Name: Potassium Nitrate
CAS: 7757-79-1
EC Number: 231-818-8
Chemical Formular: KNO3
Appearance: colourless
Molecular Weight: 101.102 g/mol
Melting Point: 334 °C (633 °F; 607 K)
Boiling Point: 400 °C (752 °F; 673 K)
Density: 2.109 g/cm3 (16 °C)
Solubility in water: soluble
Exact Mass: 100.952 g/mol
Monoisotopic Mass: 100.952 g/mol
Topological Polar Surface Area: 62.9 A^2
Complexity: 18.8

Potassium Nitrate
99% Potassium Nitrate
99.9% Potassium Nitrate
99.99% Potassium Nitrate
99.999% Potassium Nitrate
Potassium Nitrate,customized specifications


According to the UN GHS revision 8

Version: 1.0

Creation Date: Sep 14, 2020

Revision Date: Sep 14, 2020

SECTION 1: Identification


GHS Product identifier

Product name

Potassium Nitrate


Other means of identification

Product number

Other names

Potassium nitrate;


Recommended use of the chemical and restrictions on use

Identified uses

Food additives

Uses advised against

no data available


Supplier’s details


Elements China Limited


Building 2, No.5555, Shenzhuan Hwy, Shanghai , China



1.5Emergency phone number

Emergency phone number


Service hours

Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

SECTION 2: Hazard identification


Classification of the substance or mixture

Oxidizing solids, Category 3


GHS label elements, including precautionary statements

Signal word


Hazard statement(s)

H272 May intensify fire; oxidizer

Precautionary statement(s)

P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.

P220 Keep away from clothing and other combustible materials.

P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…


P370+P378 In case of fire: Use … to extinguish.




P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal.


Other hazards which do not result in classification

no data available

SECTION 3: Composition/information on ingredients



Chemical nameCommon names and synonymsCAS numberEC number
Potassium NitratePotassium nitrate7757-79-1231-818-8

SECTION 4: First-aid measures


Description of necessary first-aid measures

If inhaled

Fresh air, rest. Refer for medical attention.

Following skin contact

Remove contaminated clothes. Rinse and then wash skin with water and soap.

Following eye contact

First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.

Following ingestion

Rinse mouth. Refer for medical attention .


Most important symptoms/effects, acute and delayed

Exposure can cause mild irritation of eyes, nose and throat. (USCG, 1999)


Indication of immediate medical attention and special treatment needed, if necessary

Maintain an open airway and assist ventilation if necessary. Administer supplemental oxygen. Treat hypotension with supine positioning, intravenous crystalloid fluids, and a low dose -pressor if needed. Monitor vital signs and ECG for 4 to 6 hours. Symptomatic methemoglobinemia may be treated with methylene blue. … Administer activated charcoal. Gastric emptying is not necessary for small ingestions if activated charcoal can be given promptly . Hemodialysis and hemoperfusion are not effective. Severe methemoglobinemia in infants not responsive to methylene blue therapy may require exchange transfusion. Nitrates and Nitrites

SECTION 5: Fire-fighting measures


Suitable extinguishing media

If material on fire or involved in fire: Flood with water. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible.


Specific hazards arising from the chemical

Special Hazards of Combustion Products: May produce toxic nitrogen oxides upon decomposition. Behavior in Fire: Strong oxidizer which may react explosively when mixed with reducing agents. Mixture may detonate by heat or shock. Increases the flammability of any combustible material. (USCG, 1999)


Special protective actions for fire-fighters

In case of fire in the surroundings, use appropriate extinguishing media.

SECTION 6: Accidental release measures


Personal precautions, protective equipment and emergency procedures

Sweep spilled substance into plastic or glass containers. Wash away remainder with plenty of water.


Environmental precautions

Sweep spilled substance into plastic or glass containers. Wash away remainder with plenty of water.


Methods and materials for containment and cleaning up

Sweep spilled substance into plastic or glass containers. Wash away remainder with plenty of water.

SECTION 7: Handling and storage


Precautions for safe handling

NO contact with combustible substances or reducing agents.
Handling in a well ventilated place.
Wear suitable protective clothing.
Avoid contact with skin and eyes.
Avoid formation of dust and aerosols.
Use non-sparking tools.
Prevent fire caused by electrostatic discharge steam.


Conditions for safe storage, including any incompatibilities

Separated from combustible substances and reducing agents.Separated from combustible and reducing substances.

SECTION 8: Exposure controls/personal protection


Control parameters

Occupational Exposure limit values

ComponentPotassium nitrate
CAS No.7757-79-1
 Limit value – Eight hoursLimit value – Short term
Latvia 5  


Biological limit values

no data available


Appropriate engineering controls

Ensure adequate ventilation.
Handle in accordance with good industrial hygiene and safety practice.
Set up emergency exits and the risk-elimination area.

8.3Individual protection measures, such as personal protective equipment (PPE)

Eye/face protection

Wear safety goggles.

Skin protection

Protective gloves.

Respiratory protection

Use local exhaust or breathing protection.

