|PHYSICAL STATE; APPEARANCE: |
ODOURLESS, COLOURLESS CRYSTALS OR WHITE POWDER.
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:
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).
|ROUTES OF EXPOSURE: |
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion.
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.