Molekula
Disodium dihydrogen pyrophosphate
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Disodium dihydrogen pyrophosphate is a water-soluble inorganic salt used as a pH buffer, chelating agent, and stabilizer in food, pharmaceuticals, and industrial applications. Its main applications are in baking powders and as a food acidulant, as well as in electroplating, metal cleaning and phosphatizing, and drilling muds. It appears as a white crystalline powder. CAS: 7758-16-9, Molecular formula: Na2H2P2O7, Molecular weight: 221.94 g/mol, Storage: Ambient, Signal word: Warning. Molekula supplies Disodium dihydrogen pyrophosphate from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White powder |
| Heavy metals | ≤0.0015% |
| pH | 3.7 - 4.4 |
| Loss on Drying | ≤0.5% |
| Assay | ≥95.0% |
| P2O5 | 63 - 64% |
| Insolubles | ≤0.6% |
| Cadmium (Cd) | ≤1ppm |
| Lead (Pb) | ≤2ppm |
| Mercury (Hg) | ≤1ppm |
| Arsenic (As) | ≤3ppm |
| Fluoride (F-) | ≤10ppm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | White crystalline powder |
| Water Solubility | Soluble in water |
Source: PubChem CID 24451 (HSDB, EU Food Improvement Agents)
Identification
| Property | Value |
|---|---|
| SKU | 19460029 |
| CAS Number | 7758-16-9 |
| IUPAC Name | disodium;[hydroxy(oxido)phosphoryl] hydrogen phosphate |
| EC Number | 231-835-0 |
| Molecular Formula | Na2H2P2O7 |
| Molecular Weight | 221.94 |
| Exact Mass | 221.9071 |
| SMILES | OP(=O)([O-])OP(=O)(O)[O-].[Na+].[Na+] |
| InChIKey | GYQBBRRVRKFJRG-UHFFFAOYSA-L |
| InChI | InChI=1S/2Na.H4O7P2/c;;1-8(2,3)7-9(4,5)6/h;;(H2,1,2,3)(H2,4,5,6)/q2*+1;/p-2 |
| PubChem CID | 24451 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 28353950 |
| Tariff Code | 2835390000 |
Safety & GHS
-
Health Hazard
GHS07
Hazard statements
- H319 Causes serious eye irritation
Precautionary statements
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Dinatriumpyrophosphat
- Diphosphoric acid, disodium salt
- Diphosphoric acid, sodium salt (1:2)
- Disodium acid pyrophosphate
- Disodium dihydrogen diphosphate
- DISODIUM PYROPHOSPHATE
- Pyrophosphoric acid, disodium salt
- SAPP
- Sodium acid pyrophosphate
- Sodium pyrophosphate (Na2H2P2O7)
Frequently asked questions
What is Disodium dihydrogen pyrophosphate used for?
It is commonly used as a water softener, pH buffer, and sequestrant in detergents and industrial cleaning formulations.
What is the chemical formula and molecular weight?
The formula is Na2H2P2O7 with a molecular weight of 221.94 g/mol.
How should Disodium dihydrogen pyrophosphate be stored?
It should be stored at ambient temperature in a dry, well-ventilated area.
What grade is available?
We offer technical grade for industrial applications.
Can Molekula supply it in bulk?
Yes, we can supply Disodium dihydrogen pyrophosphate in bulk quantities upon request.
What documentation comes with the order?
Each order includes a Certificate of Analysis and Safety Data Sheet (SDS) with the shipment.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.