Thermal hazards

no data available

SECTION 9: Physical and chemical properties and safety characteristics

Physical state

Potassium nitrate is a white to dirty gray crystalline solid. Water soluble. Noncombustible, but accelerates the burning of combustible materials. If large quantities are involved in fire or the combustible material is finely divided an explosion may result. May explode under prolonged exposure to heat or fire. Toxic oxides of nitrogen are produced in fires. Used in solid propellants, explosives, fertilizers.


Colorless, rhombic or trigonal crystals



Melting point/freezing point


Boiling point or initial boiling point and boiling range



Not combustible but enhances combustion of other substances. Gives off irritating or toxic fumes (or gases) in a fire.

Lower and upper explosion limit/flammability limit

no data available

Flash point


Auto-ignition temperature

no data available

Decomposition temperature



4,5-8,5 (5 % solution)

Kinematic viscosity

no data available


Sol in water, glycerol; slightly sol in alcohol

Partition coefficient n-octanol/water

no data available

Vapour pressure

no data available

Density and/or relative density


Relative vapour density

no data available

Particle characteristics

no data available

SECTION 10: Stability and reactivity



Decomposes on heating. This increases fire hazard. The substance is a strong oxidant. It reacts with combustible and reducing materials.


Chemical stability

no data available


Possibility of hazardous reactions

Not combustible but enhances combustion of other substances … Risk of fire and explosion on contact with reducing agents.POTASSIUM NITRATE mixed with alkyl esters may explode, owing to the formation of alkyl nitrates; mixtures with phosphorus, tin (II) chloride, or other reducing agents may react explosively [Bretherick 1979. p. 108-109]. Powdered antimony mixed with potassium nitrate explodes when heated [Mellor 9:282 1946-47]. A mixture of antimony trisulfide and potassium nitrate explodes at a red heat [Mellor 9:524. 1946-47]. Arsenic disulfide forms explosive mixtures when mixed with potassium nitrate, [Mellor 9:270.1946-47]. A mixture of sodium acetate and potassium nitrate may cause an explosion [Pieters 1957. p. 30]. A mixture of potassium nitrate and sodium hypophosphite constitutes a powerful explosive [Mellor 8:881. 1946-47]. A mixture of powdered zirconium and potassium nitrate explodes when heated above the melting point [Mellor 7:116. 1946-47].


Conditions to avoid

no data available


Incompatible materials

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.


Hazardous decomposition products

When heated to decomp it emits very toxic fumes of /nitrogen oxides & dipotassium oxide/.

SECTION 11: Toxicological information

Acute toxicity

  • Oral: LD50 Rabbit oral 1901 mg/kg
  • Inhalation: no data available
  • Dermal: no data available

Skin corrosion/irritation

no data available

Serious eye damage/irritation

no data available

Respiratory or skin sensitization

no data available

Germ cell mutagenicity

no data available


no data available

Reproductive toxicity

no data available

STOT-single exposure

The substance is irritating to the eyes, skin and respiratory tract. Ingestion could cause effects on the blood. This may result in the formation of methaemoglobin. The effects may be delayed. Medical observation is indicated.

STOT-repeated exposure

no data available

Aspiration hazard

Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed.

SECTION 12: Ecological information



  • Toxicity to fish: LC50; Species: Lepomis macrochirus (Bluegill); Conditions: freshwater; static; Concentration: 5500 mg/L for 24 hr /total
  • Toxicity to daphnia and other aquatic invertebrates: LC50; Species: Daphnia magna (Water flea); Conditions: freshwater; static; Concentration: 900 mg/L for 4.2 days /total
  • Toxicity to algae: no data available
  • Toxicity to microorganisms: no data available


Persistence and degradability

no data available


Bioaccumulative potential

no data available


Mobility in soil

no data available


Other adverse effects

no data available

SECTION 13: Disposal considerations


Disposal methods


The material can be disposed of by removal to
a licensed chemical destruction plant or by controlled incineration
with flue gas scrubbing. Do not contaminate water, foodstuffs,
feed or seed by storage or disposal. Do not discharge to sewer systems.

Contaminated packaging

Containers can be triply rinsed (or equivalent) and
offered for recycling or reconditioning.
Alternatively, the packaging can be punctured to
make it unusable for other purposes and then be disposed of
in a sanitary landfill. Controlled incineration
with flue gas scrubbing is possible for combustible packaging materials.

SECTION 14: Transport information


UN Number

ADR/RID: UN1486 (For reference only, please check.)IMDG: UN1486 (For reference only, please check.)IATA: UN1486 (For reference only, please check.)


UN Proper Shipping Name

ADR/RID: POTASSIUM NITRATE (For reference only, please check.)IMDG: POTASSIUM NITRATE (For reference only, please check.)IATA: POTASSIUM NITRATE (For reference only, please check.)


Transport hazard class(es)

ADR/RID: 5.1 (For reference only, please check.)IMDG: 5.1 (For reference only, please check.)IATA: 5.1 (For reference only, please check.)


Packing group, if applicable

ADR/RID: III (For reference only, please check.)IMDG: III (For reference only, please check.)IATA: III (For reference only, please check.)


