Name | Cadmium oxide |
Synonyms | oxocadmium CadiuM oxide Cadmium oxide Cadmium monoxide oxygen(-2) anion cadmium(+2) cation Cadmium oxide fume Cadmium oxide, extra pure CADMIUM OXIDE EXTRA PURE 5 KG Cadmium oxide, Puratronic (metals basis) 7-chloro-N-methyl-5-phenyl-3H-1,4-benzodiazepin-2-amine 4-oxide |
CAS | 1306-19-0 |
EINECS | 215-146-2 |
InChI | InChI=1/C16H14ClN3O/c1-18-15-10-20(21)16(11-5-3-2-4-6-11)13-9-12(17)7-8-14(13)19-15/h2-9H,10H2,1H3,(H,18,19) |
Molecular Formula | CdO |
Molar Mass | 128.41 |
Density | 8.15g/mLat 25°C(lit.) |
Melting Point | 900°C |
Boling Point | 1385 °C |
Flash Point | 285.85°C |
Water Solubility | insoluble. |
Solubility | 0.0021g/l |
Vapor Presure | 0mmHg at 25°C |
Appearance | powder |
Specific Gravity | 8.15 |
Color | brown |
Odor | Odorless |
Exposure Limit | ACGIH: TWA 0.01 mg/m3; TWA 0.002 mg/m3NIOSH: IDLH 9 mg/m3 |
Merck | 14,1623 |
PH | 9-10 (H2O)(aqueous suspension) |
Storage Condition | Store below +30°C. |
Stability | Stable. Incompatible with magnesium. |
Refractive Index | 1.649 |
Physical and Chemical Properties | Properties at room temperature for brown red to brown black amorphous powder or cubic fine crystals. melting point> 1500 ℃ boiling point 900~1000 ℃ (decomposition) relative density 6.95 (amorphous) soluble in acid, ammonia and ammonium salt solution, insoluble in water and alkali. |
Use | For the preparation of metal cadmium and cadmium salts, and used as catalysts, ceramic pigments, cadmium plating solution |
Risk Codes | R49 - May cause cancer by inhalation R22 - Harmful if swallowed R48/23/25 - R68 - Possible risk of irreversible effects R63 - Possible risk of harm to the unborn child R62 - Possible risk of impaired fertility R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R26 - Very Toxic by inhalation R45 - May cause cancer |
Safety Description | S53 - Avoid exposure - obtain special instructions before use. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 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. |
UN IDs | UN 2570 6.1/PG 3 |
WGK Germany | 2 |
RTECS | EV1925000 |
TSCA | Yes |
HS Code | 2825 90 60 |
Hazard Class | 6.1 |
Packing Group | III |
Toxicity | LC50 in rats, monkeys (mg/m3): 500, ~15000 (Barrett) |
Raw Materials | Diesel oil |
brown-red to brown-black amorphous powder or cubic crystals. Odorless. The crystalline density is 6.95; The amorphous powder density is 1500. The melting point is greater than °c. Insoluble in water, alkali, soluble in dilute acid, ammonia. An explosion may occur when the mixture with magnesium is heated. By high heat decomposition, release of toxic smoke. Reactions occur in contact with sulfur, selenium, and zinc. Hydrogen gas is generated by contact with an acid. With most oxidants such as chlorate, nitrate, perchlorate or permanganate composition of explosive properties of very sensitive compounds. By high heat decomposition of toxic gases.
metal cadmium oxidation method: cadmium waste was added to water and sulfuric acid, and stirred and reacted to produce cadmium sulfate. The resulting crude solution was controlled at a concentration of 20-25 °c and a pH of about 2-4. After pressure filtration of the crude solution, the filtrate was sent to an oxidation tank, and hydrogen peroxide or potassium permanganate was added at 80-90 ° C. To remove iron by oxidation (pH was maintained at 5.4). After the oxidation of the solution at 70~80 deg C, with zinc skin replacement of cadmium sulfate, so that cadmium in the form of sponge self-surfacing. The separated sponge cadmium is washed with water and washed with acid to remove zinc, and then filtered after repeated washing with water. When the surface moisture of the obtained sponge cadmium is completely removed, it is added to the oxidation furnace, and the oxidation is carried out at 300 to 400 ° C., and the cadmium oxide product is obtained by crushing and sieving.
