1306-19-0

Cadmium fume (as Cd) is fi nely divided solid particles dispersed in air.

Brown crystals or brown amorphous powder. Used as an electroplating chemical and in the manufacture of cadmium electrodes. Is a component of silver alloys, phosphors, semiconductors, glass and ceramic glazes. Formerly used by veterinarians to kill worms and parasites.

CADMIUM OXIDE(1306-19-0) reacts violently with magnesium.

Insoluble in water.

Inhalation of vapor or fume may be fatal. A confirmed carcinogen.

Exposure to cadmium fume causes adverse health effects among occupational workers. The symptoms of toxicity and poisoning include, but are not limited to, pulmonary edemadyspnea, coughing, tight chest, substernal pain, headaches, chills, muscle aches, nausea, vomiting, diarrhea, emphysema, proteinuria, anosmia, and mild anemia. Exposures also cause kidney and lung damage

The lethal inhalation dose of cadmium oxide in humans is 2,500 mg/m3 for a 1 minute exposure. Lethal exposure has been established at 50 mg (cadmium)/m3 for 1 hour for cadmium oxide dust and 1/2 hour for the fume. These concentrations may be inhaled without sufficient discomfort to warn worker of exposure. Inhalation may cause acute tracheobronchitis, pneumonitis, and pulmonary edema. Exposure can cause kidney and lung damage. Acute exposure by inhalation may cause death by anoxia. The lowest human toxic inhalation concentration is 8.630 mg/m3/5 hours for the fume. Persons with respiratory disorders should be excluded from contact with this material.

Cadmium oxide is used as an electroplating chemical and in the manufacture of semiconductors and cadmium electrodes; synthesis of other cadmium salts; a component of silver alloys, phosphorus, glass and ceramic glazes, semiconductors, and batteries. Used as a vermicide

When heated to decomposition, CADMIUM OXIDE emits toxic fumes of cadmium. (Non-Specific--Cadmium Compounds) Fire may produce irritating or poisonous gases. Runoff from fire control or dilution water may cause pollution. Oxides of cadmium react explosively with magnesium when heated.

Move victim to fresh air. Call 911 or emergency medical service. Give artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; give artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing and shoes. In case of contact with substance, immediately flush skin or eyes with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin. Keep victim warm and quiet. Effects of exposure (inhalation, ingestion, or skin contact) to substance may be delayed. Ensure that medical personnel are aware of the material(s) involved and take precautions to protect themselves. Medical observation is recommended for 24 to 48 hours after breathing overexposure, as pulmonary edema may be delayed. As first aid for pulmonary edema, a doctor or authorizedparamedic may consider administering a drug or other inhalation therapy.

UN2570 Cadmium compounds, Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name Required.

Oxides of cadmium react explosively with magnesium, especially when heated. Heat above 700C causes slow decomposition. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); light metals: contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides, hydrogen sulfide, hydrazine nitrate. May ignite combustibles, such as wood, paper, oil, etc

Cadmium oxide forms brownish-red crystalsor a yellow to dark brown amorphous powder. Molecularweight=128.4; Freezing/Melting point=900℃ (slowdecomposition begins at 700℃); Sublimation point 51559℃. Hazard Identification (based on NFPA-704 MRating System): Health 3, Flammability 0, Reactivity 0.Very slightly soluble in water.

Form nitrate with HNO3, precipitate with H2S, filter, package and return to supplier.

Occurs in two forms, alpha form—a colorless amorphous powder, and beta form—a reddish-brown crystal; density 6.95 g/cm³ (alpha form) and 8.15 g/cm³ (beta form); decomposes on rapid heating at 900°C; sublimation temperature 1,559°C; insoluble in water and alkalis; dissolves in mineral acids.

Cadmium oxide is used as an electroplating chemical, catalyst, component of semiconductors, and starting material for PCV heat stabilizers; in glass and ceramic glazes; for production of cadmium electrodes in storage batteries; and in other applications.

In phosphors, semiconductors; manufacture of silver alloys, glass; in storage battery electrodes; as nematocide; as catalyst for organic reactions, in cadmium electroplating; in ceramic glazes.

This is used for cadmium plating baths, electrodes for batteries (cells), ceramic glazes, and insecticides. CdO is a deadly poison and carcinogen.

Cadmium oxide is prepared by the reaction of cadmium vapor with oxygen. The metal is first melted in a steel retort and transported into a heated chamber where it is vaporized. The vapor is reacted with air, and the cadmium oxide formed is collected in a bag house. The particle size of the product depends on the ratio of air to cadmium vapor. The oxide may be further purified and particles of uniform size may be obtained by calcination at low red heat.
Cadmium oxide also may be prepared by several other routes starting with various cadmium salts. The compound can be made by thermal decomposition of cadmium carbonate or cadmium hydroxide:
CdCO₃ → CdO + CO₂
Cd(OH)₂ → CdO + H₂O
Similar thermal decomposition of cadmium nitrate or sulfate would yield the oxide.
he oxide. Cadmium oxide also may be made by high temperature oxidation of cadmium sulfide:
2CdS + 3O₂ → 2CdO + 2SO₂
Finely divided oxide may be obtained by pyrolysis of cadmium salts of carboxylic acids, such as cadmium formate or oxalate.
(COOH)₂Cd → CdO + H₂O + 2CO
(COO)₂Cd → CdO + CO₂ + CO

Cadmium oxide is manufactured commercially by distilling cadmium metal from graphite retort and allowing vapor to react with air.

Color Code—Blue: Health Hazard: Store in asecure poison location. Prior to working with cadmiumoxide you should be trained on its proper handling and storage. Store in tightly closed containers in a cool,well-ventilated area, away from magnesium, oxidizers,combustible materials, heat, moisture, and acids. Where thischemical is used, handled, manufactured, or stored, useexplosion-proof electrical equipment and fittings. A regulated, marked area should be established where this chemical is handled, used, or stored in compliance with OSHAStandard 1910.1045.