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SODIUM TETRABORATEICSC: 1229
Disodium tetraborate, anhydrous
Boric acid, disodium salt
Sodium biborate
Sodium pyroborate
Boron sodium oxide
Fused borax
April 2014
CAS #: 1330-43-4
EC Number: 215-540-4

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.        In case of fire in the surroundings, use appropriate extinguishing media.   

 PREVENT DISPERSION OF DUST! STRICT HYGIENE!  
  SYMPTOMS PREVENTION FIRST AID
Inhalation Cough. Sore throat. Shortness of breath.  Use local exhaust or breathing protection.  Fresh air, rest. 
Skin Redness.  Protective gloves. Protective clothing.  Rinse and then wash skin with water and soap. 
Eyes Redness. Pain.  Wear safety spectacles or eye protection in combination with breathing protection.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Nausea. Vomiting. Abdominal pain. Diarrhoea. Weakness. Drowsiness.  Do not eat, drink, or smoke during work.  Rinse mouth. Do NOT induce vomiting. Refer immediately for medical attention. 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations. 

According to UN GHS Criteria

excl mark;warncancer;health haz
DANGER
Causes serious eye irritation
May cause respiratory irritation
May damage fertility or the unborn child 

Transportation
UN Classification
 

STORAGE
Dry. Well closed. 
PACKAGING
 
SODIUM TETRABORATE ICSC: 1229
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS-TO-WHITE HYGROSCOPIC CRYSTALS OR POWDER. TURNS OPAQUE ON EXPOSURE TO AIR. 

Physical dangers
 

Chemical dangers
Decomposes at 1575°C. This produces toxic fumes including sodium oxide. 

Formula: Na2B4O7 / Na2*2B2O3
Molecular mass: 201.3
Decomposes at 1575°C
Melting point: 742°C
Relative density (water = 1): 2.4
Solubility in water, g/100ml at 20°C: 2.56  


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion. 

Effects of short-term exposure
The substance is irritating to the eyes, skin and respiratory tract. The substance may cause effects on the central nervous system and kidneys. This may result in impaired functions. 

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly , especially if powdered. 

Effects of long-term or repeated exposure
Repeated or prolonged contact with skin may cause dermatitis. The substance may have effects on the upper respiratory tract and testes. Animal tests show that this substance possibly causes toxicity to human reproduction or development. 


OCCUPATIONAL EXPOSURE LIMITS
TLV: (inhalable fraction): 2 mg/m3, as TWA; 6 mg/m3 as STEL; A4 (not classifiable as a human carcinogen).
MAK: 0.75 mg/m3; peak limitation category: I(1); pregnancy risk group: C 

ENVIRONMENT
The substance is harmful to aquatic organisms. 

NOTES
 

ADDITIONAL INFORMATION
  EC Classification
R: 60-61; S: 53-45; Symbol: T 

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    See Also:
       Toxicological Abbreviations