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Chemical Sampling Information (CSI)
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General Description

Synonyms: Tetrasodium Salt Pyrophosphoric Acid; TSPP; Victor TSPP; Anhydrous Tetrasodium Pyrophosphate; Phosphotex; Pyrophosphate; Sodium Pyrophosphate; Tetranatriumpyrophosphat; TSPP

OSHA IMIS Code Number: T102

Chemical Abstracts Service (CAS) Registry Number: 7722-88-5

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: UX7350000; 73354

NIOSH Pocket Guide to Chemical Hazards, Tetrasodium Pyrophosphate: chemical description, physical properties, potentially hazardous incompatibilities, and more

Chemical Description and Physical Properties:
colorless, transparent crystals or white powder
molecular weight: 265.90
Exposure Limits

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 5 mg/m3 TWA (Anhydride and Decahydrate)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 5 mg/m3 TWA


Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):
  • sampling media: Low Ash Polyvinyl Chloride (LAPVC) filter 5 microns
    maximum volume: 960 Liters
    maximum flow rate: 2.0 L/min
    current analytical method: Gravimetric
    method reference: 11, 12
    sampling and analytical error: 0.10
    method classification: Fully Validated
    alternate analytical method: Atomic Absorption Spectrometry; AAS
    method reference: 2 (OSHA ID-121)
    method classification: Fully Validated
    alternate analytical method: Ion Chromatography; IC
    method reference: 2 (OSHA ID-111)
    method classification: Partially Validated
    note: The two most important crystalline sodium polyphosphates are the pyrophosphate (n2) and the tripolyphosphate, also called the triphosphate (n3) (NaN+2Pn03n+1). Submit as a separate sample. An analysis is performed for total Na and PO4-3 and reported as the compound.
Wipe Sampling Method:
  • sampling media: Whatman smear tab; Solvent: Deionized water
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Page last updated: 01/15/1993