MSDS of Sodium Nitrite - Engineering - http://maxpages.com/jpchemical/MSDS_of_Sodium

Sodium Nitrite

Disclaimer:
JPCHEMICAL NET provides the information contained herein in good faith but makes no representation as to its comprehensiveness or accuracy. This document is intended only as a guide to the appropriate precautionary handling of the material by a properly trained person using this product. Individuals receiving the information must exercise their independent judgment in determining its appropriateness for a particular purpose. ACCORDINGLY, JPCHEMICAL NET, INC. WILL NOT BE RESPONSIBLE FOR DAMAGES RESULTING FROM USE OF OR RELIANCE UPON THIS INFORMATION.

CHEMICAL PRODUCT
Material Identification
Formula: NaNO2 (in water)
CAS Name: NITROUS ACID, SODIUM SALT
Grade: TECHNICAL; OXIDIZING SALT SOLUTION

HAZARDS IDENTIFICATION
Potential Health Effects
Harmful or fatal if swallowed. Harmful if inhaled. Overexposure by inhalation or ingestion may cause reduced oxygen carrying capacity of blood. Causes skin and eye irritation.

Human Health Effects
Human health effects of overexposure to the product by skin or eye contact may include skin irritation with discomfort or rash; or eye irritation with discomfort, tearing, or blurring of vision. Sodium nitrite has been infrequently associated with skin sensitization in humans. By inhalation, irritation of the upper respiratory passages with coughing may occur. By inhalation or ingestion, the effects may include low blood pressure with headache and fainting, or nonspecific discomfort such as nausea or weakness. Overexposure may also cause methemoglobinemia (reduced oxygen carrying capacity of the blood) with cyanosis (bluish discoloration of the skin), possibly progressing to dizziness, incoordination, shortness of breath, increased pulse rate, and loss of consciousness.
Sodium nitrite can also react with certain amines forming compounds which may cause cancer, mutations, or other toxicity. These compounds, known as nitrosamines, can be formed in acidic environments such as that found in the stomach. Since many medications and chemicals contain an amine group, simultaneous exposure to nitrites should be avoided.
Carcinogenicity Information
None of the components present in this material at concentrations equal to or greater than 0.1% are listed by IARC, NTP, OSHA or ACGIH as a carcinogen.

FIRST AID MEASURES
Inhalation
If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen. Call a physician.
Skin Contact
In case of contact, immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing. Call a physician. Wash clothing before reuse.
Eye Contact
In case of contact, immediately flush eyes with plenty of water for at least 15 minutes. Call a physician.
Ingestion
If swallowed, immediately give two glasses of water and induce vomiting. Call a physician. Never give anything by mouth to an unconscious person.
Notes to Physicians
Absorption of this product into the body leads to the formation of methemoglobin which, in sufficient concentration, causes cyanosis. Since reversion of methemoglobin to hemoglobin occurs spontaneously after termination of exposure, moderate degrees of cyanosis need to be treated only by supportive measures such as bed rest and oxygen inhalation. Thorough cleansing of the entire contaminated area of the body including scalp and nails is of utmost importance. Cyanocobalamin (Vitamin B-12), 1 mg intramuscularly, will speed recovery. Intravenous fluids and blood transfusions may be indicated in very severe exposures.

FIRE FIGHTING MEASURES
Flammable Properties
Autodecomposition: 490° C (914° F) after drydown. Will not burn.
Fire and Explosion Hazards
Strong oxidizer when water is removed. Combustible materials may catch fire more easily after being wet with sodium nitrite and dried. Product intensifies combustion of other materials. Fires are difficult to extinguish. See "Decomposition".
Extinguishing Media
As appropriate for combustibles in area.
Fire Fighting Instructions
Flood with water.

ACCIDENTAL RELEASE MEASURES
Safeguards (Personnel)
NOTE: Review FIRE FIGHTING MEASURES and HANDLING (PERSONNEL) sections before proceeding with clean-up. Use appropriate PERSONAL PROTECTIVE EQUIPMENT during clean-up.
Accidental Release Measures
Flush spill area with plenty of water. Comply with Federal, State, and local regulations on reporting releases. The Superfund reportable discharge for sodium nitrite is 100 lbs.
HANDLING AND STORAGE
Handling (Personnel)
Do not take internally. Keep from contact with clothing and other combustible materials. Avoid contact with eyes and skin. Avoid breathing vapors or mist. Avoid breathing dust from dried-down product. Wash thoroughly after handling.

Storage
Do not store with acids, ammonium salts, cyanides, amines or reducing agents.

