GENERAL INSTRUCTIONS
In dissolving QC Corporation’s Dried Ferrous Sulfate
Heptahydrate (Fe ~20%) or Moist Ferrous Sulfate
(Fe ~18%) product in water, the following variables should
be considered:
A. Temperature of water used
B. Content of water used
C. pH of water used
Experiments in dissolving Ferrous Sulfate have disclosed that distilled water, at a temperature of 60ºF., will become totally saturated with iron salts whenever ~33.3% by weight of dried Ferrous Sulfate Heptahydrate is added to ~66.6% by weight water. The resulting solution should weigh approximately 9.69 pounds per gallon. To achieve the same solution with Moist Ferrous Sulfate requires ~35.5% Moist Ferrous Sulfate by weight added to ~64.5% by weight water. In addition, this same solution should have a Baumé of 24.5, a specific gravity of 1.19, and contain ~19% FeSO4. The above calculations will vary with contents, pH and temperature of the liquid being used. Greater quantities of Ferrous Sulfate can be totally dissolved in water temperatures above 60ºF., and conversely, less Ferrous Sulfate can be totally dissolved in water temperatures below 60ºF. If a Ferrous Sulfate solution becomes over-saturated, the iron salts will begin to precipitate out and drop to the bottom of the container used.
PHYSICAL PROPERTIES LIQUID @ 60ºF
- Molecular Weight 278
- Specific Gravity 1.15 - 1.19
- Lbs./Gal. FeSO4 Solution 9.69
- Lbs. Of FeSO4/Gal. 2.86
- Lbs. Fe/Gal. 0.50 - 0.59
- Crystallization Begins 29ºF
- pH 1.5 - 2.2
- Insolubles (As TSS) <0.5%
FERROUS SULFATE
HEPTAHYDRATE SOLUBILITY
| Temp. °C/°F |
Gm. Gal. |
Lbs./ Gal. |
Lbs. Iron (Fe)/Gal. |
Specific Gravity* |
| 0/32 | 600.5 | 1.32 | 0.26 | 1.158 |
| 10/50 | 787.1 | 1.73 | 0.35 | 1.208 |
| 20/68 | 1014 | 2.23 | 0.45 | 1.268 |
| 30/86 | 1259 | 2.77 | 0.56 | 1.334 |
| 40/104 | 1545 | 3.40 | 0.68 | 1.411 |
| 50/122 | 1848 | 4.07 | 0.81 | 1.494 |
Accuracy ± 2%
*Calculated
When physically dissolving Ferrous Sulfate Heptahydrate into a solution, it is suggested that a mechanical agitator be used, such as a “Lightnin” type mixer, to expose the crystals to the water solution before they have a chance to settle to the bottom of the mixing vessel. Another means of agitation can be the use of a recirculating pump to draw the solution from the bottom of the mixing vessel and returning it near the top as the Ferrous Sulfate is being added. Extreme agitation or the use of air generation should be avoided, as these methods would induce oxygen into the solution resulting in a chemical conversion of ferrous iron to ferric iron. Since most Ferrous Sulfate solutions have a pH of approximately 2, it is recommended that all handling equipment, including mixers, vessels, piping and pumps be made of synthetic, non-corrosive materials of construction, such as PVC or stainless steel.
The above information is to be used as a guide only. Each application of Ferrous Sulfate Heptahydrate should be evaluated on a case-by-case basis by trying to dissolve the material in solution, using various types of water or other solutions.
