Disilver oxide
Silver oxide
CAS: 20667-12-3;11113-88-5
Molecular Formula: Ag2O
Disilver oxide - Names and Identifiers
| Name | Silver oxide |
| Synonyms | Silver oxide Silver(Ⅰ)Oxide Oxydisilver(I) Disilver oxide Argentous oxide SILVER OXIDE pure disilver oxygen(-2) anion Silver(I) oxide (metals basis) |
| CAS | 20667-12-3 11113-88-5 |
| EINECS | 243-957-1 |
| InChI | InChI=1/2Ag.O/q2*+1;-2 |
| InChIKey | KHJDQHIZCZTCAE-UHFFFAOYSA-N |
Disilver oxide - Physico-chemical Properties
| Molecular Formula | Ag2O |
| Molar Mass | 231.74 |
| Density | 7,143 g/cm3 |
| Melting Point | 300°C (dec.) |
| Water Solubility | slightly soluble |
| Appearance | Powder/Solid |
| Specific Gravity | 7.22 |
| Color | Dark-brown |
| Merck | 14,8521 |
| Storage Condition | Store below +15°C. |
| Stability | Stable. Oxidiser. Incompatible with most common metals, ammonia, magnesium, many organic materials. |
| Sensitive | Light Sensitive |
| Physical and Chemical Properties | Brown cubic crystalline or brown-black heavy powder. melting point 230 ℃ relative density 7.22 solubility: soluble in acid, ammonia, alcohol, slightly soluble in water. |
| Use | Used in medical treatment and as glass polishing agent, colorant, water purification agent |
Disilver oxide - Risk and Safety
| Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R8 - Contact with combustible material may cause fire R34 - Causes burns R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R41 - Risk of serious damage to eyes |
| Safety Description | S17 - Keep away from combustible material. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S60 - This material and its container must be disposed of as hazardous waste. S39 - Wear eye / face protection. |
| UN IDs | UN 1479 5.1/PG 2 |
| WGK Germany | 2 |
| RTECS | VW4900000 |
| FLUKA BRAND F CODES | 8 |
| TSCA | Yes |
| HS Code | 28432900 |
| Hazard Class | 5.1 |
| Packing Group | II |
| Toxicity | LD50 orally in rats: 2.82 g/kg (Smyth) |
Disilver oxide - Upstream Downstream Industry
| Raw Materials | Phosphoric acid Sodium hydroxide Nitric acid Silver nitrate Silver atomic absorption standard solution |
Disilver oxide - Nature
Open Data Verified Data
brown-black heavy powder. Tasteless. d:57. 22. See Light heating can be gradually decomposed into silver and oxygen. Can absorb carbon dioxide in the air. Soluble in dilute nitric acid, ammonia, potassium cyanide solution, slightly soluble in sodium hydroxide solution, soluble in 40000 water, the aqueous solution is alkaline. Insoluble in ethanol. Under alkaline conditions, the formaldehyde solution can reduce the silver oxide to metallic silver. Decomposition began at about 200 °c.
Last Update：2025-06-10 22:55:16
Disilver oxide - Preparation Method
Open Data Verified Data
A sodium hydroxide solution was added to the silver nitrate solution to precipitate a silver oxide precipitate. The precipitate is washed with carbon dioxide-free water, suction filtered, and dried in dry air without carbon dioxide to obtain pure silver oxide.
Last Update：2025-06-10 22:55:16
Disilver oxide - Application
Open Data Verified Data
used as an analytical reagent, a preservative, and a catalyst. In organic synthesis, electronic devices, glass industry also has a wide range of applications.
Last Update：2025-08-19 16:24:40
Disilver oxide - Safety
Open Data Verified Data
rat oral LDso:2.82g/kg. Store in a dry, cool, light-shielded warehouse. To prevent moisture, light-shielding sealed preservation. With organic matter, acetylene, ammonia, hydrogen peroxide, piperazine, acids, bases and easy oxide Isolation storage and transportation.
Last Update：2025-06-10 22:55:16
Disilver oxide - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| solubility in water (g/100ml) | grams dissolved per 100ml of water: 1.3 × 10-3/20 ℃ |
| Use | used in pharmaceutical and organic synthesis, used as polishing agent, colorant for glass, battery plate, used as oxidant, analytical reagent and preservative used in medical treatment and used as glass polishing agent, colorant, water purification agent mainly used as chemical synthesis catalyst. Also used as preservatives, electronic device materials, glass colorants and abrasives. silver oxide is an electrode material for silver oxide batteries. It is also a weak oxidant and weak base in organic synthesis, which can react with 1, 3-disubstituted imidazolium salts and benzimidazolium salts to form nitrogen heterocyclic carbenes, transition metal carbene complexes can be synthesized as carbene transfer reagents instead of the unstable ligand cyclooctadiene or acetonitrile. In addition, the silver oxide can convert organic bromides and chlorides into alcohols at low temperatures and in the presence of water vapor, and the benzyl halide is converted into benzyl ether, which is used in combination with methyl iodide as a methylation reagent, for use in carbohydrate methylation analysis and in Hoffmann elimination reactions, and oxidation of aldehydes to carboxylic acids. It also acts as a surface catalyst for the epoxidation of alkenes.. |
| production method | silver nitrate method silver nitrate solution reacts with sodium hydroxide solution to produce silver oxide by washing, separation, the final product was obtained by drying. The reaction formula is: 2AgNO3 2NaOH → Ag2O 2NANO3 H2O |
| category | oxidant |
| toxicity grade | low toxicity |
| Acute toxicity | oral-rat LD50:2820 mg/kg; Oral-mouse LD50:1027 mg/kg |
| explosive hazard characteristics | mixed explosive with organic and oxide |
| flammability hazard characteristics | light decomposition of oxygen, easily flammable |
| storage and transportation characteristics | warehouse ventilation and low temperature drying; With fuel, organic matter, easy oxides, sulfur, separate storage of phosphorus |
| fire extinguishing agent | water and sand |
| Occupational Standards | TLV-TWA 0.01 mg (aluminum)/m3; Tel 0.03 mg (aluminum)/M3 |
Last Update：2024-04-09 19:55:45
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Raw Materials for Disilver oxide