September 2010
NIOSH Publication Number 2010-168c

Silicon carbide

Synonyms & Trade Names
Carbon silicide, Carborundum®, Silicon monocarbide
CAS No.
409-21-2
RTECS No.
VW0450000
DOT ID & Guide
Formula
SiC
Conversion
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
: TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp)
OSHA PEL
†: TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp)
Measurement Methods

NIOSH 0600
Physical Description
Yellow to green to bluish-black, iridescent crystals.
MW:
40.1
BP:
Sublimes		 MLT: 4892°F (Sublimes)
Sol:
Insoluble
VP:
0 mmHg (approx)
IP:
9.30 eV
Sp.Gr:
3.23
Fl.P:
NA
UEL:
NA
LEL:
NA
Noncombustible Solid
Incompatibilities & Reactivities
None reported [Note: Sublimes with decomposition at 4892°F.]
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, upper respiratory system; cough
Target Organs
Eyes, skin, respiratory system
Personal Protection/Sanitation
(See protection codes)
Skin: No recommendation
Eyes: No recommendation
Wash skin: No recommendation
Remove: No recommendation
Change: No recommendation
First Aid
(See procedures)
Eye: Irrigate immediately

Breathing: Fresh air
Swallow: Medical attention immediately
Respirator Recommendations

Not available.

Important additional information about respirator selection

See also: INTRODUCTION   See ICSC CARD: 1061