Disodium Phosphate Anhydrous 98% (E339)

Description

Disodium Phosphate Anhydrous 98% (E339)

Disodium Phosphate Anhydrous 98% (E339) (CAS 7558-79-4, molecular formula Na2HPO4) is a food-grade ingredient supplied to a published specification for food, beverage and nutrition manufacture, with traceability from batch through to certificate. China Chemicals supplies it at 98% min in pack sizes from 1 kg through to 1000 kg Bulk Bag, so laboratory trial quantities and full production volumes can be sourced from the same specification.

It is also traded as E339, DSP, Sodium Hydrogen Phosphate, Disodium Orthophosphate. Every consignment ships with a batch-specific Certificate of Analysis and the current Safety Data Sheet, and material is stored and picked under stock rotation so you receive product well inside its shelf life.

Typical applications

• Emulsifying salt in processed cheese and dairy
• Buffer and pH stabiliser in evaporated milk
• Anticaking and free-flow agent in powdered products
• Boiler water treatment and scale control
• Detergent builder and water conditioner

Technical specification

Chemical name	Disodium Phosphate Anhydrous 98% (E339)
Synonyms	E339, DSP, Sodium Hydrogen Phosphate, Disodium Orthophosphate
CAS number	7558-79-4
Molecular formula	Na2HPO4
Appearance	White free-flowing powder
Assay Na2HPO4	98.0% min
pH (1% solution)	8.9 – 9.2
Loss on ignition	5.0% max
Water insolubles	0.2% max
Fluoride	10 ppm max
Standard	FCC / E339 compliant

Values above are typical and are confirmed on the Certificate of Analysis issued against each batch. Tighter specifications can be quoted where a process requires them.

Packaging and supply

Available in 1 kg, 5 kg, 25 kg Bag, 1000 kg Bulk Bag. Bulk, road tanker and export drum quantities are quoted on request, including FOB and CIF terms for international shipment. Pricing shown is per pack in USD, exclusive of freight and any applicable duties.

Handling and safety

Transport classification: Not regulated · Causes eye irritation. Store in the original closed container in a cool, well-ventilated area away from incompatible materials, and handle using appropriate personal protective equipment. Read the Safety Data Sheet in full before use — it is issued with every order and is available on request before purchase.

Supply to industry only. Products are sold for legitimate industrial, laboratory and manufacturing use. We may request end-use details and business registration before releasing an order.

What Is Disodium Phosphate Anhydrous?

Disodium phosphate anhydrous is the sodium salt of phosphoric acid (Na2HPO4) in its water-free form, as distinct from the dihydrate, heptahydrate and dodecahydrate forms also sold commercially. At 98% purity it is approved as food additive E339 under the FDA, EFSA and JECFA frameworks, where its function classes cover acidity regulator, emulsifier, texturizer and thickener. It is a white, odourless, water-soluble powder.

How It Works in Different Foods

In processed cheese, disodium phosphate anhydrous acts as an emulsifying salt: it helps distribute fat evenly through the cheese as it is melted and reformed, which keeps processed cheese smooth instead of greasy or split. In evaporated milk it buffers pH during sterilization, which helps stop the milk proteins coagulating under heat. In whipped toppings it supports foam stability, and in pasta manufacturing it has been shown to shorten cooking time. In beverages it works as both a buffer and a chelating agent.

Applications Summary

Typical uses for this disodium phosphate anhydrous include processed cheese and cheese spreads, evaporated and condensed milk, whipped and dessert toppings, instant pudding, beverages and pasta. It is often used alongside other buffering salts such as Trisodium Citrate, and in bakery systems that also use preservatives such as Calcium Propionate.

Handling & Storage

Disodium phosphate anhydrous is a recognised food additive with an established safety record across major regulatory reviews. It is hygroscopic, so store it in a sealed container in a dry location to prevent caking and moisture uptake. Standard food-grade handling practices apply.

Frequently Asked Questions

What does disodium phosphate anhydrous do in processed cheese?
It acts as an emulsifying salt, helping distribute fat evenly through the cheese and preventing it separating during melting and reforming. This is why processed cheese stays smooth rather than greasy or split.

Why is disodium phosphate anhydrous used in evaporated milk?
It buffers and adjusts pH during sterilization, which helps prevent the milk proteins from coagulating (curdling) under heat.

Is disodium phosphate anhydrous (E339) safe?
It is an approved food additive under the FDA, EFSA and JECFA frameworks, with function classes covering acidity regulator, emulsifier, texturizer and thickener, and an established safety record across those reviews.

Does disodium phosphate anhydrous really shorten pasta cooking time?
Yes. Its addition has been documented to shorten cooking time in pasta manufacturing.

Can this product meet kosher requirements?
Disodium phosphate E339 can be certified kosher. Confirm your specific certification requirements with us before ordering.

What packaging and order quantities are available?
We supply disodium phosphate anhydrous from trial quantities through to full bulk orders. Contact us with your required volume for current pricing and lead time.

For further independent reference, see the Wikipedia entry on disodium phosphate, and browse our full Food Additives range.