Disodium dihydrogen pyrophosphate
Also known as: Sodium acid pyrophosphate, SAPP, Disodium diphosphate, Disodium dihydrogen diphosphate, Diphosphoric acid, disodium salt
Disodium dihydrogen pyrophosphate (CAS 7758-16-9) is a compound in the Inorganic Chemicals category listed in the Jingsj chemical database. It has the molecular formula H2Na2O7P2 and a molecular weight of 221.93900 g/mol. Key properties include a melting point of 988ºC and a density of 2.311 g/cm3 (25ºC). It is classified under GHS with signal word Warning and hazard statements H319 — Causes serious eye irritation. It is listed by 1 supplier; request a quote for pricing. Record last updated Aug 21, 2026.
- CAS No.
- 7758-16-9
- Jingsj CID
- J-38535-3
- Molecular Formula
- H2Na2O7P2
- Molecular Weight
- 221.93900 g/mol
- Category
- Inorganic Chemicals
- Last updated
- 8/21/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
Made to Order | - | - | CN China |
Physicochemical Properties
| Melting Point | 988ºC |
|---|---|
| Density | 2.311 g/cm3 (25ºC) |
| Exact Mass | 221.90700 |
| PSA | 149.57000 |
| LogP | 0.06480 |
| Additional Property | H2O: 0.1 M at 20 °C, clear, colorless |
GHS Safety & Compliance
- H319 — Causes serious eye irritation
Activity & Biological Data
| Additional Information | [1]. Yasmina M Abd-Elhakim, et al. Effects of the food additives sodium acid pyrophosphate, sodium acetate, and citric acid on hemato-immunological pathological biomarkers in rats: Relation to PPAR-α, PPAR-γ and tnfα signaling pathway. Environ Toxicol Pharmacol. 2018 Sep;62:98-106. |
|---|
Customs & Trade Information
| HS Code | 2835399000 |
|---|
Frequently Asked Questions
What is the CAS number of Disodium dihydrogen pyrophosphate?
The CAS number of Disodium dihydrogen pyrophosphate is 7758-16-9.
What are the molecular formula and molecular weight of Disodium dihydrogen pyrophosphate?
Disodium dihydrogen pyrophosphate has molecular formula H2Na2O7P2 and molecular weight 221.93900 g/mol.
Which suppliers offer Disodium dihydrogen pyrophosphate?
1 supplier(s) listed; request a quote for pricing.
Is Disodium dihydrogen pyrophosphate hazardous?
Disodium dihydrogen pyrophosphate has GHS signal word Warning and hazard statements H319 — Causes serious eye irritation.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Disodium dihydrogen pyrophosphate (CAS 7758-16-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-38535-3 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.