electroplating industry is used for the preparation of copper plating bath; Inorganic industry is used for the preparation of various cadmium salts; Organic synthesis is used for the manufacture of catalysts, battery Industry electrode I pigment for the manufacture of storage batteries the industry is used for the manufacture of cadmium pigments; The metallurgical industry is used for the manufacture of various alloys such as hard steel alloys, printed alloys, etc.
mouse oral LD50:72mg.kg-1. It has a stimulating effect on the eyes, skin, mucous membranes and upper respiratory tract. Inhalation can cause chemical Pneumonia and pulmonary edema. Store in a cool, ventilated room. Keep the container sealed. It should be stored separately from oxidant, acids and edible chemical raw materials. It cannot be mixed with food, food, seed and feed.
crystal Structure | Cubic, Halite Structure - Space Group Fm3m |
NIST chemical information | information provided by: webbook.nist.gov (external link) |
EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
toxicity | when acute poisoning is caused by dust or smoke, there will be pain, dizziness, weakness, Nausea, upper abdominal pain, and cause bronchitis, bronchitis, pulmonary edema, chest pain, Arthralgia, heart enlargement, hepatomegaly, hematemesis and bloody Diarrhea. Severe death due to pulmonary edema or Pneumonia. Chronic poisoning, will reduce the sense of smell until disappeared, causing cadmium rhinitis, tooth neck and gums become golden yellow (cadmium ring), Head Pain dizziness, loss of appetite, stomach pain Nausea, Vomit, weight loss, urine protein, nasal bleeding, mucous membrane chapped, chronic pharyngolaryngitis, emphysema, progressive pulmonary sclerosis, liver and kidney damage, and accompanied by obvious neurasthenia and autonomic neurosis, but also can cause osteoporosis, severe cases cause loss of Labor ability. In case of poisoning, immediately move the poisoned person to the fresh air, be as quiet and warm as possible. If the respiratory tract has symptoms, the patient should inhale the hot and humid 2% sodium bicarbonate solution and give the hot milk of soda or alkaline mineral water. And for a variety of symptoms of drug treatment. The maximum allowable concentration is 0.1 mg/m3. The combustion of finely divided dust in the air of the workshop should be prevented. Workers who produce and use cadmium and its compounds should undergo regular physical examinations. |
Use | for the preparation of metal cadmium and cadmium salts, and used as catalysts, ceramic pigments, cadmium electroplating solution, etc. used in Cadmium electroplating solution, cadmium electrode, photoelectric cell, gamma ray photography, ceramic glaze pigment, alloy manufacturing in metallurgical industry, and used as raw material and catalyst for cadmium salt and cadmium reagent. used as catalyst, also used in the preparation of high purity cadmium salt organic reaction catalyst, manufacturing other cadmium salt, phosphor, semiconductor, manufacturing silver alloy, battery electrode, ceramic glaze, electrical contacts. |
production method | cadmium metal oxidation method cadmium-containing waste is added to water and sulfuric acid, stirred and reacted to generate cadmium sulfate. The resulting crude solution was controlled at a concentration of 20 to 25 ° Bé and a pH of about 2 to 4. After pressure filtration of the crude solution, the filtrate was sent to an oxidation tank, and hydrogen peroxide or potassium permanganate was added at 80-90 ° C. To remove iron by oxidation (pH was maintained at 5.4). After the oxidation of the solution at 70~80 deg C, with zinc skin replacement of cadmium sulfate, so that cadmium in the form of sponge self-surfacing. The separated sponge cadmium is washed with water and washed with acid to remove zinc, and then filtered after repeated washing with water. When the surface moisture of the obtained sponge cadmium is completely removed, it is added to the oxidation furnace, and the oxidation is carried out at 300 to 400 ° C., and the cadmium oxide product is obtained by crushing and sieving. CdO H2SO4 → CdSO4 H2OCdSO4 Zn → ZnSO4 Cd;2Cd O2 → 2CdO |
category | toxic substances |
toxicity grade | high toxicity |
Acute toxicity | oral-rat LD50: 72 mg/kg; Oral-mouse LD50: 67 mg/kg |
explosive hazard characteristics | heating explosion of cadmium-magnesium mixture |
flammability hazard characteristics | toxic cadmium smoke from thermal decomposition |
storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; Stored separately from food raw materials |
fire extinguishing agent | water, dry powder, foam, carbon dioxide |
Occupational Standard | TWA 0.05 mg (cadmium)/m3; Tel 0.15 mg (cadmium)/M3 |
toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
immediate life-and health-threatening concentrations | 9 mg Cd/m3[Unc h] |