Information regarding the contents and levels of metals in this product is available on the Internet at http://www.agr.wa.gov or http://www.qccorporation.com
Sales Office: One Reservoir Circle, Suite 100 Baltimore, Maryland 21208 1-800-883-0010 FAX 410-486-0895 info@qccorporation.com www.qccorporation.com
PHYSICAL PROPERTIES OF AQUEOUS FERROUS SULFATE
SOLUTIONS AT 68ºF
| Bé | Specific Gravity |
Percent FeSO4 |
Gm./Liter | Lbs./Cu. Ft. | Lbs./Gal. |
| 0.1 | 1.0007 | ~0.2% | 2.001 | 0.1249 | 0.0167 |
| 0.4 | 1.0028 | ~0.4% | 4.011 | 0.2504 | 0.0335 |
| 0.7 | 1.0046 | ~0.6% | 6.028 | 0.3763 | 0.0503 |
| 0.9 | 1.0065 | ~0.8% | 8.052 | 0.5027 | 0.0672 |
| 1.2 | 1.0085 | ~1.0% | 10.09 | 0.633 | 0.0842 |
| 2.6 | 1.0180 | ~2.0% | 20.36 | 1.271 | 0.1699 |
| 5.2 | 1.0375 | ~4.0% | 41.50 | 2.591 | 0.3463 |
| 7.9 | 1.0575 | ~6.0% | 63.45 | 3.961 | 0.5295 |
| 10.6 | 1.0785 | ~8.0% | 86.28 | 5.386 | 0.7200 |
| 13.2 | 1.1000 | ~10.0% | 110.0 | 6.867 | 0.9180 |
| 15.8 | 1.1220 | ~12.0% | 134.6 | 8.405 | 1.1240 |
| 18.3 | 1.1445 | ~14.0% | 160.2 | 10.00 | 1.3370 |
| 20.8 | 1.1675 | ~16.0% | 186.8 | 11.66 | 1.5590 |
| 23.2 | 1.1905 | ~18.0% | 214.3 | 13.38 | 1.7880 |
| 25.5 | 1.2135 | ~20.0% | 242.7 | 15.15 | 2.0250 |
| Bé | Specific Gravity |
Percent FeSO4 * 7H20 |
Gm./Liter | Lbs./Cu. Ft. | Lbs./Gal. |
| 0.1 | 1.0007 | ~0.37% | 3.663 | 0.2287 | 0.0306 |
| 0.4 | 1.0028 | ~0.73% | 7.341 | 0.4583 | 0.0613 |
| 0.7 | 1.0046 | ~1.10% | 11.03 | 0.6887 | 0.0921 |
| 0.9 | 1.0065 | ~1.46% | 14.74 | 0.9200 | 0.1230 |
| 1.2 | 1.0085 | ~1.83% | 18.46 | 1.152 | 0.1540 |
| 2.6 | 1.0180 | ~3.66% | 37.26 | 2.326 | 0.3110 |
| 5.2 | 1.0375 | ~7.32% | 75.95 | 4.742 | 0.6339 |
| 7.9 | 1.0575 | ~11.0% | 116.1 | 7.249 | 0.9691 |
| 10.6 | 1.0785 | ~14.6% | 157.9 | 9.858 | 1.3180 |
| 13.2 | 1.1000 | ~18.3% | 201.3 | 12.57 | 1.6800 |
| 15.8 | 1.1220 | ~22.0% | 246.4 | 15.38 | 2.0560 |
| 18.3 | 1.1445 | ~25.6% | 293.3 | 18.31 | 2.4470 |
| 20.8 | 1.1675 | ~29.3% | 341.9 | 21.34 | 2.8530 |
| 23.2 | 1.1905 | ~32.9% | 392.2 | 24.48 | 3.2730 |
| 25.5 | 1.2135 | ~36.6% | 444.2 | 27.73 | 3.7070 |
QC’s Diamond Brand® Ferrous (Iron) Sulfate products are registered in Canada as a Pest Control Product (PCP) under the Canadian PCP Act.
The information and statements herein are believed to be reliable but are not to be construed as a warranty or representation for which we assume legal responsibility. Users should undertake sufficient verification and testing to determine the suitability for their own particular purpose of any information or products referred to herein. NO WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE IS MADE.
Information regarding the contents and levels of metals in this product is available on the Internet at http://www.agr.wa.gov or http://www.qccorporation.com
Sales Office: One Reservoir Circle, Suite 100 Baltimore, Maryland 21208 1-800-883-0010 FAX 410-486-0895 info@qccorporation.com www.qccorporation.com