcoal (powdered carbon) and potassium nitrate make a pyrotechnic mixture. Contact at 290 C causes a vigorous

combustion and the mixture explodes on heating.

A mixture of potassium nitrate and sodium acetate may cause an explosion.

A mixture of potassium nitrate and sodium hypophosphite constitutes a powerful explosive.

Mixtures of potassium nitrate with sodium phosphinate and sodium thiosulfate are explosive.


Section 6: Accidental Release Measures


Small Spill: Use appropriate tools to put the spilled solid in a convenient waste disposal container.


Large Spill:

Oxidizing material.

Stop leak if without risk. Avoid contact with a combustible material (wood, paper, oil, clothing...). Keep substance damp using water spray. Do not touch spilled material. Prevent entry into sewers, basements or confined areas; dike if needed. Call for assistance on disposal.


Section 7: Handling and Storage



Keep away from heat. Keep away from sources of ignition. Keep away from combustible material.. Do not ingest. Do not breathe dust. Wear suitable protective clothing. In case of insufficient ventilation, wear suitable respiratory equipment. If ingested, seek medical advice immediately and show the container or the label. Avoid contact with skin and eyes. Keep away from incompatibles such as reducing agents, combustible materials, organic materials, metals.



Hygroscopic. Keep container tightly closed. Keep container in a cool, well-ventilated area. Separate from acids, alkalies, reducing agents and combustibles. See NFPA 43A, Code for the Storage of Liquid and Solid Oxidizers.


Section 8: Exposure Controls/Personal Protection


Engineering Controls:

Use process enclosures, local exhaust ventilation, or other engineering controls to keep airborne levels below recommended exposure limits. If user operations generate dust, fume or mist, use ventilation to keep exposure to airborne contaminants below the exposure limit.


Personal Protection:

Splash goggles. Lab coat. Dust respirator. Be sure to use an approved/certified respirator or equivalent.  Gloves.


Personal Protection in Case of a Large Spill:

Splash goggles. Full suit. Dust respirator. Boots. Gloves. A self contained breathing apparatus should be used to avoid inhalation of the product. Suggested protective clothing might not be sufficient; consult a specialist BEFORE handling this product.


Exposure Limits: Not available.


Section 9: Physical and Chemical Properties


Physical state and appearance: Solid. (Crystalline solid. Granular solid.)


Odor: Odorless.


Taste: Cooling, Saline. Pungent.


Molecular Weight: 101.1 g/mole


Color: White.


pH (1% soln/water): Not available.


Boiling Point: Decomposition temperature: 400C (752F)


Melting Point: 334C (633.2F)


Critical Temperature: Not available.


Specific Gravity: 2.109 (Water = 1) @ 16 degrees C


Vapor Pressure: Not applicable.


Vapor Density: Not available.


Volatility: Not available.


Odor Threshold: Not available.


Water/Oil Dist. Coeff.: Not available.


Ionicity (in Water): Not available.


Dispersion Properties: See solubility in water.



Easily soluble in hot water.

Soluble in cold water.

Insoluble in diethyl ether.

Soluble in liquid ammonia, glycerin, and absolute alcohol.

Solubility in water: 1g/2.8 ml water @ 25 C.; 13.3 g/100 ml water @ 0 C; 1g/0.5 ml boiling water.


Section 10: Stability and Reactivity Data


Stability: The product is stable.


Instability Temperature: Not available.


Conditions of Instability: Incompatible materials, dust generation


Incompatibility with various substances: Reactive with reducing agents, combustible materials, organic materials,


Corrosivity: Non-corrosive in presence of glass.


Special Remarks on Reactivity:

Hygroscopic; keep container tightly closed.

Potassium nitrate reacts vigorously when heated with sulfides of the alkaline earth group including barium sulfide and calcium sulfide.

Also incompatible with boron, and finely powdered metals, chromium nitride, aluminum, titanium, anitimony, germanium, zinc, zirconium, calcium disilicide, metal sulfides, carbon, sulfur, phosphorus, phosphides, sodium phosphinate, sodium thiosulfate, citric acid, tin chloride, sodium acetate, throium carbide.


Special Remarks on Corrosivity: Not available.


Polymerization: Will not occur.


Section 11: Toxicological Information


Routes of Entry: Inhalation. Ingestion.


Toxicity to Animals: Acute oral toxicity (LD50): 1901 mg/kg [Rabbit].


Chronic Effects on Humans: May cause damage to the following organs: blood, kidneys, central nervous system (CNS).


Other Toxic Effects on Humans: Hazardous in case of skin contact (irritant), of ingestion, of inhalation (lung irritant).


Special Remarks on Toxicity to Animals: Not available.


Special Remarks on Chronic Effects on Humans:

May cause adverse reproductive effects based on animal test data.

May affect genetic material (mutagenic)


Special Remarks on other Toxic Effects on Humans:

Acute Potential Health Effects:

Skin: Causes skin irritation.

Eyes: Causes eye irritation

Inhalation: Breathing Potassium Nitrate can irritate the nose and throat causing sneezing and coughing. High levels can interfere with the ability of the blood to carry oxygen causing headache, dizziness and a blue color to the skin and lips (methemoglobinemia), and other symtoms of methemoglobinemia (see other symptoms under ingestion). Higher levels can cause trouble breathing, circulatory collapse and even death.

Ingestion: Ingestion of large quantities may cause violent gastroenteritis with nausea, vomiting, severe abdominal pain. It may also cause colic and diarrhea. Acute toxicity of nitrate occurs as a result of reduction to nitrite. The nitrite acts in the blood to oxidize hemoglobin to methemoglobin which does not perform as an oxygen carrier to tissues causing Methenoglobinemia. Symptoms may include vertigo, muscular weakness, syncope, irregular pulse, convulsions, anoxia, coma, fall in blood pressure, roaring sound in the ears, a persistant throbbing headache, generalized tingling sensation, heart palpitations, visual disturbances caused by increased intraocular tension and intracranial pressure, flushed and perspiring skin, which is later cold and cyanotic. Circulatory collapse and death may occur.

Chronic Potential Health Effects:

Ingestion and Inhalation: Repeated or prolonged exposure to small amounts may affect the blood, respiration and kidneys and produce anemia, Methenoglobinemia with attendant cyanosis and anoxia, hyperpnea and later dyspnea, and nephritis.


Section 12: Ecological Information


Ecotoxicity: Not available.


BOD5 and COD: Not available.


Products of Biodegradation:

Possibly hazardous short term degradation products are not likely. However, long term degradation products may arise.


Toxicity of the Products of Biodegradation: The products of degradation are less toxic than the product itself.


Special Remarks on the Products of Biodegradation: Not available.


Section 13: Disposal Considerations


Waste Disposal:

Waste must be disposed of in accordance with federal, state and local environmental control regulations.





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