Fisher Scientific Back to Potassium Nitrate (Colorless-to-white Crystals) 
Material Safety Data Sheet
Potassium Nitrate

ACC# 19470
Section 1 - Chemical Product and Company Identification

MSDS Name: Potassium Nitrate
Catalog Numbers: AC424150030, S77585, S77588, S77588-2, BP368 500, BP368-500, BP368500, P261 3, P261-3, P2613, P263 100, P263 3, P263 500, P263-100, P263-3, P263-50, P263-500, P263100, P2633, P263500, P26350KG, P383 100, P383 500, P383-100, P383-500, P383100, P383500
Nitric Acid Potassium Salt, Niter, Saltpeter
Company Identification:

       Fisher Scientific
       1 Reagent Lane
       Fairlawn, NJ 07410
For information, call:
Emergency Number:
For CHEMTREC assistance, call:
For International CHEMTREC assistance, call:

Section 2 - Composition, Information on Ingredients

CAS# Chemical Name Percent EINECS/ELINCS
7757-79-1Nitric acid potassium salt 100 231-818-8
Hazard Symbols: O
Risk Phrases:

Section 3 - Hazards Identification


Appearance: white. Danger! Strong oxidizer. Contact with othermaterial may cause a fire. May cause respiratory tract irritation.May cause kidney damage. May cause methemoglobinemia. May cause eyeand skin irritation. May cause digestive tract irritation withnausea, vomiting, and diarrhea. May cause blood abnormalities.
Target Organs: Blood, kidneys.

Potential Health Effects

Eye: May cause eye irritation.
Skin: Dust causes mechanical irritation. Low hazard for usual industrial handling.
Ingestion: Causes gastrointestinal irritation with nausea, vomiting and diarrhea.
Inhalation: May cause respiratory tract irritation. May cause methemoglobinemia, cyanosis, convulsions, tachycardia, dyspnea, and death.
Chronic: Prolonged exposure may cause anemia and methemoglobinemia, characterized by dizziness, drowsiness, headache, breath shortness, cyanosis, rapid heart rate and chocolate-brown colored blood. May cause kidney injury. May cause methemoglobinemia, which is characterized by chocolate-brown colored blood, headache, weakness, dizziness, breath shortness, cyanosis, rapid heart rate, unconsciousness and possible death.

Section 4 - First Aid Measures

Eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower lids. Get medical aid.
Skin: Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists. Wash clothing before reuse.
Ingestion: Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid.
Inhalation: Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
Notes to Physician: Treat symptomatically and supportively.

Section 5 - Firefighting Measures

General Information: Strong oxidizer. Contact with combustible materials may cause a fire. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Wear appropriate protective clothing to prevent contact with skin and eyes. Wear a self-contained breathing apparatus (SCBA) to prevent contact with thermal decomposition products. Containers may explode in the heat of a fire. Vapors may be heavier than air. They can spread along the ground and collect in low or confined areas. May decompose explosively when heated or involved in a fire. May accelerate burning if involved in a fire. May explode from heat or contamination.
Extinguishing Media: Cool containers with flooding quantities of water until well after fire is out. For small fires DO NOT use dry chemicals, carbon dioxide, halon or foams. USE WATER ONLY. For large fires flood fire with water from a distance.
Autoignition Temperature: Not available.
Flash Point: Not available.(estimated) Health: 1; Flammability: 1; Reactivity: 1 Explosion Limits, Lower: Not available. Upper: Not available.

Section 6 - Accidental Release Measures

General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks: Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, observing precautions in the Protective Equipment section. Avoid generating dusty conditions. Remove all sources of ignition. Provide ventilation. Do not use combustible materials such as paper towels to clean up spill.

Section 7 - Handling and Storage

Handling: Wash thoroughly after handling. Avoid prolonged or repeated contact with skin. Avoid contact with eyes. Keep container tightly closed. Avoid ingestion and inhalation. Use with adequate ventilation. Wash clothing before reuse. Keep away from clothing and other combustible materials.
Storage: Do not store near combustible materials. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep away from reducing agents.

Section 8 - Exposure Controls, Personal Protection

Engineering Controls: Use adequate ventilation to keep airborne concentrations low.
Exposure Limits
Chemical Name ACGIH NIOSH OSHA - Final PELs
Nitric acid potassium saltnone listednone listednone listed

OSHA Vacated PELs: Nitric acid potassium salt: No OSHA Vacated PELs are listed for this chemical.
Personal Protective Equipment
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166.
Skin: Wear appropriate gloves to prevent skin exposure.
Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators: Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.

