7558-80-7/Monosodium phosphate anhydrous

Categories and Type

Sodium dihydrogen phosphate is classified as an inorganic salt and belongs to the group of phosphates.

Uses and Mechanism of Action

Sodium dihydrogen phosphate is a synthetic compound commonly used in various industrial applications, including tanning, boiler water treatment, compound fertilizer production, metal detergent formulation, pH buffering, and pigment precipitation.

In the construction industry, it is used as an additive to magnesium phosphate cement (MPC) to modify the crystal structure of hydration products, thereby improving mechanical properties such as flexural and compressive strength.^[1]
In food processing, it is utilized in combination with ascorbic acid (Vc) to inhibit browning in yellow alkaline noodles by reducing the activity of polyphenol oxidase (PPO) and quinone content.^[2]
In the mining industry, it serves as an activator for dolomite in reverse flotation separation processes, enhancing the selective flotation of dolomite from magnesite ores.

Regulatory Status

Sodium dihydrogen phosphate is generally recognized as safe (GRAS) by the FDA and is widely used in food processing.

Production Methods

Sodium dihydrogen phosphate is produced through chemical synthesis methods. It's solubility in water and stability make it suitable for various industrial applications.

Analysis Method

The effects of sodium dihydrogen phosphate on materials such as magnesium phosphate cement, yellow alkaline noodles, and mineral ores are analyzed using techniques such as X-ray diffraction (XRD), thermogravimetric analysis (TG), Fourier transform infrared spectroscopy (FTIR), pore structure determination, micromorphology analysis, energy spectrometry (EDS), X-ray photoelectron spectroscopy (XPS), zeta potential measurements, and density functional theory (DFT) calculations. These methods help elucidate the mechanisms underlying the compound's effects and interactions in different systems.

General Description

Sodium dihydrogen orthophosphate, also known as monosodium phosphate, is a chemical compound with the formula NaH2PO4. It is a white, crystalline powder that is highly soluble in water. Sodium dihydrogen orthophosphate is commonly used as a food additive, a buffer in solutions, and a component in many cleaning and industrial products. In its food grade form, it is often added to foods as an emulsifier and to adjust pH levels. In addition, it is used in the production of fertilizers and as a pH regulator in various industrial processes. Sodium dihydrogen orthophosphate is considered safe for consumption in small quantities, but exposure to large amounts can be harmful and can cause irritation to the skin, eyes, and respiratory system.