NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

Sodium fluoride (as F)

CAS
7681-49-4

NaF

RTECS
WB0350000
Synonyms & Trade Names

Floridine, Sodium monofluoride
DOT ID & Guide
1690 / 154

Exposure
Limits

NIOSH REL*: TWA 2.5 mg/m3 [*Note: The REL also applies to other inorganic, solid fluorides (as F).]
OSHA PEL*: TWA 2.5 mg/m3 [*Note: The PEL also applies to other inorganic, solid fluorides (as F).]
IDLH
250 mg/m3 (as F) See: fluoride
Conversion
Physical Description
Odorless, white powder or colorless crystals. [Note: Pesticide grade is often dyed blue.]
MW: 42.0
BP: 3099°F
MLT: 1819°F
Sol: 4%
VP: 0 mmHg (approx)
IP: NA

Sp.Gr: 2.78
Fl.P: NA
UEL: NA
LEL: NA

Noncombustible Solid
Incompatibilities & Reactivities

Strong oxidizers
Measurement Methods
NIOSH 7902, 7906; OSHA ID110
See: NMAM or OSHA Methods
Personal Protection & Sanitation
(See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: Daily

First Aid
(See procedures)
Eye: Irrigate immediately
Skin: Soap wash promptly
Breathing: Fresh air
Swallow: Medical attention immediately
Respirator Recommendations
NIOSH/OSHA
Up to 12.5 mg/m3:
(APF = 5) Any quarter-mask respirator. Click here for information on selection of N, R, or P filters.
Up to 25 mg/m3:
(APF = 10) Any particulate respirator equipped with an N95, R95, or P95 filter (including N95, R95, and P95 filtering facepieces) except quarter-mask respirators. The following filters may also be used: N99, R99, P99, N100, R100, P100. Click here for information on selection of N, R, or P filters.*
(APF = 10) Any supplied-air respirator*
Up to 62.5 mg/m3:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode*
(APF = 25) Any powered air-purifying respirator with a high-efficiency particulate filter.*+
Up to 125 mg/m3:
(APF = 50) Any air-purifying, full-facepiece respirator with an N100, R100, or P100 filter. Click here for information on selection of N, R, or P filters.+
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece
Up to 250 mg/m3:
(APF = 2000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
Emergency or planned entry into unknown concentrations or IDLH conditions:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure- demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus
Escape:
(APF = 50) Any air-purifying, full-facepiece respirator with an N100, R100, or P100 filter. Click here for information on selection of N, R, or P filters.+/Any appropriate escape-type, self-contained breathing apparatus
+Note: May need acid gas sorbent
Important additional information about respirator selection
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
Irritation eyes, respiratory system; nausea, abdominal pain, diarrhea; salivation, thirst, sweating; stiff spine; dermatitis; calcification of ligaments of ribs, pelvis
Target Organs
Eyes, skin, respiratory system, central nervous system, skeleton, kidneys
See also: INTRODUCTION