Section 9 - Physical and Chemical Properties

Physical State: Solid
Appearance: white
Odor: odorless
pH: 4.5-7.0: 5% solution
Vapor Pressure: Not available.
Vapor Density: 3.5
Evaporation Rate:
Viscosity: Not available.
Boiling Point: Not available.
Freezing/Melting Point:334 deg C
Decomposition Temperature:400 deg C
Solubility: soluble in water
Specific Gravity/Density:2.1
Molecular Formula:KNO3
Molecular Weight:

Section 10 - Stability and Reactivity

Chemical Stability: Stable under normal temperatures and pressures.
Conditions to Avoid: Incompatible materials, dust generation, combustible materials, reducing agents.
Incompatibilities with Other Materials: Reacts violently with organic materials, combustible materials, and reducing agents. Specific incompatibles under various conditions include aluminum, titanium, antimony, germanium, zinc, zirconium, calcium disilicide, chromium nitride, metal sulfides, boron, carbon, sulfur, phosphorus, phosphides, sodium phosphinate, sodium thiosulfate, citric acid, tin chloride, sodium acetate, and thorium carbide.
Hazardous Decomposition Products: Nitrogen oxides, irritating and toxic fumes and gases, oxygen.
Hazardous Polymerization: Has not been reported.

Section 11 - Toxicological Information

CAS# 7757-79-1: TT3700000
CAS# 7757-79-1:
Oral, rabbit: LD50 = 1901 mg/kg;
Oral, rat: LD50 = 3750 mg/kg;
CAS# 7757-79-1: Not listed by ACGIH, IARC, NIOSH, NTP, or OSHA.
Epidemiology: No information available.
Teratogenicity: No information available.
Reproductive Effects: No information available.
Neurotoxicity: No information available.
Mutagenicity: No information available.
Other Studies: No data available.

Section 12 - Ecological Information

Ecotoxicity: Not available.
Environmental Fate: Not available.
Physical/Chemical: Not available.
Other: Not available.

Section 13 - Disposal Considerations

Dispose of in a manner consistent with federal, state, and local regulations.
RCRA D-Series Maximum Concentration ofContaminants: None listed.
RCRA D-Series Chronic Toxicity ReferenceLevels: None listed.
RCRA F-Series: None listed.
RCRA P-Series: None listed.
RCRA U-Series: None listed.

Section 14 - Transport Information

Shipping Name:POTASSIUM NITRATENo information available.No information available.No information available.POTASSIUM NITRATE
Hazard Class:5.15.1
UN Number:UN1486UN1486
Packing Group:IIIIII

Section 15 - Regulatory Information


CAS# 7757-79-1 is listed on the TSCA inventory.
Health & Safety Reporting List
None of the chemicals are on the Health & Safety Reporting List.
Chemical Test Rules
None of the chemicals in this product are under a Chemical Test Rule.
Section 12b
None of the chemicals are listed under TSCA Section 12b.
TSCA Significant New Use Rule
None of the chemicals in this material have a SNUR under TSCA.

Section 302 (RQ)
None of the chemicals in this material have an RQ.
Section 302 (TPQ)
None of the chemicals in this product have a TPQ.
SARA Codes
CAS # 7757-79-1: flammable.
Section 313
No chemicals are reportable under Section 313.
Clean Air Act:
This material does not contain any hazardous air pollutants. This material does not contain any Class 1 Ozone depletors. This material does not contain any Class 2 Ozone depletors.
Clean Water Act:
None of the chemicals in this product are listed as Hazardous Substances under the CWA. None of the chemicals in this product are listed as Priority Pollutants under the CWA. None of the chemicals in this product are listed as Toxic Pollutants under the CWA.
None of the chemicals in this product are considered highly hazardous by OSHA.
CAS# 7757-79-1 can be found on the following state right to know lists: New Jersey, Florida, Pennsylvania, Massachusetts.
California No Significant Risk Level: None of the chemicals in this product are listed. European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols:
Risk Phrases:

R 8 Contact with combustible material may cause fire.
Safety Phrases:

WGK (Water Danger/Protection)

CAS# 7757-79-1: 1
CAS# 7757-79-1 is listed on Canada's DSL/NDSL List.
This product has a WHMIS classification of C, D2A.
CAS# 7757-79-1 is not listed on Canada's Ingredient Disclosure List.
Exposure Limits
CAS# 7757-79-1: OEL-THE NETHERLANDS:TWA 2 ppm (5 mg/m3) OEL-RUSSIA:
STEL 5 mg/m3

Section 16 - Additional Information

MSDS Creation Date: 1/04/1995
Revision #16 Date: 8/14/1998
The information above is believed to be accurate and represents the best information currently available to us. However, we make no warranty of merchantability or any other warranty, express or implied, with respect to such information, and we assume no liability resulting from its use. Users should make their own investigations to determine the suitability of the information for their particular purposes. In no way shall Fisher be liable for any claims, losses, or damages of any third party or for lost profits or any special, indirect, incidental, consequential or exemplary damages, howsoever arising, even if Fisher has been advised of the possibility of such damages.