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Home> Encyclopedia >Other Inorganic Salts>Organic Intermediate>Food Additives
Zinc acetate structure
Zinc acetate structure

Zinc acetate

Iupac Name:zinc;diacetate;dihydrate
CAS No.: 557-34-6
Molecular Weight:125.43200
Modify Date.: 2022-10-28 09:16
Introduction: Zinc acetate (chemical formula: Zn(O2CCH3)2) is a kind of salt commonly existing in the dihydrate form. It appears as colorless solid. It is produced through the reaction between zinc oxide with acetate acid. Given that zinc is an essential element for growth and development of human body, zinc acetate can be used as a dietary supplement for the treatment of zinc deficiency. It plays an important role for the synthesis of cholesterol, protein, and fats. It can also be used as an astringent, styptic and emetic. In industry, it has various kinds of applications including wood preservation, manufacturing of other zinc salts as well as ethylene acetate, being used as a dye mordant, and analytical reagent. View more+
1. Names and Identifiers
1.1 Name
Zinc acetate
1.2 Synonyms

Acetic acid, zinc salt (2:1) Acetic acid, zinc(II) salt Acetic acid,zinc salt Acetic acid,zinc(II) salt aceticacid,zinc(ii)salt ai3-04465 Commercial zine acetate Dicarbomethoxyzinc EINECS 209-170-2 Galzin MFCD00012454 Zinc acetate anhydrous zinc acetate solution Zinc di(acetate) Zinc diacetate zinc diethanoate zinc(+2) cation diacetate zinc(ii) acetate zinc,diacetate Zinkdi(acetat) Zn(CH3COO)2

