Sodium dihydrogen phosphate

Colorless monoclinic crystal or white powder. The relative density is 1.52. Dissolved in water, the aqueous solution is weakly alkaline, the pH of the 1% aqueous solution is 8.8-9.2; insoluble in alcohol. Melt at 35.1 ° C and lose 5 crystal water. It is easy to weather in the air. It is placed in the air at room temperature and loses about 5 crystal waters to form heptahydrate. When heated to 100 °C, it loses all crystal water to form an anhydrate. At 250 °C, it turns into sodium pyrophosphate. Carefully dry at 34 ° C or less to obtain a white powder of sodium dihydrogen phosphate dihydrate.

Sodium dihydrogen phosphate

1. Product Name: Sodium Dihydrogen Phosphate

2. Alias: disodium phosphate dihydrate; sodium dihydrogen phosphate

3. Molecular formula: Na2HPO4·12H2O

4. Molecular weight: 358.14

5. CAS number: 10039-32-4

6, use:

A mordant for the cleaning and dyeing of detergents, printing plates. Used as a stabilizer for hydrogen peroxide drift in the printing and dyeing industry. It is a raw material for the manufacture of sodium cocarbonate and other phosphates, and is also a culture agent for MSG, erythromycin, penicillin, streptomycin and sewage biochemical treatment products. Also used in electroplating, food processing, as a quality improver.

7. Physical and chemical properties:

Colorless monoclinic crystal or white powder. The relative density is 1.52. Dissolved in water, the aqueous solution is weakly alkaline, the pH of the 1% aqueous solution is 8.8-9.2; insoluble in alcohol. Melt at 35.1 ° C and lose 5 crystal water. It is easy to weather in the air. It is placed in the air at room temperature and loses about 5 crystal waters to form heptahydrate. When heated to 100 °C, it loses all crystal water to form an anhydrate. At 250 °C, it turns into sodium pyrophosphate. Carefully dry at 34 ° C or less to obtain a white powder of sodium dihydrogen phosphate dihydrate.

8, packaging, storage and transportation:

Packed in woven bags lined with polyethylene plastic bags, each bag has a net weight of 25kg/50kg. It should be stored in a cool, ventilated, dry warehouse. The package should be sealed and protected from moisture. Protect from rain and sun when transporting. Handle with care when handling, to prevent damage to the packaging. In case of fire, use water, sand and carbon dioxide fire extinguishers to save.

Quality standard: HB/T2965-200 (industrial grade) GB1909-87 (food grade).