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| CAS No.: | 142-71-2 |
|---|---|
| Name: | Cupric acetate |
| Molecular Structure: | |
|
|
|
| Formula: | C4H6CuO4 |
| Molecular Weight: | 363.27 |
| Synonyms: | Aceticacid, copper(2+) salt (8CI,9CI);Copper acetate (Cu(OAc)2) (7CI);Acetic acidcupric salt;Copper acetate (Cu(C2H3O2)2);Copper acetate(Cu(MeCO2)2);Copper diacetate;Copper(2+) acetate;Copper(2+) diacetate;Copper(II) acetate;Crystallized verdigris;Crystals of Venus;Cupric diacetate;Neutral verdigris;Venus copper; |
| EINECS: | 205-553-3 |
| Density: | 1.068g/cm3 |
| Melting Point: | 115 °C |
| Boiling Point: | 117.1 °C at 760 mmHg |
| Flash Point: | 40 °C |
| Solubility: | Soluble in water and alcohol. Slightly soluble in ether and glycerol. |
| Appearance: | Green crystalline powder |
| Hazard Symbols: |
 Xn,  N
|
| Risk Codes: | 22-36/37/38-50/53 |
| Safety: | 26-60-61 |
| Transport Information: | UN 3077 9/PG 3 |
| PSA: | 37.30000 |
| LogP: | 0.08840 |
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| Conditions | Yield |
|---|---|
| In acetic anhydride reflux; washed with acetic anhydride and ether;; | 93% |
| In acetic anhydride reflux; washed with acetic anhydride and ether;; | 93% |
| In neat (no solvent) on warming;; | |
| In neat (no solvent) on warming;; |
| Conditions | Yield |
|---|---|
| In dichloromethane N2, acid added at room temp.; | A n/a B 85% |
| Conditions | Yield |
|---|---|
| With copper(II) nitrate at 30 - 35℃; |
| Conditions | Yield |
|---|---|
| With copper(II) nitrate |
- 142-71-2
copper diacetate
- 142-71-2
copper diacetate
| Conditions | Yield |
|---|---|
| With toluene azeotrope Destillation; |
- 142-71-2
copper diacetate
| Conditions | Yield |
|---|---|
| In neat (no solvent, solid phase) byproducts: H2O; acetate was heated in vac. at 150°C for 3 h; |
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History
Copper(II) acetate (CAS NO.142-71-2) is occasionally the primary component of verdigris, the blue-green substance that forms on copper during long exposures to atmosphere. It was historically prepared in vineyards, since acetic acid is a byproduct of fermentation.Copper (cupric) acetate tablets were believed to repel sharks in the mid twentieth century.
Consensus Reports
Reported in EPA TSCA Inventory. Copper and its compounds are on the Community Right-To-Know List.
Standards and Recommendations
ACGIH TLV: TWA 1 mg(Cu)/m3
Specification
The IUPAC name of this chemical is copper diacetate. With the CAS registry number 142-71-2, it is also named as Acetate de cuivre. The product's categorie is organic-metal salt. It is green crystalline powder which is soluble in water and ethanol, slightly soluble in ether and glycerol. In addition, it is highly toxic and the storage environment should be ventilate, low-temperature and dry. Keep Copper(II) acetate separate from acids.
The other characteristics of this product can be summarized as: (1)ACD/LogP: -0.29; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -1.07; (4)ACD/LogD (pH 7.4): -2.86; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 2.73; (8)ACD/KOC (pH 7.4): 1; (9)#H bond acceptors: 2; (10)#H bond donors: 1; (11)#Freely Rotating Bonds: 0; (12)Flash Point: 40 °C; (13)Enthalpy of Vaporization: 23.7 kJ/mol; (14)Boiling Point: 117.1 °C at 760 mmHg; (15)Vapour Pressure: 13.9 mmHg at 25°C; (16)Exact Mass: 180.95621; (17)MonoIsotopic Mass: 180.95621; (18)Topological Polar Surface Area: 80.3; (19)Heavy Atom Count: 9; (20)Complexity: 25.5.
Preparation of Copper(II) acetate: It has been synthesized for centuries by the method described in the history section. The overall reaction is as follows:
2 CuSO4.5H2O + 4 NH3 + 4 C2H4O → Cu2(OAc)4(H2O)2 + 2 (NH4)2SO4 + 8 H2O
The hydrate form can be dehydrated by heating at 100 °C in a vacuum:
Cu2(OAc)4(H2O)2 → Cu2(OAc)4 + 2 H2O
Heating a mixture of anhydrous Cu2(OAc)4 and copper metal affords colorless, volatile cuprous acetate:
2 Cu + Cu2(OAc)4 → 4 CuOAc
Uses of Copper(II) acetate: It is used as an insecticide, in the preparation of other chemicals, as a fungicide, and mildew preventive, fungicides, printing and dyeing fixing agent. And it also has been used as intermediate to prepare Paris green.
When you are using this chemical, please be cautious about it as the following:
It is not only harmful if swallowed, but also irritating to eyes, respiratory system and skin. And it is also very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. This material and its container must be disposed of as hazardous waste. Additionally, people should avoid release to the environment.
People can use the following data to convert to the molecule structure.
1. SMILES:[Cu+2].[O-]C(=O)C.[O-]C(=O)C
2. InChI:InChI=1/2C2H4O2.Cu/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2
3. InChIKey:OPQARKPSCNTWTJ-NUQVWONBAO
The following are the toxicity data which has been tested.
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| mouse | LD50 | intraperitoneal | 2500ug/kg (2.5mg/kg) | Biochemical Pharmacology. Vol. 30, Pg. 771, 1981. | |
| mouse | LD50 | intravenous | 20mg/kg (20mg/kg) | BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD | Indian Journal of Pharmacology. Vol. 23, Pg. 153, 1991. |
| mouse | LD50 | oral | 196mg/kg (196mg/kg) | BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD | Indian Journal of Pharmacology. Vol. 23, Pg. 153, 1991. |
| rabbit | LDLo | oral | 250mg/kg (250mg/kg) | Journal of Medical Research. Vol. 42, Pg. 461, 1919. | |
| rat | LD50 | intraperitoneal | 14700ug/kg (14.7mg/kg) | BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD | Indian Journal of Pharmacology. Vol. 23, Pg. 153, 1991. |
| rat | LD50 | intravenous | 17100ug/kg (17.1mg/kg) | BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD | Indian Journal of Pharmacology. Vol. 23, Pg. 153, 1991. |
| rat | LD50 | oral | 501mg/kg (501mg/kg) | BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD | Indian Journal of Pharmacology. Vol. 23, Pg. 153, 1991. |
| rat | LD50 | subcutaneous | 350mg/kg (350mg/kg) | MUSCULOSKELETAL: JOINTS | Progress in Medical Chemistry. Vol. 15, Pg. 211, 1977. |