Disodium hydrogen phosphate dihydrate

CAS Number
10028-24-7
EC Number
600-053-5

What is Disodium hydrogen phosphate dihydrate?

Disodium hydrogen phosphate dihydrate (CAS 10028-24-7), also sold as sodium phosphate dibasic dihydrate, is an inorganic phosphate salt used as a pH buffer and sequestrant. Approved as E339.

Where is Disodium hydrogen phosphate dihydrate used?

  • Food manufacturing: emulsifying salt and buffering agent
  • Processed cheese, dairy blends and cured meat: prevents protein separation and texture breakdown
  • Pharmaceuticals: buffered saline solutions, injectable formulations and tablet excipient blends
  • Water treatment: inhibits scale and corrosion by sequestering calcium and magnesium ions
  • Animal feed: supplies bioavailable phosphorus and supports mineral balance
  • In food applications it controls acidity and stabilizes formulations.

Commercial specifications

  • Packaging from 25 kg bags to bulk quantities

Other Names (Synonyms)

Sodium phosphate dibasic dihydrate|Disodium phosphate dihydrate|Phosphoric acid, disodium salt, dihydrate|Disodium orthophosphate dihydrate|Disodium monohydrogen phosphate dihydrate|Sodium phosphate (Na2HPO4) dihydrate|Disodium Phosphate DSP|E949

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What are the physical properties of Disodium hydrogen phosphate dihydrate?

Melting Point 92,5°C
Density 1.064 g/mL at 20 °C
Appearance solid
Color White
Odor Odorless
Form powder
Water Solubility Soluble in water
pH 8.9-9.2 (25℃, 0.5M in H2O)

How is Disodium hydrogen phosphate dihydrate classified and handled safely? Learn More

Warning
GHS07· Irritant

Hazard Statements

H319 Causes serious eye irritation

Precautionary Statements

P280 Wear protective gloves/protective clothing/eye protection/face protection.
P264+P265 Wash … thoroughly after handling.
P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Which trade and regulatory codes apply to Disodium hydrogen phosphate dihydrate?

HS Code 28352200
UN Number 3077
ADR Class 9
Packing Group III
Storage Class 13 - Non Combustible Solids
WGK (Germany) 3
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