Diammonium phosphate
Also known as: Diammonium hydrogen phosphate, DAP, Ammonium phosphate dibasic, Ammonium hydrogen orthophosphate, diazanium hydrogen phosphate
Diammonium phosphate (CAS 7783-28-0) is a compound in the Inorganic Chemicals category listed in the Jingsj chemical database. It has the molecular formula H9N2O4P and a molecular weight of 132.06 g/mol. Key properties include a melting point of 155 °C (dec.)(lit.), a boiling point of 158ºC at 760 mmHg and a density of 1.203 g/mL at 25 °C. It is listed by 1 supplier; request a quote for pricing. Record last updated Aug 21, 2026.
- CAS No.
- 7783-28-0
- Jingsj CID
- J-32650-6
- Molecular Formula
- H9N2O4P
- Molecular Weight
- 132.06 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 | 155 °C (dec.)(lit.) |
|---|---|
| Boiling Point | 158ºC at 760 mmHg |
| Density | 1.203 g/mL at 25 °C |
| Exact Mass | 132.029999 |
| PSA | 94.05000 |
| Refractive Index | 1.53 |
| Additional Property | 58 g/ 100mL (10 ºC) |
Activity & Biological Data
| Additional Information | [1]. Darviche F, et al. Diammonium hydrogen phosphate as a neutral and efficient catalyst for synthesis of 1, 8‐dioxo‐octahydroxanthene derivatives in aqueous media[J]. Synthetic Communications, 2007, 37(7): 1059-1066. [2]. Elder DP, et al. Pharmaceutical excipients - quality, regulatory and biopharmaceutical considerations. Eur J Pharm Sci. 2016 May 25;87:88-99. |
|---|
Customs & Trade Information
| HS Code | 2919900090 |
|---|---|
| Summary | 2919900090 other phosphoric esters and their salts, including lactophosphates; their halogenated, sulphonated, nitrated or nitrosated derivatives。supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward)。VAT:17.0%。tax rebate rate:9.0%。MFN tariff:6.5%。general tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Diammonium phosphate?
The CAS number of Diammonium phosphate is 7783-28-0.
What are the molecular formula and molecular weight of Diammonium phosphate?
Diammonium phosphate has molecular formula H9N2O4P and molecular weight 132.06 g/mol.
Which suppliers offer Diammonium phosphate?
1 supplier(s) listed; request a quote for pricing.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Diammonium phosphate (CAS 7783-28-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-32650-6 (accessed 2026-11-07).
Data for reference only; verify product details with suppliers before purchase.