Environmental hazards



Special precautions for user

no data available


Transport in bulk according to IMO instruments

no data available

SECTION 15: Regulatory information


Safety, health and environmental regulations specific for the product in question

Chemical nameCommon names and synonymsCAS numberEC number
Potassium NitratePotassium nitrate7757-79-1231-818-8
European Inventory of Existing Commercial Chemical Substances (EINECS)Listed.
EC InventoryListed.
United States Toxic Substances Control Act (TSCA) InventoryListed.
China Catalog of Hazardous chemicals 2015Listed.
New Zealand Inventory of Chemicals (NZIoC)Listed.
Philippines Inventory of Chemicals and Chemical Substances
Vietnam National Chemical InventoryListed.
Chinese Chemical Inventory of Existing Chemical Substances (China
Korea Existing Chemicals List (KECL)Listed.

SECTION 16: Other information

Information on revision

Creation DateSep 14, 2020
Revision DateSep 14, 2020

Abbreviations and acronyms

  • CAS: Chemical Abstracts Service
  • ADR: European Agreement concerning the International Carriage of Dangerous Goods by Road
  • RID: Regulation concerning the International Carriage of Dangerous Goods by Rail
  • IMDG: International Maritime Dangerous Goods
  • IATA: International Air Transportation Association
  • TWA: Time Weighted Average
  • STEL: Short term exposure limit
  • LC50: Lethal Concentration 50%
  • LD50: Lethal Dose 50%
  • EC50: Effective Concentration 50%


  • IPCS – The International Chemical Safety Cards (ICSC), website:
  • HSDB – Hazardous Substances Data Bank, website:
  • IARC – International Agency for Research on Cancer, website:
  • eChemPortal – The Global Portal to Information on Chemical Substances by OECD, website:
  • CAMEO Chemicals, website:
  • ChemIDplus, website:
  • ERG – Emergency Response Guidebook by U.S. Department of Transportation, website:
  • Germany GESTIS-database on hazard substance, website:
  • ECHA – European Chemicals Agency, website:

Other Information

Rinse contaminated clothing with plenty of water because of fire hazard.Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available.

Any questions regarding this SDS, Please send your inquiry to [email protected]

Disclaimer: The above information is believed to be correct but does not purport to be all inclusive and
shall be used only as a guide. The information in this document is based on the present state of our
knowledge and is applicable to the product with regard to appropriate safety precautions. It does not
represent any guarantee of the properties of the product. We as supplier shall not be held liable for any
damage resulting from handling or from contact with the above product.

Chemical Formular:KNO3
PubChem CID:24434
IUPAC Name:potassium;nitrate
Canonical SMILES:[N+](=O)([O-])[O-].[K+]
Globally Harmonized System of Classification
Globally Harmonized System of Classification
GHS Hazard Statements:H272
Hazard Codes:O:Oxidizingagent;
Risk Codes:8
Precautionary Statement Codes:P210-P220-P221-P370 + P378
Flash Point:n/a


PotassiumAn element in the alkali group of metals with an atomic symbol K, atomic number 19, and atomic weight 39.10. It is the chief cation in the intracellular fluid of muscle and other cells.
Potassium ion is a strong electrolyte that plays a significant role in the regulation of fluid volume and maintenance of the WATER-ELECTROLYTE BALANCE.
Potassium is the major cation (positive ion) inside animal cells, while sodium is the major cation outside animal cells. The concentration differences of these charged particles causes a difference in electric potential between the inside and outside of cells, known as the membrane potential.
The balance between potassium and sodium is maintained by ion pumps in the cell membrane. The cell membrane potential created by potassium and sodium ions allows the cell generate an action potential—a “spike” of electrical discharge.
The ability of cells to produce electrical discharge is critical for body functions such as neurotransmission, muscle contraction, and heart function.
Potassium is also an essential mineral needed to regulate water balance, blood pressure and levels of acidity.

NitrogenNitrogen is the chemical element with the symbol N and atomic number 7.
It was first discovered and isolated by Scottish physician Daniel Rutherford in 1772.
Although Carl Wilhelm Scheele and Henry Cavendish had independently done so at about the same time, Rutherford is generally accorded the credit because his work was published first.
The name nitrogène was suggested by French chemist Jean-Antoine-Claude Chaptal in 1790, when it was found that nitrogen was present in nitric acid and nitrates.
Antoine Lavoisier suggested instead the name azote, from the Greek ἀζωτικός “no life”, as it is an asphyxiant gas; this name is instead used in many languages, such as French, Russian, Romanian and Turkish, and appears in the English names of some nitrogen compounds such as hydrazine, azides and azo compounds.

OxygenOxygen is the chemical element with the symbol O and atomic number 8, meaning its nucleus has 8 protons.
Oxygen is a member of the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds.
Dioxygen is used in cellular respiration and many major classes of organic molecules in living organisms contain oxygen, such as proteins, nucleic acids, carbohydrates, and fats, as do the major constituent inorganic compounds of animal shells, teeth, and bone.
Oxygen was isolated by Michael Sendivogius before 1604, but it is commonly believed that the element was discovered independently by Carl Wilhelm Scheele, in Uppsala, in 1773 or earlier, and Joseph Priestley in Wiltshire, in 1774.

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