Chemical and Filtration Products of Texas
CAS 7601-54-9|Na₃PO₄

Trisodium Phosphate (TSP)

Strongly alkaline phosphate salt — boiler scale control, heavy-duty industrial degreaser, and pH buffer for water treatment and food processing equipment.

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pH (1% soln)

11.5–12.0

Top Grade

Technical / FCC

DOT Status

Not regulated

Packaging

Bags / Super Sacks / Drums

Physical Properties

Molecular FormulaNa₃PO₄
Molecular Weight163.94 g/mol (anhydrous)
CAS Number7601-54-9
AppearanceWhite granular powder or crystals
Melting Point1583 °C (anhydrous)
Density2.536 g/cm³ (anhydrous)
Solubility in Water14.5 g/100 mL at 20 °C
pH (1% soln)11.5–12.0 (strongly alkaline)
Flash PointNon-flammable
HygroscopicityModerate — store in sealed containers
Hydrate FormDodecahydrate (Na₃PO₄·12H₂O) — MW 380.12
StabilityStable under normal conditions
Trisodium Phosphate (TSP)3 Na+PO₄3−POOOONa₃PO₄ | MW 163.94 g/mol | CAS 7601-54-9

Grades & Packaging

Technical GradeFCC/Food GradeAnhydrousDodecahydrate (Na₃PO₄·12H₂O)
50-lb Bags2000-lb Super Sacks55-gal Drums

Industrial Applications

Boiler Water Treatment

Controls scale and corrosion in steam boilers. Reacts with calcium and magnesium hardness to form non-adherent sludge. Maintains alkaline pH to prevent corrosion.

Industrial Cleaning & Degreasing

Heavy-duty alkaline cleaner and degreaser for metal surfaces, concrete, and industrial equipment. Saponifies fats and oils for easy removal.

Food Processing Equipment

FCC-grade TSP approved for cleaning food-contact surfaces. Effective against protein soils, fats, and mineral deposits in dairy and beverage plants.

Water Treatment & pH Control

pH buffer and corrosion inhibitor in municipal water treatment. Sequestrant for calcium and magnesium in process water systems.

Textile & Leather Processing

Scouring agent and pH regulator in textile processing. Removes natural waxes, oils, and sizing agents from raw fibers.

Concrete & Masonry Cleaning

Removes efflorescence, grease, and stains from concrete, brick, and masonry surfaces before painting or sealing.

Safety & Regulatory

NFPA Health2 — Moderate hazard (alkaline)
NFPA Flammability0 — Minimal hazard
NFPA Reactivity0 — Stable
OSHA PEL (TWA)No established PEL
ACGIH TLV (TWA)Not established
DOT Hazard ClassNot regulated
Skin/Eye HazardCorrosive to skin and eyes — use PPE
Aquatic ToxicityModerate — can cause eutrophication in waterways

Strongly Alkaline — Handle with Care

TSP solutions are strongly alkaline (pH 11.5–12). Use chemical-resistant gloves and eye protection. Avoid contact with skin and eyes. SDS available upon request.

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Technical and FCC grades in bags, super sacks, and drums across Texas and the Gulf Coast.

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