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phosphoric acid
Quality standard: GB2091-2003, CASNO:7664-38-2
Molecular formula: H3PO4
Molecular weight: 97.99
Appearance: colorless, transparent or slightly yellowish, thick liquid
Physical and chemical properties:
85% phosphoric acid is a colorless or slightly color, in the form of a thick liquid, eutectic point 42.35 DEG C, boiling point 213 DEG C (lost by) is generated pyrophosphate, heated to 300 DEG C into metaphosphate, easy solution in water, soluble in ethanol, the acid is sulfuric acid, hydrochloric acid and nitric acid is weak, is acetic acid, boric acid and strong, concentrated phosphoric acid in porcelain heating with erosion, hygroscopicity.
Quality standard:
Serial number
Index name
Index (85%)
Top product
First Grade
Qualified product
One
Appearance
Colorless, transparent or slightly lighter liquid.
Two
White, black was less than
Twenty
Thirty
Forty
Three
Phosphoric acid (H3PO4),% >
Eighty-five
Eighty-five
Eighty-five
Four
Chloride (as Cl-),% less than
Zero Point Zero Zero Zero Five
Zero Point Zero Zero Zero Five
Zero point zero zero one
Five
Sulfate (as SO2-4),% less than
Zero point zero zero three
Zero Point Zero Zero Five
Zero point zero one
Six
Iron (Fe),% less than
Zero point zero zero two
Zero point zero zero two
Zero Point Zero Zero Five
Seven
Arsenic (AS),% less than
Zero point zero zero zero one
Zero Point Zero Zero Five
Zero point zero one
Eight
The metal (as Pb),% less than
Zero point zero zero one
Zero point zero zero one
Zero Point Zero Five
Use:
Used in the production of feed grade calcium hydrogen phosphate, metal surface phosphate processing prepared electrolytic and chemical polishing liquid used for polishing of aluminum products.
Pharmaceutical industry for the manufacture of sodium phosphate, iron phosphate, etc., also used in the manufacture of zinc phosphate as a dental adhesive, used as a catalyst for the condensation of phenolic resins, dyes and intermediates used in the production of desiccant.
Printing and dyeing industry for the preparation of wipe cleaning solution for offset printing on the spot. Also used in the preparation of the match stem dipping solution.
Metallurgical industry is used to produce phosphoric acid refractory sludge, and to improve the life of the furnace. Is the production of rubber slurry and the raw material of inorganic coagulant.
Paint industry used as metal anti rust paint.
