Disodium dihydrogen pyrophosphate, with the formula Na2H2P2O7, is an inorganic compound. The following is a brief description of its nature, use, manufacturing and safety information:
Nature:
1. Appearance: Disodium dihydrogen pyrophosphate is white crystalline powder or particle.
2. Stability: It is relatively stable at room temperature and will decompose at high temperatures.
3. Solubility: Disodium dihydrogen pyrophosphate is soluble in water, and the solubility increases with the increase of temperature.
Purpose:
1. Food additives: Disodium dihydrogen pyrophosphate can be used as a food additive to adjust pH, stabilize pH, and play the role of preservation and protection of food quality.
2. Metal surface treatment: It can be used as a metal surface treatment agent to remove oxides and rusts, thereby improving the adhesion of the metal surface.
3. Chemical analysis: Disodium dihydrogen pyrophosphate can be used as a buffer and reagent in chemical analysis.
Preparation:
Disodium dihydrogen pyrophosphate can be prepared by the reaction of disodium monohydrogen pyrophosphate (NaH2PO4) and Na2CO3. The specific steps are to mix NaH2PO4 and Na2CO3 according to a certain molar ratio, and react under appropriate reaction conditions (temperature, pressure), and finally obtain disodium dihydrogen pyrophosphate.
Safety information:
1. Disodium dihydrogen pyrophosphate is generally considered safe for humans, but ingestion and inhalation should still be avoided.
2. When using, wear appropriate protective equipment, such as gloves, protective glasses and masks to protect the skin and eyes.
3. In case of accidental contact with skin or eyes, rinse immediately with plenty of water.
4. Storage should be sealed to avoid mixing with other chemicals.
It should be noted that the above information is for reference only, please follow the relevant safety operation guidelines and regulations when using and handling.
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