Ferrous sulfate CAS#7720-78-7

Green vitriol (iron(II) sulfate, FeSO₄·7H₂O) has been known since the 13th century and is traditionally obtained by crystallization from iron or iron-based materials reacted with dilute sulfuric acid.


High Solubility & Multiple Hydration Forms:The heptahydrate forms green monoclinic crystals with high water solubility (296 g/L at 25 °C) and can be converted into mono-, tetra-, or anhydrous forms through controlled dehydration processes.


Thermal Transformation Capability:Upon heating, iron(II) sulfate undergoes systematic dehydration and eventually decomposes at high temperatures to form iron(III) oxide (Fe₂O₃), releasing sulfur dioxide and sulfur trioxide.


Industrial Relevance of Iron(III) Oxide:The resulting iron(III) oxide, also known as hematite, is a stable, high-temperature-resistant material widely used in industry. It dissolves in dilute acids to form iron(III) salts and can be reduced to metallic iron under controlled conditions.


Phone :+86 13165319682
WhatsApp :+86 13165319682
Email :admin@sdhf-chemical.com
Send Inquiry →

Product Description

Products Description of Ferrous sulfate CAS#7720-78-7

Ferrous sulfate (green vitriol, FeSO₄·7H₂O) is a water-soluble iron compound produced from iron and dilute sulfuric acid. It has heptahydrate, tetrahydrate and monohydrate forms, and decomposes to industrial-grade hematite (iron(III) oxide) and sulfur oxides when strongly heated.


Product Applications of Ferrous sulfate CAS#7720-78-7

Ferrous sulfate is a high-bioavailability iron source (20% elemental iron as heptahydrate, 32% as dried form) used in nutritional supplements and food fortification (baking mixes, infant foods, cereals, pasta). Encapsulated grades have better stability. It is also a key raw material for sulfur dioxide, sulfuric acid and iron-based compound production.

Product Information

Parameters


Melting pointdecomposes at 671℃ [JAN85]
density3.65
vapor pressure0Pa at 20℃
storage temp.Store at +15°C to +25°C.
solubilityWater (Slightly)
formwhite orthorhombic crystals
colorwhite orthorhombic crystals, crystalline; hygroscopic
Odorat 100.00?%. odorless
PH2.5 (20°C, 50g/L in H2O)
Water Solubilityg/100g solution H2O: 13.6 (0°C), 22.8 (25°C), 24.0 (100°C); solid phase, FeSO4 · 7H2O (0°C, 25°C), FeSO4 ·H2O (100°C) [KRU93]
Dielectric constant14.2(14℃)
Cosmetics Ingredients FunctionsASTRINGENT
InChIInChI=1S/Fe.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
InChIKeyBAUYGSIQEAFULO-UHFFFAOYSA-L
SMILES[Fe+2].S([O-])([O-])(=O)=O
CAS DataBase Reference7720-78-7(CAS DataBase Reference)
NIST Chemistry ReferenceFerrous sulfate(7720-78-7)
EPA Substance Registry SystemFerrous sulfate (7720-78-7)


Safety Information


Risk Statements25
Safety Statements45
HS Code28332910
Hazardous Substances Data7720-78-7(Hazardous Substances Data)
ToxicityLD50 oral in rat: 319mg/kg


Factory Showcase

拼图_美图设计室-(1)

Quality Control Lab

实验室

Shipping And Transportation

拼图_美图设计室

FAQ

Q1: Is Huafeng Chemical a manufacturer or a trader?
A: We are a professional service provider specializing in chemical foreign trade. Rather than being limited to the products of a single factory, we leverage the chemical industry cluster in Shandong Province to integrate production resources from multiple high-quality manufacturers. This allows us to offer a wide range of sourcing options—covering various product categories and origins—instead of simply pushing a single product. Furthermore, our core competitiveness lies in our professional foreign trade services (covering documentation, logistics, and regulatory compliance), ensuring a smooth and worry-free procurement process for you.


Q2: How is the security of my transaction guaranteed when working with Huafeng Chemical?
A: We strictly adhere to international trade rules (Incoterms® 2020) and accept various payment methods, such as Letters of Credit (L/C) and Telegraphic Transfers (T/T). For new clients, we support small-batch trial orders and can clearly define arbitration clauses and applicable laws within the contract. Additionally, we maintain a robust risk management system to help you mitigate common trade risks, such as exchange rate fluctuations, shipping delays, and document discrepancies.


Q3: Do you have experience serving clients in Russian-speaking regions?
A: Yes. We place great importance on the Russian-speaking market; our team includes Russian-speaking business professionals who are well-versed in the import regulations of Russia and the Eurasian Economic Union (EAEU). We understand the importance of EAC certification to clients in these regions and can assist with related compliance inquiries. We have established connections with chemical traders across various CIS countries and have gained valuable experience in specialized packaging and temperature-controlled shipping designed to withstand harsh local winter conditions.


Q4: How do you guarantee product quality?
A: We implement a strict supplier qualification and periodic audit system. A Certificate of Analysis (COA)—issued by the original manufacturer—is provided with every shipment. We also welcome pre-shipment inspections conducted by internationally recognized third-party agencies such as SGS, BV, or ITS. Should the test results fail to meet the standards specified in the contract, you have the right to reject the goods or request a replacement.

Contact Us

Submit

Recommendation