Disodium hydrogen phosphate
Also known as: Sodium phosphate dibasic, Disodium hydrogen orthophosphate, Disodium hydrogenphosphate, Disodium monohydrogen phosphate, DSP, Sodium hydrogen phosphate
Disodium hydrogen phosphate (CAS 7558-79-4) is a compound in the Inorganic Chemicals category listed in the Jingsj chemical database. It has the molecular formula HNa2O4P and a molecular weight of 141.96 g/mol. Key properties include a melting point of 243-245 °C, a boiling point of 158ºC at 760 mmHg and a density of 1.064 g/mL at 20 °C. It is listed by 1 supplier; request a quote for pricing. Record last updated Aug 21, 2026.
- CAS No.
- 7558-79-4
- Jingsj CID
- J-50187-1
- Molecular Formula
- HNa2O4P
- Molecular Weight
- 141.96 g/mol
- Category
- Inorganic Chemicals
- Last updated
- 8/21/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
Made to Order | 99.9% 500g | - | - | CN China MOQ 500g | |
Made to Order | 99.9% 1kg | - | - | CN China MOQ 1kg | |
Made to Order | 99.9% 25kg | - | - | CN China MOQ 25kg |
Physicochemical Properties
| Melting Point | 243-245 °C |
|---|---|
| Boiling Point | 158ºC at 760 mmHg |
| Density | 1.064 g/mL at 20 °C |
| Exact Mass | 141.940781 |
| PSA | 93.23000 |
| Additional Property | 4.9 (vs air) |
| Additional Property | >=10 g/100 mL at 20 ºC |
Activity & Biological Data
| Additional Information | [1]. Baldus M, et al. Structure investigation on anhydrous disodium hydrogen phosphate using solid-state NMR and X-ray techniques[J]. Journal of the American Chemical Society, 1995, 117(18): 5141-5147. [2]. Elder DP, et al. Pharmaceutical excipients - quality, regulatory and biopharmaceutical considerations. Eur J Pharm Sci. 2016 May 25;87:88-99. |
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Customs & Trade Information
| HS Code | 2835220000 |
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Frequently Asked Questions
What is the CAS number of Disodium hydrogen phosphate?
The CAS number of Disodium hydrogen phosphate is 7558-79-4.
What are the molecular formula and molecular weight of Disodium hydrogen phosphate?
Disodium hydrogen phosphate has molecular formula HNa2O4P and molecular weight 141.96 g/mol.
Which suppliers offer Disodium hydrogen 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. "Disodium hydrogen phosphate (CAS 7558-79-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-50187-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.