Structure of Zinc sulfate heptahydrate (CAS NO.7446-20-0):

IUPAC Name: zinc sulfate heptahydrate 
Empirical Formula: H₁₄O₁₁SZn
Molecular Weight: 287.5786 
EINECS: 231-793-3 
Melting Point: 100 °C
Boiling Point: 330 °C at 760 mmHg 
Enthalpy of Vaporization: 62.94 kJ/mol 
Vapour Pressure: 3.35E-05 mmHg at 25°C
Water Solubility: 960 g/L 
Physical Appearance: colourless to white crystalline solid
Stability: Stable. Incompatible with strong oxidizing agents. Hygroscopic - protect from moisture. 
Product Categories: INORGANIC & ORGANIC CHEMICALS;Inorganics;Reagent Plus;Metal and Ceramic Science;Salts;Zinc Salts;Chemical Synthesis;Cell Culture;Miscellaneous Reagents and Supplements;Reagents and Supplements;ACS GradeChemical Synthesis;Catalysis and Inorganic Chemistry;Essential Chemicals;Routine Reagents;Zinc;Analytical Reagents for General Use;Puriss p.a. ACS;T-Z, Puriss p.a. ACS;Pharmacopoeia (USP);Pharmacopoeial Inorganics;Pharmacopoeia A-ZPharmacopoeia (USP) 
Synonyms of Zinc sulfate heptahydrate (CAS NO.7446-20-0): Sulfuric acid, zinc salt (1:1), heptahydrate ; Verazinc ; White vitriol (heptahydrate) ; Zinc sulfate ; Zinc sulfate (1:1) heptahydrate ; Zinc sulfate (ZnSO4) heptahydrate ; Zinc vitriol (heptahydrate)

Zinc sulfate heptahydrate (CAS NO.7446-20-0) is used as mordant, wood preservative, and the bleach in papermaking industry. 
Zinc sulfate heptahydrate (CAS NO.7446-20-0) is also used in medicine, man-made fibers, electrolysis, electroplating, pesticide and production of zinc salt, etc.

 Zinc and its compounds are on the Community Right-To-Know List.

Safety Information of ZINC SULFATE HEPTAHYDRATE(7446-20-0):
Hazard Codes:Xn ,N
Risk Statements:22-41-50/53-36/38
22:Harmful if swallowed.
41:Risk of serious damage to eyes.
50/53:Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
36/38:Irritating to eyes and skin
Safety Statements:22-26-39-46-60-61-25
22:Do not breathe dust.
26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
39:Wear eye/face protection.
46:If swallowed, seek medical advice immediately and show this container or label.
60:This material and its container must be disposed of as hazardous waste.
61:Avoid release to the environment. Refer to special instructions/safety data sheets.
25:Avoid contact with eyes
RIDADR:UN 3077 9/PG 3
WGK Germany:3
RTECS:ZH5300000
HS Code:28332600
Human poison by an unspecified route. Poison experimentally by subcutaneous, intravenous, and intraperitoneal routes. Moderately toxic by ingestion. Experimental reproductive effects. When heated to decomposition it emits toxic fumes of SO_x and ZnO. See also ZINC SULFATE.

First Aid Measures of Zinc sulfate heptahydrate (CAS NO.7446-20-0):
Eyes:Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
Skin:Get medical aid. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
Ingestion:Get medical aid. Wash mouth out with water.
Inhalation:Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.