EXPOSURE CONTROLS/PERSONAL PROTECTION
Engineering Controls
Good general ventilation should be provided to minimize contact with vapors, or dust from dried-down product.
Personal Protective Equipment
Eye/Face: Coverall chemical splash goggles.
Protective Gloves: Rubber gloves.
If product is allowed to dry and dusty conditions exist, use NIOSH/MSHA approved respiratory protection.

Exposure Guidelines: Applicable Exposure Limits
Sodium Nitrite
PEL (OSHA): None Established
TLV (ACGIH): None Established
WEEL (AIHA): None Established

PHYSICAL AND CHEMICAL PROPERTIES
Physical Data
Solubility in Water: 100 WT% Technical and Oxidizing Salt Solution
Odor: Odorless
Form: Clear liquid

Properties Technical Grade Oxidizing Salt Solution
Color Pale Yellow Straw Colored
Boiling Pt., 760 mm Hg 115 deg C 114.5 deg C
(239 deg F) (238 deg F)
Freezing Point -1 deg C 10-20+deg+C+
+ (30+deg+F)+ (50-68+deg+F)+
Specific+Gravity+ 1.32+at+16+deg+C+ 1.4/16 deg C
(60 deg F) (34/60 deg F)
Vapor Pressure at:
25 deg C 17 mm Hg 50+mm+Hg+
38+deg+C+ 35+mm+Hg+ 90 mm Hg
Vapor Density (Air=1) Less than 1 Less than 1
pH Information 8.9 9
Evaporation Rate Greater than 1 Greater than 1

STABILITY AND REACTIVITY
Chemical Stability
Unstable with heat after dry down.
Decomposition
Decomposes with heat.
Decomposition temperature is 490° C (914° F) after drydown to produce oxygen and toxic nitrogen gases.
Polymerization
Polymerization will not occur.
Other Hazards
Incompatibility: Incompatible with acids, ammonium salts, amines, activated carbon, cyanides, and reducing agents. May react with secondary or tertiary amines to form nitrosamines. (Certain nitrosamines are cancer-suspect agents.)

TOXICOLOGICAL INFORMATION
Animal Data
Sodium Nitrite
Inhalation 4-hour LC50: 1.45 mg/L in rats
Oral LD50: 120 mg/kg in rats
The compound is an eye irritant, is untested for skin irritancy, but is not a skin sensitizer in animals. No local or systemic effects were reported after 30 days of skin exposure. By inhalation, two to four weeks exposure produced only increased activity of lung enzymes. By ingestion, the effect of a single exposure is reported to be methemoglobinemia. Repeated exposure produced methemoglobinemia, decreased hemoglobin, an increase in brain dopamine, and nonspecific effects such as weight loss and irritation. Long-term ingestion produced methemoglobinemia, and unspecified pathological changes in the liver, spleen, kidneys, adrenals, brain, heart, and lungs.
Tests in animals demonstrate no carcinogenic activity, or reproductive or developmental toxicity. Sodium nitrite appears to cross the placenta causing methemoglobinemia in the fetus after administration to the dam. In some tests, but not in others, the compound produced genetic damage in bacterial and mammalian cell cultures, as well as in tests in animals. It does not produce heritable genetic damage.

ECOLOGICAL INFORMATION
Ecotoxicological Information
Aquatic Toxicity: 96-hour LC50, minnows: >100 mg/L
DISPOSAL CONSIDERATIONS
Waste Disposal
Comply with Federal, State, and local regulations. If approved, flush to waste treatment system.

TRANSPORTATION INFORMATION
Shipping Information
DOT/IMO
Proper Shipping Name: TOXIC LIQUID, INORGANIC, N.O.S. (SODIUM NITRITE)
Hazard Class: 6.1
UN No. : 3287
DOT/IMO Label: TOXIC
Packing Group: III
Reportable Quantity: 100 lb
Shipping Containers: Tank Cars; Tank Trucks; Sample Bottles.

REGULATORY INFORMATION
U.S. Federal Regulations
TSCA Inventory Status: Reported/Included
Acute: Yes
Chronic: Yes
Fire: (Yes)*
Reactivity: No
Pressure: No
* Will not burn, but dried-down material is an oxidizer; can cause nearby combustible materials to burn more readily
Lists:
SARA Extremely Hazardous Substance: No
CERCLA Hazardous Substance: Yes
SARA Toxic Chemical: Yes
Canadian WHMIS Classification:
C; D-1B; D-2B

OTHER INFORMATION
Additional Information
NPCA-HMIS Ratings:
Health (Acute): 2*
Flammability: 0**
Reactivity: 1
Personal Protection: Varies
Personal Protection rating to be supplied by user depending on use conditions.
* Chronic
** Will not burn, but dried-down material is an oxidizer; can cause nearby combustible materials to burn more readily.

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Page Updated Fri Dec 12, 2008 8:48am EST