Boracic acid
Orthoboric acid
H3BO3
Molecular mass: 61.8
ICSC # 0991
CAS # 10043-35-3
RTECS # ED4550000
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Not combustible.
Gives off irritating or toxic fumes (or gases) in a fire.
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In case of fire in the surroundings: all extinguishing agents allowed.
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Explosion
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Exposure
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PREVENT DISPERSION OF DUST!
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•Inhalation
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Cough.
Sore throat.
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Local exhaust or breathing protection.
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Fresh air, rest.
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•Skin
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MAY BE ABSORBED!
Redness.
May be absorbed through injured skin.
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Protective gloves.
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Remove contaminated clothes.
Rinse and then wash skin with water and soap.
Refer for medical attention.
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•Eyes
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Redness.
Pain.
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Safety spectacles.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Abdominal pain.
Convulsions.
Diarrhoea.
Nausea.
Vomiting.
Skin rash.
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting.
Wash away remainder with plenty of water
(extra personal protection: P2 filter respirator for harmful particles).
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Separated from
strong bases.
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Important Data
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Physical State; Appearance:
ODOURLESS,
COLOURLESS CRYSTALS
OR WHITE POWDER.
Physical Dangers:
Chemical Dangers:
The substance decomposes
on heating above 100°C
producing water and irritant boric anhydride.
The solution in water is a weak acid.
Incompatible with alkali carbonates and hydroxides.
Occupational Exposure Limits:
TLV:
(Inhalable fraction)
2 mg/m3 as TWA, 6 mg/m3 as STEL; A4 (not classifiable as a human carcinogen); (ACGIH 2008).
MAK: IIb (not established but data is available) (DFG 2008).
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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 nuisance-causing concentration of airborne particles can, however, be reached quickly when dispersed.
Effects of Short-Term Exposure:
The substance
irritates
the eyes,
the skin and
the respiratory tract.
The substance may cause effects on the gastrointestinal tract, liver and kidneys.
Effects of Long-Term or Repeated Exposure:
Repeated or prolonged contact with skin may cause dermatitis.
Animal tests show that this substance possibly causes toxic effects upon human reproduction.
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Physical
Properties
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Melting point (decomposes): 171°C
Relative density (water = 1): 1.4
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Solubility in water, g/100 ml: 5.6
Vapour pressure, kPa at 20°C: negligible
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Environmental
Data
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N O T E S
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Borofax is a trade name.
Card has been partially updated in November 2008: see Occupational Exposure Limits.
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ADDITIONAL INFORMATION
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ICSC: 0991
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BORIC ACID
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
the CEC or the IPCS is responsible for the use which might be made of this
information. This card contains the collective views of the IPCS Peer Review Committee and may
not reflect in all cases all the detailed requirements included in national legislation
on the subject. The user should verify compliance of the cards with the relevant legislation
in the country of use.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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