MSDS of Tungsten Bar

 CHEMICAL NAME:
 Tungsten and tungsten material, tungsten bar,tungsten-nickel-copper or tungsten-nickel-iron heavy alloy

 Trade Name and Synonyms: All CHINATUNGSTEN ONLINE’S TUNGSTEN PRODUCTS

 Chemical Family: Refractory Metal Tungsten

 Molecular Weight : N/A

PHYSICAL DATA

  Appearance and Odor: Dark Gray Metal/No Odor

Boiling Point: 5927℃

Specific Gravity (H20=1): 11.0 to 15.5

Vapor Pressure (mm Hg): N/A

Percentage Volatile by Volume: 0

Vapor Density (Air=1): N/A

Evaporation Rate: N/A

Solubility in Water: Insoluble

How Best Monitored: Air Sample

HAZARDOUS INGREDIENTS

Material

% by Weight

OSHA PEL

ACGIH TLV

Tungsten Carbide (limits Tungsten dust)

41-97%*

---

5 mg/m 3

Cobalt and other elements

3-10% *

0.1 mg/m3

0.1 mg/m3

HEALTH HAZARD DATA

 Routes of Exposure: Production and applying process might bring about dust of potentially hazardous ingredients, which can be  inhaled, swallowed or come in contact with the skin or eyes.

 Effects of Overexposure:
 Inhalation - Dust from grinding can cause irritation of the nose and throat. It has also has the potential for causing transient or  permanent respiratory disease, including occupational asthma and interstitial fibrosis, in a small percentage of exposed  individuals. It is reported that cobalt dust is the most probable cause of such respiratory diseases. Symptoms include  productive cough, wheezing, shortness of breath, chest-tightness and weight loss. Interstitial fibrosis (lung scarring) can lead  to permanent disability or death. Certain pulmonary conditions may be aggravated by exposure.
 Skin Contact –Can cause irritation or an allergic skin rash due to cobalt sensitization in case tungsten be used in production  process. Certain skin conditions, such as dry skin, may be aggravated by exposure.
 Eye Contact - Can cause irritation.
 Ingestion - Reports outside the industry suggest that ingestion of significant amounts of cobalt has the potential for causing  blood, heart and other organ problems.

 Emergency and First Aid Procedures: Applicable for dusts or mists.
 Inhalation - If symptoms of pulmonary involvement develop (coughing, wheezing, shortness of breath, etc.), remove from  exposure and seek medical attention.
 Skin Contact - If irritation or rash occurs, thoroughly wash affected area with soap and water and isolate from exposure. If  irritation or rash persists, seek medical attention.
 Eye Contact - If irritation occurs, flush with copious amounts of water. If irritation persists, seek medical attention.
 Eye Contact - If irritation occurs, flush with copious amounts of water. If irritation persists, seek medical attention.

 Carcinogenic Assessment (NTP Annual Report, IARC Monographs, other):
 None of the components of this material have been identified as known suspected carcinogens by NTP, IARC or OSHA

 Chemical Name:
 Tungsten and tungsten material, tungsten-nickel-copper or tungsten-nickel-iron heavy alloy.

FIRE AND EXPLOSION HAZARD DATA

 Flash Point: N/A Test Method Used: --- Flammable Limits: N/A LEL:--- UEL: ---
 Tungsten Particles, High Density Alloy and Hard Cemented Carbide Product are not fire hazards. Dusts generated in grinding  operations may ignite if allowed to accumulate and subjected to an ultra-high temperature ignition source.

 Extinguishing Media:
 For powder, smother with dry sand, dry dolomite, ABC type fire extinguisher, or flood with water.

 Special Fire Fighting Procedures:
 For a powder fire confined to a small area, use a respirator approved for toxic dusts and fumes. For a large fire, fire fighters  should use self-contained breathing apparatus.

 Unusual Fire and Explosion Hazards:
 During production process, dusts may present a fire or explosion hazard under rare favoring conditions of particle size,  dispersion and ultra-high temperature ignition source. However, this is not expected to be a problem under normal packaging  and dust-proof handling conditions.

REACTIVITY DATA

Stability:

Unstable

Conditions to Avoid: N/A

Stable

X

    Incompatibility: Contact with dust with strong oxidizers may cause fire or explosions.

Materials to Avoid: Strong Acids

Hazardous Decomposition Products: None

Hazardous Polymerization:

May Occur

Conditions to Avoid: N/A

Will not Occur

X

SPILL OR LEAKS PROCEDURES

 Steps to be Taken In Case Material is Released or Spilled: Ventilate area of spill. Clean up using methods which avoid dust  generation such as vacuum (with appropriate filter to prevent airborne dust levels which exceed the PEL or TLV), wet dust mop  or wet clean-up. If airborne dust is generated, use appropriate NIOSH approved respirator.

 Waste Disposal Method: Dispose of in accordance with appropriate government regulations. May be sold as scrap for reclaim.

SPECIAL PRECAUTIONS

 Precautions to be Taken in Handling and Storage: Maintain good housekeeping procedures to prevent dust accumulation during  grinding. Avoid dust inhalation and direct skin contact with dust.

 Other Precautions: Clean up using methods which avoid dust generation such as vacuum (with appropriate filter to prevent  airborne dust levels which exceed the PEL or TLV), wet dust mop or wet clean-up. If airborne dust is generated, use an  appropriate NIOSH approved respirator.
 Wash hands thoroughly after handling, before eating or smoking. Wash exposed skin at the end of the work shift. Do not  shake clothing, rags or other items to remove dust. Dust should be removed by washing or vacuuming (with appropriate filters)  the clothing, rags, or other items.
 Periodic medical examinations are recommended for individuals regularly exposed to dust or mist.