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Sodium Phosphate Monobasic is the raw material for the manufacture of sodium hexametaphosphate and sodium pyrophosphate. It is mainly used in tanning, boiler water treatment, as a quality improver and baking powder, and as a buffer and baking powder in the food industry and fermentation industry. Raw materials, also used as feed additives, detergents and dye auxiliaries.Sodium dihydrogen phosphate can be prepared by the action of phosphoric acid and sodium carbonate under the control of pH value.
Basic Information
English name | Sodium Phosphate Monobasic | ||
English alias | Sodium phosphate monobasic dihydrate，Acid sodium phosphate，Monosodium orthophosphate，Primary sodium phosphate，Sodium dihydrogen phosphate，Sodium biphosphate，Monosodium phosphate，MSP | ||
CAS number | 7558-80-7 | Chemical formula and relative molecular mass | NaH2PO4： 119 |
Store
Store tightly sealed.
Use
buffer.Water softener.Manufacture of sodium hexametaphosphate and sodium pyrophosphate.Determination of magnesium.Modified White medium was prepared in haploid breeding.
Quality inspection information
Arsenic (As) | % ≤0.0002 |
Ammonium (NH4) | % ≤0.002 |
Ammonia precipitate | % ≤0.01 |
pH（50g/L，25℃） | 4.2～4.6 |
Water insoluble matter | % ≤0.01 |
Heavy metals (as Pb) | % ≤0.001 |
Potassium (K) | % ≤0.02 |
Iron (Fe) | % ≤0.001 |
Chloride (Cl) | % ≤0.005 |
Sulfate (SO4) | % ≤0.005 |
Nitrate (NO3) | % ≤0.001 |
Clarity Test | qualified |
Content (NaH2PO42H2O) | % ≥99.0 |
Performance characteristics
Density 1.949/cm.Melting point 60 ℃.There are three types of anhydrous, monohydrate and dihydrate.Anhydrous is white crystalline powder, slightly hygroscopic and easily soluble in water.Anhydrous is a colorless orthorhombic crystal, easily soluble in water, the aqueous solution is acidic (PH=4.5), insoluble in alcohol, slightly soluble in chloroform.Dihydrate is also very soluble in water, easy to agglomerate in humid air, dehydrated into anhydrous at 100 ℃, formed sodium pyrophosphate at 190-210 ℃, and decomposed into sodium metaphosphate at 280-300 ℃.Aqueous solutions are acidic.At present, the main product is dihydrate.At a certain pH value, it is prepared by the reaction of sodium carbonate and phosphoric acid or by the reaction of disodium hydrogen phosphate and a certain proportion of phosphoric acid, and it is easy to agglomerate in humid air.
Uses: Used in boiler water treatment, electroplating, leather making, baking powder, fuel auxiliaries, detergents, mica blending, acid retarders, etc. It is also the raw material for the preparation of sodium hexametaphosphate and polycondensate salts.
Manufacturing