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1.3 CAS No.
557-34-6
1.4 CID
11192
1.5 EINECS(EC#)
209-170-2
1.6 Molecular Formula
C4H6O4Zn (isomer)
1.7 Inchi
InChI=1S/2C2H4O2.Zn/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2
1.8 InChIkey
DJWUNCQRNNEAKC-UHFFFAOYSA-L
1.9 Canonical Smiles
CC(=O)[O-].CC(=O)[O-].[Zn+2]
1.10 Isomers Smiles
CC(=O)[O-].CC(=O)[O-].[Zn+2]
2. Properties
2.1 Density
1.84
2.1 Melting point
83-86ºC
2.1 Boiling point
242-4ºC
2.1 Flash Point
12ºC
2.1 Precise Quality
123.95000
2.1 PSA
98.72000
2.1 logP
0.08840
2.1 Appearance
Colourless or white efflorescent crystals
2.2 Storage
Hygroscopic. Ambient temperatures.
2.3 Chemical Properties
White crystalline powder
2.4 Color/Form
Exists in two crystalline forms, alpha (wurtzite) and beta (sphalerite)
White to grayish-white or yellowish powder colorless cubic crystals
2.5 Decomposition
When heated to decomposition it emits toxic fumes of /zinc oxide/.
2.6 Water Solubility
Insol in alkalies; sol in dil mineral acids
2.7 Stability
Stable. Incompatible with alkalies, strong oxidizing agents.
2.8 StorageTemp
Inert atmosphere,Room Temperature
3. Use and Manufacturing
3.1 Definition
ChEBI: An acetate salt in which the cationic component is zinc(2+).
3.2 Produe Method
Zinc acetate is synthesized by reacting zinc oxide with glacial aceticacid, with subsequent crystallization, separation by centrifugation,and drying and milling of the crystals. No organic solvents are usedduring the synthesis.
3.3 Usage
Zinc acetate is produced from acetic acid and zinc oxide. It isused for preserving wood, manufacturing glazers for paintingon porcelain; as a reagent in testing for albumin, tannin,phosphate; as cross-linking agents for polymers; in tobaccosmoke filters; and as a topical fungicide. Zinc acetate is anindirect food additive for use only as a component ofadhesives.
4. Safety and Handling
4.1 Symbol
GHS07;GHS09;
4.1 Hazard Codes
Xi
4.1 Signal Word
Warning
4.1 Risk Statements
R36
4.1 Safety Statements
S26-S39
4.1 Exposure Standards and Regulations
Zinc acetate is an indirect food additive for use only as a component of adhesives.
Trace minerals added to animal feeds as nutritional dietary supplements are generally recognized as safe when added at levels consistent with good feeding practice. Zinc acetate is included on this list.
The Approved Drug Products with Therapeutic Equivalence Evaluations List identifies currently marketed prescription drug products, incl zinc acetate, approved on the basis of safety and effectiveness by FDA under sections 505 of the Federal Food, Drug, and Cosmetic Act.
Drug products containing certain active ingredients offered over-the-counter (OTC) for certain uses. A number of active ingredients have been present in OTC drug products for various uses, as described below. However, based on evidence currently available, there are inadequate data to establish general recognition of the safety and effectiveness of these ingredients for the specified uses: zinc acetate is included in skin protectant drug products (wound healing claims only).
Drug products containing certain active ingredients offered over-the-counter (OTC) for certain uses. A number of active ingredients have been present in OTC drug products for various uses, as described below. However, based on evidence currently available, there are inadequate data to establish general recognition of the safety and effectiveness of these ingredients for the specified uses: zinc acetate is included in diaper rash products.
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4.2 Other Preventative Measures
If material not on fire and not involved in fire: Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Keep up wind. Avoid breathing vapors or dusts. Wash away any material which may have contacted the body with copious amounts of water or soap and water.
SRP: The scientific literature for the use of contact lenses in industry is conflicting. The benefit or detrimental effects of wearing contact lenses depend not only upon the substance, but also on factors including the form of the substance, characteristics and duration of the exposure, the uses of other eye protection equipment, and the hygiene of the lenses. However, there may be individual substances whose irritating or corrosive properties are such that the wearing of contact lenses would be harmful to the eye. In those specific cases, contact lenses should not be worn. In any event, the usual eye protection equipment should be worn even when contact lenses are in place.
