Zinc sulfate

Athanor · official

O₄SZn · 161.4 g/mol

Also called white vitriol

Inorganic

Open in Athanor

Drawn from its SMILES with RDKit

DangerHarmful if swallowed · Causes serious eye damage · Very toxic to aquatic life · Very toxic to aquatic life with long lasting effects

Names and identifiers

IUPAC name: zinc sulfate
Synonyms: white vitriol, Zinc sulphate, Zinc sulfate anhydrous
+ 36 more
Zincate, White vitriol, Bonazen, Medizinc, Optised, Optraex, Orazinc, Solvezinc, Solvezink, Zincomed, Zinklet, Zinkosite, Neozin, White copperas, Zinc sulfate (1:1), Zinc vitriol, Sulfate de zinc, Visine-ac, Zinci Sulfas, Prefrin-Z, Zincum Sulfuricum, Zink-Gro, OP-Thal-zin, zinc(II) sulfate, Bufopto zinc sulfate, Sulfuric acid, zinc salt (1:1), component of Phenylzin, ZnSO4, Zinc sulfate (ZnSO4), Sulfuric acid, zinc salt, Zinc-200, Zinc sulphate anhydrous, Zinc sulfate, anhydrous, Zinc sulphate, anhydrous, Zinc sulfate (anhydrous), 0J6Z13X3WO
Molecular formula: O₄SZn
Empirical formula: O₄SZn
Molecular weight: 161.4 g/mol
Exact mass: 159.88087
CAS number: 7733-02-0
PubChem CID: 24424
Canonical SMILES: [O-]S(=O)(=O)[O-].[Zn+2]
Isomeric SMILES: [O-]S(=O)(=O)[O-].[Zn+2]
InChI: InChI=1S/H2O4S.Zn/c1-5(2,3)4;/h(H2,1,2,3,4);/q;+2/p-2
InChIKey: NWONKYPBYAMBJT-UHFFFAOYSA-L
Molfile

Names, InChI and the identifiers from PubChem, retrieved 2026-10-14.

Physical properties

TemperaturePressureDensity

Appearance: Anhydrous zinc sulfate is a colorless crystalline solid. Zinc sulfate is also obtained as a hexahydrate, ZnSO4.6H2O, and as a heptahydrate ZnSO4.7H2O. All forms are soluble in water. All are noncombustible. The primary hazard is the threat posed to the environment. Immediate steps should be taken to limit its spread to the environment. It is used in the production of rayon, as a feed supplement, and as a fertilizer ingredient.[1]
3 values
From CAMEO Chemicals, the most authoritative source here.
Value As written Source
–shown Anhydrous zinc sulfate is a colorless crystalline solid. Zinc sulfate is also obtained as a hexahydrate, ZnSO4.6H2O, and as a heptahydrate ZnSO4.7H2O. All forms are soluble in water. All are noncombustible. The primary hazard is the threat posed to the environment. Immediate steps should be taken to limit its spread to the environment. It is used in the production of rayon, as a feed supplement, and as a fertilizer ingredient. [1] CAMEO Chemicals
– CBI; Large Crystals; Other Solid; Wet Solid; Dry Powder; Liquid; Other Solid; Liquid; Dry Powder; Large Crystals [2] EPA Chemical Data Reporting (CDR)
– COLOURLESS HYGROSCOPIC CRYSTALS. [3] ILO-WHO International Chemical Safety Cards (ICSCs)
Melting point: 100 °C (212 °F, USCG 1999)[1]
Density: 3.74 @ 15°C[5]
3 values
2 of 3 sources agree on it (most common value).
Value As written Source
– 1.96 at 68 °F (USCG, 1999) - Denser than water [1] CAMEO Chemicalscites U.S. Coast Guard. 1999. Chemical Hazard Response Information System (CHRIS) - Hazardous Chemical Data. Commandant Instruction 16465.12C. Washington, D.C.: U.S. Government Printing Office.
– 3.8 g/cm³ [3] ILO-WHO International Chemical Safety Cards (ICSCs)
–shown 3.74 @ 15°C [5] PAC Chemical Database, U.S. Department of Energy
Solubility in water: Solubility in water, g/100ml at 20 °C: 22 (good)[3]
3 values
From ILO-WHO International Chemical Safety Cards (ICSCs), the most authoritative source here.
Value As written Source
– Solubility: 54.480 lb/100 lb water /Heptahydrate/ [4] Hazardous Substances Data Bank (HSDB)cites U.S. Coast Guard, Department of Transportation. CHRIS - Hazardous Chemical Data. Volume II. Washington, D.C.: U.S. Government Printing Office, 1984-5.
– In water solubility, 101 g/100 g water at 70 °C [4] Hazardous Substances Data Bank (HSDB)cites Kirk-Othmer Encyclopedia of Chemical Technology. 4th ed. Volumes 1: New York, NY. John Wiley and Sons, 1991-Present., p. V25: 843 (1998)
–shown Solubility in water, g/100ml at 20 °C: 22 (good) [3] ILO-WHO International Chemical Safety Cards (ICSCs)
log P: -0.07[3]

