September 2010
NIOSH Publication Number 2010-168c

Tetrasodium pyrophosphate

Synonyms & Trade Names
Pyrophosphate, Sodium pyrophosphate, Tetrasodium diphosphate, Tetrasodium pyrophosphate (anhydrous), TSPP
CAS No.
7722-88-5
RTECS No.
UX7350000
DOT ID & Guide
Formula
Na4P2O7
Conversion
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
: TWA 5 mg/m3
OSHA PEL
†: none
Measurement Methods

NIOSH 0500
Physical Description
Odorless, white powder or granules. [Note: The decahydrate (Na4P2O7 • 10H2O) is in the form of colorless, transparent crystals.]
MW:
265.9
BP:
Decomposes		 MLT: 1810°F Sol(77°F): 7%
VP:
0 mmHg (approx)
IP:
NA
Sp.Gr:
2.45
Fl.P:
NA
UEL:
NA
LEL:
NA
Noncombustible Solid
Incompatibilities & Reactivities
Strong acids
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, nose, throat; dermatitis
Target Organs
Eyes, skin, respiratory system
Personal Protection/Sanitation
(See protection codes)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: Daily
Provide: Eyewash (solution)
First Aid
(See procedures)
Eye: Irrigate immediately
Skin: Water wash promptly
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations

Not available.

Important additional information about respirator selection

See also: INTRODUCTION   See ICSC CARD: 1140