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Industrial phosphoric acid

CAS Registry Number (CASRN):

۷۶۶۴-۳۸-۲ , 16271-20-8 ,


Industrial phosphoric acid ,


H3PO4 ,


liquid ,

purity (%):

65 ,

CAS Registry Number (CASRN):

۷۶۶۴-۳۸-۲ , 16271-20-8 ,

SAX Number:

E4GA8884NN ,

Molar mass (g/mol):

98.00 ,

Density (g/cm3):

1.885 ,

Melting point (°C):

42.35 ,

Boiling point (°C):

158 ,

Acidity (pKa):

2.148 7.198 12.375 ,


Phosphoric acid

Phosphoric acid, also called orthophosphoric acid, (H3PO4), the most important oxygen acid of phosphorus, used to make phosphate salts for fertilizers. It is also used in dental cements, in the preparation of albumin derivatives, and in the sugar and textile industries. It serves as an acidic, fruitlike flavouring in food products.

Pure phosphoric acid is a crystalline solid (melting point 42.35° C, or 108.2° F); in less concentrated form it is a colourless syrupy liquid. The crude acid is prepared from phosphate rock, while acid of higher purity is made from white phosphorus.

Phosphoric acid molecules interact under suitable conditions, often at high temperatures, to form larger molecules (usually with loss of water).

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