Value	As written	Source
–shown	Anhydrous zinc sulfate is a colorless crystalline solid. Zinc sulfate is also obtained as a hexahydrate, ZnSO4.6H2O, and as a heptahydrate ZnSO4.7H2O. All forms are soluble in water. All are noncombustible. The primary hazard is the threat posed to the environment. Immediate steps should be taken to limit its spread to the environment. It is used in the production of rayon, as a feed supplement, and as a fertilizer ingredient.	[1] CAMEO Chemicals
–	CBI; Large Crystals; Other Solid; Wet Solid; Dry Powder; Liquid; Other Solid; Liquid; Dry Powder; Large Crystals	[2] EPA Chemical Data Reporting (CDR)
–	COLOURLESS HYGROSCOPIC CRYSTALS.	[3] ILO-WHO International Chemical Safety Cards (ICSCs)

Value	As written	Source
–	1.96 at 68 °F (USCG, 1999) - Denser than water	[1] CAMEO Chemicalscites U.S. Coast Guard. 1999. Chemical Hazard Response Information System (CHRIS) - Hazardous Chemical Data. Commandant Instruction 16465.12C. Washington, D.C.: U.S. Government Printing Office.
–	3.8 g/cm³	[3] ILO-WHO International Chemical Safety Cards (ICSCs)
–shown	3.74 @ 15°C	[5] PAC Chemical Database, U.S. Department of Energy

Value	As written	Source
–	Solubility: 54.480 lb/100 lb water /Heptahydrate/	[4] Hazardous Substances Data Bank (HSDB)cites U.S. Coast Guard, Department of Transportation. CHRIS - Hazardous Chemical Data. Volume II. Washington, D.C.: U.S. Government Printing Office, 1984-5.
–	In water solubility, 101 g/100 g water at 70 °C	[4] Hazardous Substances Data Bank (HSDB)cites Kirk-Othmer Encyclopedia of Chemical Technology. 4th ed. Volumes 1: New York, NY. John Wiley and Sons, 1991-Present., p. V25: 843 (1998)
–shown	Solubility in water, g/100ml at 20 °C: 22 (good)	[3] ILO-WHO International Chemical Safety Cards (ICSCs)

Each value as its source reports it, with the source's number after it (listed under References). Where several sources report a property, the row shows the value most of them agree on, the rule the app uses; open the values to see every one.

Calculated

Heavy atoms: 6
Rings: 0
Aromatic rings: 0
Fraction sp³ carbons (Fsp3): 0
H-bond donors: 0
H-bond acceptors: 4
Rotatable bonds: 0
TPSA (Å²): 80.3 computed here · PubChem 88.6
Formal charge: 0
Complexity: 62 PubChem
Stereocenters: None
Double-bond geometry: None specified
Point group: Td of one 3D conformer with its hydrogens, by Athanor’s engine (as in the app)

Elemental analysis

O39.64%
S19.86%
Zn40.50%

Isotope pattern

Each peak is a nominal mass with its abundance-weighted exact mass, as a percentage of the tallest, from IUPAC natural isotope abundances.

