IPCS INCHEM Home
SODIUM TETRABORATE
ICSC: 1229
Peer-Review Status: 11.04.2014 Validated
Disodium tetraborate, anhydrous
Boric acid, disodium salt
Sodium biborate
Sodium pyroborate
Boron sodium oxide
Fused borax
CAS #: 1330-43-4 RTECS #: ED4588000
EC #: 005-011-00-4
EINECS #: 215-540-4
    Formula: Na2B4O7 / Na2*2B2O3
Molecular mass: 201.3

TYPES OF HAZARD
/ EXPOSURE
ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE-FIGHTING
FIRE Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.    In case of fire in the surroundings, use appropriate extinguishing media. 
EXPLOSION      
 
EXPOSURE   PREVENT DISPERSION OF DUST! STRICT HYGIENE!   
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
PACKAGING & 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.   
EC Classification
R: 60-61; S: 53-45; Symbol: T 
UN Classification
 
GHS Classification
Signal: Danger
Causes serious eye irritation
May cause respiratory irritation
May damage fertility or the unborn child 
excl mark;warncancer;health haz

EMERGENCY RESPONSE SAFE STORAGE
  Dry. Well closed. 

IMPORTANT DATA
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. 

Occupational exposure limits
TLV (inhalable fraction): 2 mg/m³ as TWA; 6 mg/m³ as STEL; A4 (not classifiable as a human carcinogen); (ACGIH 2014).
MAK (inhalable fraction): 0.75 mg/m³; Peak limitation category: I(1); Pregnancy risk group: C; (DFG 2013). 

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

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

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. 

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. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Decomposes at 1575°C
Melting point: 742°C
Relative density (water = 1): 2.4
Solubility in water, g/100ml at 20°C: 2.56  
The substance is harmful to aquatic organisms. 

NOTES
 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.
    See Also:
       Toxicological Abbreviations