Prevention ... /of metal fume fever/ is a matter of keeping exposure of workers below level of concn currently accepted as satisfactory for working with the metal in industry, preferably by employment of proper local exhaust ventilation to collect fumes at their source. Acceptable respirators are avail commercially but should be used only under suitable conditions. /Zinc/
In all cases where zinc is heated to the point where fume is produced, it is most important to ensure that adequate ventilation is provided. Individual protection is best ensured by education of the worker concerning metal-fume fever & the provision of local exhaust ventilation, or, in some situations by wearing of supplied-air hood or mask.
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4.3 Hazard Class
9
4.3 Hazard Declaration
H302; H319; H410
4.3 Cleanup Methods
Environmental considerations: Land spill: Dig a pit, pond, lagoon, or holding area to contain liquid or solid material. /SRP: If time permits, pits, ponds, lagoons, soak holes, or holding areas should be contained with a flexible impermeable membrane liner./ Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water.
Environmental considerations: Water spill: Neutralize with agricultural lime (CaO), crushed limestone, or sodium bicarbonate. Add soda ash. Adjust pH to neutral (pH 7). Use mechanical dredges or lifts to remove immobilized masses of pollutants and precipitates or greater concentration.
4.4 DisposalMethods
SRP: The most favorable course of action is to use an alternative chemical product with less inherent propensity for occupational exposure or environmental contamination. Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider: the material's impact on air quality; potential migration in soil or water; effects on animal, aquatic, and plant life; and conformance with environmental and public health regulations.
Chemical Treatability of Zinc; Concentration Process: Ultrafiltration; Chemical Classification: Metals; Scale of Study: Continuous flow, pilot scale; Type of Wastewater Used: Industrial wastewater; Results of Study: 0.38 ppm effluent concentration. /Zinc/
Chemical Treatability of Zinc; Concentration Process: Miscellaneous sorbents; Chemical Classification: Metals; Scale of Study: Literature review; Type of Wastewater Used: Unknown; Results of Study: Final concentration reduced to 0.1 ppb; SiO2 + CaO slags used. /Zinc/
The proprietary Sulfex process (Permutit Co) has been applied to zinc wastes. The process involves addition of ferrous sulfide, which gradually releases sulfide to precipitate the zinc ... . /Zinc/
In the case where zinc removal is the only consideration and recovery is not warranted, removal by precipitation can be accomplished by standard pH adjustment through lime addition, precipitation and flocculation, and sedimentation, employing standard waste treatment equipment, operating data for existing chemical precipitation units indicate that levels of 1 mg/l or less of zinc are readily obtainable with lime precipitation, although assurance of consistent removal of precipitated zinc to lower levels from the effluent stream may require filtration. /Zinc/
Chemical Treatability of Zinc; Concentration Process: Chemical precipitation; Chemical Classification: Metals; Scale of Study: Literature review; Type of Wastewater Used: Unknown; Results of Study: 10.6% reduction by sedimentation. /Zinc/
Chemical Treatability of Zinc; Concentration Process: Biological Treatment; Chemical Classification: Metals; 1) Scale of Study: Literature review; Type of Wastewater Used: Unknown; Results of Study: 89% reduction; Activated sludge process. 2) Scale of Study: full scale; Type of Wastewater Used: domestic wastewater; Results of Study: 20-91% reduction achieved; Survey of municipal wastewater treatment plants. 3) Scale of Study: Continuous flow and pilot scale; Type of Wastewater Used: domestic wastewater; Results of Study: 13-14% reduction in primary treatment. 4) Scale of Study: Laboratory scale; Type of Wastewater Used: Synthetic wastewater; Results of Study: Biological growth inhibited; Study of nitrosomas bacteria. 5) Scale of Study: Continuous flow and full scale; Type of Wastewater Used: Domestic wastewater; Results of Study: 60% reduction; Activated sludge process. 6) Scale of Study: Laboratory scale; Type of Wastewater Used: Synthetic wastewater; Results of Study: Oxygen uptake inhibited. 7) Scale of Study: Literature review; Type of Wastewater Used: Unknown; Results of Study: 57% reduction; Activated sludge process. /Zinc/
