|PHYSICAL STATE; APPEARANCE: |
ODOURLESS, HYGROSCOPIC, WHITE POWDER OR GLASS-LIKE PLATE. TURNS OPAQUE ON EXPOSURE TO AIR.
The substance decomposes on heating or on burning producing toxic fumes including sodium oxide. Reacts with strong oxidants.
OCCUPATIONAL EXPOSURE LIMITS:
TLV: (borates) 2 mg/m3 as TWA, 6 mg/m3 as STEL; A4 (not classifiable as a human carcinogen); (ACGIH 2008).
OSHA PEL†: none
NIOSH REL: TWA 1 mg/m3
NIOSH IDLH: N.D. See: IDLH INDEX
|ROUTES OF EXPOSURE: |
The substance can be absorbed into the body by inhalation of its aerosol, by ingestion and through damaged skin.
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed, especially if powdered.
EFFECTS OF SHORT-TERM EXPOSURE:
The substance irritates the eyes, the skin and the respiratory tract. The substance may cause effects on the central nervous system, kidneys and gastrointestinal tract by ingestion at high dose or through damaged skin.
EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact with skin may cause dermatitis. The substance may have effects on the respiratory tract.