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:::: PHOSPHORIC ACID SPECIFICATIONS :::: |
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Sl No. |
Characteristic |
Specification |
1 |
Description |
It is clear colorless, odourless, viscous liquid |
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2 |
Identification |
Highly acidic even in high dilutions. |
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3 |
Solubility |
Miscible in water and ethanol |
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4 |
Specific gravity |
The specific gravity at 25 o C / 25 o C of phosphoric acid containing 85% H 3 PO 4 is 1.71 |
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5 |
Purity as H 3 PO 4 , % by mass, Min. |
85.0 |
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6 |
Fluoride, mg/kg, Max. |
10 |
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7 |
Total heavy metals (as Pb),mg/kg, Max |
10 |
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8 |
Lead (as Pb), mg/kg, Max. |
5 |
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9 |
Arsenic (as As), mg/kg, Max |
3 |
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:::: PHOSPHORIC ACID - TECH GRADE :::: |
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| DESCRIPTION : Clear, Colourless and Odourless syrupy liquid |
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| Characteristic |
SCL Specification |
Result |
Method |
| Orthophosphoric acid H3PO4' w/w min |
86.0 |
86.30 |
IS-798-1986
(Method A) |
P2O5' % w/w, min |
62.3 |
62.50 |
* |
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| Specific gravity at 20 C min. |
1.700 |
1.7039 |
Sp.Gr. Bottle |
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| Iron as Fe, ppm, max |
10.0 |
2.90 |
(A-4) |
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| Calcium as Ca, ppm, max |
80.0 |
2.90 |
AAS |
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| Magnessium as Mg, ppm, max |
5.0 |
1.85 |
AAS |
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| Heavy metals as Pb, ppm, max |
10.0 |
10 |
(A-10) |
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| Chloride as Cl, ppm, max |
20.0 |
12.0 |
(A-5) |
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| Flouride as F, ppm, max |
100.0 |
79.0 |
lon Selective electrode |
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| Sulphate as SO4, ppm, max |
300.0 |
151.0 |
(A-6.2) |
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