Iron (II) sulfate heptahydrate or Green vitriol or Copperas or Iron sulfate heptahydrate

Product Overview & Quality

Product Name: Ferrous sulfate heptahydrate 99.5% or Iron (II) sulfate heptahydrate or Green vitriol or Copperas or Iron vitriol
Brand: QReC (Product Code: QR-I6007-1-0500)
Grade: Analytical Reagent High Purity Grade (AR Grade) featuring an exceptional certified chemical assay of not less than 99.5 percent in a 500 g laboratory container. Manufactured and multi-recrystallized under strict QReC global laboratory specifications without anti-caking additives, strictly maintaining stoichiometric heptahydrate crystalline hydration. Strictly analyzed to enforce an ultra-low threshold of oxidized ferric iron (Iron III strictly below 0.1 percent) and water-insoluble matter below 0.005 percent, alongside minimal ppm limits of chloride, phosphate, nitrogen compounds, manganese, copper, zinc, calcium, magnesium, sodium, potassium, and heavy metals. Uniform, dry green monoclinic crystals dissolve cleanly in water (acidified with trace sulfuric acid) to yield clear, particulate-free solutions. Packaged in a heavy-duty, moisture-barrier polymer container fitted with an airtight double hermetic seal to inhibit aerial oxidation.
Physical Properties: Pale blue-green to emerald-green translucent crystals or crystalline powder. Odorless with an intensely astringent, metallic taste. Efflorescent in dry air; highly susceptible to superficial aerial oxidation in moist air, gradually developing an insoluble brownish-yellow crust of basic ferric sulfate. Melting point is approximately 64 degrees Celsius. Non-combustible inorganic salt. Aqueous solutions are acidic (pH approximately 3.0 to 4.0 for a 5 percent aqueous solution at room temperature) and turn turbid upon oxidation unless stabilized with dilute acid.
Solubility: Readily and highly soluble in water (approximately 25 to 29 grams per 100 milliliters at 20 degrees Celsius, increasing to over 50 grams per 100 milliliters in boiling water; standard analytical compounding requires dissolution in deaerated water acidified with dilute sulfuric acid to suppress aerial oxidation and hydrolysis); soluble in glycerol; practically insoluble in ethanol.
Key Use: Universally utilized as the quintessential catalyst and source of ferrous ions in formulating Fenton’s Reagent (paired with hydrogen peroxide) to generate reactive hydroxyl free radicals in Advanced Oxidation Processes (AOPs) for the remediation and destructive degradation of refractory organic industrial pollutants and wastewater effluents. Extensively applied as a primary bioavailable iron micronutrient supplement in plant tissue culture media formulations (such as Murashige and Skoog / MS medium, typically stabilized as Fe-EDTA chelate) and microbiological broths. Heavily employed as an effective reducing agent in synthetic chemistry and environmental engineering, notably for reducing highly toxic, mobile hexavalent chromium (Chromium VI) into insoluble, benign trivalent chromium in contaminated effluents. Serves as a primary coagulant and flocculant for phosphate removal and sludge dewatering in wastewater treatment. Used as an iron chemical precursor for synthesizing specialty iron oxide pigments, magnetic nanoparticles, and coordination complexes.

Safety & Hazards (Harmful if Swallowed, Skin & Serious Eye Irritation)

Classification: Harmful if swallowed (Acute Toxicity Oral Category 4). Causes skin irritation (Skin Irritation Category 2). Causes serious eye irritation (Eye Irritation Category 2).
Health Risks: Direct ocular contact triggers acute chemical stinging, conjunctival erythema, corneal irritation, and profuse lacrimation. Prolonged or repeated dermal contact can cause localized dryness, erythema, or superficial contact irritation. Inhalation of particulate dust irritates the mucous membranes of the respiratory tract, inducing coughing, sneezing, and throat dryness. Critical Acute Ingestion Hazard: Ingestion of substantial quantities provokes acute systemic iron overload toxicity; acts corrosively on the gastrointestinal mucosa, causing severe hemorrhagic gastritis, epigastric pain, hematemesis, black tarry stools, metabolic acidosis, hypovolemic shock, hepatic necrosis, and potential fatality (especially dangerous to young children).
First Aid Measures: Immediately flush affected eyes with an abundant stream of clean flowing water for at least 15 minutes while stripping contaminated clothing; remove contact lenses promptly and seek medical attention if irritation persists. Wash exposed skin thoroughly with soap and water. In case of dust inhalation, relocate the individual to fresh air. If accidentally swallowed, do NOT induce vomiting; thoroughly rinse mouth, administer water in moderate amounts to dilute, and seek immediate emergency medical evaluation (chelation therapy with deferoxamine may be indicated by medical professionals).

Handling & Storage

Storage: Air-Sensitive, Moisture-Sensitive Ferrous Salt. Atmospheric moisture and oxygen accelerate oxidation to insoluble basic ferric species. Must be preserved in its original, tightly closed QReC container. Store in a clean, strictly dry, cool, and well-ventilated dedicated chemical store at controlled temperatures (below 25 to 30 degrees Celsius), sheltered from atmospheric humidity and direct sunlight. Keep strictly segregated from strong oxidizing agents (such as perchlorates, permanganates, hydrogen peroxide, and concentrated nitric acid) and caustic alkalis (which instantaneously precipitate iron hydroxides).
Precautions: Standard laboratory PPE is mandatory, including protective nitrile gloves, splash-proof safety goggles, and a protective lab coat. “Technical Recommendation: Compounding standard analytical solutions requires using degassed deionized water acidified with a few drops of concentrated sulfuric acid prior to dissolving the crystals to inhibit spontaneous oxidation and turbidity.” Re-seal container cap tightly immediately after sampling to prevent caking and oxidation. Minimize dust generation during weighing and dispensing.