Chemical Treatability of Zinc; Concentration Process: Chemical precipitation; Chemical Classification: Metals; 1) Scale of Study: Pilot scale; Type of Wastewater Used: Synthetic wastewater; Results of Study: 1% reduction with alum; 3 coagulants used: 220 ppm of alum at pH= 6.4. 40 ppm of ferric chloride at pH= 6.2; 415 ppm of lime at pH= 11.5; chemical coagulation was followed by dual media filtration. 2) Scale of Study: Laboratory scale, continuous flow; Type of Wastewater Used: Synthetic wastewater; Results of Study: 100% reduction with lime; Lime dose of 50 ppm added. 3) Scale of Study: Pilot scale; Type of Wastewater Used: Domestic wastewater and pure compound (one solute in a solvent) Results of Study: Iron system - 63% reduction, low lime system - 85% reduction; High lime system - 76% reduction; 3 coagulant systems were used: Iron system used 45 ppm as Fe of Fe2(SO4)3 at pH= 6.0. Low lime system used 20 ppm as Fe of Fe2 (SO4)3 and 260 ppm of CaO at pH= 10.0. High lime system used 600 ppm of CaO at pH= 11.5. Chemical coagulation was followed by multimedia filtration. 4) Scale of Study: Full scale, continuous flow; Type of Wastewater Used: Domestic wastewater; Results of Study: 90% reduction with lime (full scale); 37% reduction with lime (continuous flow); Lime dose of 350-400 ppm as calcium oxide at pH= 11.3. 5) Scale of Study: Literature review; Type of Wastewater Used: Unknown; Results of Study: 10.6% reduction by sedimentation. 6) Scale of Study: Literature review; Type of Wastewater Used: Unknown; Results of Study: 91.4% reduction with lime; Lime dose of 400 ppm added. /Zinc/
Chemical Treatability of Zinc; Concentration Process: Reverse osmosis; Chemical Classification: Metals; Scale of Study: Batch flow; Type of Wastewater Used: Pure compound (one solute in a solvent); Results of Study: 1) 96.6% reduction with C/PEI membrane at pH= 8.0 100% reduction with C/PEI membrane at pH= 11.0; CA membrane operated at 400 psig and 16-22 deg C. 2) Results of Study: 96.9%-99.5% reduction with CA membrane; CA membrane operated at 400 psig and 16-22% deg C. /Zinc/
Chemical Treatability of Zinc; Concentration Process: Activated carbon; Chemical Classification: Metals; Scale of Study: Full scale continuous flow; Type of Wastewater Used: (not stated); 1) Results of Study: 81% reduction; 124 ppb effluent concentration; Carbon used as advanced treatment of biologically and chemically treated wastewater. Plant capacity 0.66 cu m/sec. Data presented for two time periods. 2) Results of Study: 61% reduction; 162 ppb effluent concentration; Carbon used as advanced treatment of biologically and chemically treated wastewater. Plant capacity 0.66 cu m/sec. Data presented for two time periods. /Zinc/
Disposal procedures for spills include ferric hydroxide precipitation and cement-based fixation processes; the latter method is very effective in rendering zinc contaminants insoluble (Dawson and Mercer 1986). Unsalvageable zinc waste may be buried in an approved landfill while salvageable zinc is typically recycled.
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4.5 RIDADR
UN 3077 9/PG 3
4.5 Fire Fighting Procedures
If material on fire or involved in fire: Extinguish fire using agent suitable for type of surrounding fire. (Material does not burn or burns with difficulty.)
4.6 FirePotential
Not flammable
4.7 Formulations/Preparations
REAGENT, 99%; COMMERCIAL, 98.4%
USP, reagent, & technical grades /Dihydrate/
ACS, USP, technical, crystal grades; liquid grade, high purity, ready to use; crystal & anhydrous crystal form, technical grade
GALZIN, Zinc Acetate Capsules (25 mg zinc content) are #1 capsules with aqua blue opaque cap and body, imprinted "93-215." Packaged in bottles of 250 (NDC 57844-215-52). GALZIN, Zinc Acetate Capsules (50 mg zinc content) are #1 capsules with orange opaque cap and body, imprinted "93-208." Packaged in bottles of 250 (NDC 57844-208-52).
4.8 Incompatibilities
Zinc acetate is incompatible with oxidizing agents, zinc salts, alkalisand their carbonates, oxalates, phosphates, and sulfides.
4.9 WGK Germany
3
4.9 RTECS
ZG8750000
4.9 Protective Equipment and Clothing
... Recommended appropriate protective equipment including protective eyewear, long-sleeved shirts and long-legged pants, rubber gloves, and boots. /zinc salts/
/NISOH certified respirator/; Rubber gloves; Chemical goggles.
4.10 Reactivities and Incompatibilities
Incompatible with zinc salts, alkalies and their carbonates, oxalates, phosphates, and sulfides.
4.11 Skin, Eye, and Respiratory Irritations
Zinc salts of strong mineral acids are astringent, corrosive to skin ... /Zinc salts/
The dust is irritating to eyes, nose and throat. The solid is irritating to skin and eyes.
4.12 Sensitive
Hygroscopic
5. MSDS

