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Author Topic: PHOSPHORIC ACID  (Read 841 times)

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  • Guest
« on: August 29, 2017, 02:23:41 AM »

Standard Data
CAS number: 7664-38-2, 16271-20-8 (hemihydrate)
PubChem: 1004
ChemSpider: 979
EC number: 231-633-2
UN number: 1805
KEGG: D05467
Chebi: 26078
RTECS number: TB6300000
Molecular formula: H3PO4
Molar mass: 97,995 g / mol
appearance is a white solid or colorless viscous liquid (> 42 ° C)
Density: 1.885 g / mL (liquid) 1.685 g / mL (85% solution)
2.030 g / ml (25 crystals)
Melting point: 42.35 ° C (anhydrous) 29.32 ° C (hemihydrate)
Boiling point: 158 ° C (decomposition)
Solubility in water 5.48 g / mL
Acidity (pKa) 2.148, 7.198, 12.377
viscosity 2.4-9.4 cP (85% aq. Soln.) 147 cP (100%)

General Information

The chemical formula is H3PO4, which consists of phosphoric acid, phosphorus, oxygen, hydrogen atoms. The pure form is a crystalline solid with a melting point of 42 ° C and is a colorless, syrupy liquid in the lower concentration forms. There are two types used in the industry and in the industry.

Production and Reactions

Orphophosphate salts are formed from phosphoric acid, a tribasic acid, by replacing one, two, or all three of the hydrogen ions with other positive ions. The type used in the industry is obtained by heating calcium phosphate rocks with sulfuric acid. Orphosphate salts come into play by substituting one, two or all three of the hydrogen ions with other positive ions.



  • Guest
methyl alcohol
« Reply #1 on: September 04, 2017, 08:15:41 PM »

Methyl alcohol is the simplest, aliphatic alcohol. The molecular formula is CH3OH. Endüstride is widely used in solvent form and is very easy to find. It is cheaper than other alcohols. Some of the most commonly used ingredients and the proportions of methyl alcohol they contain are given below
Pure methanol is a fluid liquid boiling at 64.6 degrees at 1 atm, burning with a bluish, non-bright flame. Soluble in all organic solvents. Even very small amounts of methanol are poisonous to the living organism. Permanent injuries lead to disorders. Drinking 25 grams of methanol causes blindness in humans.
Methanol was first obtained in 1661 by dry distillation of the wood (high temperature in the absence of air). The distillation product contains 1.5-3% methanol, 10% acetic acid, 0.5% acetone and others. Industrial is obtained from the reaction of carbon monoxide with hydrogen. Although pure methanol is obtained by this method, n-propanol and isobutanol can be formed when the temperature rises by 30-40 degrees. It is obtained in fractional distillation with a purity of 99% from the aqueous solution. Mg is used to obtain anhydrous (absolute) methanol:
2 CH3OH + Mg- (CH3O) 2Mg + H2
(CH3O) 2Mg + H2O - & gt; 2CH3OH + MgO


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