Properties & Applications & PackagesInquiry

Technical Datas

Items	Standards (Common Grade)	Standards (FCC VII)
Content,w/%	99.0-108.7	99.0-108.7
Arsenic(As),w/% ≤	0.0003	-
Alkalis and Alkaline Earths,w/% ≤	0.5	0.5
Acidity,	Pass Test	Pass Test
Selenium(Se),w/% ≤	0.003	0.003
Mercury(Hg),w/% ≤	0.0001	0.0005
Lead(Pb),w/% ≤	0.0004	0.0004
Cadmium(Cd),w/% ≤	0.0002	0.0002

Physical and Chemical Properties

-At room temperature, food-grade zinc sulfate heptahydrate appears as white granules or powder with an orthorhombic crystal structure . It has a density of 1.957 g/cm³ and a melting point of 100°C .

Key characteristics:

-High water solubility: 960 g/L at 20°C, making it suitable for liquid formulations

-Slight solubility in ethanol and glycerol

-Astringent taste and odorless properties

-Hygroscopic nature: Weathers in dry air and requires sealed storage

-Thermal decomposition: Loses crystal water progressively when heated (1 molecule at 30°C, 6 molecules at 100°C, and all 7 molecules at 280°C), eventually decomposing into zinc oxide and sulfur trioxide at 767°C

Food-Grade Applications and Uses

-As a zinc fortifier, food-grade zinc sulfate heptahydrate serves as an essential nutritional supplement:

Nutritional Fortification: It functions as a zinc supplement in various food products, providing the essential trace element zinc which is a component of many enzymes and proteins involved in carbohydrate and fat metabolism .

-Specific Food Applications:

Beverages: Carbonated drinks, soy milk, juices, tea drinks, and nutritional drinks

Dairy products: Milk, flavored milk, fermented milk, and milk powder

Baked goods: Bread and cakes

Processed foods: Meat products, aquatic products, and condiments

Oral Care: In food-grade applications, it serves as an antimicrobial and astringent agent in oral care products .

Animal Nutrition: It is widely used as a zinc supplement in animal feed to prevent deficiencies that can cause incomplete keratinization, stunted growth, hair deterioration, and reproductive issues

Zinc Sulfate Heptahydrate