Sodium Phosphate, Dibasic
Products Description of Sodium Phosphate, Dibasic CAS#7558-79-4
Sodium phosphate dibasic is highly hygroscopic and soluble in water. It is commonly used with sodium phosphate monobasic to prepare biological buffers, and is often applied in biological assay buffers. Sodium is essential for nerve and muscle function, so sodium phosphate dibasic can also serve as a dietary supplement and nutrient. Additionally, when paired with trisodium phosphate, it is used in food processing and water treatment.
Parameters
Melting point | 243-245 °C |
density | 1.064 g/mL at 20 °C |
bulk density | 880kg/m3 |
vapor density | 4.9 (vs air) |
vapor pressure | 0Pa at 20℃ |
FEMA | 2398 | DISODIUM PHOSPHATE |
storage temp. | Store at +5°C to +30°C. |
solubility | H2O: 0.5 M at 20 °C, clear, colorless |
form | |
color | White |
Odor | odorless |
PH | 8.9-9.2 (25℃, 50g/L in water) |
pka | (1) 2.15, (2) 6.82, (3) 12.38 (at 25℃) |
biological source | synthetic |
Water Solubility | >=10 g/100 mL at 20 ºC |
λmax | λ: 260 nm Amax: 0.019 |
Sensitive | Hygroscopic |
Merck | 14,8659 |
Stability: | Stable. Incompatible with strong acids. Hygroscopic. |
InChIKey | BNIILDVGGAEEIG-UHFFFAOYSA-L |
LogP | -2.15 |
CAS DataBase Reference | 7558-79-4(CAS DataBase Reference) |
EPA Substance Registry System | Disodium phosphate (7558-79-4) |
Absorption | ≤0.01 at 260nm |
Safety Information
Hazard Codes | Xi |
Risk Statements | 36/37/38 |
Safety Statements | 26-36-24/25 |
RIDADR | UN 3077 9 / PGIII |
WGK Germany | 3 |
RTECS | WC4500000 |
F | 3 |
TSCA | Yes |
HS Code | 28352200 |
Hazardous Substances Data | 7558-79-4(Hazardous Substances Data) |
Toxicity | LD50 orally in Rabbit: > 2000 mg/kg |
Product Application of Sodium Phosphate, Dibasic CAS#7558-79-4
Sodium phosphate dibasic has a wide range of applications across laboratories, industry, food, agriculture, and even medicine. In labs and chemical analysis, it works as a reagent and buffer. Industrially, it’s used to make ceramics, detergents, and enamels; acts as a mordant for dyeing; fireproofs paper and wood; adds weight to silk and aids in silk printing; treats boiler water; and serves as a soldering aid for enamels. In food and agriculture, it functions as a sequestrant, dietary supplement, and fertilizer component. It also has therapeutic use as a cathartic..
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