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PHOSPHORIC ACID CAS#78-42-2

Product Description of Phosphoric Acid (CAS#78-42-2)

Phosphoric acid is extensively utilized in the chemical industry as a flame retardant, plasticizer, and extraction agent. One of its most significant applications is in the production of hydrogen peroxide.

In the manufacture of trioctyl phosphate (TOP), it serves as a solvent for hydroanthraquinone systems. This solvent system offers high solubility for hydroanthraquinone derivatives, a favorable distribution coefficient of hydrogen peroxide between the aqueous and solvent phases, as well as a high boiling point and high flash point, ensuring efficient and safe processing.

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PHOSPHORIC ACID Chemical Propertie

Melting point-70°C
Boiling point215 °C4 mm Hg(lit.)
Density0.92 g/mL at 20 °C(lit.)
Vapor pressure2.1 mm Hg ( 20 °C)
Refractive indexn20/D 1.444(lit.)
Fp>230 °F
Storage tempStore below +30°C.
Solubility<0.001g/l
FormLiquid
Specific Gravity0.93
ColorColourless
PH7 (H2O, 20℃)
Water Solubility<0.1 g/100 mL at 18 ºC
BRN1715839
CAS DataBase Reference78-42-2(CAS DataBase Reference)
NIST Chemistry Reference2-Ethylhexanol phosphate (3:1)(78-42-2)
EPA Substance Registry SystemTris(2-ethylhexyl) phosphate (78-42-2)

Safety Information

Hazard CodesXi
Risk Statements38
Safety Statements23-43-24/25
WGK Germany2
RTECSMP0770000
Autoignition Temperature370 °C
TSCAYes
HS Code29190090
Hazardous Substances Data78-42-2(Hazardous Substances Data)
ToxicityLD50 orally in Rabbit: 37000 mg/kg LD50 dermal Rabbit 20000 mg/kg

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Product Application of Phosphoric Acid (CAS#78-42-2)

In the anthraquinone process for hydrogen peroxide production, it can serve as a substitute for hydroterpineol, enabling higher product concentration, improved quality, and reduced self-consumption during operation.

It is also suitable for use as a cold-resistant plasticizer in PVC applications, enhancing low-temperature performance.