2.Hazard identification

2.1 Classification of the substance or mixture

Acute toxicity - Oral, Category 4

Serious eye damage, Category 1

Hazardous to the aquatic environment, long-term (Chronic) - Category Chronic 2

2.2 GHS label elements, including precautionary statements

Pictogram(s)
Signal word

Danger

Hazard statement(s)

H302 Harmful if swallowed

H318 Causes serious eye damage

H411 Toxic to aquatic life with long lasting effects

Precautionary statement(s)
Prevention

P264 Wash ... thoroughly after handling.

P270 Do not eat, drink or smoke when using this product.

P280 Wear protective gloves/protective clothing/eye protection/face protection.

P273 Avoid release to the environment.

Response

P301+P312 IF SWALLOWED: Call a POISON CENTER/doctor/\u2026if you feel unwell.

P330 Rinse mouth.

P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

P310 Immediately call a POISON CENTER/doctor/\u2026

P391 Collect spillage.

Storage

none

Disposal

P501 Dispose of contents/container to ...

2.3 Other hazards which do not result in classification

none

7. Other Information
7.0 Usage
Zinc acetate anhydrous is used in the synthesis of layered Zn-arylphosphonates with potential application in sorption, ion exchange or catalysis. It is utilized in the ultrasonic preparation of zinc sulfide nanoparticles coated on silica particles. It is administered orally or parenterally as a nutritional supplement. It finds an application in the field of industries such as wood preservation, manufacturing other zinc salts, polymers, manufacture of ethylene acetate, as a dye mordant, and analytical reagent. It also acts as a plating inhibitor on primary water piping.
7.1 Merck
14,10128
7.2 Description
Zinc acetate (chemical formula: Zn(O2CCH3)2) is a kind of salt commonly existing in the dihydrate form. It appears as colorless solid. It is produced through the reaction between zinc oxide with acetate acid. Given that zinc is an essential element for growth and development of human body, zinc acetate can be used as a dietary supplement for the treatment of zinc deficiency. It plays an important role for the synthesis of cholesterol, protein, and fats. It can also be used as an astringent, styptic and emetic. In industry, it has various kinds of applications including wood preservation, manufacturing of other zinc salts as well as ethylene acetate, being used as a dye mordant, and analytical reagent.
7.3 References
https://en.wikipedia.org/wiki/Zinc_acetate
https://pubchem.ncbi.nlm.nih.gov/compound/Zinc_acetate_dihydrate#section=GHS-Classification
7.4 Description
Zinc acetate is the chemical compound with the formula Zn(O2CCH3)2, which commonly occurs as a dihydrate Zn(O2CCH3)2(H2O)2. Both the hydrate and the anhydrous forms are colorless solids that are commonly used in chemical synthesis and as dietary supplements. Zinc acetates are prepared by the action of acetic acid on zinc carbonate or zinc metal. When used as a food additive, it has the E number E650.
7.5 Chemical Properties
White crystalline powder
7.6 Chemical Properties
Zinc acetate occurs as white crystalline, lustrous plates with a faint acetic odor and an astringent taste.
7.7 Physical properties
The acetate group is capable of binding to metal ions in a variety of ways through its two oxygen atoms and several connectivities are observed for the various hydrates of zinc acetate. Anhydrous zinc acetate adopts a polymeric structure consisting of zinc coordinated to four oxygen atoms in a tetrahedral environment, each tetrahedron being connected to neighbors by the acetate groups . The acetate ligands are not bidentate. In contrast, most metal diacetates feature metals in octahedral coordination with bidentate acetate groups. In zinc acetate dihydrate the zinc is octahedral, wherein both acetate groups are bidentate.
2 - 5 - Heating pad
Heating Zn(CH3CO2)2 in a vacuum results in loss of acetic anhydride, leaving a residue of ""basic zinc acetate,"" with the formula Zn4O(CH3CO2)6. This cluster compound has the tetrahedral structure shown below. This species closely resembles the corresponding beryllium compound, although it is slightly expanded with Zn-O distances ~1.97 vs ~1.63 ? for Be4O(OAc)6.
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7.8 Uses
Zinc acetate is produced from acetic acid and zinc oxide. It is used for preserving wood, manufacturing glazers for painting on porcelain; as a reagent in testing for albumin, tannin, phosphate; as cross-linking agents for polymers; in tobacco smoke filters; and as a topical fungicide. Zinc acetate is an indirect food additive for use only as a component of adhesives.
