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Zinc sulfate heptahydrate

CAS Number
7446-20-0
EC Number
616-097-3
Chemical Formula
H2O4S.7H2O.Zn
Molecular Weight
287.6 g/mol

Description

Zinc sulfate heptahydrate (CAS 7446-20-0 ), commonly referred to as white vitriol, is an inorganic zinc salt used across agriculture, industrial processing, and nutrition applications. It delivers a soluble, bioavailable source of zinc for use in fertilizers and feed supplements. In agriculture, it corrects zinc deficiency in crops when applied as a foliar spray or soil amendment, directly improving yield quality in zinc-sensitive crops such as cereals and legumes. This ensures optimal growth and health for various plant species. Animal feed producers incorporate it as a zinc source in premixes and mineral supplements to meet livestock nutritional requirements. In water treatment, it functions as a coagulation aid and algaecide for controlling biological growth in reservoirs. Textile and leather processors use it as a mordant and preservative in dyeing and tanning operations. Consistent zinc concentration is critical to process control in these industrial manufacturing environments to ensure high-quality finished goods. Zinc sulfate heptahydrate is supplied as white crystalline powder or granules, with granulated forms preferred for fertilizer blending. Powder grades are typically used in liquid formulation and other specialized chemical processes. Standard grades include technical, feed-grade, USP , and BP , with feed and pharmaceutical grades requiring documented purity and heavy metal limits. These certifications ensure the material meets strict safety and quality benchmarks. Bulk supply is available in bags or big bags, with solution concentrations also offered for certain industrial applications. This flexibility in packaging allows for efficient logistics and handling across different sectors and global markets. Contact us for supply of Zinc sulfate heptahydrate Request Quote

Other Names (Synonyms)

ZnSO4.7H2O | Sulfuric acid, zinc salt (1:1), heptahydrate | N57JI2K7WP | ZINCUM SULPHURICUM | RefChem:1101168

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point100 °C
Density1.97 g/cm³
AppearanceColorless crystals, small needles, or granular, crystalline powder
without odor
astringent, metallic taste. Efflorescent in air. Solutions acid to litmus. Loses 7H2O at 280C. Soluble in water and glycerol
insoluble in alcohol.
ColorWhite
Odorodorless, astringent taste
FormSolid
Water Solubility960 g/L
pH4-6 (50g/l, H2O, 20℃)

Safety & Handling

Danger
GHS05· CorrosiveGHS07· IrritantGHS09· EnvironmentGHS08· Health Hazard

Hazard Statements

H302Harmful if swallowed
H315Causes skin irritation
H316Causes mild skin irritation
H318Causes serious eye damage
H319Causes serious eye irritation
H335May cause respiratory irritation
H371May cause damage to organs
H400Very toxic to aquatic life
H410Very toxic to aquatic life with long lasting effects

Precautionary Statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash … thoroughly after handling.
P270Do not eat, drink or smoke when using this product.
P271Use only outdoors or in a well-ventilated area.
P273Avoid release to the environment.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P317Get emergency medical help.
P319Get medical advice/attention if you feel unwell.
P321Specific treatment (see … on this label).
P330Rinse mouth.
P391Collect spillage.
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P317Get emergency medical help.
P352IF ON SKIN: Wash with plenty of water.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P316Get emergency medical help immediately.
P317Get emergency medical help.
P317If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P364Take off contaminated clothing and wash it before reuse.
P233Store in a well-ventilated place. Keep container tightly closed.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code28332600
UN Number3077
ADR Class9
Packing GroupIII
Storage Class13 - Non Combustible Solids
WGK (Germany)3