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English Name: polyphosphoric acid, PPA for short.
Representative formula:H6P4O13
Molecular weight: 337.93
Classification and number of hazard Code: GB8 Class 1 815052. Original iron specification: Grade II inorganic acid corrosive articles, 93007
Uses: as cyclizing agent and acylating agent, analytical reagent and substitute of orthophosphoric acid in organic synthesis.
Physicochemical properties: colorless, transparent and viscous liquid. Easy to deliquescence, non crystalline, soluble in water and hydrolyzed to orthophosphoric acid.
Hazardous characteristics: non combustible. However, contact with H pore forming agent will cause combustion. Not very corrosive. Hydrolyze to orthophosphoric acid in water.
Emergency measures and fire fighting methods:
Put out the fire with water. And keep the containers in the fire site cool with mist water. First aid: prevent phosphoric acid from contacting the skin and splashing into the eyes, so as to avoid serious skin burn and eye corrosion. The patient should be separated from the contaminated area, take off his clothes immediately, wash his skin and eyes with a large amount of water, and then apply magnesium oxide glycerin ointment on his skin. If there is any burn, send him to the hospital for treatment. If you take it by mistake, rinse your mouth immediately, use magnesium milk for drinking water, and send it to the hospital for treatment.
Storage and transportation conditions:
Corrosives. Packing method: (Class III). Wooden cases are used outside plastic barrels or glass bottles, lined with non combustible materials. Storage and transportation conditions: store in a dry and cool place. It is strictly prohibited to store and transport together with alkali, drugs and perishable products. Operators must wear acid resistant protective articles. Leakage treatment: wear gas masks and gloves for leakage treatment. Sprinkle sodium carbonate on the polluted ground, wash with water, and put the diluted sewage into the wastewater system.
Specifications and quality indicators:
Project | Index | |
Food grade | Industrial grade | |
content | ≥117% | ≥115—116% |
Content (P2O5)% | ≥85% | ≥83—84% |
chloride | ≤0.001 | ≤0.001 |
Sulfate radical | 0.002 | 0.01 |
Viscosity (centipoise) | 35000 | 35000 |
Chromaticity (HEPP) | 20 | 50 |
Heavy metals (PB)% | ≤0.001 | ≤0.01 |
Iron content (FE)% | ≤0.001 | ≤0.01 |
Arsenic content (as)% | ≤0.0050 | ≤0.01 |
Manufacturing