7.9 Uses
Medicine (astringent), preserving wood, textile dyeing (mordant and resist), zinc chromate, laboratory reagent, cross-linking agent for polymers, ingredient of dietary supplements (up to 1 mg daily), feed additive, ceramic glazes.
7.10 Production Methods
Zinc acetate is synthesized by reacting zinc oxide with glacial acetic acid, with subsequent crystallization, separation by centrifugation, and drying and milling of the crystals. No organic solvents are used during the synthesis.
7.11 Definition
ChEBI: An acetate salt in which the cationic component is zinc(2+).
7.12 Preparation
Zinc acetate is prepared by the reaction of acetic acid with zinc oxide followed by crystallization (crystals of dihydrate obtained): ZnO + 2CH3COOH → (CH3COO)2Zn + H2O.
7.13 Application
3–1-Dietary and medicinal applications
Zinc acetate is used as a dietary supplement and in lozenges used to treat the common cold. Zinc acetate alone is thought to be a more effective treatment than zinc gluconate. Zinc acetate can also be used to treat zinc deficiencies. As an oral daily supplement it is used to inhibit the body's absorption of copper as part of the treatment for Wilson's disease. Zinc acetate is also sold as an astringent in the form of an ointment, a topical lotion; or combined with an antibiotic such as erythromycin for the topical treatment of acne. Furthermore Zinc acetate is commonly sold as a topical anti-itch ointment.
3–2-Industrial applications
Industrial applications include wood preserving, manufacturing other zinc salts, polymers, manufacture of ethylene acetate, as a dye mordant, and analytical reagent. Zinc acetate is a precursor via a sol-gel route to the transparent semi conductor zinc oxide.
7.14 Pharmaceutical Applications
Zinc acetate has been used as an excipient in a variety of pharmaceutical formulations including topical gels, lotions, and solutions, and subcutaneous injections. It has also been investigated for use in an oral controlled-release formulation for water-soluble drugs in combination with sodium alginate and xanthan gum.
Therapeutically, zinc acetate has been used in oral capsules for the treatment of Wilson’s disease. Zinc acetate has also been demonstrated to be effective as a spermicide in vaginal contraceptives.
7.15 Safety
Zinc acetate is used in topical pharmaceutical formulations and subcutaneous injections, where it is generally regarded as relatively nontoxic and nonirritant when used as an excipient. However, zinc acetate is poisonous by intravenous and intraperitoneal routes; it is also moderately toxic following oral consumption.
Zinc acetate:
LD50 (rat, oral): 2.510 g/kg
LD50 (mouse, IP): 0.057 g/kg
7.16 Veterinary Drugs and Treatments
Zinc sulfate is used systemically as a nutritional supplement in a variety of species. Oral zinc acetate has been shown to reduce copper toxicity in susceptible dog breeds (Bedlington Terriers, West Highland White Terriers) with hepatic copper toxicosis. Zinc therapy may also be of benefit in the treatment of hepatic fibrosis in the dog. Zinc sulfate is used topically as an astringent and as a weak antiseptic both for dermatologic and ophthalmic conditions.
7.17 storage
Zinc acetate loses water of hydration above 101℃. Zinc acetate should be stored in an airtight container in a cool, dry, place.
7.18 Incompatibilities
Zinc acetate is incompatible with oxidizing agents, zinc salts, alkalis and their carbonates, oxalates, phosphates, and sulfides.
7.19 Regulatory Status
Included in the FDA Inactive Ingredients Database (SC injections; topical lotions and solutions). Included in medicines licensed in the UK.
8. Computational chemical data
  • Molecular Weight: 125.43200g/mol
  • Molecular Formula: C4H6O4Zn
  • Compound Is Canonicalized: True
  • XLogP3-AA: null
  • Exact Mass: 181.955750
  • Monoisotopic Mass: 181.955750
  • Complexity: 25.5
  • Rotatable Bond Count: 0
  • Hydrogen Bond Donor Count: 0
  • Hydrogen Bond Acceptor Count: 4
  • Topological Polar Surface Area: 80.3
  • Heavy Atom Count: 9
  • Defined Atom Stereocenter Count: 0
  • Undefined Atom Stereocenter Count: 0
  • Defined Bond Stereocenter Count: 0
  • Undefined Bond Stereocenter Count: 0
  • Isotope Atom Count: 0
  • Covalently-Bonded Unit Count: 3
  • CACTVS Substructure Key Fingerprint: AAADcYBgOAAAAAACAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGgAAAAAAAACAgAACCAAAAAAIAACQCAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
9. Question & Answer
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11. Realated Product Infomation