DISODIUM PHOSPHATE- ▸ Buffering agent: Controls pH in food, cleaning, and industrial baths.
- ▸ Emulsifier: Emulsifying salt in processed-food systems.
- ▸ Scale inhibitor: Controls scale in boiler-water treatment.
- ▸ Metal treatment: Reagent in phosphatizing and electroplating.
- ▸ Sequestrant: Binds polyvalent metal ions in process water.
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →Disodium Phosphate (CAS 7558-79-4) is the disodium salt of phosphoric acid (disodium hydrogen phosphate). It is used as a buffering and emulsifying agent in food and industrial systems, as a scale inhibitor in boiler-water treatment, and as a reagent in metal phosphatizing, electroplating, and textile and leather processing.
Frequently Asked Questions
What is disodium phosphate used for?
Disodium phosphate (DSP, CAS 7558-79-4) is the disodium salt of phosphoric acid, used as a buffering and emulsifying agent in food and industrial systems, a scale inhibitor in boiler-water treatment, and a reagent in metal phosphatizing, electroplating, and textile and leather processing. It also acts as a sequestrant that binds polyvalent metal ions in process water. RawSource supplies it in bulk to industrial and food-grade accounts.
Is disodium phosphate the same as sodium phosphate or dipotassium phosphate?
No. "Sodium phosphate" is a family that includes monosodium, disodium, and trisodium phosphates, each with a distinct CAS and pH behavior; DSP is specifically disodium hydrogen phosphate (CAS 7558-79-4). Dipotassium phosphate is the potassium analog, a different salt entirely. Specify the exact salt and grade when ordering.
What grades of disodium phosphate are available?
DSP is commercially supplied in technical/industrial and food grades, and as anhydrous or hydrated forms (e.g., dihydrate, dodecahydrate) that differ in assay basis. Specify the required grade and hydrate state at quote so the CoA matches your specification. RawSource provides CoA and SDS with each shipment.
What is the CAS number and HS code for disodium phosphate?
The CAS number is 7558-79-4 (formula HNa2O4P for the anhydrous salt) and it classifies under HS 2835.22 (phosphates of mono- or disodium). These identifiers apply to import documentation and CoA verification.
What is the cost of bulk disodium phosphate?
Pricing is quoted by order based on grade, hydrate form, volume, packaging (bags, drums, totes), and freight. Send RawSource your target quantity, grade, and destination for a landed quote and lead time. We quote rather than list because cost tracks phosphate markets and scale.