IUPAC Name: Pentyl dihydrogen phosphate
Synonyms of Pentyl ester phosphoric acid (CAS NO.12789-46-7) : Pentyl dihydrogen phosphate ; Phosphoric acid, monopentyl ester ; Amyl acid phosphate ; Amyl dihydrogen phosphate
CAS NO:  12789-46-7
Molecular Formula:C₅H₁₃O₄P                    
Molecular Weight :168.1281                  
Molecular Structure :
EINECS: 235-827-8
Index of Refraction: 1.452   
Surface Tension: 46.3 dyne/cm 
Density: 1.23 g/cm³ 
Flash Point: 126.5 °C 
Enthalpy of Vaporization: 57.73 kJ/mol 
Boiling Point: 285.6 °C at 760 mmHg 
Vapour Pressure: 0.000714 mmHg at 25°C 
Appearance: Pentyl ester phosphoric acid (CAS NO.12789-46-7) is a colorless liquid.
Water solubility:Insoluble in water.

 Pentyl ester phosphoric acid (CAS NO.12789-46-7) is used as a curing agent in paints and plastics and in the manufacture of synthetic fibers.

Corrosive and irritating to the skin, eyes, and mucous membranes. When heated to decomposition it emits toxic fumes of PO_x. See also ESTERS.

RIDADR 2819
HazardClass 8
PackingGroup III

DOT Classification:  8; Label: Corrosive

1.General Description : Burns, though difficult to ignite. Denser than water and is insoluble in water. Hence, sinks in water. Corrosive to metals and tissue. Vapors are heavier than air. Used as a curing agent in paints and plastics and in the manufacture of synthetic fibers.
2.Reactivity Profile :Pentyl dihydrogen phosphate is an organophosphate. Organophosphates are susceptible to formation of highly toxic and flammable phosphine gas in the presence of strong reducing agents such as hydrides. Partial oxidation by oxidizing agents may result in the release of toxic phosphorus oxides.
3.Health Hazard :TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
4.Fire Hazard :Combustible material: may burn but does not ignite readily. When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion hazards. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. Runoff may pollute waterways. Substance may be transported in a molten form.