Computed from the structure with RDKit 2026.09 when this page was built, beside PubChem's own computed values from its record; where the two differ, both are shown.

Predicted

log P: -1.34 Crippen (Wildman and Crippen 1999)
log S (water solubility): 0 ESOL (Delaney 2004), log mol/L
Synthetic accessibility: 4.35 SA score, 1 easy to 10 hard (Ertl and Schuffenhauer 2009)

Drug-likeness: Lipinski’s rule of five

Molecular weight ≤ 500: 161.45
log P ≤ 5 (Crippen): -1.34
H-bond donors ≤ 5: 0
H-bond acceptors ≤ 10: 4

Passes all four rules.

Predictions, not measurements; each names its method. A measured log P, where a source reports one, is under Physical properties.

Safety

Danger

Harmonized EU classification (CLP Annex VI). Source [6].

Corrosive
Harmful or irritant
Environmental hazard

H302Harmful if swallowed
H318Causes serious eye damage
H400Very toxic to aquatic life
H410Very toxic to aquatic life with long lasting effects

Precautionary statements: P264, P264+P265, P270, P273, P280, P301+P317, P305+P354+P338, P317, P330, P391, P501

View all classifications (3)

[6] Regulation (EC) No 1272/2008 of the European Parliament and of the Council · DangerH302, H318, H400, H410
[7] European Chemicals Agency (ECHA)This chemical does not meet GHS hazard criteria for 0.1% (1 of 928) of reports.
[7] European Chemicals Agency (ECHA) · 928 reports · DangerH302, H318, H400, H410

Exposure limits

MAK (Maximale Arbeitsplatz Konzentration): (respirable fraction): 0.1 mg/m[3]

First aid

Inhalation: Move to fresh air. Ingestion: Induce vomiting, followed by prompt and complete gastric lavage, cathartics, and demulcents. EYES or skin: Flush with water. (USCG, 1999)[1]
Fresh air, rest. Seek medical attention if you feel unwell.[3]
Rinse skin with plenty of water or shower.[3]
Rinse with plenty of water for several minutes (remove contact lenses if easily possible).[3]

Storage

Dry. Provision to contain effluent from fire extinguishing. Store in an area without drain or sewer access.[3]
Zinc sulfate ophthalmic solutions should be stored in tightly closed containers at temperatures not exceeding 40 °C, freezing should be avoided.[4]
Finely divided ... Zinc compounds, can be fire and explosion hazard if stored in damp places, sources of spontaneous combustion. (zinc cmpd)[4]
There is ... (a) tendency for solutions of zinc sulfate to form slight cloudiness due to seperation of basic salt formed through partial hydrolysis.[4]

Safety data sheets on the supplier’s page: BenchChem, BLD Pharm, Clearsynth.

Always read the supplier’s safety data sheet before working with it.

Spectra

Experimental spectra held by these sources; each link opens the source's own record.

Literature

Reading PubChem, OpenAlex and GSRS…

Bioactivity

Reading ChEMBL…

References

[1]CAMEO Chemicals · Public domain (NOAA) · via PubChem · retrieved 2026-10-14
[2]EPA Chemical Data Reporting (CDR) · Public domain (US EPA) · via PubChem · retrieved 2026-10-14
[3]ILO-WHO International Chemical Safety Cards (ICSCs) · CC BY 4.0 · via PubChem · retrieved 2026-10-14
[4]Hazardous Substances Data Bank (HSDB) · Public domain (US NLM) · via PubChem · retrieved 2026-10-14
[5]PAC Chemical Database, U.S. Department of Energy · Public domain (US DOE) · via PubChem · retrieved 2026-10-14
[6]Regulation (EC) No 1272/2008 of the European Parliament and of the Council · EU reuse policy, CC BY 4.0 · via PubChem · retrieved 2026-10-14
[7]European Chemicals Agency (ECHA) · ECHA legal notice: reuse with acknowledgement · via PubChem · retrieved 2026-10-14
[8]SpectraBase · Linked only · via PubChem · retrieved 2026-10-14
·Calculated values: computed by Athanor with RDKit 2026.09 from the structure.
·Literature on PubChem

Data last updated 2026-10-14.