Sodium Phosphate Dibasic is an inorganic phosphate salt also known as disodium phosphate or disodium hydrogen phosphate, with the chemical formula Na₂HPO₄. It is generally obtained as a white to colorless crystalline material and occurs in both anhydrous and hydrated forms. The anhydrous form is hygroscopic, while hydrates contain defined amounts of water within their crystal structure. The compound gives hydrogen phosphate ions (HPO₄²⁻) and exhibits useful buffering behavior in aqueous systems. This ability to maintain controlled pH and ionic conditions makes it an important chemical in biochemical and analytical research.
CAS No.: 7558-79-4
Synonyms: Disodium Phosphate, disodium hydrogen phosphate, Disodium orthophosphate.
| Physical Properties | |
| Chemical formula | Na2HPO4 |
| IUPAC Name | Disodium hydrogen phosphate |
| Molecular weight | 141.959 g/mol |
| Solubility | Soluble in water |
| Density | 1.52 g/cm³ |
| Appearance | White crystalline powder |
| Storage | Store at room temperature |
| Chemical Properties | |
| Color | White |
| Physical State | Solid |
| Melting Point | 240 °C |
| Ph | 8.9 – 9.2 at 50 g/l at 25 °C |
| Odor | Odorless |
| Pictograms : |  |
| Hazard Statements : | H315: Causes skin irritation. H319: Causes serious eye irritation. H335: May cause respiratory irritation. |
| Precautionary Statements: | P101: If medical advice is needed, have product container or label at hand. P102: Keep out of reach of children. P103: Read label before use. P264: Wash skin thoroughly after handling. P280: Wear protective gloves/protective clothing/eye protection/face protection. P261: Avoid breathing dust/fume/gas/mist/vapors/spray. P271: Use only outdoors or in a well-ventilated area. P321: Specific treatment (see supplemental first aid instructions on this label). P362 + P364: Take off contaminated clothing and wash it before reuse. P302 + P352: IF ON SKIN: Wash with soap and water. P332 + P313: If skin irritation occurs: Get medical advice/attention. P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing. |
Sodium Phosphate Dibasic is an inorganic phosphate salt also known as disodium phosphate or disodium hydrogen phosphate, with the chemical formula Na₂HPO₄. It is generally obtained as a white to colorless crystalline material and occurs in both anhydrous and hydrated forms. The anhydrous form is hygroscopic, while hydrates contain defined amounts of water within their crystal structure. The compound gives hydrogen phosphate ions (HPO₄²⁻) and exhibits useful buffering behavior in aqueous systems. This ability to maintain controlled pH and ionic conditions makes it an important chemical in biochemical and analytical research.
CAS No.: 7558-79-4
Synonyms: Disodium Phosphate, disodium hydrogen phosphate, Disodium orthophosphate.
| Physical Properties | |
| Chemical formula | Na2HPO4 |
| IUPAC Name | Disodium hydrogen phosphate |
| Molecular weight | 141.959 g/mol |
| Solubility | Soluble in water |
| Density | 1.52 g/cm³ |
| Appearance | White crystalline powder |
| Storage | Store at room temperature |
| Chemical Properties | |
| Color | White |
| Physical State | Solid |
| Melting Point | 240 °C |
| Ph | 8.9 – 9.2 at 50 g/l at 25 °C |
| Odor | Odorless |
| Pictograms : | |
| Hazard Statements : | H315: Causes skin irritation. H319: Causes serious eye irritation. H335: May cause respiratory irritation. |
| Precautionary Statements: | P101: If medical advice is needed, have product container or label at hand. P102: Keep out of reach of children. P103: Read label before use. P264: Wash skin thoroughly after handling. P280: Wear protective gloves/protective clothing/eye protection/face protection. P261: Avoid breathing dust/fume/gas/mist/vapors/spray. P271: Use only outdoors or in a well-ventilated area. P321: Specific treatment (see supplemental first aid instructions on this label). P362 + P364: Take off contaminated clothing and wash it before reuse. P302 + P352: IF ON SKIN: Wash with soap and water. P332 + P313: If skin irritation occurs: Get medical advice/attention. P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing. |
Sodium phosphate dibasic is a versatile chemical compound used as a buffering agent in laboratory and biochemical research. It also used as a pH stabilizer in pharmaceutical formulations, an acidity regulator and emulsifier in processed foods and a saline laxative in some medical preparations.
Sodium phosphate dibasic is also known as disodium phosphate or disodium hydrogen phosphate. The chemical formula for sodium phosphate dibasic is Na₂HPO₄.
Sodium phosphate dibasic is soluble in water and it forms a phosphate containing solution suitable for preparing laboratory buffer systems.
Sodium phosphate dibasic and monobasic sodium phosphate are both inorganic phosphate salts. Monobasic sodium phosphate contains one sodium ion while dibasic sodium phosphate contains two. They give distinct pH levels in water and are used together to prepare phosphate buffer solutions.
